58 lines
1.7 KiB
Rust
58 lines
1.7 KiB
Rust
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// Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// ignore-cross-compile
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// error-pattern:expected identifier, found keyword `let`
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#![feature(quote, rustc_private)]
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extern crate syntax;
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use syntax::ast;
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use syntax::codemap;
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use syntax::parse;
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use syntax::print::pprust;
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trait FakeExtCtxt {
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fn call_site(&self) -> codemap::Span;
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fn cfg(&self) -> ast::CrateConfig;
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fn ident_of(&self, st: &str) -> ast::Ident;
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fn name_of(&self, st: &str) -> ast::Name;
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fn parse_sess(&self) -> &parse::ParseSess;
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}
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impl FakeExtCtxt for parse::ParseSess {
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fn call_site(&self) -> codemap::Span {
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codemap::Span {
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lo: codemap::BytePos(0),
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hi: codemap::BytePos(0),
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expn_id: codemap::NO_EXPANSION,
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}
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}
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fn cfg(&self) -> ast::CrateConfig { Vec::new() }
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fn ident_of(&self, st: &str) -> ast::Ident {
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parse::token::str_to_ident(st)
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}
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fn name_of(&self, st: &str) -> ast::Name {
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parse::token::intern(st)
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}
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fn parse_sess(&self) -> &parse::ParseSess { self }
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}
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fn main() {
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let cx = parse::new_parse_sess();
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assert_eq!(pprust::expr_to_string(&*quote_expr!(&cx, 23)), "23");
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let expr = quote_expr!(&cx, let x isize = 20;);
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assert_eq!(pprust::expr_to_string(&*expr), "let x isize = 20;");
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}
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