1 // Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! The Rust parser and macro expander.
15 //! This API is completely unstable and subject to change.
17 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
18 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
19 html_root_url = "https://doc.rust-lang.org/nightly/",
20 test(attr(deny(warnings))))]
24 #![feature(rustc_diagnostic_macros)]
25 #![cfg_attr(stage0, feature(match_default_bindings))]
26 #![feature(non_exhaustive)]
27 #![cfg_attr(stage0, feature(i128_type))]
28 #![feature(const_atomic_usize_new)]
29 #![feature(rustc_attrs)]
31 // See librustc_cratesio_shim/Cargo.toml for a comment explaining this.
32 #[allow(unused_extern_crates)]
33 extern crate rustc_cratesio_shim;
35 #[macro_use] extern crate bitflags;
36 extern crate serialize;
37 #[macro_use] extern crate log;
38 extern crate std_unicode;
39 pub extern crate rustc_errors as errors;
40 extern crate syntax_pos;
41 extern crate rustc_data_structures;
42 #[macro_use] extern crate scoped_tls;
44 extern crate serialize as rustc_serialize; // used by deriving
46 use rustc_data_structures::sync::Lock;
48 // A variant of 'try!' that panics on an Err. This is used as a crutch on the
49 // way towards a non-panic!-prone parser. It should be used for fatal parsing
50 // errors; eventually we plan to convert all code using panictry to just use
52 // Exported for syntax_ext, not meant for general use.
54 macro_rules! panictry {
56 use std::result::Result::{Ok, Err};
57 use errors::FatalError;
69 macro_rules! unwrap_or {
70 ($opt:expr, $default:expr) => {
79 used_attrs: Lock<Vec<u64>>,
80 known_attrs: Lock<Vec<u64>>,
81 syntax_pos_globals: syntax_pos::Globals,
87 used_attrs: Lock::new(Vec::new()),
88 known_attrs: Lock::new(Vec::new()),
89 syntax_pos_globals: syntax_pos::Globals::new(),
94 pub fn with_globals<F, R>(f: F) -> R
95 where F: FnOnce() -> R
97 let globals = Globals::new();
98 GLOBALS.set(&globals, || {
99 syntax_pos::GLOBALS.set(&globals.syntax_pos_globals, f)
103 scoped_thread_local!(static GLOBALS: Globals);
106 pub mod diagnostics {
113 // NB: This module needs to be declared first so diagnostics are
114 // registered before they are used.
115 pub mod diagnostic_list;
118 pub mod lev_distance;
122 pub mod parser_testing;
123 pub mod small_vector;
127 pub use self::thin_vec::ThinVec;
130 pub use self::rc_slice::RcSlice;
149 pub mod feature_gate;
156 pub use syntax_pos::symbol;
167 pub use syntax_pos::hygiene;
172 pub mod placeholders;
178 pub mod macro_parser;
187 __build_diagnostic_array! { libsyntax, DIAGNOSTICS }