rust/compiler/rustc_builtin_macros/src/log_syntax.rs

use rustc_ast::tokenstream::TokenStream;
use rustc_ast_pretty::pprust;
use rustc_expand::base;

pub fn expand_log_syntax<'cx>(
    _cx: &'cx mut base::ExtCtxt<'_>,
    sp: rustc_span::Span,
    tts: TokenStream,
) -> Box<dyn base::MacResult + 'cx> {
    println!("{}", pprust::tts_to_string(&tts));

    // any so that `log_syntax` can be invoked as an expression and item.
    base::DummyResult::any_valid(sp)
}
Rename `syntax` to `rustc_ast` in source code 2020-02-29 17:37:32 +00:00			`use rustc_ast::tokenstream::TokenStream;`
syntax::print -> new crate rustc_ast_pretty 2020-01-11 16:02:46 +00:00			`use rustc_ast_pretty::pprust;`
Rename `libsyntax_ext` and `libsyntax_expand` in code 2019-12-29 14:23:55 +00:00			`use rustc_expand::base;`
librustc: Terminate name searches at the nearest module scope for paths that contain at least two components. r=graydon 2012-12-23 22:41:37 +00:00
use consistent naming for buildin expansion functions 2019-09-03 14:43:25 +00:00			`pub fn expand_log_syntax<'cx>(`
			`_cx: &'cx mut base::ExtCtxt<'_>,`
Rename `syntax_pos` to `rustc_span` in source code 2019-12-31 17:15:40 +00:00			`sp: rustc_span::Span,`
use TokenStream rather than &[TokenTree] for built-in macros That way, we don't loose the jointness info 2019-08-31 17:08:06 +00:00			`tts: TokenStream,`
Deny bare trait objects in src/libsyntax_ext 2018-07-12 09:58:16 +00:00			`) -> Box<dyn base::MacResult + 'cx> {`
ast_pretty: Pass some token streams and trees by reference 2020-06-24 14:45:08 +00:00			`println!("{}", pprust::tts_to_string(&tts));`
Add a syntax extension to log syntax, for debugging macros. 2011-08-08 21:17:33 +00:00
syntax: allow `trace_macros!` and `log_syntax!` in item position. Previously trace_macros!(true) fn main() {} would complain about `trace_macros` being an expression macro in item position. This is a pointless limitation, because the macro is purely compile-time, with no runtime effect. (And similarly for log_syntax.) This also changes the behaviour of `trace_macros!` very slightly, it used to be equivalent to macro_rules! trace_macros { (true $($_x: tt)) => { true }; (false $($_x: tt)) => { false } } I.e. you could invoke it with arbitrary trailing arguments, which were ignored. It is changed to accept only exactly `true` or `false` (with no trailing arguments) and expands to `()`. 2014-03-18 12:14:08 +00:00			// any so that `log_syntax` can be invoked as an expression and item.
Fix `trace_macros` and `log_syntax` 2018-12-20 00:57:48 +00:00			`base::DummyResult::any_valid(sp)`
Port the compiler to the typaram foo<T> syntax. 2011-08-12 14:15:18 +00:00			`}`