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Updated code sample in chapter on syntax extensions.

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The affected API apparently had changed with commit d59accfb06.
This commit is contained in:
Vincent Esche 2016-08-24 15:43:28 +02:00
parent 308824acec
commit bf22a7a71a
1 changed files with 3 additions and 3 deletions
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6
src/doc/book/compiler-plugins.md
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@ -46,10 +46,10 @@ extern crate rustc;
extern crate rustc_plugin;
use syntax::parse::token;
use syntax::ast::TokenTree;
use syntax::tokenstream::TokenTree;
use syntax::ext::base::{ExtCtxt, MacResult, DummyResult, MacEager};
use syntax::ext::build::AstBuilder; // trait for expr_usize
use syntax_pos::Span;
use syntax::ext::quote::rt::Span;
use rustc_plugin::Registry;
fn expand_rn(cx: &mut ExtCtxt, sp: Span, args: &[TokenTree])
@ -69,7 +69,7 @@ fn expand_rn(cx: &mut ExtCtxt, sp: Span, args: &[TokenTree])
}
let text = match args[0] {
TokenTree::Token(_, token::Ident(s, _)) => s.to_string(),
TokenTree::Token(_, token::Ident(s)) => s.to_string(),
_ => {
cx.span_err(sp, "argument should be a single identifier");
return DummyResult::any(sp);