30 lines
980 B
Rust
30 lines
980 B
Rust
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// Copyright 2015 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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// In expression position, but not statement position, when we expand a macro,
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// we replace the span of the expanded expression with that of the call site.
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macro_rules! nested_expr {
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() => (fake)
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}
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macro_rules! call_nested_expr {
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() => (nested_expr!())
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}
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macro_rules! call_nested_expr_sum { //~ NOTE in expansion of
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() => { 1 + nested_expr!(); } //~ ERROR unresolved name
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}
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fn main() {
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1 + call_nested_expr!(); //~ ERROR unresolved name
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call_nested_expr_sum!(); //~ NOTE expansion site
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}
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