src/libsyntax_ext/lib.rs

   1 // Copyright 2015 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.
   4 //
   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.
  10
  11 //! Syntax extensions in the Rust compiler.
  12
  13 #![crate_name = "syntax_ext"]
  14 #![crate_type = "dylib"]
  15 #![crate_type = "rlib"]
  16 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png",
  17        html_favicon_url = "https://doc.rust-lang.org/favicon.ico",
  18        html_root_url = "https://doc.rust-lang.org/nightly/")]
  19
  20 #![unstable(feature = "rustc_private", issue = "27812")]
  21
  22 #![feature(rustc_private)]
  23 #![feature(staged_api)]
  24 #![feature(str_char)]
  25
  26 extern crate fmt_macros;
  27 #[macro_use]
  28 extern crate syntax;
  29
  30 use syntax::ext::base::{MacroExpanderFn, NormalTT};
  31 use syntax::ext::base::{SyntaxEnv, SyntaxExtension};
  32 use syntax::parse::token::intern;
  33
  34
  35 mod asm;
  36 mod cfg;
  37 mod concat;
  38 mod concat_idents;
  39 mod env;
  40 mod format;
  41 mod log_syntax;
  42 mod trace_macros;
  43
  44 // for custom_derive
  45 pub mod deriving;
  46
  47 pub fn register_builtins(env: &mut SyntaxEnv) {
  48     // utility function to simplify creating NormalTT syntax extensions
  49     fn builtin_normal_expander(f: MacroExpanderFn) -> SyntaxExtension {
  50         NormalTT(Box::new(f), None, false)
  51     }
  52
  53     env.insert(intern("asm"),
  54                builtin_normal_expander(asm::expand_asm));
  55     env.insert(intern("cfg"),
  56                builtin_normal_expander(cfg::expand_cfg));
  57     env.insert(intern("concat"),
  58                builtin_normal_expander(concat::expand_syntax_ext));
  59     env.insert(intern("concat_idents"),
  60                builtin_normal_expander(concat_idents::expand_syntax_ext));
  61     env.insert(intern("env"),
  62                builtin_normal_expander(env::expand_env));
  63     env.insert(intern("option_env"),
  64                builtin_normal_expander(env::expand_option_env));
  65     env.insert(intern("format_args"),
  66                // format_args uses `unstable` things internally.
  67                NormalTT(Box::new(format::expand_format_args), None, true));
  68     env.insert(intern("log_syntax"),
  69                builtin_normal_expander(log_syntax::expand_syntax_ext));
  70     env.insert(intern("trace_macros"),
  71                builtin_normal_expander(trace_macros::expand_trace_macros));
  72
  73     deriving::register_all(env);
  74 }