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32 lines
733 B
Rust
32 lines
733 B
Rust
#![feature(decl_macro, rustc_attrs)]
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#[rustc_macro_transparency = "transparent"]
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macro transparent() {
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struct Transparent;
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let transparent = 0;
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}
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#[rustc_macro_transparency = "semitransparent"]
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macro semitransparent() {
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struct SemiTransparent;
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let semitransparent = 0;
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}
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#[rustc_macro_transparency = "opaque"]
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macro opaque() {
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struct Opaque;
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let opaque = 0;
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}
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fn main() {
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transparent!();
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semitransparent!();
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opaque!();
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Transparent; // OK
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SemiTransparent; // OK
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Opaque; //~ ERROR cannot find value `Opaque` in this scope
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transparent; // OK
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semitransparent; //~ ERROR expected value, found macro `semitransparent`
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opaque; //~ ERROR expected value, found macro `opaque`
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}
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