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19 lines
642 B
Rust
19 lines
642 B
Rust
#![feature(trace_macros)]
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fn main() {
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trace_macros!(); //~ ERROR trace_macros! accepts only `true` or `false`
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trace_macros!(1); //~ ERROR trace_macros! accepts only `true` or `false`
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trace_macros!(ident); //~ ERROR trace_macros! accepts only `true` or `false`
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trace_macros!(for); //~ ERROR trace_macros! accepts only `true` or `false`
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trace_macros!(true,); //~ ERROR trace_macros! accepts only `true` or `false`
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trace_macros!(false 1); //~ ERROR trace_macros! accepts only `true` or `false`
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// should be fine:
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macro_rules! expando {
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($x: ident) => { trace_macros!($x) }
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}
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expando!(true);
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}
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