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 #![feature(rustc_attrs)]
25 #![feature(rustc_diagnostic_macros)]
26 #![feature(slice_sort_by_cached_key)]
27 #![feature(str_escape)]
28 #![feature(unicode_internals)]
30 #![recursion_limit="256"]
32 #[macro_use] extern crate bitflags;
34 extern crate serialize;
35 #[macro_use] extern crate log;
36 pub extern crate rustc_errors as errors;
37 extern crate syntax_pos;
38 extern crate rustc_data_structures;
39 extern crate rustc_target;
40 #[macro_use] extern crate scoped_tls;
42 extern crate serialize as rustc_serialize; // used by deriving
44 use rustc_data_structures::sync::Lock;
45 use rustc_data_structures::bitvec::BitVector;
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<BitVector<AttrId>>,
80 known_attrs: Lock<BitVector<AttrId>>,
81 syntax_pos_globals: syntax_pos::Globals,
87 // We have no idea how many attributes their will be, so just
88 // initiate the vectors with 0 bits. We'll grow them as necessary.
89 used_attrs: Lock::new(BitVector::new()),
90 known_attrs: Lock::new(BitVector::new()),
91 syntax_pos_globals: syntax_pos::Globals::new(),
96 pub fn with_globals<F, R>(f: F) -> R
97 where F: FnOnce() -> R
99 let globals = Globals::new();
100 GLOBALS.set(&globals, || {
101 syntax_pos::GLOBALS.set(&globals.syntax_pos_globals, f)
105 scoped_thread_local!(pub static GLOBALS: Globals);
108 pub mod diagnostics {
115 // NB: This module needs to be declared first so diagnostics are
116 // registered before they are used.
117 pub mod diagnostic_list;
120 pub mod lev_distance;
124 pub mod parser_testing;
125 pub mod small_vector;
129 pub use self::thin_vec::ThinVec;
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 }