1 //! Syntax extensions in the Rust compiler.
3 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
5 #![deny(rust_2018_idioms)]
7 #![feature(in_band_lifetimes)]
8 #![feature(proc_macro_diagnostic)]
9 #![feature(proc_macro_internals)]
10 #![feature(proc_macro_span)]
11 #![feature(decl_macro)]
13 #![feature(str_escape)]
14 #![feature(rustc_diagnostic_macros)]
16 #![recursion_limit="256"]
18 extern crate proc_macro;
20 use rustc_errors as errors;
35 mod proc_macro_server;
41 pub mod proc_macro_decls;
42 pub mod proc_macro_impl;
44 use rustc_data_structures::sync::Lrc;
46 use syntax::ext::base::{MacroExpanderFn, NormalTT, NamedSyntaxExtension, MultiModifier};
47 use syntax::ext::hygiene;
48 use syntax::symbol::Symbol;
50 pub fn register_builtins(resolver: &mut dyn syntax::ext::base::Resolver,
51 user_exts: Vec<NamedSyntaxExtension>) {
52 deriving::register_builtin_derives(resolver);
54 let mut register = |name, ext| {
55 resolver.add_builtin(ast::Ident::with_empty_ctxt(name), Lrc::new(ext));
58 macro_rules! register {
59 ($( $name:ident: $f:expr, )*) => { $(
60 register(Symbol::intern(stringify!($name)),
62 expander: Box::new($f as MacroExpanderFn),
64 allow_internal_unstable: None,
65 allow_internal_unsafe: false,
66 local_inner_macros: false,
67 unstable_feature: None,
68 edition: hygiene::default_edition(),
73 use syntax::ext::source_util::*;
76 __rust_unstable_column: expand_column_gated,
77 column: expand_column,
79 stringify: expand_stringify,
80 include: expand_include,
81 include_str: expand_include_str,
82 include_bytes: expand_include_bytes,
83 module_path: expand_mod,
86 global_asm: global_asm::expand_global_asm,
88 concat: concat::expand_syntax_ext,
89 concat_idents: concat_idents::expand_syntax_ext,
91 option_env: env::expand_option_env,
92 log_syntax: log_syntax::expand_syntax_ext,
93 trace_macros: trace_macros::expand_trace_macros,
94 compile_error: compile_error::expand_compile_error,
95 assert: assert::expand_assert,
98 register(Symbol::intern("test_case"), MultiModifier(Box::new(test_case::expand)));
99 register(Symbol::intern("test"), MultiModifier(Box::new(test::expand_test)));
100 register(Symbol::intern("bench"), MultiModifier(Box::new(test::expand_bench)));
102 // format_args uses `unstable` things internally.
103 register(Symbol::intern("format_args"),
105 expander: Box::new(format::expand_format_args),
107 allow_internal_unstable: Some(vec![
108 Symbol::intern("fmt_internals"),
110 allow_internal_unsafe: false,
111 local_inner_macros: false,
112 unstable_feature: None,
113 edition: hygiene::default_edition(),
115 register(Symbol::intern("format_args_nl"),
117 expander: Box::new(format::expand_format_args_nl),
119 allow_internal_unstable: Some(vec![
120 Symbol::intern("fmt_internals"),
122 allow_internal_unsafe: false,
123 local_inner_macros: false,
124 unstable_feature: None,
125 edition: hygiene::default_edition(),
128 for (name, ext) in user_exts {