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//! Syntax extensions in the Rust compiler.
#![doc(html_root_url = "https://doc.rust-lang.org/nightly/")]
#![deny(rust_2018_idioms)]
#![deny(internal)]
#![deny(unused_lifetimes)]
#![feature(in_band_lifetimes)]
#![feature(proc_macro_diagnostic)]
#![feature(proc_macro_internals)]
#![feature(proc_macro_span)]
#![feature(decl_macro)]
#![feature(nll)]
#![feature(rustc_diagnostic_macros)]
#![recursion_limit="256"]
extern crate proc_macro;
mod error_codes;
mod asm;
mod assert;
mod cfg;
mod compile_error;
mod concat;
mod concat_idents;
mod env;
mod format;
mod format_foreign;
mod global_asm;
mod log_syntax;
mod proc_macro_server;
mod test;
mod test_case;
mod trace_macros;
pub mod deriving;
pub mod proc_macro_decls;
pub mod proc_macro_impl;
use rustc_data_structures::sync::Lrc;
use syntax::ast;
use syntax::ext::base::MacroExpanderFn;
use syntax::ext::base::{NamedSyntaxExtension, SyntaxExtension, SyntaxExtensionKind};
use syntax::edition::Edition;
use syntax::symbol::{sym, Symbol};
pub fn register_builtins(resolver: &mut dyn syntax::ext::base::Resolver,
user_exts: Vec<NamedSyntaxExtension>,
edition: Edition) {
deriving::register_builtin_derives(resolver, edition);
let mut register = |name, ext| {
resolver.add_builtin(ast::Ident::with_empty_ctxt(name), Lrc::new(ext));
};
macro_rules! register {
($( $name:ident: $f:expr, )*) => { $(
register(Symbol::intern(stringify!($name)), SyntaxExtension::default(
SyntaxExtensionKind::LegacyBang(Box::new($f as MacroExpanderFn)), edition
));
)* }
}
macro_rules! register_attr {
($( $name:ident: $f:expr, )*) => { $(
register(Symbol::intern(stringify!($name)), SyntaxExtension::default(
SyntaxExtensionKind::LegacyAttr(Box::new($f)), edition
));
)* }
}
use syntax::ext::source_util::*;
register! {
line: expand_line,
__rust_unstable_column: expand_column_gated,
column: expand_column,
file: expand_file,
stringify: expand_stringify,
include: expand_include,
include_str: expand_include_str,
include_bytes: expand_include_bytes,
module_path: expand_mod,
asm: asm::expand_asm,
global_asm: global_asm::expand_global_asm,
cfg: cfg::expand_cfg,
concat: concat::expand_syntax_ext,
concat_idents: concat_idents::expand_syntax_ext,
env: env::expand_env,
option_env: env::expand_option_env,
log_syntax: log_syntax::expand_syntax_ext,
trace_macros: trace_macros::expand_trace_macros,
compile_error: compile_error::expand_compile_error,
assert: assert::expand_assert,
}
register_attr! {
test_case: test_case::expand,
test: test::expand_test,
bench: test::expand_bench,
}
// format_args uses `unstable` things internally.
let allow_internal_unstable = Some([sym::fmt_internals][..].into());
register(Symbol::intern("format_args"), SyntaxExtension {
allow_internal_unstable: allow_internal_unstable.clone(),
..SyntaxExtension::default(
SyntaxExtensionKind::LegacyBang(Box::new(format::expand_format_args)), edition
)
});
register(sym::format_args_nl, SyntaxExtension {
allow_internal_unstable,
..SyntaxExtension::default(
SyntaxExtensionKind::LegacyBang(Box::new(format::expand_format_args_nl)), edition
)
});
for (name, ext) in user_exts {
register(name, ext);
}
}
|
