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;
33 mod proc_macro_server;
39 pub mod proc_macro_decls;
40 pub mod proc_macro_impl;
42 use rustc_data_structures::sync::Lrc;
44 use syntax::ext::base::{MacroExpanderFn, NormalTT, NamedSyntaxExtension, MultiModifier};
45 use syntax::ext::hygiene;
46 use syntax::symbol::Symbol;
48 pub fn register_builtins(resolver: &mut dyn syntax::ext::base::Resolver,
49 user_exts: Vec<NamedSyntaxExtension>) {
50 deriving::register_builtin_derives(resolver);
52 let mut register = |name, ext| {
53 resolver.add_builtin(ast::Ident::with_empty_ctxt(name), Lrc::new(ext));
56 macro_rules! register {
57 ($( $name:ident: $f:expr, )*) => { $(
58 register(Symbol::intern(stringify!($name)),
60 expander: Box::new($f as MacroExpanderFn),
62 allow_internal_unstable: None,
63 allow_internal_unsafe: false,
64 local_inner_macros: false,
65 unstable_feature: None,
66 edition: hygiene::default_edition(),
71 use syntax::ext::source_util::*;
74 __rust_unstable_column: expand_column_gated,
75 column: expand_column,
77 stringify: expand_stringify,
78 include: expand_include,
79 include_str: expand_include_str,
80 include_bytes: expand_include_bytes,
81 module_path: expand_mod,
84 global_asm: global_asm::expand_global_asm,
86 concat: concat::expand_syntax_ext,
87 concat_idents: concat_idents::expand_syntax_ext,
89 option_env: env::expand_option_env,
90 log_syntax: log_syntax::expand_syntax_ext,
91 trace_macros: trace_macros::expand_trace_macros,
92 compile_error: compile_error::expand_compile_error,
93 assert: assert::expand_assert,
96 register(Symbol::intern("test_case"), MultiModifier(Box::new(test_case::expand)));
97 register(Symbol::intern("test"), MultiModifier(Box::new(test::expand_test)));
98 register(Symbol::intern("bench"), MultiModifier(Box::new(test::expand_bench)));
100 // format_args uses `unstable` things internally.
101 register(Symbol::intern("format_args"),
103 expander: Box::new(format::expand_format_args),
105 allow_internal_unstable: Some(vec![
106 Symbol::intern("fmt_internals"),
108 allow_internal_unsafe: false,
109 local_inner_macros: false,
110 unstable_feature: None,
111 edition: hygiene::default_edition(),
113 register(Symbol::intern("format_args_nl"),
115 expander: Box::new(format::expand_format_args_nl),
117 allow_internal_unstable: Some(vec![
118 Symbol::intern("fmt_internals"),
120 allow_internal_unsafe: false,
121 local_inner_macros: false,
122 unstable_feature: None,
123 edition: hygiene::default_edition(),
126 for (name, ext) in user_exts {