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))))]
22 #![feature(crate_visibility_modifier)]
23 #![feature(macro_at_most_once_rep)]
24 #![cfg_attr(not(stage0), feature(nll))]
25 #![feature(rustc_attrs)]
26 #![feature(rustc_diagnostic_macros)]
27 #![feature(slice_sort_by_cached_key)]
28 #![feature(str_escape)]
29 #![feature(unicode_internals)]
30 #![feature(catch_expr)]
32 #![recursion_limit="256"]
34 #[macro_use] extern crate bitflags;
36 extern crate serialize;
37 #[macro_use] extern crate log;
38 pub extern crate rustc_errors as errors;
39 extern crate syntax_pos;
40 extern crate rustc_data_structures;
41 extern crate rustc_target;
42 #[macro_use] extern crate scoped_tls;
44 extern crate serialize as rustc_serialize; // used by deriving
46 use rustc_data_structures::sync::Lock;
47 use rustc_data_structures::bitvec::BitVector;
48 pub use rustc_data_structures::small_vec::OneVector;
49 pub use rustc_data_structures::thin_vec::ThinVec;
52 // A variant of 'try!' that panics on an Err. This is used as a crutch on the
53 // way towards a non-panic!-prone parser. It should be used for fatal parsing
54 // errors; eventually we plan to convert all code using panictry to just use
56 // Exported for syntax_ext, not meant for general use.
58 macro_rules! panictry {
60 use std::result::Result::{Ok, Err};
61 use errors::FatalError;
73 macro_rules! unwrap_or {
74 ($opt:expr, $default:expr) => {
83 used_attrs: Lock<BitVector<AttrId>>,
84 known_attrs: Lock<BitVector<AttrId>>,
85 syntax_pos_globals: syntax_pos::Globals,
91 // We have no idea how many attributes their will be, so just
92 // initiate the vectors with 0 bits. We'll grow them as necessary.
93 used_attrs: Lock::new(BitVector::new()),
94 known_attrs: Lock::new(BitVector::new()),
95 syntax_pos_globals: syntax_pos::Globals::new(),
100 pub fn with_globals<F, R>(f: F) -> R
101 where F: FnOnce() -> R
103 let globals = Globals::new();
104 GLOBALS.set(&globals, || {
105 syntax_pos::GLOBALS.set(&globals.syntax_pos_globals, f)
109 scoped_thread_local!(pub static GLOBALS: Globals);
112 pub mod diagnostics {
119 // NB: This module needs to be declared first so diagnostics are
120 // registered before they are used.
121 pub mod diagnostic_list;
124 pub mod lev_distance;
128 pub mod parser_testing;
132 pub use self::rc_slice::RcSlice;
149 pub mod feature_gate;
156 pub use syntax_pos::edition;
157 pub use syntax_pos::symbol;
168 pub use syntax_pos::hygiene;
173 pub mod placeholders;
179 pub mod macro_parser;
185 pub mod early_buffered_lints;
190 __build_diagnostic_array! { libsyntax, DIAGNOSTICS }