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 #![deny(warnings)]
  20
  21 #![feature(proc_macro_internals)]
  22
  23 #![cfg_attr(stage0, unstable(feature = "rustc_private", issue = "27812"))]
  24 #![cfg_attr(stage0, feature(rustc_private))]
  25 #![cfg_attr(stage0, feature(staged_api))]
  26
  27 extern crate fmt_macros;
  28 extern crate log;
  29 #[macro_use]
  30 extern crate syntax;
  31 extern crate syntax_pos;
  32 extern crate proc_macro;
  33 extern crate rustc_errors as errors;
  34
  35 mod asm;
  36 mod cfg;
  37 mod concat;
  38 mod concat_idents;
  39 mod env;
  40 mod format;
  41 mod format_foreign;
  42 mod global_asm;
  43 mod log_syntax;
  44 mod trace_macros;
  45
  46 pub mod proc_macro_registrar;
  47
  48 // for custom_derive
  49 pub mod deriving;
  50
  51 pub mod proc_macro_impl;
  52
  53 use std::rc::Rc;
  54 use syntax::ast;
  55 use syntax::ext::base::{MacroExpanderFn, NormalTT, NamedSyntaxExtension};
  56 use syntax::symbol::Symbol;
  57
  58 pub fn register_builtins(resolver: &mut syntax::ext::base::Resolver,
  59                          user_exts: Vec<NamedSyntaxExtension>,
  60                          enable_quotes: bool) {
  61     deriving::register_builtin_derives(resolver);
  62
  63     let mut register = |name, ext| {
  64         resolver.add_builtin(ast::Ident::with_empty_ctxt(name), Rc::new(ext));
  65     };
  66
  67     macro_rules! register {
  68         ($( $name:ident: $f:expr, )*) => { $(
  69             register(Symbol::intern(stringify!($name)),
  70                      NormalTT(Box::new($f as MacroExpanderFn), None, false));
  71         )* }
  72     }
  73
  74     if enable_quotes {
  75         use syntax::ext::quote::*;
  76         register! {
  77             quote_tokens: expand_quote_tokens,
  78             quote_expr: expand_quote_expr,
  79             quote_ty: expand_quote_ty,
  80             quote_item: expand_quote_item,
  81             quote_pat: expand_quote_pat,
  82             quote_arm: expand_quote_arm,
  83             quote_stmt: expand_quote_stmt,
  84             quote_attr: expand_quote_attr,
  85             quote_arg: expand_quote_arg,
  86             quote_block: expand_quote_block,
  87             quote_meta_item: expand_quote_meta_item,
  88             quote_path: expand_quote_path,
  89         }
  90     }
  91
  92     use syntax::ext::source_util::*;
  93     register! {
  94         line: expand_line,
  95         column: expand_column,
  96         file: expand_file,
  97         stringify: expand_stringify,
  98         include: expand_include,
  99         include_str: expand_include_str,
 100         include_bytes: expand_include_bytes,
 101         module_path: expand_mod,
 102
 103         asm: asm::expand_asm,
 104         global_asm: global_asm::expand_global_asm,
 105         cfg: cfg::expand_cfg,
 106         concat: concat::expand_syntax_ext,
 107         concat_idents: concat_idents::expand_syntax_ext,
 108         env: env::expand_env,
 109         option_env: env::expand_option_env,
 110         log_syntax: log_syntax::expand_syntax_ext,
 111         trace_macros: trace_macros::expand_trace_macros,
 112     }
 113
 114     // format_args uses `unstable` things internally.
 115     register(Symbol::intern("format_args"),
 116              NormalTT(Box::new(format::expand_format_args), None, true));
 117
 118     for (name, ext) in user_exts {
 119         register(name, ext);
 120     }
 121 }