+++ /dev/null
-// Rust JSON serialization library.
-// Copyright (c) 2011 Google Inc.
-
-#![forbid(non_camel_case_types)]
-#![allow(missing_docs)]
-
-//! JSON parsing and serialization
-//!
-//! # What is JSON?
-//!
-//! JSON (JavaScript Object Notation) is a way to write data in Javascript.
-//! Like XML, it allows to encode structured data in a text format that can be easily read by humans
-//! Its simple syntax and native compatibility with JavaScript have made it a widely used format.
-//!
-//! Data types that can be encoded are JavaScript types (see the `Json` enum for more details):
-//!
-//! * `Boolean`: equivalent to rust's `bool`
-//! * `Number`: equivalent to rust's `f64`
-//! * `String`: equivalent to rust's `String`
-//! * `Array`: equivalent to rust's `Vec<T>`, but also allowing objects of different types in the
-//! same array
-//! * `Object`: equivalent to rust's `BTreeMap<String, json::Json>`
-//! * `Null`
-//!
-//! An object is a series of string keys mapping to values, in `"key": value` format.
-//! Arrays are enclosed in square brackets ([ ... ]) and objects in curly brackets ({ ... }).
-//! A simple JSON document encoding a person, their age, address and phone numbers could look like
-//!
-//! ```json
-//! {
-//! "FirstName": "John",
-//! "LastName": "Doe",
-//! "Age": 43,
-//! "Address": {
-//! "Street": "Downing Street 10",
-//! "City": "London",
-//! "Country": "Great Britain"
-//! },
-//! "PhoneNumbers": [
-//! "+44 1234567",
-//! "+44 2345678"
-//! ]
-//! }
-//! ```
-//!
-//! # Rust Type-based Encoding and Decoding
-//!
-//! To be able to encode a piece of data, it must implement the
-//! `serialize::Encodable` trait. The `rustc_macros` crate provides an
-//! annotation to automatically generate the code for this trait: `#[derive(Encodable)]`.
-//!
-//! The JSON API provides an enum `json::Json` and a trait `ToJson` to encode objects.
-//! The `ToJson` trait provides a `to_json` method to convert an object into a `json::Json` value.
-//! A `json::Json` value can be encoded as a string or buffer using the functions described above.
-//! You can also use the `json::Encoder` object, which implements the `Encoder` trait.
-//!
-//! When using `ToJson` the `Encodable` trait implementation is not mandatory.
-//!
-//! # Examples of use
-//!
-//! ## Using Autoserialization
-//!
-//! Create a struct called `TestStruct` and serialize and deserialize it to and from JSON using the
-//! serialization API, using the derived serialization code.
-//!
-//! ```rust
-//! # #![feature(rustc_private)]
-//! use rustc_macros::{Encodable};
-//! use rustc_serialize::json;
-//!
-//! // Automatically generate `Encodable` trait implementations
-//! #[derive(Encodable)]
-//! pub struct TestStruct {
-//! data_int: u8,
-//! data_str: String,
-//! data_vector: Vec<u8>,
-//! }
-//!
-//! let object = TestStruct {
-//! data_int: 1,
-//! data_str: "homura".to_string(),
-//! data_vector: vec![2,3,4,5],
-//! };
-//!
-//! // Serialize using `json::encode`
-//! let encoded = json::encode(&object).unwrap();
-//! ```
-//!
-//! ## Using the `ToJson` trait
-//!
-//! The examples above use the `ToJson` trait to generate the JSON string, which is required
-//! for custom mappings.
-//!
-//! ### Simple example of `ToJson` usage
-//!
-//! ```rust
-//! # #![feature(rustc_private)]
-//! use rustc_macros::Encodable;
-//! use rustc_serialize::json::{self, ToJson, Json};
-//!
-//! // A custom data structure
-//! struct ComplexNum {
-//! a: f64,
-//! b: f64,
-//! }
-//!
-//! // JSON value representation
-//! impl ToJson for ComplexNum {
-//! fn to_json(&self) -> Json {
-//! Json::String(format!("{}+{}i", self.a, self.b))
-//! }
-//! }
-//!
-//! // Only generate `Encodable` trait implementation
-//! #[derive(Encodable)]
-//! pub struct ComplexNumRecord {
-//! uid: u8,
-//! dsc: String,
-//! val: Json,
-//! }
-//!
-//! let num = ComplexNum { a: 0.0001, b: 12.539 };
-//! let data: String = json::encode(&ComplexNumRecord{
-//! uid: 1,
-//! dsc: "test".to_string(),
-//! val: num.to_json(),
-//! }).unwrap();
-//! println!("data: {}", data);
-//! // data: {"uid":1,"dsc":"test","val":"0.0001+12.539i"};
-//! ```
-//!
-//! ### Verbose example of `ToJson` usage
-//!
-//! ```rust
-//! # #![feature(rustc_private)]
-//! use std::collections::BTreeMap;
-//! use rustc_serialize::json::{Json, ToJson};
-//!
-//! pub struct TestStruct {
-//! data_int: u8,
-//! data_str: String,
-//! data_vector: Vec<u8>,
-//! }
-//!
-//! // Specify encoding method manually
-//! impl ToJson for TestStruct {
-//! fn to_json(&self) -> Json {
-//! let mut d = BTreeMap::new();
-//! // All standard types implement `to_json()`, so use it
-//! d.insert("data_int".to_string(), self.data_int.to_json());
-//! d.insert("data_str".to_string(), self.data_str.to_json());
-//! d.insert("data_vector".to_string(), self.data_vector.to_json());
-//! Json::Object(d)
-//! }
-//! }
-//!
-//! // Serialize using `ToJson`
-//! let input_data = TestStruct {
-//! data_int: 1,
-//! data_str: "madoka".to_string(),
-//! data_vector: vec![2,3,4,5],
-//! };
-//! let json_obj: Json = input_data.to_json();
-//! let json_str: String = json_obj.to_string();
-//! ```
-
-use self::ErrorCode::*;
-use self::InternalStackElement::*;
-use self::JsonEvent::*;
-use self::ParserError::*;
-use self::ParserState::*;
-
-use std::borrow::Cow;
-use std::collections::{BTreeMap, HashMap};
-use std::mem::swap;
-use std::num::FpCategory as Fp;
-use std::ops::Index;
-use std::str::FromStr;
-use std::string;
-use std::{char, fmt, str};
-
-use crate::Encodable;
-
-/// Represents a json value
-#[derive(Clone, PartialEq, PartialOrd, Debug)]
-pub enum Json {
- I64(i64),
- U64(u64),
- F64(f64),
- String(string::String),
- Boolean(bool),
- Array(self::Array),
- Object(self::Object),
- Null,
-}
-
-pub type Array = Vec<Json>;
-pub type Object = BTreeMap<string::String, Json>;
-
-pub struct PrettyJson<'a> {
- inner: &'a Json,
-}
-
-pub struct AsJson<'a, T> {
- inner: &'a T,
-}
-pub struct AsPrettyJson<'a, T> {
- inner: &'a T,
- indent: Option<usize>,
-}
-
-/// The errors that can arise while parsing a JSON stream.
-#[derive(Clone, Copy, PartialEq, Debug)]
-pub enum ErrorCode {
- InvalidSyntax,
- InvalidNumber,
- EOFWhileParsingObject,
- EOFWhileParsingArray,
- EOFWhileParsingValue,
- EOFWhileParsingString,
- KeyMustBeAString,
- ExpectedColon,
- TrailingCharacters,
- TrailingComma,
- InvalidEscape,
- InvalidUnicodeCodePoint,
- LoneLeadingSurrogateInHexEscape,
- UnexpectedEndOfHexEscape,
- UnrecognizedHex,
- NotFourDigit,
- NotUtf8,
-}
-
-#[derive(Clone, PartialEq, Debug)]
-pub enum ParserError {
- /// msg, line, col
- SyntaxError(ErrorCode, usize, usize),
-}
-
-// Builder and Parser have the same errors.
-pub type BuilderError = ParserError;
-
-#[derive(Copy, Clone, Debug)]
-pub enum EncoderError {
- FmtError(fmt::Error),
- BadHashmapKey,
-}
-
-/// Returns a readable error string for a given error code.
-pub fn error_str(error: ErrorCode) -> &'static str {
- match error {
- InvalidSyntax => "invalid syntax",
- InvalidNumber => "invalid number",
- EOFWhileParsingObject => "EOF While parsing object",
- EOFWhileParsingArray => "EOF While parsing array",
- EOFWhileParsingValue => "EOF While parsing value",
- EOFWhileParsingString => "EOF While parsing string",
- KeyMustBeAString => "key must be a string",
- ExpectedColon => "expected `:`",
- TrailingCharacters => "trailing characters",
- TrailingComma => "trailing comma",
- InvalidEscape => "invalid escape",
- UnrecognizedHex => "invalid \\u{ esc}ape (unrecognized hex)",
- NotFourDigit => "invalid \\u{ esc}ape (not four digits)",
- NotUtf8 => "contents not utf-8",
- InvalidUnicodeCodePoint => "invalid Unicode code point",
- LoneLeadingSurrogateInHexEscape => "lone leading surrogate in hex escape",
- UnexpectedEndOfHexEscape => "unexpected end of hex escape",
- }
-}
-
-/// Shortcut function to encode a `T` into a JSON `String`
-pub fn encode<T: for<'r> crate::Encodable<Encoder<'r>>>(
- object: &T,
-) -> Result<string::String, EncoderError> {
- let mut s = String::new();
- {
- let mut encoder = Encoder::new(&mut s);
- object.encode(&mut encoder)?;
- }
- Ok(s)
-}
-
-impl fmt::Display for ErrorCode {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- error_str(*self).fmt(f)
- }
-}
-
-impl fmt::Display for ParserError {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- // FIXME this should be a nicer error
- fmt::Debug::fmt(self, f)
- }
-}
-
-impl fmt::Display for EncoderError {
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- // FIXME this should be a nicer error
- fmt::Debug::fmt(self, f)
- }
-}
-
-impl std::error::Error for EncoderError {}
-
-impl From<fmt::Error> for EncoderError {
- /// Converts a [`fmt::Error`] into `EncoderError`
- ///
- /// This conversion does not allocate memory.
- fn from(err: fmt::Error) -> EncoderError {
- EncoderError::FmtError(err)
- }
-}
-
-pub type EncodeResult = Result<(), EncoderError>;
-
-fn escape_str(wr: &mut dyn fmt::Write, v: &str) -> EncodeResult {
- wr.write_str("\"")?;
-
- let mut start = 0;
-
- for (i, byte) in v.bytes().enumerate() {
- let escaped = match byte {
- b'"' => "\\\"",
- b'\\' => "\\\\",
- b'\x00' => "\\u0000",
- b'\x01' => "\\u0001",
- b'\x02' => "\\u0002",
- b'\x03' => "\\u0003",
- b'\x04' => "\\u0004",
- b'\x05' => "\\u0005",
- b'\x06' => "\\u0006",
- b'\x07' => "\\u0007",
- b'\x08' => "\\b",
- b'\t' => "\\t",
- b'\n' => "\\n",
- b'\x0b' => "\\u000b",
- b'\x0c' => "\\f",
- b'\r' => "\\r",
- b'\x0e' => "\\u000e",
- b'\x0f' => "\\u000f",
- b'\x10' => "\\u0010",
- b'\x11' => "\\u0011",
- b'\x12' => "\\u0012",
- b'\x13' => "\\u0013",
- b'\x14' => "\\u0014",
- b'\x15' => "\\u0015",
- b'\x16' => "\\u0016",
- b'\x17' => "\\u0017",
- b'\x18' => "\\u0018",
- b'\x19' => "\\u0019",
- b'\x1a' => "\\u001a",
- b'\x1b' => "\\u001b",
- b'\x1c' => "\\u001c",
- b'\x1d' => "\\u001d",
- b'\x1e' => "\\u001e",
- b'\x1f' => "\\u001f",
- b'\x7f' => "\\u007f",
- _ => {
- continue;
- }
- };
-
- if start < i {
- wr.write_str(&v[start..i])?;
- }
-
- wr.write_str(escaped)?;
-
- start = i + 1;
- }
-
- if start != v.len() {
- wr.write_str(&v[start..])?;
- }
-
- wr.write_str("\"")?;
- Ok(())
-}
-
-fn escape_char(writer: &mut dyn fmt::Write, v: char) -> EncodeResult {
- escape_str(writer, v.encode_utf8(&mut [0; 4]))
-}
-
-fn spaces(wr: &mut dyn fmt::Write, mut n: usize) -> EncodeResult {
- const BUF: &str = " ";
-
- while n >= BUF.len() {
- wr.write_str(BUF)?;
- n -= BUF.len();
- }
-
- if n > 0 {
- wr.write_str(&BUF[..n])?;
- }
- Ok(())
-}
-
-fn fmt_number_or_null(v: f64) -> string::String {
- match v.classify() {
- Fp::Nan | Fp::Infinite => string::String::from("null"),
- _ if v.fract() != 0f64 => v.to_string(),
- _ => v.to_string() + ".0",
- }
-}
-
-/// A structure for implementing serialization to JSON.
-pub struct Encoder<'a> {
- writer: &'a mut (dyn fmt::Write + 'a),
- is_emitting_map_key: bool,
-}
-
-impl<'a> Encoder<'a> {
- /// Creates a new JSON encoder whose output will be written to the writer
- /// specified.
- pub fn new(writer: &'a mut dyn fmt::Write) -> Encoder<'a> {
- Encoder { writer, is_emitting_map_key: false }
- }
-}
-
-macro_rules! emit_enquoted_if_mapkey {
- ($enc:ident,$e:expr) => {{
- if $enc.is_emitting_map_key {
- write!($enc.writer, "\"{}\"", $e)?;
- } else {
- write!($enc.writer, "{}", $e)?;
- }
- Ok(())
- }};
-}
-
-impl<'a> crate::Encoder for Encoder<'a> {
- type Error = EncoderError;
-
- fn emit_unit(&mut self) -> EncodeResult {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- write!(self.writer, "null")?;
- Ok(())
- }
-
- fn emit_usize(&mut self, v: usize) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u128(&mut self, v: u128) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u64(&mut self, v: u64) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u32(&mut self, v: u32) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u16(&mut self, v: u16) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u8(&mut self, v: u8) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
-
- fn emit_isize(&mut self, v: isize) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i128(&mut self, v: i128) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i64(&mut self, v: i64) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i32(&mut self, v: i32) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i16(&mut self, v: i16) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i8(&mut self, v: i8) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
-
- fn emit_bool(&mut self, v: bool) -> EncodeResult {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if v {
- write!(self.writer, "true")?;
- } else {
- write!(self.writer, "false")?;
- }
- Ok(())
- }
-
- fn emit_f64(&mut self, v: f64) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, fmt_number_or_null(v))
- }
- fn emit_f32(&mut self, v: f32) -> EncodeResult {
- self.emit_f64(f64::from(v))
- }
-
- fn emit_char(&mut self, v: char) -> EncodeResult {
- escape_char(self.writer, v)
- }
- fn emit_str(&mut self, v: &str) -> EncodeResult {
- escape_str(self.writer, v)
- }
- fn emit_raw_bytes(&mut self, s: &[u8]) -> Result<(), Self::Error> {
- for &c in s.iter() {
- self.emit_u8(c)?;
- }
- Ok(())
- }
-
- fn emit_enum<F>(&mut self, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- f(self)
- }
-
- fn emit_enum_variant<F>(&mut self, name: &str, _id: usize, cnt: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- // enums are encoded as strings or objects
- // Bunny => "Bunny"
- // Kangaroo(34,"William") => {"variant": "Kangaroo", "fields": [34,"William"]}
- if cnt == 0 {
- escape_str(self.writer, name)
- } else {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- write!(self.writer, "{{\"variant\":")?;
- escape_str(self.writer, name)?;
- write!(self.writer, ",\"fields\":[")?;
- f(self)?;
- write!(self.writer, "]}}")?;
- Ok(())
- }
- }
-
- fn emit_fieldless_enum_variant<const ID: usize>(
- &mut self,
- name: &str,
- ) -> Result<(), Self::Error> {
- escape_str(self.writer, name)
- }
-
- fn emit_enum_variant_arg<F>(&mut self, first: bool, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if !first {
- write!(self.writer, ",")?;
- }
- f(self)
- }
-
- fn emit_struct<F>(&mut self, _: bool, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- write!(self.writer, "{{")?;
- f(self)?;
- write!(self.writer, "}}")?;
- Ok(())
- }
-
- fn emit_struct_field<F>(&mut self, name: &str, first: bool, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if !first {
- write!(self.writer, ",")?;
- }
- escape_str(self.writer, name)?;
- write!(self.writer, ":")?;
- f(self)
- }
-
- fn emit_tuple<F>(&mut self, len: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- self.emit_seq(len, f)
- }
- fn emit_tuple_arg<F>(&mut self, idx: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- self.emit_seq_elt(idx, f)
- }
-
- fn emit_option<F>(&mut self, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- f(self)
- }
- fn emit_option_none(&mut self) -> EncodeResult {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- self.emit_unit()
- }
- fn emit_option_some<F>(&mut self, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- f(self)
- }
-
- fn emit_seq<F>(&mut self, _len: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- write!(self.writer, "[")?;
- f(self)?;
- write!(self.writer, "]")?;
- Ok(())
- }
-
- fn emit_seq_elt<F>(&mut self, idx: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if idx != 0 {
- write!(self.writer, ",")?;
- }
- f(self)
- }
-
- fn emit_map<F>(&mut self, _len: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- write!(self.writer, "{{")?;
- f(self)?;
- write!(self.writer, "}}")?;
- Ok(())
- }
-
- fn emit_map_elt_key<F>(&mut self, idx: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if idx != 0 {
- write!(self.writer, ",")?
- }
- self.is_emitting_map_key = true;
- f(self)?;
- self.is_emitting_map_key = false;
- Ok(())
- }
-
- fn emit_map_elt_val<F>(&mut self, f: F) -> EncodeResult
- where
- F: FnOnce(&mut Encoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- write!(self.writer, ":")?;
- f(self)
- }
-}
-
-/// Another encoder for JSON, but prints out human-readable JSON instead of
-/// compact data
-pub struct PrettyEncoder<'a> {
- writer: &'a mut (dyn fmt::Write + 'a),
- curr_indent: usize,
- indent: usize,
- is_emitting_map_key: bool,
-}
-
-impl<'a> PrettyEncoder<'a> {
- /// Creates a new encoder whose output will be written to the specified writer
- pub fn new(writer: &'a mut dyn fmt::Write) -> PrettyEncoder<'a> {
- PrettyEncoder { writer, curr_indent: 0, indent: 2, is_emitting_map_key: false }
- }
-
- /// Sets the number of spaces to indent for each level.
- /// This is safe to set during encoding.
- pub fn set_indent(&mut self, indent: usize) {
- // self.indent very well could be 0 so we need to use checked division.
- let level = self.curr_indent.checked_div(self.indent).unwrap_or(0);
- self.indent = indent;
- self.curr_indent = level * self.indent;
- }
-}
-
-impl<'a> crate::Encoder for PrettyEncoder<'a> {
- type Error = EncoderError;
-
- fn emit_unit(&mut self) -> EncodeResult {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- write!(self.writer, "null")?;
- Ok(())
- }
-
- fn emit_usize(&mut self, v: usize) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u128(&mut self, v: u128) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u64(&mut self, v: u64) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u32(&mut self, v: u32) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u16(&mut self, v: u16) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_u8(&mut self, v: u8) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
-
- fn emit_isize(&mut self, v: isize) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i128(&mut self, v: i128) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i64(&mut self, v: i64) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i32(&mut self, v: i32) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i16(&mut self, v: i16) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
- fn emit_i8(&mut self, v: i8) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, v)
- }
-
- fn emit_bool(&mut self, v: bool) -> EncodeResult {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if v {
- write!(self.writer, "true")?;
- } else {
- write!(self.writer, "false")?;
- }
- Ok(())
- }
-
- fn emit_f64(&mut self, v: f64) -> EncodeResult {
- emit_enquoted_if_mapkey!(self, fmt_number_or_null(v))
- }
- fn emit_f32(&mut self, v: f32) -> EncodeResult {
- self.emit_f64(f64::from(v))
- }
-
- fn emit_char(&mut self, v: char) -> EncodeResult {
- escape_char(self.writer, v)
- }
- fn emit_str(&mut self, v: &str) -> EncodeResult {
- escape_str(self.writer, v)
- }
- fn emit_raw_bytes(&mut self, s: &[u8]) -> Result<(), Self::Error> {
- for &c in s.iter() {
- self.emit_u8(c)?;
- }
- Ok(())
- }
-
- fn emit_enum<F>(&mut self, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- f(self)
- }
-
- fn emit_enum_variant<F>(&mut self, name: &str, _id: usize, cnt: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if cnt == 0 {
- escape_str(self.writer, name)
- } else {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- writeln!(self.writer, "{{")?;
- self.curr_indent += self.indent;
- spaces(self.writer, self.curr_indent)?;
- write!(self.writer, "\"variant\": ")?;
- escape_str(self.writer, name)?;
- writeln!(self.writer, ",")?;
- spaces(self.writer, self.curr_indent)?;
- writeln!(self.writer, "\"fields\": [")?;
- self.curr_indent += self.indent;
- f(self)?;
- self.curr_indent -= self.indent;
- writeln!(self.writer)?;
- spaces(self.writer, self.curr_indent)?;
- self.curr_indent -= self.indent;
- writeln!(self.writer, "]")?;
- spaces(self.writer, self.curr_indent)?;
- write!(self.writer, "}}")?;
- Ok(())
- }
- }
-
- fn emit_fieldless_enum_variant<const ID: usize>(
- &mut self,
- name: &str,
- ) -> Result<(), Self::Error> {
- escape_str(self.writer, name)
- }
-
- fn emit_enum_variant_arg<F>(&mut self, first: bool, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if !first {
- writeln!(self.writer, ",")?;
- }
- spaces(self.writer, self.curr_indent)?;
- f(self)
- }
-
- fn emit_struct<F>(&mut self, no_fields: bool, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if no_fields {
- write!(self.writer, "{{}}")?;
- } else {
- write!(self.writer, "{{")?;
- self.curr_indent += self.indent;
- f(self)?;
- self.curr_indent -= self.indent;
- writeln!(self.writer)?;
- spaces(self.writer, self.curr_indent)?;
- write!(self.writer, "}}")?;
- }
- Ok(())
- }
-
- fn emit_struct_field<F>(&mut self, name: &str, first: bool, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if first {
- writeln!(self.writer)?;
- } else {
- writeln!(self.writer, ",")?;
- }
- spaces(self.writer, self.curr_indent)?;
- escape_str(self.writer, name)?;
- write!(self.writer, ": ")?;
- f(self)
- }
-
- fn emit_tuple<F>(&mut self, len: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- self.emit_seq(len, f)
- }
- fn emit_tuple_arg<F>(&mut self, idx: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- self.emit_seq_elt(idx, f)
- }
-
- fn emit_option<F>(&mut self, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- f(self)
- }
- fn emit_option_none(&mut self) -> EncodeResult {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- self.emit_unit()
- }
- fn emit_option_some<F>(&mut self, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- f(self)
- }
-
- fn emit_seq<F>(&mut self, len: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if len == 0 {
- write!(self.writer, "[]")?;
- } else {
- write!(self.writer, "[")?;
- self.curr_indent += self.indent;
- f(self)?;
- self.curr_indent -= self.indent;
- writeln!(self.writer)?;
- spaces(self.writer, self.curr_indent)?;
- write!(self.writer, "]")?;
- }
- Ok(())
- }
-
- fn emit_seq_elt<F>(&mut self, idx: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if idx == 0 {
- writeln!(self.writer)?;
- } else {
- writeln!(self.writer, ",")?;
- }
- spaces(self.writer, self.curr_indent)?;
- f(self)
- }
-
- fn emit_map<F>(&mut self, len: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if len == 0 {
- write!(self.writer, "{{}}")?;
- } else {
- write!(self.writer, "{{")?;
- self.curr_indent += self.indent;
- f(self)?;
- self.curr_indent -= self.indent;
- writeln!(self.writer)?;
- spaces(self.writer, self.curr_indent)?;
- write!(self.writer, "}}")?;
- }
- Ok(())
- }
-
- fn emit_map_elt_key<F>(&mut self, idx: usize, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- if idx == 0 {
- writeln!(self.writer)?;
- } else {
- writeln!(self.writer, ",")?;
- }
- spaces(self.writer, self.curr_indent)?;
- self.is_emitting_map_key = true;
- f(self)?;
- self.is_emitting_map_key = false;
- Ok(())
- }
-
- fn emit_map_elt_val<F>(&mut self, f: F) -> EncodeResult
- where
- F: FnOnce(&mut PrettyEncoder<'a>) -> EncodeResult,
- {
- if self.is_emitting_map_key {
- return Err(EncoderError::BadHashmapKey);
- }
- write!(self.writer, ": ")?;
- f(self)
- }
-}
-
-impl<E: crate::Encoder> Encodable<E> for Json {
- fn encode(&self, e: &mut E) -> Result<(), E::Error> {
- match *self {
- Json::I64(v) => v.encode(e),
- Json::U64(v) => v.encode(e),
- Json::F64(v) => v.encode(e),
- Json::String(ref v) => v.encode(e),
- Json::Boolean(v) => v.encode(e),
- Json::Array(ref v) => v.encode(e),
- Json::Object(ref v) => v.encode(e),
- Json::Null => e.emit_unit(),
- }
- }
-}
-
-/// Creates an `AsJson` wrapper which can be used to print a value as JSON
-/// on-the-fly via `write!`
-pub fn as_json<T>(t: &T) -> AsJson<'_, T> {
- AsJson { inner: t }
-}
-
-/// Creates an `AsPrettyJson` wrapper which can be used to print a value as JSON
-/// on-the-fly via `write!`
-pub fn as_pretty_json<T>(t: &T) -> AsPrettyJson<'_, T> {
- AsPrettyJson { inner: t, indent: None }
-}
-
-impl Json {
- /// Borrow this json object as a pretty object to generate a pretty
- /// representation for it via `Display`.
- pub fn pretty(&self) -> PrettyJson<'_> {
- PrettyJson { inner: self }
- }
-
- /// If the Json value is an Object, returns the value associated with the provided key.
- /// Otherwise, returns None.
- pub fn find(&self, key: &str) -> Option<&Json> {
- match *self {
- Json::Object(ref map) => map.get(key),
- _ => None,
- }
- }
-
- /// If the Json value is an Object, deletes the value associated with the
- /// provided key from the Object and returns it. Otherwise, returns None.
- pub fn remove_key(&mut self, key: &str) -> Option<Json> {
- match *self {
- Json::Object(ref mut map) => map.remove(key),
- _ => None,
- }
- }
-
- /// Attempts to get a nested Json Object for each key in `keys`.
- /// If any key is found not to exist, `find_path` will return `None`.
- /// Otherwise, it will return the Json value associated with the final key.
- pub fn find_path<'a>(&'a self, keys: &[&str]) -> Option<&'a Json> {
- let mut target = self;
- for key in keys {
- target = target.find(*key)?;
- }
- Some(target)
- }
-
- /// If the Json value is an Object, performs a depth-first search until
- /// a value associated with the provided key is found. If no value is found
- /// or the Json value is not an Object, returns `None`.
- pub fn search(&self, key: &str) -> Option<&Json> {
- match *self {
- Json::Object(ref map) => match map.get(key) {
- Some(json_value) => Some(json_value),
- None => {
- for v in map.values() {
- match v.search(key) {
- x if x.is_some() => return x,
- _ => (),
- }
- }
- None
- }
- },
- _ => None,
- }
- }
-
- /// Returns `true` if the Json value is an `Object`.
- pub fn is_object(&self) -> bool {
- self.as_object().is_some()
- }
-
- /// If the Json value is an `Object`, returns the associated `BTreeMap`;
- /// returns `None` otherwise.
- pub fn as_object(&self) -> Option<&Object> {
- match *self {
- Json::Object(ref map) => Some(map),
- _ => None,
- }
- }
-
- /// Returns `true` if the Json value is an `Array`.
- pub fn is_array(&self) -> bool {
- self.as_array().is_some()
- }
-
- /// If the Json value is an `Array`, returns the associated vector;
- /// returns `None` otherwise.
- pub fn as_array(&self) -> Option<&Array> {
- match *self {
- Json::Array(ref array) => Some(&*array),
- _ => None,
- }
- }
-
- /// Returns `true` if the Json value is a `String`.
- pub fn is_string(&self) -> bool {
- self.as_string().is_some()
- }
-
- /// If the Json value is a `String`, returns the associated `str`;
- /// returns `None` otherwise.
- pub fn as_string(&self) -> Option<&str> {
- match *self {
- Json::String(ref s) => Some(&s[..]),
- _ => None,
- }
- }
-
- /// Returns `true` if the Json value is a `Number`.
- pub fn is_number(&self) -> bool {
- matches!(*self, Json::I64(_) | Json::U64(_) | Json::F64(_))
- }
-
- /// Returns `true` if the Json value is an `i64`.
- pub fn is_i64(&self) -> bool {
- matches!(*self, Json::I64(_))
- }
-
- /// Returns `true` if the Json value is a `u64`.
- pub fn is_u64(&self) -> bool {
- matches!(*self, Json::U64(_))
- }
-
- /// Returns `true` if the Json value is a `f64`.
- pub fn is_f64(&self) -> bool {
- matches!(*self, Json::F64(_))
- }
-
- /// If the Json value is a number, returns or cast it to an `i64`;
- /// returns `None` otherwise.
- pub fn as_i64(&self) -> Option<i64> {
- match *self {
- Json::I64(n) => Some(n),
- Json::U64(n) => Some(n as i64),
- _ => None,
- }
- }
-
- /// If the Json value is a number, returns or cast it to a `u64`;
- /// returns `None` otherwise.
- pub fn as_u64(&self) -> Option<u64> {
- match *self {
- Json::I64(n) => Some(n as u64),
- Json::U64(n) => Some(n),
- _ => None,
- }
- }
-
- /// If the Json value is a number, returns or cast it to a `f64`;
- /// returns `None` otherwise.
- pub fn as_f64(&self) -> Option<f64> {
- match *self {
- Json::I64(n) => Some(n as f64),
- Json::U64(n) => Some(n as f64),
- Json::F64(n) => Some(n),
- _ => None,
- }
- }
-
- /// Returns `true` if the Json value is a `Boolean`.
- pub fn is_boolean(&self) -> bool {
- self.as_boolean().is_some()
- }
-
- /// If the Json value is a `Boolean`, returns the associated `bool`;
- /// returns `None` otherwise.
- pub fn as_boolean(&self) -> Option<bool> {
- match *self {
- Json::Boolean(b) => Some(b),
- _ => None,
- }
- }
-
- /// Returns `true` if the Json value is a `Null`.
- pub fn is_null(&self) -> bool {
- self.as_null().is_some()
- }
-
- /// If the Json value is a `Null`, returns `()`;
- /// returns `None` otherwise.
- pub fn as_null(&self) -> Option<()> {
- match *self {
- Json::Null => Some(()),
- _ => None,
- }
- }
-}
-
-impl<'a> Index<&'a str> for Json {
- type Output = Json;
-
- fn index(&self, idx: &'a str) -> &Json {
- self.find(idx).unwrap()
- }
-}
-
-impl Index<usize> for Json {
- type Output = Json;
-
- fn index(&self, idx: usize) -> &Json {
- match *self {
- Json::Array(ref v) => &v[idx],
- _ => panic!("can only index Json with usize if it is an array"),
- }
- }
-}
-
-/// The output of the streaming parser.
-#[derive(PartialEq, Clone, Debug)]
-pub enum JsonEvent {
- ObjectStart,
- ObjectEnd,
- ArrayStart,
- ArrayEnd,
- BooleanValue(bool),
- I64Value(i64),
- U64Value(u64),
- F64Value(f64),
- StringValue(string::String),
- NullValue,
- Error(ParserError),
-}
-
-#[derive(PartialEq, Debug)]
-enum ParserState {
- // Parse a value in an array, true means first element.
- ParseArray(bool),
- // Parse ',' or ']' after an element in an array.
- ParseArrayComma,
- // Parse a key:value in an object, true means first element.
- ParseObject(bool),
- // Parse ',' or ']' after an element in an object.
- ParseObjectComma,
- // Initial state.
- ParseStart,
- // Expecting the stream to end.
- ParseBeforeFinish,
- // Parsing can't continue.
- ParseFinished,
-}
-
-/// A Stack represents the current position of the parser in the logical
-/// structure of the JSON stream.
-///
-/// An example is `foo.bar[3].x`.
-#[derive(Default)]
-pub struct Stack {
- stack: Vec<InternalStackElement>,
- str_buffer: Vec<u8>,
-}
-
-/// StackElements compose a Stack.
-///
-/// As an example, `StackElement::Key("foo")`, `StackElement::Key("bar")`,
-/// `StackElement::Index(3)`, and `StackElement::Key("x")` are the
-/// StackElements composing the stack that represents `foo.bar[3].x`.
-#[derive(PartialEq, Clone, Debug)]
-pub enum StackElement<'l> {
- Index(u32),
- Key(&'l str),
-}
-
-// Internally, Key elements are stored as indices in a buffer to avoid
-// allocating a string for every member of an object.
-#[derive(PartialEq, Clone, Debug)]
-enum InternalStackElement {
- InternalIndex(u32),
- InternalKey(u16, u16), // start, size
-}
-
-impl Stack {
- pub fn new() -> Stack {
- Self::default()
- }
-
- /// Returns The number of elements in the Stack.
- pub fn len(&self) -> usize {
- self.stack.len()
- }
-
- /// Returns `true` if the stack is empty.
- pub fn is_empty(&self) -> bool {
- self.stack.is_empty()
- }
-
- /// Provides access to the StackElement at a given index.
- /// lower indices are at the bottom of the stack while higher indices are
- /// at the top.
- pub fn get(&self, idx: usize) -> StackElement<'_> {
- match self.stack[idx] {
- InternalIndex(i) => StackElement::Index(i),
- InternalKey(start, size) => StackElement::Key(
- str::from_utf8(&self.str_buffer[start as usize..start as usize + size as usize])
- .unwrap(),
- ),
- }
- }
-
- /// Compares this stack with an array of StackElement<'_>s.
- pub fn is_equal_to(&self, rhs: &[StackElement<'_>]) -> bool {
- if self.stack.len() != rhs.len() {
- return false;
- }
- for (i, r) in rhs.iter().enumerate() {
- if self.get(i) != *r {
- return false;
- }
- }
- true
- }
-
- /// Returns `true` if the bottom-most elements of this stack are the same as
- /// the ones passed as parameter.
- pub fn starts_with(&self, rhs: &[StackElement<'_>]) -> bool {
- if self.stack.len() < rhs.len() {
- return false;
- }
- for (i, r) in rhs.iter().enumerate() {
- if self.get(i) != *r {
- return false;
- }
- }
- true
- }
-
- /// Returns `true` if the top-most elements of this stack are the same as
- /// the ones passed as parameter.
- pub fn ends_with(&self, rhs: &[StackElement<'_>]) -> bool {
- if self.stack.len() < rhs.len() {
- return false;
- }
- let offset = self.stack.len() - rhs.len();
- for (i, r) in rhs.iter().enumerate() {
- if self.get(i + offset) != *r {
- return false;
- }
- }
- true
- }
-
- /// Returns the top-most element (if any).
- pub fn top(&self) -> Option<StackElement<'_>> {
- match self.stack.last() {
- None => None,
- Some(&InternalIndex(i)) => Some(StackElement::Index(i)),
- Some(&InternalKey(start, size)) => Some(StackElement::Key(
- str::from_utf8(&self.str_buffer[start as usize..(start + size) as usize]).unwrap(),
- )),
- }
- }
-
- // Used by Parser to insert StackElement::Key elements at the top of the stack.
- fn push_key(&mut self, key: string::String) {
- self.stack.push(InternalKey(self.str_buffer.len() as u16, key.len() as u16));
- self.str_buffer.extend(key.as_bytes());
- }
-
- // Used by Parser to insert StackElement::Index elements at the top of the stack.
- fn push_index(&mut self, index: u32) {
- self.stack.push(InternalIndex(index));
- }
-
- // Used by Parser to remove the top-most element of the stack.
- fn pop(&mut self) {
- assert!(!self.is_empty());
- match *self.stack.last().unwrap() {
- InternalKey(_, sz) => {
- let new_size = self.str_buffer.len() - sz as usize;
- self.str_buffer.truncate(new_size);
- }
- InternalIndex(_) => {}
- }
- self.stack.pop();
- }
-
- // Used by Parser to test whether the top-most element is an index.
- fn last_is_index(&self) -> bool {
- matches!(self.stack.last(), Some(InternalIndex(_)))
- }
-
- // Used by Parser to increment the index of the top-most element.
- fn bump_index(&mut self) {
- let len = self.stack.len();
- let idx = match *self.stack.last().unwrap() {
- InternalIndex(i) => i + 1,
- _ => {
- panic!();
- }
- };
- self.stack[len - 1] = InternalIndex(idx);
- }
-}
-
-/// A streaming JSON parser implemented as an iterator of JsonEvent, consuming
-/// an iterator of char.
-pub struct Parser<T> {
- rdr: T,
- ch: Option<char>,
- line: usize,
- col: usize,
- // We maintain a stack representing where we are in the logical structure
- // of the JSON stream.
- stack: Stack,
- // A state machine is kept to make it possible to interrupt and resume parsing.
- state: ParserState,
-}
-
-impl<T: Iterator<Item = char>> Iterator for Parser<T> {
- type Item = JsonEvent;
-
- fn next(&mut self) -> Option<JsonEvent> {
- if self.state == ParseFinished {
- return None;
- }
-
- if self.state == ParseBeforeFinish {
- self.parse_whitespace();
- // Make sure there is no trailing characters.
- if self.eof() {
- self.state = ParseFinished;
- return None;
- } else {
- return Some(self.error_event(TrailingCharacters));
- }
- }
-
- Some(self.parse())
- }
-}
-
-impl<T: Iterator<Item = char>> Parser<T> {
- /// Creates the JSON parser.
- pub fn new(rdr: T) -> Parser<T> {
- let mut p = Parser {
- rdr,
- ch: Some('\x00'),
- line: 1,
- col: 0,
- stack: Stack::new(),
- state: ParseStart,
- };
- p.bump();
- p
- }
-
- /// Provides access to the current position in the logical structure of the
- /// JSON stream.
- pub fn stack(&self) -> &Stack {
- &self.stack
- }
-
- fn eof(&self) -> bool {
- self.ch.is_none()
- }
- fn ch_or_null(&self) -> char {
- self.ch.unwrap_or('\x00')
- }
- fn bump(&mut self) {
- self.ch = self.rdr.next();
-
- if self.ch_is('\n') {
- self.line += 1;
- self.col = 1;
- } else {
- self.col += 1;
- }
- }
-
- fn next_char(&mut self) -> Option<char> {
- self.bump();
- self.ch
- }
- fn ch_is(&self, c: char) -> bool {
- self.ch == Some(c)
- }
-
- fn error<U>(&self, reason: ErrorCode) -> Result<U, ParserError> {
- Err(SyntaxError(reason, self.line, self.col))
- }
-
- fn parse_whitespace(&mut self) {
- while self.ch_is(' ') || self.ch_is('\n') || self.ch_is('\t') || self.ch_is('\r') {
- self.bump();
- }
- }
-
- fn parse_number(&mut self) -> JsonEvent {
- let neg = if self.ch_is('-') {
- self.bump();
- true
- } else {
- false
- };
-
- let res = match self.parse_u64() {
- Ok(res) => res,
- Err(e) => {
- return Error(e);
- }
- };
-
- if self.ch_is('.') || self.ch_is('e') || self.ch_is('E') {
- let mut res = res as f64;
-
- if self.ch_is('.') {
- res = match self.parse_decimal(res) {
- Ok(res) => res,
- Err(e) => {
- return Error(e);
- }
- };
- }
-
- if self.ch_is('e') || self.ch_is('E') {
- res = match self.parse_exponent(res) {
- Ok(res) => res,
- Err(e) => {
- return Error(e);
- }
- };
- }
-
- if neg {
- res *= -1.0;
- }
-
- F64Value(res)
- } else if neg {
- let res = (res as i64).wrapping_neg();
-
- // Make sure we didn't underflow.
- if res > 0 {
- Error(SyntaxError(InvalidNumber, self.line, self.col))
- } else {
- I64Value(res)
- }
- } else {
- U64Value(res)
- }
- }
-
- fn parse_u64(&mut self) -> Result<u64, ParserError> {
- let mut accum = 0u64;
- let last_accum = 0; // necessary to detect overflow.
-
- match self.ch_or_null() {
- '0' => {
- self.bump();
-
- // A leading '0' must be the only digit before the decimal point.
- if let '0'..='9' = self.ch_or_null() {
- return self.error(InvalidNumber);
- }
- }
- '1'..='9' => {
- while !self.eof() {
- match self.ch_or_null() {
- c @ '0'..='9' => {
- accum = accum.wrapping_mul(10);
- accum = accum.wrapping_add((c as u64) - ('0' as u64));
-
- // Detect overflow by comparing to the last value.
- if accum <= last_accum {
- return self.error(InvalidNumber);
- }
-
- self.bump();
- }
- _ => break,
- }
- }
- }
- _ => return self.error(InvalidNumber),
- }
-
- Ok(accum)
- }
-
- fn parse_decimal(&mut self, mut res: f64) -> Result<f64, ParserError> {
- self.bump();
-
- // Make sure a digit follows the decimal place.
- match self.ch_or_null() {
- '0'..='9' => (),
- _ => return self.error(InvalidNumber),
- }
-
- let mut dec = 1.0;
- while !self.eof() {
- match self.ch_or_null() {
- c @ '0'..='9' => {
- dec /= 10.0;
- res += (((c as isize) - ('0' as isize)) as f64) * dec;
- self.bump();
- }
- _ => break,
- }
- }
-
- Ok(res)
- }
-
- fn parse_exponent(&mut self, mut res: f64) -> Result<f64, ParserError> {
- self.bump();
-
- let mut exp = 0;
- let mut neg_exp = false;
-
- if self.ch_is('+') {
- self.bump();
- } else if self.ch_is('-') {
- self.bump();
- neg_exp = true;
- }
-
- // Make sure a digit follows the exponent place.
- match self.ch_or_null() {
- '0'..='9' => (),
- _ => return self.error(InvalidNumber),
- }
- while !self.eof() {
- match self.ch_or_null() {
- c @ '0'..='9' => {
- exp *= 10;
- exp += (c as usize) - ('0' as usize);
-
- self.bump();
- }
- _ => break,
- }
- }
-
- let exp = 10_f64.powi(exp as i32);
- if neg_exp {
- res /= exp;
- } else {
- res *= exp;
- }
-
- Ok(res)
- }
-
- fn decode_hex_escape(&mut self) -> Result<u16, ParserError> {
- let mut i = 0;
- let mut n = 0;
- while i < 4 && !self.eof() {
- self.bump();
- n = match self.ch_or_null() {
- c @ '0'..='9' => n * 16 + ((c as u16) - ('0' as u16)),
- 'a' | 'A' => n * 16 + 10,
- 'b' | 'B' => n * 16 + 11,
- 'c' | 'C' => n * 16 + 12,
- 'd' | 'D' => n * 16 + 13,
- 'e' | 'E' => n * 16 + 14,
- 'f' | 'F' => n * 16 + 15,
- _ => return self.error(InvalidEscape),
- };
-
- i += 1;
- }
-
- // Error out if we didn't parse 4 digits.
- if i != 4 {
- return self.error(InvalidEscape);
- }
-
- Ok(n)
- }
-
- fn parse_str(&mut self) -> Result<string::String, ParserError> {
- let mut escape = false;
- let mut res = string::String::new();
-
- loop {
- self.bump();
- if self.eof() {
- return self.error(EOFWhileParsingString);
- }
-
- if escape {
- match self.ch_or_null() {
- '"' => res.push('"'),
- '\\' => res.push('\\'),
- '/' => res.push('/'),
- 'b' => res.push('\x08'),
- 'f' => res.push('\x0c'),
- 'n' => res.push('\n'),
- 'r' => res.push('\r'),
- 't' => res.push('\t'),
- 'u' => match self.decode_hex_escape()? {
- 0xDC00..=0xDFFF => return self.error(LoneLeadingSurrogateInHexEscape),
-
- // Non-BMP characters are encoded as a sequence of
- // two hex escapes, representing UTF-16 surrogates.
- n1 @ 0xD800..=0xDBFF => {
- match (self.next_char(), self.next_char()) {
- (Some('\\'), Some('u')) => (),
- _ => return self.error(UnexpectedEndOfHexEscape),
- }
-
- let n2 = self.decode_hex_escape()?;
- if !(0xDC00..=0xDFFF).contains(&n2) {
- return self.error(LoneLeadingSurrogateInHexEscape);
- }
- let c =
- (u32::from(n1 - 0xD800) << 10 | u32::from(n2 - 0xDC00)) + 0x1_0000;
- res.push(char::from_u32(c).unwrap());
- }
-
- n => match char::from_u32(u32::from(n)) {
- Some(c) => res.push(c),
- None => return self.error(InvalidUnicodeCodePoint),
- },
- },
- _ => return self.error(InvalidEscape),
- }
- escape = false;
- } else if self.ch_is('\\') {
- escape = true;
- } else {
- match self.ch {
- Some('"') => {
- self.bump();
- return Ok(res);
- }
- Some(c) => res.push(c),
- None => unreachable!(),
- }
- }
- }
- }
-
- // Invoked at each iteration, consumes the stream until it has enough
- // information to return a JsonEvent.
- // Manages an internal state so that parsing can be interrupted and resumed.
- // Also keeps track of the position in the logical structure of the json
- // stream isize the form of a stack that can be queried by the user using the
- // stack() method.
- fn parse(&mut self) -> JsonEvent {
- loop {
- // The only paths where the loop can spin a new iteration
- // are in the cases ParseArrayComma and ParseObjectComma if ','
- // is parsed. In these cases the state is set to (respectively)
- // ParseArray(false) and ParseObject(false), which always return,
- // so there is no risk of getting stuck in an infinite loop.
- // All other paths return before the end of the loop's iteration.
- self.parse_whitespace();
-
- match self.state {
- ParseStart => {
- return self.parse_start();
- }
- ParseArray(first) => {
- return self.parse_array(first);
- }
- ParseArrayComma => {
- if let Some(evt) = self.parse_array_comma_or_end() {
- return evt;
- }
- }
- ParseObject(first) => {
- return self.parse_object(first);
- }
- ParseObjectComma => {
- self.stack.pop();
- if self.ch_is(',') {
- self.state = ParseObject(false);
- self.bump();
- } else {
- return self.parse_object_end();
- }
- }
- _ => {
- return self.error_event(InvalidSyntax);
- }
- }
- }
- }
-
- fn parse_start(&mut self) -> JsonEvent {
- let val = self.parse_value();
- self.state = match val {
- Error(_) => ParseFinished,
- ArrayStart => ParseArray(true),
- ObjectStart => ParseObject(true),
- _ => ParseBeforeFinish,
- };
- val
- }
-
- fn parse_array(&mut self, first: bool) -> JsonEvent {
- if self.ch_is(']') {
- if !first {
- self.error_event(InvalidSyntax)
- } else {
- self.state = if self.stack.is_empty() {
- ParseBeforeFinish
- } else if self.stack.last_is_index() {
- ParseArrayComma
- } else {
- ParseObjectComma
- };
- self.bump();
- ArrayEnd
- }
- } else {
- if first {
- self.stack.push_index(0);
- }
- let val = self.parse_value();
- self.state = match val {
- Error(_) => ParseFinished,
- ArrayStart => ParseArray(true),
- ObjectStart => ParseObject(true),
- _ => ParseArrayComma,
- };
- val
- }
- }
-
- fn parse_array_comma_or_end(&mut self) -> Option<JsonEvent> {
- if self.ch_is(',') {
- self.stack.bump_index();
- self.state = ParseArray(false);
- self.bump();
- None
- } else if self.ch_is(']') {
- self.stack.pop();
- self.state = if self.stack.is_empty() {
- ParseBeforeFinish
- } else if self.stack.last_is_index() {
- ParseArrayComma
- } else {
- ParseObjectComma
- };
- self.bump();
- Some(ArrayEnd)
- } else if self.eof() {
- Some(self.error_event(EOFWhileParsingArray))
- } else {
- Some(self.error_event(InvalidSyntax))
- }
- }
-
- fn parse_object(&mut self, first: bool) -> JsonEvent {
- if self.ch_is('}') {
- if !first {
- if self.stack.is_empty() {
- return self.error_event(TrailingComma);
- } else {
- self.stack.pop();
- }
- }
- self.state = if self.stack.is_empty() {
- ParseBeforeFinish
- } else if self.stack.last_is_index() {
- ParseArrayComma
- } else {
- ParseObjectComma
- };
- self.bump();
- return ObjectEnd;
- }
- if self.eof() {
- return self.error_event(EOFWhileParsingObject);
- }
- if !self.ch_is('"') {
- return self.error_event(KeyMustBeAString);
- }
- let s = match self.parse_str() {
- Ok(s) => s,
- Err(e) => {
- self.state = ParseFinished;
- return Error(e);
- }
- };
- self.parse_whitespace();
- if self.eof() {
- return self.error_event(EOFWhileParsingObject);
- } else if self.ch_or_null() != ':' {
- return self.error_event(ExpectedColon);
- }
- self.stack.push_key(s);
- self.bump();
- self.parse_whitespace();
-
- let val = self.parse_value();
-
- self.state = match val {
- Error(_) => ParseFinished,
- ArrayStart => ParseArray(true),
- ObjectStart => ParseObject(true),
- _ => ParseObjectComma,
- };
- val
- }
-
- fn parse_object_end(&mut self) -> JsonEvent {
- if self.ch_is('}') {
- self.state = if self.stack.is_empty() {
- ParseBeforeFinish
- } else if self.stack.last_is_index() {
- ParseArrayComma
- } else {
- ParseObjectComma
- };
- self.bump();
- ObjectEnd
- } else if self.eof() {
- self.error_event(EOFWhileParsingObject)
- } else {
- self.error_event(InvalidSyntax)
- }
- }
-
- fn parse_value(&mut self) -> JsonEvent {
- if self.eof() {
- return self.error_event(EOFWhileParsingValue);
- }
- match self.ch_or_null() {
- 'n' => self.parse_ident("ull", NullValue),
- 't' => self.parse_ident("rue", BooleanValue(true)),
- 'f' => self.parse_ident("alse", BooleanValue(false)),
- '0'..='9' | '-' => self.parse_number(),
- '"' => match self.parse_str() {
- Ok(s) => StringValue(s),
- Err(e) => Error(e),
- },
- '[' => {
- self.bump();
- ArrayStart
- }
- '{' => {
- self.bump();
- ObjectStart
- }
- _ => self.error_event(InvalidSyntax),
- }
- }
-
- fn parse_ident(&mut self, ident: &str, value: JsonEvent) -> JsonEvent {
- if ident.chars().all(|c| Some(c) == self.next_char()) {
- self.bump();
- value
- } else {
- Error(SyntaxError(InvalidSyntax, self.line, self.col))
- }
- }
-
- fn error_event(&mut self, reason: ErrorCode) -> JsonEvent {
- self.state = ParseFinished;
- Error(SyntaxError(reason, self.line, self.col))
- }
-}
-
-/// A Builder consumes a json::Parser to create a generic Json structure.
-pub struct Builder<T> {
- parser: Parser<T>,
- token: Option<JsonEvent>,
-}
-
-impl<T: Iterator<Item = char>> Builder<T> {
- /// Creates a JSON Builder.
- pub fn new(src: T) -> Builder<T> {
- Builder { parser: Parser::new(src), token: None }
- }
-
- // Decode a Json value from a Parser.
- pub fn build(&mut self) -> Result<Json, BuilderError> {
- self.bump();
- let result = self.build_value();
- self.bump();
- match self.token {
- None => {}
- Some(Error(ref e)) => {
- return Err(e.clone());
- }
- ref tok => {
- panic!("unexpected token {:?}", tok.clone());
- }
- }
- result
- }
-
- fn bump(&mut self) {
- self.token = self.parser.next();
- }
-
- fn build_value(&mut self) -> Result<Json, BuilderError> {
- match self.token {
- Some(NullValue) => Ok(Json::Null),
- Some(I64Value(n)) => Ok(Json::I64(n)),
- Some(U64Value(n)) => Ok(Json::U64(n)),
- Some(F64Value(n)) => Ok(Json::F64(n)),
- Some(BooleanValue(b)) => Ok(Json::Boolean(b)),
- Some(StringValue(ref mut s)) => {
- let mut temp = string::String::new();
- swap(s, &mut temp);
- Ok(Json::String(temp))
- }
- Some(Error(ref e)) => Err(e.clone()),
- Some(ArrayStart) => self.build_array(),
- Some(ObjectStart) => self.build_object(),
- Some(ObjectEnd) => self.parser.error(InvalidSyntax),
- Some(ArrayEnd) => self.parser.error(InvalidSyntax),
- None => self.parser.error(EOFWhileParsingValue),
- }
- }
-
- fn build_array(&mut self) -> Result<Json, BuilderError> {
- self.bump();
- let mut values = Vec::new();
-
- loop {
- if self.token == Some(ArrayEnd) {
- return Ok(Json::Array(values.into_iter().collect()));
- }
- match self.build_value() {
- Ok(v) => values.push(v),
- Err(e) => return Err(e),
- }
- self.bump();
- }
- }
-
- fn build_object(&mut self) -> Result<Json, BuilderError> {
- self.bump();
-
- let mut values = BTreeMap::new();
-
- loop {
- match self.token {
- Some(ObjectEnd) => {
- return Ok(Json::Object(values));
- }
- Some(Error(ref e)) => {
- return Err(e.clone());
- }
- None => {
- break;
- }
- _ => {}
- }
- let key = match self.parser.stack().top() {
- Some(StackElement::Key(k)) => k.to_owned(),
- _ => {
- panic!("invalid state");
- }
- };
- match self.build_value() {
- Ok(value) => {
- values.insert(key, value);
- }
- Err(e) => {
- return Err(e);
- }
- }
- self.bump();
- }
- self.parser.error(EOFWhileParsingObject)
- }
-}
-
-/// Decodes a json value from a string
-pub fn from_str(s: &str) -> Result<Json, BuilderError> {
- let mut builder = Builder::new(s.chars());
- builder.build()
-}
-
-/// A trait for converting values to JSON
-pub trait ToJson {
- /// Converts the value of `self` to an instance of JSON
- fn to_json(&self) -> Json;
-}
-
-macro_rules! to_json_impl_i64 {
- ($($t:ty), +) => (
- $(impl ToJson for $t {
- fn to_json(&self) -> Json {
- Json::I64(*self as i64)
- }
- })+
- )
-}
-
-to_json_impl_i64! { isize, i8, i16, i32, i64 }
-
-macro_rules! to_json_impl_u64 {
- ($($t:ty), +) => (
- $(impl ToJson for $t {
- fn to_json(&self) -> Json {
- Json::U64(*self as u64)
- }
- })+
- )
-}
-
-to_json_impl_u64! { usize, u8, u16, u32, u64 }
-
-impl ToJson for Json {
- fn to_json(&self) -> Json {
- self.clone()
- }
-}
-
-impl ToJson for f32 {
- fn to_json(&self) -> Json {
- f64::from(*self).to_json()
- }
-}
-
-impl ToJson for f64 {
- fn to_json(&self) -> Json {
- match self.classify() {
- Fp::Nan | Fp::Infinite => Json::Null,
- _ => Json::F64(*self),
- }
- }
-}
-
-impl ToJson for () {
- fn to_json(&self) -> Json {
- Json::Null
- }
-}
-
-impl ToJson for bool {
- fn to_json(&self) -> Json {
- Json::Boolean(*self)
- }
-}
-
-impl ToJson for str {
- fn to_json(&self) -> Json {
- Json::String(self.to_string())
- }
-}
-
-impl ToJson for string::String {
- fn to_json(&self) -> Json {
- Json::String((*self).clone())
- }
-}
-
-impl<'a> ToJson for Cow<'a, str> {
- fn to_json(&self) -> Json {
- Json::String(self.to_string())
- }
-}
-
-macro_rules! tuple_impl {
- // use variables to indicate the arity of the tuple
- ($($tyvar:ident),* ) => {
- // the trailing commas are for the 1 tuple
- impl<
- $( $tyvar : ToJson ),*
- > ToJson for ( $( $tyvar ),* , ) {
-
- #[inline]
- #[allow(non_snake_case)]
- fn to_json(&self) -> Json {
- match *self {
- ($(ref $tyvar),*,) => Json::Array(vec![$($tyvar.to_json()),*])
- }
- }
- }
- }
-}
-
-tuple_impl! {A}
-tuple_impl! {A, B}
-tuple_impl! {A, B, C}
-tuple_impl! {A, B, C, D}
-tuple_impl! {A, B, C, D, E}
-tuple_impl! {A, B, C, D, E, F}
-tuple_impl! {A, B, C, D, E, F, G}
-tuple_impl! {A, B, C, D, E, F, G, H}
-tuple_impl! {A, B, C, D, E, F, G, H, I}
-tuple_impl! {A, B, C, D, E, F, G, H, I, J}
-tuple_impl! {A, B, C, D, E, F, G, H, I, J, K}
-tuple_impl! {A, B, C, D, E, F, G, H, I, J, K, L}
-
-impl<A: ToJson> ToJson for [A] {
- fn to_json(&self) -> Json {
- Json::Array(self.iter().map(|elt| elt.to_json()).collect())
- }
-}
-
-impl<A: ToJson> ToJson for Vec<A> {
- fn to_json(&self) -> Json {
- Json::Array(self.iter().map(|elt| elt.to_json()).collect())
- }
-}
-
-impl<'a, A: ToJson> ToJson for Cow<'a, [A]>
-where
- [A]: ToOwned,
-{
- fn to_json(&self) -> Json {
- Json::Array(self.iter().map(|elt| elt.to_json()).collect())
- }
-}
-
-impl<T: ToString, A: ToJson> ToJson for BTreeMap<T, A> {
- fn to_json(&self) -> Json {
- let mut d = BTreeMap::new();
- for (key, value) in self {
- d.insert(key.to_string(), value.to_json());
- }
- Json::Object(d)
- }
-}
-
-impl<A: ToJson> ToJson for HashMap<string::String, A> {
- fn to_json(&self) -> Json {
- let mut d = BTreeMap::new();
- for (key, value) in self {
- d.insert((*key).clone(), value.to_json());
- }
- Json::Object(d)
- }
-}
-
-impl<A: ToJson> ToJson for Option<A> {
- fn to_json(&self) -> Json {
- match *self {
- None => Json::Null,
- Some(ref value) => value.to_json(),
- }
- }
-}
-
-struct FormatShim<'a, 'b> {
- inner: &'a mut fmt::Formatter<'b>,
-}
-
-impl<'a, 'b> fmt::Write for FormatShim<'a, 'b> {
- fn write_str(&mut self, s: &str) -> fmt::Result {
- match self.inner.write_str(s) {
- Ok(_) => Ok(()),
- Err(_) => Err(fmt::Error),
- }
- }
-}
-
-impl fmt::Display for Json {
- /// Encodes a json value into a string
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- let mut shim = FormatShim { inner: f };
- let mut encoder = Encoder::new(&mut shim);
- match self.encode(&mut encoder) {
- Ok(_) => Ok(()),
- Err(_) => Err(fmt::Error),
- }
- }
-}
-
-impl<'a> fmt::Display for PrettyJson<'a> {
- /// Encodes a json value into a string
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- let mut shim = FormatShim { inner: f };
- let mut encoder = PrettyEncoder::new(&mut shim);
- match self.inner.encode(&mut encoder) {
- Ok(_) => Ok(()),
- Err(_) => Err(fmt::Error),
- }
- }
-}
-
-impl<'a, T: for<'r> Encodable<Encoder<'r>>> fmt::Display for AsJson<'a, T> {
- /// Encodes a json value into a string
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- let mut shim = FormatShim { inner: f };
- let mut encoder = Encoder::new(&mut shim);
- match self.inner.encode(&mut encoder) {
- Ok(_) => Ok(()),
- Err(_) => Err(fmt::Error),
- }
- }
-}
-
-impl<'a, T> AsPrettyJson<'a, T> {
- /// Sets the indentation level for the emitted JSON
- pub fn indent(mut self, indent: usize) -> AsPrettyJson<'a, T> {
- self.indent = Some(indent);
- self
- }
-}
-
-impl<'a, T: for<'x> Encodable<PrettyEncoder<'x>>> fmt::Display for AsPrettyJson<'a, T> {
- /// Encodes a json value into a string
- fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
- let mut shim = FormatShim { inner: f };
- let mut encoder = PrettyEncoder::new(&mut shim);
- if let Some(n) = self.indent {
- encoder.set_indent(n);
- }
- match self.inner.encode(&mut encoder) {
- Ok(_) => Ok(()),
- Err(_) => Err(fmt::Error),
- }
- }
-}
-
-impl FromStr for Json {
- type Err = BuilderError;
- fn from_str(s: &str) -> Result<Json, BuilderError> {
- from_str(s)
- }
-}
-
-#[cfg(test)]
-mod tests;
+++ /dev/null
-#![allow(rustc::internal)]
-
-use json::ErrorCode::*;
-use json::Json::*;
-use json::JsonEvent::*;
-use json::ParserError::*;
-use json::{from_str, Encoder, EncoderError, Json, JsonEvent, Parser, StackElement};
-use rustc_macros::Encodable;
-use rustc_serialize::json;
-use rustc_serialize::Encodable;
-
-use std::collections::BTreeMap;
-use std::io::prelude::*;
-use std::string;
-use Animal::*;
-
-#[derive(Eq, PartialEq, Debug)]
-struct OptionData {
- opt: Option<usize>,
-}
-
-#[derive(PartialEq, Encodable, Debug)]
-enum Animal {
- Dog,
- Frog(string::String, isize),
-}
-
-#[derive(PartialEq, Encodable, Debug)]
-struct Inner {
- a: (),
- b: usize,
- c: Vec<string::String>,
-}
-
-#[derive(PartialEq, Encodable, Debug)]
-struct Outer {
- inner: Vec<Inner>,
-}
-
-fn mk_object(items: &[(string::String, Json)]) -> Json {
- let mut d = BTreeMap::new();
-
- for item in items {
- match *item {
- (ref key, ref value) => {
- d.insert((*key).clone(), (*value).clone());
- }
- }
- }
-
- Object(d)
-}
-
-#[test]
-fn test_from_str_trait() {
- let s = "null";
- assert!(s.parse::<Json>().unwrap() == s.parse().unwrap());
-}
-
-#[test]
-fn test_write_null() {
- assert_eq!(Null.to_string(), "null");
- assert_eq!(Null.pretty().to_string(), "null");
-}
-
-#[test]
-fn test_write_i64() {
- assert_eq!(U64(0).to_string(), "0");
- assert_eq!(U64(0).pretty().to_string(), "0");
-
- assert_eq!(U64(1234).to_string(), "1234");
- assert_eq!(U64(1234).pretty().to_string(), "1234");
-
- assert_eq!(I64(-5678).to_string(), "-5678");
- assert_eq!(I64(-5678).pretty().to_string(), "-5678");
-
- assert_eq!(U64(7650007200025252000).to_string(), "7650007200025252000");
- assert_eq!(U64(7650007200025252000).pretty().to_string(), "7650007200025252000");
-}
-
-#[test]
-fn test_write_f64() {
- assert_eq!(F64(3.0).to_string(), "3.0");
- assert_eq!(F64(3.0).pretty().to_string(), "3.0");
-
- assert_eq!(F64(3.1).to_string(), "3.1");
- assert_eq!(F64(3.1).pretty().to_string(), "3.1");
-
- assert_eq!(F64(-1.5).to_string(), "-1.5");
- assert_eq!(F64(-1.5).pretty().to_string(), "-1.5");
-
- assert_eq!(F64(0.5).to_string(), "0.5");
- assert_eq!(F64(0.5).pretty().to_string(), "0.5");
-
- assert_eq!(F64(f64::NAN).to_string(), "null");
- assert_eq!(F64(f64::NAN).pretty().to_string(), "null");
-
- assert_eq!(F64(f64::INFINITY).to_string(), "null");
- assert_eq!(F64(f64::INFINITY).pretty().to_string(), "null");
-
- assert_eq!(F64(f64::NEG_INFINITY).to_string(), "null");
- assert_eq!(F64(f64::NEG_INFINITY).pretty().to_string(), "null");
-}
-
-#[test]
-fn test_write_str() {
- assert_eq!(String("".to_string()).to_string(), "\"\"");
- assert_eq!(String("".to_string()).pretty().to_string(), "\"\"");
-
- assert_eq!(String("homura".to_string()).to_string(), "\"homura\"");
- assert_eq!(String("madoka".to_string()).pretty().to_string(), "\"madoka\"");
-}
-
-#[test]
-fn test_write_bool() {
- assert_eq!(Boolean(true).to_string(), "true");
- assert_eq!(Boolean(true).pretty().to_string(), "true");
-
- assert_eq!(Boolean(false).to_string(), "false");
- assert_eq!(Boolean(false).pretty().to_string(), "false");
-}
-
-#[test]
-fn test_write_array() {
- assert_eq!(Array(vec![]).to_string(), "[]");
- assert_eq!(Array(vec![]).pretty().to_string(), "[]");
-
- assert_eq!(Array(vec![Boolean(true)]).to_string(), "[true]");
- assert_eq!(
- Array(vec![Boolean(true)]).pretty().to_string(),
- "\
- [\n \
- true\n\
- ]"
- );
-
- let long_test_array =
- Array(vec![Boolean(false), Null, Array(vec![String("foo\nbar".to_string()), F64(3.5)])]);
-
- assert_eq!(long_test_array.to_string(), "[false,null,[\"foo\\nbar\",3.5]]");
- assert_eq!(
- long_test_array.pretty().to_string(),
- "\
- [\n \
- false,\n \
- null,\n \
- [\n \
- \"foo\\nbar\",\n \
- 3.5\n \
- ]\n\
- ]"
- );
-}
-
-#[test]
-fn test_write_object() {
- assert_eq!(mk_object(&[]).to_string(), "{}");
- assert_eq!(mk_object(&[]).pretty().to_string(), "{}");
-
- assert_eq!(mk_object(&[("a".to_string(), Boolean(true))]).to_string(), "{\"a\":true}");
- assert_eq!(
- mk_object(&[("a".to_string(), Boolean(true))]).pretty().to_string(),
- "\
- {\n \
- \"a\": true\n\
- }"
- );
-
- let complex_obj = mk_object(&[(
- "b".to_string(),
- Array(vec![
- mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
- mk_object(&[("d".to_string(), String("".to_string()))]),
- ]),
- )]);
-
- assert_eq!(
- complex_obj.to_string(),
- "{\
- \"b\":[\
- {\"c\":\"\\f\\r\"},\
- {\"d\":\"\"}\
- ]\
- }"
- );
- assert_eq!(
- complex_obj.pretty().to_string(),
- "\
- {\n \
- \"b\": [\n \
- {\n \
- \"c\": \"\\f\\r\"\n \
- },\n \
- {\n \
- \"d\": \"\"\n \
- }\n \
- ]\n\
- }"
- );
-
- let a = mk_object(&[
- ("a".to_string(), Boolean(true)),
- (
- "b".to_string(),
- Array(vec![
- mk_object(&[("c".to_string(), String("\x0c\r".to_string()))]),
- mk_object(&[("d".to_string(), String("".to_string()))]),
- ]),
- ),
- ]);
-
- // We can't compare the strings directly because the object fields be
- // printed in a different order.
- assert_eq!(a.clone(), a.to_string().parse().unwrap());
- assert_eq!(a.clone(), a.pretty().to_string().parse().unwrap());
-}
-
-#[test]
-fn test_write_enum() {
- let animal = Dog;
- assert_eq!(json::as_json(&animal).to_string(), "\"Dog\"");
- assert_eq!(json::as_pretty_json(&animal).to_string(), "\"Dog\"");
-
- let animal = Frog("Henry".to_string(), 349);
- assert_eq!(
- json::as_json(&animal).to_string(),
- "{\"variant\":\"Frog\",\"fields\":[\"Henry\",349]}"
- );
- assert_eq!(
- json::as_pretty_json(&animal).to_string(),
- "{\n \
- \"variant\": \"Frog\",\n \
- \"fields\": [\n \
- \"Henry\",\n \
- 349\n \
- ]\n\
- }"
- );
-}
-
-macro_rules! check_encoder_for_simple {
- ($value:expr, $expected:expr) => {{
- let s = json::as_json(&$value).to_string();
- assert_eq!(s, $expected);
-
- let s = json::as_pretty_json(&$value).to_string();
- assert_eq!(s, $expected);
- }};
-}
-
-#[test]
-fn test_write_some() {
- check_encoder_for_simple!(Some("jodhpurs".to_string()), "\"jodhpurs\"");
-}
-
-#[test]
-fn test_write_none() {
- check_encoder_for_simple!(None::<string::String>, "null");
-}
-
-#[test]
-fn test_write_char() {
- check_encoder_for_simple!('a', "\"a\"");
- check_encoder_for_simple!('\t', "\"\\t\"");
- check_encoder_for_simple!('\u{0000}', "\"\\u0000\"");
- check_encoder_for_simple!('\u{001b}', "\"\\u001b\"");
- check_encoder_for_simple!('\u{007f}', "\"\\u007f\"");
- check_encoder_for_simple!('\u{00a0}', "\"\u{00a0}\"");
- check_encoder_for_simple!('\u{abcd}', "\"\u{abcd}\"");
- check_encoder_for_simple!('\u{10ffff}', "\"\u{10ffff}\"");
-}
-
-#[test]
-fn test_trailing_characters() {
- assert_eq!(from_str("nulla"), Err(SyntaxError(TrailingCharacters, 1, 5)));
- assert_eq!(from_str("truea"), Err(SyntaxError(TrailingCharacters, 1, 5)));
- assert_eq!(from_str("falsea"), Err(SyntaxError(TrailingCharacters, 1, 6)));
- assert_eq!(from_str("1a"), Err(SyntaxError(TrailingCharacters, 1, 2)));
- assert_eq!(from_str("[]a"), Err(SyntaxError(TrailingCharacters, 1, 3)));
- assert_eq!(from_str("{}a"), Err(SyntaxError(TrailingCharacters, 1, 3)));
-}
-
-#[test]
-fn test_read_identifiers() {
- assert_eq!(from_str("n"), Err(SyntaxError(InvalidSyntax, 1, 2)));
- assert_eq!(from_str("nul"), Err(SyntaxError(InvalidSyntax, 1, 4)));
- assert_eq!(from_str("t"), Err(SyntaxError(InvalidSyntax, 1, 2)));
- assert_eq!(from_str("truz"), Err(SyntaxError(InvalidSyntax, 1, 4)));
- assert_eq!(from_str("f"), Err(SyntaxError(InvalidSyntax, 1, 2)));
- assert_eq!(from_str("faz"), Err(SyntaxError(InvalidSyntax, 1, 3)));
-
- assert_eq!(from_str("null"), Ok(Null));
- assert_eq!(from_str("true"), Ok(Boolean(true)));
- assert_eq!(from_str("false"), Ok(Boolean(false)));
- assert_eq!(from_str(" null "), Ok(Null));
- assert_eq!(from_str(" true "), Ok(Boolean(true)));
- assert_eq!(from_str(" false "), Ok(Boolean(false)));
-}
-
-#[test]
-fn test_read_number() {
- assert_eq!(from_str("+"), Err(SyntaxError(InvalidSyntax, 1, 1)));
- assert_eq!(from_str("."), Err(SyntaxError(InvalidSyntax, 1, 1)));
- assert_eq!(from_str("NaN"), Err(SyntaxError(InvalidSyntax, 1, 1)));
- assert_eq!(from_str("-"), Err(SyntaxError(InvalidNumber, 1, 2)));
- assert_eq!(from_str("00"), Err(SyntaxError(InvalidNumber, 1, 2)));
- assert_eq!(from_str("1."), Err(SyntaxError(InvalidNumber, 1, 3)));
- assert_eq!(from_str("1e"), Err(SyntaxError(InvalidNumber, 1, 3)));
- assert_eq!(from_str("1e+"), Err(SyntaxError(InvalidNumber, 1, 4)));
-
- assert_eq!(from_str("18446744073709551616"), Err(SyntaxError(InvalidNumber, 1, 20)));
- assert_eq!(from_str("-9223372036854775809"), Err(SyntaxError(InvalidNumber, 1, 21)));
-
- assert_eq!(from_str("3"), Ok(U64(3)));
- assert_eq!(from_str("3.1"), Ok(F64(3.1)));
- assert_eq!(from_str("-1.2"), Ok(F64(-1.2)));
- assert_eq!(from_str("0.4"), Ok(F64(0.4)));
- assert_eq!(from_str("0.4e5"), Ok(F64(0.4e5)));
- assert_eq!(from_str("0.4e+15"), Ok(F64(0.4e15)));
- assert_eq!(from_str("0.4e-01"), Ok(F64(0.4e-01)));
- assert_eq!(from_str(" 3 "), Ok(U64(3)));
-
- assert_eq!(from_str("-9223372036854775808"), Ok(I64(i64::MIN)));
- assert_eq!(from_str("9223372036854775807"), Ok(U64(i64::MAX as u64)));
- assert_eq!(from_str("18446744073709551615"), Ok(U64(u64::MAX)));
-}
-
-#[test]
-fn test_read_str() {
- assert_eq!(from_str("\""), Err(SyntaxError(EOFWhileParsingString, 1, 2)));
- assert_eq!(from_str("\"lol"), Err(SyntaxError(EOFWhileParsingString, 1, 5)));
-
- assert_eq!(from_str("\"\""), Ok(String("".to_string())));
- assert_eq!(from_str("\"foo\""), Ok(String("foo".to_string())));
- assert_eq!(from_str("\"\\\"\""), Ok(String("\"".to_string())));
- assert_eq!(from_str("\"\\b\""), Ok(String("\x08".to_string())));
- assert_eq!(from_str("\"\\n\""), Ok(String("\n".to_string())));
- assert_eq!(from_str("\"\\r\""), Ok(String("\r".to_string())));
- assert_eq!(from_str("\"\\t\""), Ok(String("\t".to_string())));
- assert_eq!(from_str(" \"foo\" "), Ok(String("foo".to_string())));
- assert_eq!(from_str("\"\\u12ab\""), Ok(String("\u{12ab}".to_string())));
- assert_eq!(from_str("\"\\uAB12\""), Ok(String("\u{AB12}".to_string())));
-}
-
-#[test]
-fn test_read_array() {
- assert_eq!(from_str("["), Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
- assert_eq!(from_str("[1"), Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
- assert_eq!(from_str("[1,"), Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
- assert_eq!(from_str("[1,]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
- assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
-
- assert_eq!(from_str("[]"), Ok(Array(vec![])));
- assert_eq!(from_str("[ ]"), Ok(Array(vec![])));
- assert_eq!(from_str("[true]"), Ok(Array(vec![Boolean(true)])));
- assert_eq!(from_str("[ false ]"), Ok(Array(vec![Boolean(false)])));
- assert_eq!(from_str("[null]"), Ok(Array(vec![Null])));
- assert_eq!(from_str("[3, 1]"), Ok(Array(vec![U64(3), U64(1)])));
- assert_eq!(from_str("\n[3, 2]\n"), Ok(Array(vec![U64(3), U64(2)])));
- assert_eq!(from_str("[2, [4, 1]]"), Ok(Array(vec![U64(2), Array(vec![U64(4), U64(1)])])));
-}
-
-#[test]
-fn test_read_object() {
- assert_eq!(from_str("{"), Err(SyntaxError(EOFWhileParsingObject, 1, 2)));
- assert_eq!(from_str("{ "), Err(SyntaxError(EOFWhileParsingObject, 1, 3)));
- assert_eq!(from_str("{1"), Err(SyntaxError(KeyMustBeAString, 1, 2)));
- assert_eq!(from_str("{ \"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
- assert_eq!(from_str("{\"a\""), Err(SyntaxError(EOFWhileParsingObject, 1, 5)));
- assert_eq!(from_str("{\"a\" "), Err(SyntaxError(EOFWhileParsingObject, 1, 6)));
-
- assert_eq!(from_str("{\"a\" 1"), Err(SyntaxError(ExpectedColon, 1, 6)));
- assert_eq!(from_str("{\"a\":"), Err(SyntaxError(EOFWhileParsingValue, 1, 6)));
- assert_eq!(from_str("{\"a\":1"), Err(SyntaxError(EOFWhileParsingObject, 1, 7)));
- assert_eq!(from_str("{\"a\":1 1"), Err(SyntaxError(InvalidSyntax, 1, 8)));
- assert_eq!(from_str("{\"a\":1,"), Err(SyntaxError(EOFWhileParsingObject, 1, 8)));
-
- assert_eq!(from_str("{}").unwrap(), mk_object(&[]));
- assert_eq!(from_str("{\"a\": 3}").unwrap(), mk_object(&[("a".to_string(), U64(3))]));
-
- assert_eq!(
- from_str("{ \"a\": null, \"b\" : true }").unwrap(),
- mk_object(&[("a".to_string(), Null), ("b".to_string(), Boolean(true))])
- );
- assert_eq!(
- from_str("\n{ \"a\": null, \"b\" : true }\n").unwrap(),
- mk_object(&[("a".to_string(), Null), ("b".to_string(), Boolean(true))])
- );
- assert_eq!(
- from_str("{\"a\" : 1.0 ,\"b\": [ true ]}").unwrap(),
- mk_object(&[("a".to_string(), F64(1.0)), ("b".to_string(), Array(vec![Boolean(true)]))])
- );
- assert_eq!(
- from_str(
- "{\
- \"a\": 1.0, \
- \"b\": [\
- true,\
- \"foo\\nbar\", \
- { \"c\": {\"d\": null} } \
- ]\
- }"
- )
- .unwrap(),
- mk_object(&[
- ("a".to_string(), F64(1.0)),
- (
- "b".to_string(),
- Array(vec![
- Boolean(true),
- String("foo\nbar".to_string()),
- mk_object(&[("c".to_string(), mk_object(&[("d".to_string(), Null)]))])
- ])
- )
- ])
- );
-}
-
-#[test]
-fn test_multiline_errors() {
- assert_eq!(from_str("{\n \"foo\":\n \"bar\""), Err(SyntaxError(EOFWhileParsingObject, 3, 8)));
-}
-
-#[test]
-fn test_find() {
- let json_value = from_str("{\"dog\" : \"cat\"}").unwrap();
- let found_str = json_value.find("dog");
- assert!(found_str.unwrap().as_string().unwrap() == "cat");
-}
-
-#[test]
-fn test_find_path() {
- let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
- let found_str = json_value.find_path(&["dog", "cat", "mouse"]);
- assert!(found_str.unwrap().as_string().unwrap() == "cheese");
-}
-
-#[test]
-fn test_search() {
- let json_value = from_str("{\"dog\":{\"cat\": {\"mouse\" : \"cheese\"}}}").unwrap();
- let found_str = json_value.search("mouse").and_then(|j| j.as_string());
- assert!(found_str.unwrap() == "cheese");
-}
-
-#[test]
-fn test_index() {
- let json_value = from_str("{\"animals\":[\"dog\",\"cat\",\"mouse\"]}").unwrap();
- let ref array = json_value["animals"];
- assert_eq!(array[0].as_string().unwrap(), "dog");
- assert_eq!(array[1].as_string().unwrap(), "cat");
- assert_eq!(array[2].as_string().unwrap(), "mouse");
-}
-
-#[test]
-fn test_is_object() {
- let json_value = from_str("{}").unwrap();
- assert!(json_value.is_object());
-}
-
-#[test]
-fn test_as_object() {
- let json_value = from_str("{}").unwrap();
- let json_object = json_value.as_object();
- assert!(json_object.is_some());
-}
-
-#[test]
-fn test_is_array() {
- let json_value = from_str("[1, 2, 3]").unwrap();
- assert!(json_value.is_array());
-}
-
-#[test]
-fn test_as_array() {
- let json_value = from_str("[1, 2, 3]").unwrap();
- let json_array = json_value.as_array();
- let expected_length = 3;
- assert!(json_array.is_some() && json_array.unwrap().len() == expected_length);
-}
-
-#[test]
-fn test_is_string() {
- let json_value = from_str("\"dog\"").unwrap();
- assert!(json_value.is_string());
-}
-
-#[test]
-fn test_as_string() {
- let json_value = from_str("\"dog\"").unwrap();
- let json_str = json_value.as_string();
- let expected_str = "dog";
- assert_eq!(json_str, Some(expected_str));
-}
-
-#[test]
-fn test_is_number() {
- let json_value = from_str("12").unwrap();
- assert!(json_value.is_number());
-}
-
-#[test]
-fn test_is_i64() {
- let json_value = from_str("-12").unwrap();
- assert!(json_value.is_i64());
-
- let json_value = from_str("12").unwrap();
- assert!(!json_value.is_i64());
-
- let json_value = from_str("12.0").unwrap();
- assert!(!json_value.is_i64());
-}
-
-#[test]
-fn test_is_u64() {
- let json_value = from_str("12").unwrap();
- assert!(json_value.is_u64());
-
- let json_value = from_str("-12").unwrap();
- assert!(!json_value.is_u64());
-
- let json_value = from_str("12.0").unwrap();
- assert!(!json_value.is_u64());
-}
-
-#[test]
-fn test_is_f64() {
- let json_value = from_str("12").unwrap();
- assert!(!json_value.is_f64());
-
- let json_value = from_str("-12").unwrap();
- assert!(!json_value.is_f64());
-
- let json_value = from_str("12.0").unwrap();
- assert!(json_value.is_f64());
-
- let json_value = from_str("-12.0").unwrap();
- assert!(json_value.is_f64());
-}
-
-#[test]
-fn test_as_i64() {
- let json_value = from_str("-12").unwrap();
- let json_num = json_value.as_i64();
- assert_eq!(json_num, Some(-12));
-}
-
-#[test]
-fn test_as_u64() {
- let json_value = from_str("12").unwrap();
- let json_num = json_value.as_u64();
- assert_eq!(json_num, Some(12));
-}
-
-#[test]
-fn test_as_f64() {
- let json_value = from_str("12.0").unwrap();
- let json_num = json_value.as_f64();
- assert_eq!(json_num, Some(12f64));
-}
-
-#[test]
-fn test_is_boolean() {
- let json_value = from_str("false").unwrap();
- assert!(json_value.is_boolean());
-}
-
-#[test]
-fn test_as_boolean() {
- let json_value = from_str("false").unwrap();
- let json_bool = json_value.as_boolean();
- let expected_bool = false;
- assert!(json_bool.is_some() && json_bool.unwrap() == expected_bool);
-}
-
-#[test]
-fn test_is_null() {
- let json_value = from_str("null").unwrap();
- assert!(json_value.is_null());
-}
-
-#[test]
-fn test_as_null() {
- let json_value = from_str("null").unwrap();
- let json_null = json_value.as_null();
- let expected_null = ();
- assert!(json_null.is_some() && json_null.unwrap() == expected_null);
-}
-
-#[test]
-fn test_encode_hashmap_with_numeric_key() {
- use std::collections::HashMap;
- use std::str::from_utf8;
- let mut hm: HashMap<usize, bool> = HashMap::new();
- hm.insert(1, true);
- let mut mem_buf = Vec::new();
- write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
- let json_str = from_utf8(&mem_buf[..]).unwrap();
- match from_str(json_str) {
- Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
- _ => {} // it parsed and we are good to go
- }
-}
-
-#[test]
-fn test_prettyencode_hashmap_with_numeric_key() {
- use std::collections::HashMap;
- use std::str::from_utf8;
- let mut hm: HashMap<usize, bool> = HashMap::new();
- hm.insert(1, true);
- let mut mem_buf = Vec::new();
- write!(&mut mem_buf, "{}", json::as_pretty_json(&hm)).unwrap();
- let json_str = from_utf8(&mem_buf[..]).unwrap();
- match from_str(json_str) {
- Err(_) => panic!("Unable to parse json_str: {:?}", json_str),
- _ => {} // it parsed and we are good to go
- }
-}
-
-#[test]
-fn test_prettyencoder_indent_level_param() {
- use std::collections::BTreeMap;
- use std::str::from_utf8;
-
- let mut tree = BTreeMap::new();
-
- tree.insert("hello".to_string(), String("guten tag".to_string()));
- tree.insert("goodbye".to_string(), String("sayonara".to_string()));
-
- let json = Array(
- // The following layout below should look a lot like
- // the pretty-printed JSON (indent * x)
- vec![
- // 0x
- String("greetings".to_string()), // 1x
- Object(tree), // 1x + 2x + 2x + 1x
- ], // 0x
- // End JSON array (7 lines)
- );
-
- // Helper function for counting indents
- fn indents(source: &str) -> usize {
- let trimmed = source.trim_start_matches(' ');
- source.len() - trimmed.len()
- }
-
- // Test up to 4 spaces of indents (more?)
- for i in 0..4 {
- let mut writer = Vec::new();
- write!(&mut writer, "{}", json::as_pretty_json(&json).indent(i)).unwrap();
-
- let printed = from_utf8(&writer[..]).unwrap();
-
- // Check for indents at each line
- let lines: Vec<&str> = printed.lines().collect();
- assert_eq!(lines.len(), 7); // JSON should be 7 lines
-
- assert_eq!(indents(lines[0]), 0 * i); // [
- assert_eq!(indents(lines[1]), 1 * i); // "greetings",
- assert_eq!(indents(lines[2]), 1 * i); // {
- assert_eq!(indents(lines[3]), 2 * i); // "hello": "guten tag",
- assert_eq!(indents(lines[4]), 2 * i); // "goodbye": "sayonara"
- assert_eq!(indents(lines[5]), 1 * i); // },
- assert_eq!(indents(lines[6]), 0 * i); // ]
-
- // Finally, test that the pretty-printed JSON is valid
- from_str(printed).ok().expect("Pretty-printed JSON is invalid!");
- }
-}
-
-#[test]
-fn test_hashmap_with_enum_key() {
- use std::collections::HashMap;
- #[derive(Encodable, Eq, Hash, PartialEq, Debug)]
- enum Enum {
- Foo,
- #[allow(dead_code)]
- Bar,
- }
- let mut map = HashMap::new();
- map.insert(Enum::Foo, 0);
- let result = json::encode(&map).unwrap();
- assert_eq!(&result[..], r#"{"Foo":0}"#);
-}
-
-fn assert_stream_equal(src: &str, expected: Vec<(JsonEvent, Vec<StackElement<'_>>)>) {
- let mut parser = Parser::new(src.chars());
- let mut i = 0;
- loop {
- let evt = match parser.next() {
- Some(e) => e,
- None => {
- break;
- }
- };
- let (ref expected_evt, ref expected_stack) = expected[i];
- if !parser.stack().is_equal_to(expected_stack) {
- panic!("Parser stack is not equal to {:?}", expected_stack);
- }
- assert_eq!(&evt, expected_evt);
- i += 1;
- }
-}
-#[test]
-fn test_streaming_parser() {
- assert_stream_equal(
- r#"{ "foo":"bar", "array" : [0, 1, 2, 3, 4, 5], "idents":[null,true,false]}"#,
- vec![
- (ObjectStart, vec![]),
- (StringValue("bar".to_string()), vec![StackElement::Key("foo")]),
- (ArrayStart, vec![StackElement::Key("array")]),
- (U64Value(0), vec![StackElement::Key("array"), StackElement::Index(0)]),
- (U64Value(1), vec![StackElement::Key("array"), StackElement::Index(1)]),
- (U64Value(2), vec![StackElement::Key("array"), StackElement::Index(2)]),
- (U64Value(3), vec![StackElement::Key("array"), StackElement::Index(3)]),
- (U64Value(4), vec![StackElement::Key("array"), StackElement::Index(4)]),
- (U64Value(5), vec![StackElement::Key("array"), StackElement::Index(5)]),
- (ArrayEnd, vec![StackElement::Key("array")]),
- (ArrayStart, vec![StackElement::Key("idents")]),
- (NullValue, vec![StackElement::Key("idents"), StackElement::Index(0)]),
- (BooleanValue(true), vec![StackElement::Key("idents"), StackElement::Index(1)]),
- (BooleanValue(false), vec![StackElement::Key("idents"), StackElement::Index(2)]),
- (ArrayEnd, vec![StackElement::Key("idents")]),
- (ObjectEnd, vec![]),
- ],
- );
-}
-fn last_event(src: &str) -> JsonEvent {
- let mut parser = Parser::new(src.chars());
- let mut evt = NullValue;
- loop {
- evt = match parser.next() {
- Some(e) => e,
- None => return evt,
- }
- }
-}
-
-#[test]
-fn test_read_object_streaming() {
- assert_eq!(last_event("{ "), Error(SyntaxError(EOFWhileParsingObject, 1, 3)));
- assert_eq!(last_event("{1"), Error(SyntaxError(KeyMustBeAString, 1, 2)));
- assert_eq!(last_event("{ \"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
- assert_eq!(last_event("{\"a\""), Error(SyntaxError(EOFWhileParsingObject, 1, 5)));
- assert_eq!(last_event("{\"a\" "), Error(SyntaxError(EOFWhileParsingObject, 1, 6)));
-
- assert_eq!(last_event("{\"a\" 1"), Error(SyntaxError(ExpectedColon, 1, 6)));
- assert_eq!(last_event("{\"a\":"), Error(SyntaxError(EOFWhileParsingValue, 1, 6)));
- assert_eq!(last_event("{\"a\":1"), Error(SyntaxError(EOFWhileParsingObject, 1, 7)));
- assert_eq!(last_event("{\"a\":1 1"), Error(SyntaxError(InvalidSyntax, 1, 8)));
- assert_eq!(last_event("{\"a\":1,"), Error(SyntaxError(EOFWhileParsingObject, 1, 8)));
- assert_eq!(last_event("{\"a\":1,}"), Error(SyntaxError(TrailingComma, 1, 8)));
-
- assert_stream_equal("{}", vec![(ObjectStart, vec![]), (ObjectEnd, vec![])]);
- assert_stream_equal(
- "{\"a\": 3}",
- vec![
- (ObjectStart, vec![]),
- (U64Value(3), vec![StackElement::Key("a")]),
- (ObjectEnd, vec![]),
- ],
- );
- assert_stream_equal(
- "{ \"a\": null, \"b\" : true }",
- vec![
- (ObjectStart, vec![]),
- (NullValue, vec![StackElement::Key("a")]),
- (BooleanValue(true), vec![StackElement::Key("b")]),
- (ObjectEnd, vec![]),
- ],
- );
- assert_stream_equal(
- "{\"a\" : 1.0 ,\"b\": [ true ]}",
- vec![
- (ObjectStart, vec![]),
- (F64Value(1.0), vec![StackElement::Key("a")]),
- (ArrayStart, vec![StackElement::Key("b")]),
- (BooleanValue(true), vec![StackElement::Key("b"), StackElement::Index(0)]),
- (ArrayEnd, vec![StackElement::Key("b")]),
- (ObjectEnd, vec![]),
- ],
- );
- assert_stream_equal(
- r#"{
- "a": 1.0,
- "b": [
- true,
- "foo\nbar",
- { "c": {"d": null} }
- ]
- }"#,
- vec![
- (ObjectStart, vec![]),
- (F64Value(1.0), vec![StackElement::Key("a")]),
- (ArrayStart, vec![StackElement::Key("b")]),
- (BooleanValue(true), vec![StackElement::Key("b"), StackElement::Index(0)]),
- (
- StringValue("foo\nbar".to_string()),
- vec![StackElement::Key("b"), StackElement::Index(1)],
- ),
- (ObjectStart, vec![StackElement::Key("b"), StackElement::Index(2)]),
- (
- ObjectStart,
- vec![StackElement::Key("b"), StackElement::Index(2), StackElement::Key("c")],
- ),
- (
- NullValue,
- vec![
- StackElement::Key("b"),
- StackElement::Index(2),
- StackElement::Key("c"),
- StackElement::Key("d"),
- ],
- ),
- (
- ObjectEnd,
- vec![StackElement::Key("b"), StackElement::Index(2), StackElement::Key("c")],
- ),
- (ObjectEnd, vec![StackElement::Key("b"), StackElement::Index(2)]),
- (ArrayEnd, vec![StackElement::Key("b")]),
- (ObjectEnd, vec![]),
- ],
- );
-}
-#[test]
-fn test_read_array_streaming() {
- assert_stream_equal("[]", vec![(ArrayStart, vec![]), (ArrayEnd, vec![])]);
- assert_stream_equal("[ ]", vec![(ArrayStart, vec![]), (ArrayEnd, vec![])]);
- assert_stream_equal(
- "[true]",
- vec![
- (ArrayStart, vec![]),
- (BooleanValue(true), vec![StackElement::Index(0)]),
- (ArrayEnd, vec![]),
- ],
- );
- assert_stream_equal(
- "[ false ]",
- vec![
- (ArrayStart, vec![]),
- (BooleanValue(false), vec![StackElement::Index(0)]),
- (ArrayEnd, vec![]),
- ],
- );
- assert_stream_equal(
- "[null]",
- vec![(ArrayStart, vec![]), (NullValue, vec![StackElement::Index(0)]), (ArrayEnd, vec![])],
- );
- assert_stream_equal(
- "[3, 1]",
- vec![
- (ArrayStart, vec![]),
- (U64Value(3), vec![StackElement::Index(0)]),
- (U64Value(1), vec![StackElement::Index(1)]),
- (ArrayEnd, vec![]),
- ],
- );
- assert_stream_equal(
- "\n[3, 2]\n",
- vec![
- (ArrayStart, vec![]),
- (U64Value(3), vec![StackElement::Index(0)]),
- (U64Value(2), vec![StackElement::Index(1)]),
- (ArrayEnd, vec![]),
- ],
- );
- assert_stream_equal(
- "[2, [4, 1]]",
- vec![
- (ArrayStart, vec![]),
- (U64Value(2), vec![StackElement::Index(0)]),
- (ArrayStart, vec![StackElement::Index(1)]),
- (U64Value(4), vec![StackElement::Index(1), StackElement::Index(0)]),
- (U64Value(1), vec![StackElement::Index(1), StackElement::Index(1)]),
- (ArrayEnd, vec![StackElement::Index(1)]),
- (ArrayEnd, vec![]),
- ],
- );
-
- assert_eq!(last_event("["), Error(SyntaxError(EOFWhileParsingValue, 1, 2)));
-
- assert_eq!(from_str("["), Err(SyntaxError(EOFWhileParsingValue, 1, 2)));
- assert_eq!(from_str("[1"), Err(SyntaxError(EOFWhileParsingArray, 1, 3)));
- assert_eq!(from_str("[1,"), Err(SyntaxError(EOFWhileParsingValue, 1, 4)));
- assert_eq!(from_str("[1,]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
- assert_eq!(from_str("[6 7]"), Err(SyntaxError(InvalidSyntax, 1, 4)));
-}
-#[test]
-fn test_trailing_characters_streaming() {
- assert_eq!(last_event("nulla"), Error(SyntaxError(TrailingCharacters, 1, 5)));
- assert_eq!(last_event("truea"), Error(SyntaxError(TrailingCharacters, 1, 5)));
- assert_eq!(last_event("falsea"), Error(SyntaxError(TrailingCharacters, 1, 6)));
- assert_eq!(last_event("1a"), Error(SyntaxError(TrailingCharacters, 1, 2)));
- assert_eq!(last_event("[]a"), Error(SyntaxError(TrailingCharacters, 1, 3)));
- assert_eq!(last_event("{}a"), Error(SyntaxError(TrailingCharacters, 1, 3)));
-}
-#[test]
-fn test_read_identifiers_streaming() {
- assert_eq!(Parser::new("null".chars()).next(), Some(NullValue));
- assert_eq!(Parser::new("true".chars()).next(), Some(BooleanValue(true)));
- assert_eq!(Parser::new("false".chars()).next(), Some(BooleanValue(false)));
-
- assert_eq!(last_event("n"), Error(SyntaxError(InvalidSyntax, 1, 2)));
- assert_eq!(last_event("nul"), Error(SyntaxError(InvalidSyntax, 1, 4)));
- assert_eq!(last_event("t"), Error(SyntaxError(InvalidSyntax, 1, 2)));
- assert_eq!(last_event("truz"), Error(SyntaxError(InvalidSyntax, 1, 4)));
- assert_eq!(last_event("f"), Error(SyntaxError(InvalidSyntax, 1, 2)));
- assert_eq!(last_event("faz"), Error(SyntaxError(InvalidSyntax, 1, 3)));
-}
-
-#[test]
-fn test_to_json() {
- use json::ToJson;
- use std::collections::{BTreeMap, HashMap};
-
- let array2 = Array(vec![U64(1), U64(2)]);
- let array3 = Array(vec![U64(1), U64(2), U64(3)]);
- let object = {
- let mut tree_map = BTreeMap::new();
- tree_map.insert("a".to_string(), U64(1));
- tree_map.insert("b".to_string(), U64(2));
- Object(tree_map)
- };
-
- assert_eq!(array2.to_json(), array2);
- assert_eq!(object.to_json(), object);
- assert_eq!(3_isize.to_json(), I64(3));
- assert_eq!(4_i8.to_json(), I64(4));
- assert_eq!(5_i16.to_json(), I64(5));
- assert_eq!(6_i32.to_json(), I64(6));
- assert_eq!(7_i64.to_json(), I64(7));
- assert_eq!(8_usize.to_json(), U64(8));
- assert_eq!(9_u8.to_json(), U64(9));
- assert_eq!(10_u16.to_json(), U64(10));
- assert_eq!(11_u32.to_json(), U64(11));
- assert_eq!(12_u64.to_json(), U64(12));
- assert_eq!(13.0_f32.to_json(), F64(13.0_f64));
- assert_eq!(14.0_f64.to_json(), F64(14.0_f64));
- assert_eq!(().to_json(), Null);
- assert_eq!(f32::INFINITY.to_json(), Null);
- assert_eq!(f64::NAN.to_json(), Null);
- assert_eq!(true.to_json(), Boolean(true));
- assert_eq!(false.to_json(), Boolean(false));
- assert_eq!("abc".to_json(), String("abc".to_string()));
- assert_eq!("abc".to_string().to_json(), String("abc".to_string()));
- assert_eq!((1_usize, 2_usize).to_json(), array2);
- assert_eq!((1_usize, 2_usize, 3_usize).to_json(), array3);
- assert_eq!([1_usize, 2_usize].to_json(), array2);
- assert_eq!((&[1_usize, 2_usize, 3_usize]).to_json(), array3);
- assert_eq!((vec![1_usize, 2_usize]).to_json(), array2);
- assert_eq!(vec![1_usize, 2_usize, 3_usize].to_json(), array3);
- let mut tree_map = BTreeMap::new();
- tree_map.insert("a".to_string(), 1 as usize);
- tree_map.insert("b".to_string(), 2);
- assert_eq!(tree_map.to_json(), object);
- let mut hash_map = HashMap::new();
- hash_map.insert("a".to_string(), 1 as usize);
- hash_map.insert("b".to_string(), 2);
- assert_eq!(hash_map.to_json(), object);
- assert_eq!(Some(15).to_json(), I64(15));
- assert_eq!(Some(15 as usize).to_json(), U64(15));
- assert_eq!(None::<isize>.to_json(), Null);
-}
-
-#[test]
-fn test_encode_hashmap_with_arbitrary_key() {
- use std::collections::HashMap;
- #[derive(PartialEq, Eq, Hash, Encodable)]
- struct ArbitraryType(usize);
- let mut hm: HashMap<ArbitraryType, bool> = HashMap::new();
- hm.insert(ArbitraryType(1), true);
- let mut mem_buf = string::String::new();
- let mut encoder = Encoder::new(&mut mem_buf);
- let result = hm.encode(&mut encoder);
- match result.unwrap_err() {
- EncoderError::BadHashmapKey => (),
- _ => panic!("expected bad hash map key"),
- }
-}
projects / rust.git / commitdiff