b3d74da9b8
Add tests showing the current state to make it more clear when output gets updated later in refactoring.
118 lines
3.0 KiB
Rust
118 lines
3.0 KiB
Rust
// General syntax errors that apply to all matavariable expressions
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//
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// We don't invoke the macros here to ensure code gets rejected at the definition rather than
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// only when expanded.
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#![feature(macro_metavar_expr)]
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macro_rules! dollar_dollar_in_the_lhs {
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( $$ $a:ident ) => {
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//~^ ERROR unexpected token: $
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};
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}
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macro_rules! metavar_in_the_lhs {
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( ${ len() } ) => {
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//~^ ERROR unexpected token: {
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//~| ERROR expected one of: `*`, `+`, or `?`
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};
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}
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macro_rules! metavar_token_without_ident {
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( $( $i:ident ),* ) => { ${ ignore() } };
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//~^ ERROR meta-variable expressions must be referenced using a dollar sign
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}
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macro_rules! metavar_with_literal_suffix {
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( $( $i:ident ),* ) => { ${ index(1u32) } };
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//~^ ERROR only unsuffixes integer literals are supported in meta-variable expressions
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}
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macro_rules! mve_without_parens {
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( $( $i:ident ),* ) => { ${ count } };
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//~^ ERROR meta-variable expression parameter must be wrapped in parentheses
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}
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#[rustfmt::skip]
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macro_rules! empty_expression {
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() => { ${} };
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//~^ ERROR expected identifier or string literal
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}
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#[rustfmt::skip]
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macro_rules! open_brackets_with_lit {
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() => { ${ "hi" } };
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//~^ ERROR expected identifier
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}
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macro_rules! mve_wrong_delim {
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( $( $i:ident ),* ) => { ${ count{i} } };
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//~^ ERROR meta-variable expression parameter must be wrapped in parentheses
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}
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macro_rules! invalid_metavar {
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() => { ${ignore($123)} }
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//~^ ERROR expected identifier, found `123`
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}
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#[rustfmt::skip]
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macro_rules! open_brackets_with_group {
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( $( $i:ident ),* ) => { ${ {} } };
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//~^ ERROR expected identifier
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}
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macro_rules! extra_garbage_after_metavar {
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( $( $i:ident ),* ) => {
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${count() a b c}
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//~^ ERROR unexpected token: a
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${count($i a b c)}
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//~^ ERROR unexpected token: a
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${count($i, 1 a b c)}
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//~^ ERROR unexpected token: a
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${count($i) a b c}
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//~^ ERROR unexpected token: a
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${ignore($i) a b c}
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//~^ ERROR unexpected token: a
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${ignore($i a b c)}
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//~^ ERROR unexpected token: a
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${index() a b c}
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//~^ ERROR unexpected token: a
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${index(1 a b c)}
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//~^ ERROR unexpected token: a
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${index() a b c}
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//~^ ERROR unexpected token: a
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${index(1 a b c)}
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//~^ ERROR unexpected token: a
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};
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}
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const IDX: usize = 1;
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macro_rules! metavar_depth_is_not_literal {
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( $( $i:ident ),* ) => { ${ index(IDX) } };
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//~^ ERROR meta-variable expression depth must be a literal
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}
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macro_rules! unknown_count_ident {
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( $( $i:ident )* ) => {
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${count(foo)}
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//~^ ERROR meta-variable expressions must be referenced using a dollar sign
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};
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}
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macro_rules! unknown_ignore_ident {
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( $( $i:ident )* ) => {
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${ignore(bar)}
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//~^ ERROR meta-variable expressions must be referenced using a dollar sign
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};
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}
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macro_rules! unknown_metavar {
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( $( $i:ident ),* ) => { ${ aaaaaaaaaaaaaa(i) } };
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//~^ ERROR unrecognized meta-variable expression
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}
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fn main() {}
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