50 lines
1.1 KiB
Rust
50 lines
1.1 KiB
Rust
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#![feature(decl_macro)]
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#![deny(unused_macro_rules)]
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// To make sure we are not hitting this
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#![deny(unused_macros)]
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// Most simple case
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macro num {
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(one) => { 1 },
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(two) => { 2 }, //~ ERROR: 2nd rule of macro
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(three) => { 3 },
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(four) => { 4 }, //~ ERROR: 4th rule of macro
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}
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const _NUM: u8 = num!(one) + num!(three);
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// Check that allowing the lint works
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#[allow(unused_macro_rules)]
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macro num_allowed {
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(one) => { 1 },
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(two) => { 2 },
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(three) => { 3 },
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(four) => { 4 },
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}
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const _NUM_ALLOWED: u8 = num_allowed!(one) + num_allowed!(three);
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// Check that macro calls inside the macro trigger as usage
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macro num_rec {
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(one) => { 1 },
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(two) => {
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num_rec!(one) + num_rec!(one)
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},
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(three) => { //~ ERROR: 3rd rule of macro
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num_rec!(one) + num_rec!(two)
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},
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(four) => {
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num_rec!(two) + num_rec!(two)
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},
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}
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const _NUM_RECURSIVE: u8 = num_rec!(four);
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// No error if the macro is public
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pub macro num_public {
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(one) => { 1 },
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(two) => { 2 },
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(three) => { 3 },
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(four) => { 4 },
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}
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const _NUM_PUBLIC: u8 = num_public!(one) + num_public!(three);
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fn main() {}
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