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//@ edition: 2021
#![feature(macro_metavar_expr_concat)]
macro_rules! syntax_errors {
($ex:expr) => {
${concat()}
//~^ ERROR expected identifier
${concat(aaaa)}
//~^ ERROR `concat` must have at least two elements
${concat(aaaa,)}
//~^ ERROR expected identifier
${concat(_, aaaa)}
${concat(aaaa aaaa)}
//~^ ERROR expected comma
${concat($ex)}
//~^ ERROR `concat` must have at least two elements
${concat($ex, aaaa)}
//~^ ERROR metavariables of `${concat(..)}` must be of type
${concat($ex, aaaa 123)}
//~^ ERROR expected comma
${concat($ex, aaaa,)}
//~^ ERROR expected identifier
};
}
macro_rules! dollar_sign_without_referenced_ident {
($ident:ident) => {
const ${concat(FOO, $foo)}: i32 = 2;
//~^ ERROR variable `foo` is not recognized in meta-variable expression
};
}
macro_rules! starting_number {
($ident:ident) => {{
let ${concat("1", $ident)}: () = ();
//~^ ERROR `${concat(..)}` is not generating a valid identifier
}};
}
macro_rules! starting_valid_unicode {
($ident:ident) => {{
let ${concat("Ý", $ident)}: () = ();
}};
}
macro_rules! starting_invalid_unicode {
($ident:ident) => {{
let ${concat("\u{00BD}", $ident)}: () = ();
//~^ ERROR `${concat(..)}` is not generating a valid identifier
}};
}
macro_rules! ending_number {
($ident:ident) => {{
let ${concat($ident, "1")}: () = ();
}};
}
macro_rules! ending_valid_unicode {
($ident:ident) => {{
let ${concat($ident, "Ý")}: () = ();
}};
}
macro_rules! ending_invalid_unicode {
($ident:ident) => {{
let ${concat($ident, "\u{00BD}")}: () = ();
//~^ ERROR `${concat(..)}` is not generating a valid identifier
}};
}
macro_rules! empty {
() => {{
let ${concat("", "")}: () = ();
//~^ ERROR `${concat(..)}` is not generating a valid identifier
}};
}
macro_rules! unsupported_literals {
($ident:ident) => {{
let ${concat(_a, 'b')}: () = ();
//~^ ERROR expected identifier or string literal
//~| ERROR expected pattern
let ${concat(_a, 1)}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat(_a, 1.5)}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat(_a, c"hi")}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat(_a, b"hi")}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat(_a, b'b')}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat(_a, b'b')}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat($ident, 'b')}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat($ident, 1)}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat($ident, 1.5)}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat($ident, c"hi")}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat($ident, b"hi")}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat($ident, b'b')}: () = ();
//~^ ERROR expected identifier or string literal
let ${concat($ident, b'b')}: () = ();
//~^ ERROR expected identifier or string literal
}};
}
macro_rules! bad_literal_string {
($literal:literal) => {
const ${concat(_foo, $literal)}: () = ();
//~^ ERROR `${concat(..)}` is not generating a valid identifier
//~| ERROR `${concat(..)}` is not generating a valid identifier
//~| ERROR `${concat(..)}` is not generating a valid identifier
//~| ERROR `${concat(..)}` is not generating a valid identifier
//~| ERROR `${concat(..)}` is not generating a valid identifier
//~| ERROR `${concat(..)}` is not generating a valid identifier
//~| ERROR `${concat(..)}` is not generating a valid identifier
}
}
macro_rules! bad_literal_non_string {
($literal:literal) => {
const ${concat(_foo, $literal)}: () = ();
//~^ ERROR metavariables of `${concat(..)}` must be of type
//~| ERROR metavariables of `${concat(..)}` must be of type
//~| ERROR metavariables of `${concat(..)}` must be of type
//~| ERROR metavariables of `${concat(..)}` must be of type
//~| ERROR floats are not supported as metavariables of `${concat(..)}`
//~| ERROR integer metavariables of `${concat(..)}` must not be suffixed
//~| ERROR integer metavariables of `${concat(..)}` must not be suffixed
}
}
macro_rules! bad_tt_literal {
($tt:tt) => {
const ${concat(_foo, $tt)}: () = ();
//~^ ERROR metavariables of `${concat(..)}` must be of type
//~| ERROR metavariables of `${concat(..)}` must be of type
}
}
fn main() {
syntax_errors!(1);
dollar_sign_without_referenced_ident!(VAR);
starting_number!(_abc);
starting_valid_unicode!(_abc);
starting_invalid_unicode!(_abc);
ending_number!(_abc);
ending_valid_unicode!(_abc);
ending_invalid_unicode!(_abc);
unsupported_literals!(_abc);
empty!();
bad_literal_string!("\u{00BD}");
bad_literal_string!("\x41");
bad_literal_string!("🤷");
bad_literal_string!("d[-_-]b");
bad_literal_string!("-1");
bad_literal_string!("1.0");
bad_literal_string!("'1'");
bad_literal_non_string!(-1);
bad_literal_non_string!(1.0);
bad_literal_non_string!('1');
bad_literal_non_string!(false);
bad_literal_non_string!(4f64);
bad_literal_non_string!(5u8);
bad_literal_non_string!(6_u8);
bad_tt_literal!(1.0);
bad_tt_literal!('1');
}
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