31fa44b18e
This halves the backtrace length. The definition site wasn't very useful anyways, since it may be invalid (for compiler expansions) or located in another crate. Since the macro name is still printed, grepping for it is still an easy way of finding the definition.
30 lines
961 B
Rust
30 lines
961 B
Rust
// 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 {
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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 in this expansion of
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}
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