mirror of https://github.com/rust-lang/rust
40 lines
1.8 KiB
Rust
40 lines
1.8 KiB
Rust
macro_rules! make_macro {
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($macro_name:ident $($matcher:tt)*) => {
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#[macro_export]
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macro_rules! $macro_name {
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(<= $($matcher)* =>) => {};
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}
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}
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}
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// @has macro_generated_macro/macro.interpolations.html //pre 'macro_rules! interpolations {'
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// @has - //pre '(<= type $($i:ident)::* + $e:expr =>) => { ... };'
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make_macro!(interpolations type $($i:ident)::* + $e:expr);
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interpolations!(<= type foo::bar + x.sort() =>);
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// @has macro_generated_macro/macro.attributes.html //pre 'macro_rules! attributes {'
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// @has - //pre '(<= #![no_std] #[cfg(feature = "alloc")] =>) => { ... };'
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make_macro!(attributes #![no_std] #[cfg(feature = "alloc")]);
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// @has macro_generated_macro/macro.groups.html //pre 'macro_rules! groups {'
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// @has - //pre '(<= fn {} () { foo[0] } =>) => { ... };'
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make_macro!(groups fn {}() {foo[0]});
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// @snapshot macro_linebreak_pre macro_generated_macro/macro.linebreak.html //pre/text()
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make_macro!(linebreak 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28);
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// @snapshot macro_morestuff_pre macro_generated_macro/macro.morestuff.html //pre/text()
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make_macro!(morestuff
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"space between most kinds of tokens": 1 $x + @ :: >>= 'static
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"no space inside paren or bracket": (2 a) [2 a] $(2 $a:tt)*
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"space inside curly brace": { 2 a }
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"no space inside empty delimiters": () [] {}
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"no space before comma or semicolon": a, (a), { a }, a; [T; 0];
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"the three repetition specifiers": $(@)*, $(@)+, $(@)?
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"repetition separators": $(@)|*, $(@)|+, $(@)==*, $(@)static*
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"plus or star cannot be a repetition separator": $(@)+ * $(@)* +
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"no space between ident and paren": let _ = f(0) + f[0] + Struct {};
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"space between keyword and paren": return (a,) & for x in (..)
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"some special case keywords": pub(crate), fn() -> u8, Self(0, 0)
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);
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