1 //! Syntax extensions in the Rust compiler.
3 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
4 html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
5 html_root_url = "https://doc.rust-lang.org/nightly/")]
7 #![deny(rust_2018_idioms)]
9 #![feature(in_band_lifetimes)]
10 #![feature(proc_macro_diagnostic)]
11 #![feature(proc_macro_internals)]
12 #![feature(proc_macro_span)]
13 #![feature(decl_macro)]
14 #![feature(str_escape)]
15 #![feature(rustc_diagnostic_macros)]
17 #![recursion_limit="256"]
19 extern crate proc_macro;
21 use rustc_errors as errors;
36 mod proc_macro_server;
42 pub mod proc_macro_decls;
43 pub mod proc_macro_impl;
45 use rustc_data_structures::sync::Lrc;
47 use syntax::ext::base::{MacroExpanderFn, NormalTT, NamedSyntaxExtension, MultiModifier};
48 use syntax::ext::hygiene;
49 use syntax::symbol::Symbol;
51 pub fn register_builtins(resolver: &mut dyn syntax::ext::base::Resolver,
52 user_exts: Vec<NamedSyntaxExtension>) {
53 deriving::register_builtin_derives(resolver);
55 let mut register = |name, ext| {
56 resolver.add_builtin(ast::Ident::with_empty_ctxt(name), Lrc::new(ext));
59 macro_rules! register {
60 ($( $name:ident: $f:expr, )*) => { $(
61 register(Symbol::intern(stringify!($name)),
63 expander: Box::new($f as MacroExpanderFn),
65 allow_internal_unstable: false,
66 allow_internal_unsafe: false,
67 local_inner_macros: false,
68 unstable_feature: None,
69 edition: hygiene::default_edition(),
74 use syntax::ext::source_util::*;
77 __rust_unstable_column: expand_column_gated,
78 column: expand_column,
80 stringify: expand_stringify,
81 include: expand_include,
82 include_str: expand_include_str,
83 include_bytes: expand_include_bytes,
84 module_path: expand_mod,
87 global_asm: global_asm::expand_global_asm,
89 concat: concat::expand_syntax_ext,
90 concat_idents: concat_idents::expand_syntax_ext,
92 option_env: env::expand_option_env,
93 log_syntax: log_syntax::expand_syntax_ext,
94 trace_macros: trace_macros::expand_trace_macros,
95 compile_error: compile_error::expand_compile_error,
96 assert: assert::expand_assert,
99 register(Symbol::intern("test_case"), MultiModifier(Box::new(test_case::expand)));
100 register(Symbol::intern("test"), MultiModifier(Box::new(test::expand_test)));
101 register(Symbol::intern("bench"), MultiModifier(Box::new(test::expand_bench)));
103 // format_args uses `unstable` things internally.
104 register(Symbol::intern("format_args"),
106 expander: Box::new(format::expand_format_args),
108 allow_internal_unstable: true,
109 allow_internal_unsafe: false,
110 local_inner_macros: false,
111 unstable_feature: None,
112 edition: hygiene::default_edition(),
114 register(Symbol::intern("format_args_nl"),
116 expander: Box::new(format::expand_format_args_nl),
118 allow_internal_unstable: true,
119 allow_internal_unsafe: false,
120 local_inner_macros: false,
121 unstable_feature: None,
122 edition: hygiene::default_edition(),
125 for (name, ext) in user_exts {