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macro_metavar_expr_concat: explain why idents are invalid

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mejrs
2026-04-25 19:56:05 +02:00
parent acb65f36a0
commit b6c6dd1fa0
6 changed files with 139 additions and 52 deletions
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compiler/rustc_expand/src/errors.rs
+43
View File
@@ -545,6 +545,49 @@ pub(crate) struct MveUnrecognizedVar {
pub span: Span,
pub key: MacroRulesNormalizedIdent,
}
#[derive(Diagnostic)]
#[diag(r#"`${"{"}concat(..){"}"}` is not generating a valid identifier"#)]
pub(crate) struct ConcatInvalidIdent {
#[primary_span]
pub span: Span,
#[subdiagnostic]
pub reason: InvalidIdentReason,
}
#[derive(Subdiagnostic)]
pub(crate) enum InvalidIdentReason {
#[note(r#"this `${"{"}concat(..){"}"}` invocation generated an empty ident"#)]
Empty,
#[note(r#"this `${"{"}concat(..){"}"}` invocation generated `{$symbol}`, but {$start} is neither '_' nor XID_Start"#)]
#[note(
"see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers"
)]
InvalidStart { symbol: Symbol, start: char },
#[note(r#"this `${"{"}concat(..){"}"}` invocation generated `{$symbol}`, but {$not_continue} is not XID_Continue"#)]
#[note(
"see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers"
)]
InvalidContinue { symbol: Symbol, not_continue: char },
}
impl InvalidIdentReason {
pub(crate) fn new(symbol: Symbol) -> Self {
let mut chars = symbol.as_str().chars();
if let Some(start) = chars.next() {
if rustc_lexer::is_id_start(start) {
let not_continue = chars
.find(|c| !rustc_lexer::is_id_continue(*c))
.expect("InvalidIdentReason: cannot find invalid ident reason");
InvalidIdentReason::InvalidContinue { symbol, not_continue }
} else {
InvalidIdentReason::InvalidStart { symbol, start }
}
} else {
InvalidIdentReason::Empty
}
}
}
}
#[derive(Diagnostic)]
compiler/rustc_expand/src/mbe/transcribe.rs
+8 -7
View File
@@ -18,9 +18,10 @@
use smallvec::{SmallVec, smallvec};
use crate::errors::{
CountRepetitionMisplaced, MacroVarStillRepeating, MetaVarsDifSeqMatchers, MustRepeatOnce,
MveUnrecognizedVar, NoRepeatableVar, NoSyntaxVarsExprRepeat, VarNoTypo,
VarTypoSuggestionRepeatable, VarTypoSuggestionUnrepeatable, VarTypoSuggestionUnrepeatableLabel,
ConcatInvalidIdent, CountRepetitionMisplaced, InvalidIdentReason, MacroVarStillRepeating,
MetaVarsDifSeqMatchers, MustRepeatOnce, MveUnrecognizedVar, NoRepeatableVar,
NoSyntaxVarsExprRepeat, VarNoTypo, VarTypoSuggestionRepeatable, VarTypoSuggestionUnrepeatable,
VarTypoSuggestionUnrepeatableLabel,
};
use crate::mbe::macro_parser::NamedMatch;
use crate::mbe::macro_parser::NamedMatch::*;
@@ -656,10 +657,10 @@ fn metavar_expr_concat<'tx>(
let symbol = nfc_normalize(&concatenated);
let concatenated_span = tscx.visited_dspan(dspan);
if !rustc_lexer::is_ident(symbol.as_str()) {
return Err(dcx.struct_span_err(
concatenated_span,
"`${concat(..)}` is not generating a valid identifier",
));
return Err(dcx.create_err(ConcatInvalidIdent {
span: concatenated_span,
reason: InvalidIdentReason::new(symbol),
}));
}
tscx.psess.symbol_gallery.insert(symbol, concatenated_span);
tests/ui/macros/metavar-expressions/concat-trace-errors.rs
+10
View File
@@ -16,18 +16,28 @@ macro_rules! post_expansion {
($a:literal) => {
const _: () = ${concat("hi", $a, "bye")};
//~^ ERROR is not generating a valid identifier
//~| NOTE this `${concat(..)}` invocation generated `hi!bye`, but '!' is not XID_Continue
//~| NOTE see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
}
}
post_expansion!("!");
//~^ NOTE in this expansion of post_expansion!
//~| NOTE in this expansion of post_expansion!
//~| NOTE in this expansion of post_expansion!
macro_rules! post_expansion_many {
($a:ident, $b:ident, $c:ident, $d:literal, $e:ident) => {
const _: () = ${concat($a, $b, $c, $d, $e)};
//~^ ERROR is not generating a valid identifier
//~| NOTE this `${concat(..)}` invocation generated `abc.de`, but '.' is not XID_Continue
//~| NOTE see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
}
}
post_expansion_many!(a, b, c, ".d", e);
//~^ NOTE in this expansion of post_expansion_many!
//~| NOTE in this expansion of post_expansion_many!
//~| NOTE in this expansion of post_expansion_many!
fn main() {}
tests/ui/macros/metavar-expressions/concat-trace-errors.stderr
+5 -1
View File
@@ -7,10 +7,12 @@ LL | const _: () = ${concat("hi", $a, "bye")};
LL | post_expansion!("!");
| -------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `hi!bye`, but '!' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `post_expansion` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-trace-errors.rs:26:24
--> $DIR/concat-trace-errors.rs:31:24
|
LL | const _: () = ${concat($a, $b, $c, $d, $e)};
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -18,6 +20,8 @@ LL | const _: () = ${concat($a, $b, $c, $d, $e)};
LL | post_expansion_many!(a, b, c, ".d", e);
| -------------------------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `abc.de`, but '.' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `post_expansion_many` (in Nightly builds, run with -Z macro-backtrace for more info)
error: aborting due to 2 previous errors
tests/ui/macros/metavar-expressions/concat-usage-errors.rs
+8
View File
@@ -1,4 +1,5 @@
//@ edition: 2021
//@ dont-require-annotations: NOTE
#![feature(macro_metavar_expr_concat)]
@@ -43,6 +44,7 @@ macro_rules! starting_number {
($ident:ident) => {{
let ${concat("1", $ident)}: () = ();
//~^ ERROR `${concat(..)}` is not generating a valid identifier
//~| NOTE this `${concat(..)}` invocation generated `1_abc`, but '1' is neither '_' nor XID_Start
}};
}
@@ -56,6 +58,8 @@ macro_rules! starting_invalid_unicode {
($ident:ident) => {{
let ${concat("\u{00BD}", $ident)}: () = ();
//~^ ERROR `${concat(..)}` is not generating a valid identifier
//~| NOTE this `${concat(..)}` invocation generated `\u{00BD}_abc`, but '\' is neither '_' nor XID_Start
//~| NOTE see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
}};
}
@@ -75,6 +79,7 @@ macro_rules! ending_invalid_unicode {
($ident:ident) => {{
let ${concat($ident, "\u{00BD}")}: () = ();
//~^ ERROR `${concat(..)}` is not generating a valid identifier
//~| NOTE this `${concat(..)}` invocation generated `_abc\u{00BD}`, but '\' is not XID_Continue
}};
}
@@ -82,6 +87,7 @@ macro_rules! empty {
() => {{
let ${concat("", "")}: () = ();
//~^ ERROR `${concat(..)}` is not generating a valid identifier
//~| NOTE this `${concat(..)}` invocation generated an empty ident
}};
}
@@ -130,6 +136,8 @@ macro_rules! bad_literal_string {
//~| ERROR `${concat(..)}` is not generating a valid identifier
//~| ERROR `${concat(..)}` is not generating a valid identifier
//~| ERROR `${concat(..)}` is not generating a valid identifier
//~| NOTE this `${concat(..)}` invocation generated `_foo🤷`, but '🤷' is not XID_Continue
//~| NOTE this `${concat(..)}` invocation generated `_foo-1`, but '-' is not XID_Continue
}
}
tests/ui/macros/metavar-expressions/concat-usage-errors.stderr
+65 -44
View File
@@ -1,131 +1,131 @@
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:7:10
--> $DIR/concat-usage-errors.rs:8:10
|
LL | ${concat()}
| ^^^^^^^^^^
error: `concat` must have at least two elements
--> $DIR/concat-usage-errors.rs:10:11
--> $DIR/concat-usage-errors.rs:11:11
|
LL | ${concat(aaaa)}
| ^^^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:13:10
--> $DIR/concat-usage-errors.rs:14:10
|
LL | ${concat(aaaa,)}
| ^^^^^^^^^^^^^^^
error: expected comma
--> $DIR/concat-usage-errors.rs:18:10
--> $DIR/concat-usage-errors.rs:19:10
|
LL | ${concat(aaaa aaaa)}
| ^^^^^^^^^^^^^^^^^^^
error: `concat` must have at least two elements
--> $DIR/concat-usage-errors.rs:21:11
--> $DIR/concat-usage-errors.rs:22:11
|
LL | ${concat($ex)}
| ^^^^^^
error: expected comma
--> $DIR/concat-usage-errors.rs:27:10
--> $DIR/concat-usage-errors.rs:28:10
|
LL | ${concat($ex, aaaa 123)}
| ^^^^^^^^^^^^^^^^^^^^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:30:10
--> $DIR/concat-usage-errors.rs:31:10
|
LL | ${concat($ex, aaaa,)}
| ^^^^^^^^^^^^^^^^^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:90:26
--> $DIR/concat-usage-errors.rs:96:26
|
LL | let ${concat(_a, 'b')}: () = ();
| ^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:93:26
--> $DIR/concat-usage-errors.rs:99:26
|
LL | let ${concat(_a, 1)}: () = ();
| ^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:95:26
--> $DIR/concat-usage-errors.rs:101:26
|
LL | let ${concat(_a, 1.5)}: () = ();
| ^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:97:26
--> $DIR/concat-usage-errors.rs:103:26
|
LL | let ${concat(_a, c"hi")}: () = ();
| ^^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:99:26
--> $DIR/concat-usage-errors.rs:105:26
|
LL | let ${concat(_a, b"hi")}: () = ();
| ^^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:101:26
--> $DIR/concat-usage-errors.rs:107:26
|
LL | let ${concat(_a, b'b')}: () = ();
| ^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:103:26
--> $DIR/concat-usage-errors.rs:109:26
|
LL | let ${concat(_a, b'b')}: () = ();
| ^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:106:30
--> $DIR/concat-usage-errors.rs:112:30
|
LL | let ${concat($ident, 'b')}: () = ();
| ^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:108:30
--> $DIR/concat-usage-errors.rs:114:30
|
LL | let ${concat($ident, 1)}: () = ();
| ^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:110:30
--> $DIR/concat-usage-errors.rs:116:30
|
LL | let ${concat($ident, 1.5)}: () = ();
| ^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:112:30
--> $DIR/concat-usage-errors.rs:118:30
|
LL | let ${concat($ident, c"hi")}: () = ();
| ^^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:114:30
--> $DIR/concat-usage-errors.rs:120:30
|
LL | let ${concat($ident, b"hi")}: () = ();
| ^^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:116:30
--> $DIR/concat-usage-errors.rs:122:30
|
LL | let ${concat($ident, b'b')}: () = ();
| ^^^^
error: expected identifier or string literal
--> $DIR/concat-usage-errors.rs:118:30
--> $DIR/concat-usage-errors.rs:124:30
|
LL | let ${concat($ident, b'b')}: () = ();
| ^^^^
error: metavariables of `${concat(..)}` must be of type `ident`, `literal` or `tt`
--> $DIR/concat-usage-errors.rs:24:19
--> $DIR/concat-usage-errors.rs:25:19
|
LL | ${concat($ex, aaaa)}
| ^^
@@ -133,13 +133,13 @@ LL | ${concat($ex, aaaa)}
= note: currently only string and integer literals are supported
error: variable `foo` is not recognized in meta-variable expression
--> $DIR/concat-usage-errors.rs:37:30
--> $DIR/concat-usage-errors.rs:38:30
|
LL | const ${concat(FOO, $foo)}: i32 = 2;
| ^^^
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:44:14
--> $DIR/concat-usage-errors.rs:45:14
|
LL | let ${concat("1", $ident)}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^
@@ -147,10 +147,12 @@ LL | let ${concat("1", $ident)}: () = ();
LL | starting_number!(_abc);
| ---------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `1_abc`, but '1' is neither '_' nor XID_Start
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `starting_number` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:57:14
--> $DIR/concat-usage-errors.rs:59:14
|
LL | let ${concat("\u{00BD}", $ident)}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -158,10 +160,12 @@ LL | let ${concat("\u{00BD}", $ident)}: () = ();
LL | starting_invalid_unicode!(_abc);
| ------------------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `\u{00BD}_abc`, but '\' is neither '_' nor XID_Start
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `starting_invalid_unicode` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:76:14
--> $DIR/concat-usage-errors.rs:80:14
|
LL | let ${concat($ident, "\u{00BD}")}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
@@ -169,10 +173,12 @@ LL | let ${concat($ident, "\u{00BD}")}: () = ();
LL | ending_invalid_unicode!(_abc);
| ----------------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `_abc\u{00BD}`, but '\' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `ending_invalid_unicode` (in Nightly builds, run with -Z macro-backtrace for more info)
error: expected pattern, found `$`
--> $DIR/concat-usage-errors.rs:90:13
--> $DIR/concat-usage-errors.rs:96:13
|
LL | let ${concat(_a, 'b')}: () = ();
| ^ expected pattern
@@ -183,7 +189,7 @@ LL | unsupported_literals!(_abc);
= note: this error originates in the macro `unsupported_literals` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:83:14
--> $DIR/concat-usage-errors.rs:88:14
|
LL | let ${concat("", "")}: () = ();
| ^^^^^^^^^^^^^^^^
@@ -191,10 +197,11 @@ LL | let ${concat("", "")}: () = ();
LL | empty!();
| -------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated an empty ident
= note: this error originates in the macro `empty` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:125:16
--> $DIR/concat-usage-errors.rs:131:16
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^
@@ -202,10 +209,12 @@ LL | const ${concat(_foo, $literal)}: () = ();
LL | bad_literal_string!("\u{00BD}");
| ------------------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `_foo\u{00BD}`, but '\' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `bad_literal_string` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:125:16
--> $DIR/concat-usage-errors.rs:131:16
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^
@@ -213,10 +222,12 @@ LL | const ${concat(_foo, $literal)}: () = ();
LL | bad_literal_string!("\x41");
| --------------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `_foo\x41`, but '\' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `bad_literal_string` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:125:16
--> $DIR/concat-usage-errors.rs:131:16
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^
@@ -224,10 +235,12 @@ LL | const ${concat(_foo, $literal)}: () = ();
LL | bad_literal_string!("🤷");
| ------------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `_foo🤷`, but '🤷' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `bad_literal_string` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:125:16
--> $DIR/concat-usage-errors.rs:131:16
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^
@@ -235,10 +248,12 @@ LL | const ${concat(_foo, $literal)}: () = ();
LL | bad_literal_string!("d[-_-]b");
| ------------------------------ in this macro invocation
|
= note: this `${concat(..)}` invocation generated `_food[-_-]b`, but '[' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `bad_literal_string` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:125:16
--> $DIR/concat-usage-errors.rs:131:16
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^
@@ -246,10 +261,12 @@ LL | const ${concat(_foo, $literal)}: () = ();
LL | bad_literal_string!("-1");
| ------------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `_foo-1`, but '-' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `bad_literal_string` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:125:16
--> $DIR/concat-usage-errors.rs:131:16
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^
@@ -257,10 +274,12 @@ LL | const ${concat(_foo, $literal)}: () = ();
LL | bad_literal_string!("1.0");
| -------------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `_foo1.0`, but '.' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `bad_literal_string` (in Nightly builds, run with -Z macro-backtrace for more info)
error: `${concat(..)}` is not generating a valid identifier
--> $DIR/concat-usage-errors.rs:125:16
--> $DIR/concat-usage-errors.rs:131:16
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^^^^^^^^^^^^^^^^^^
@@ -268,10 +287,12 @@ LL | const ${concat(_foo, $literal)}: () = ();
LL | bad_literal_string!("'1'");
| -------------------------- in this macro invocation
|
= note: this `${concat(..)}` invocation generated `_foo'1'`, but '\'' is not XID_Continue
= note: see <https://doc.rust-lang.org/reference/identifiers.html> for the definition of valid identifiers
= note: this error originates in the macro `bad_literal_string` (in Nightly builds, run with -Z macro-backtrace for more info)
error: metavariables of `${concat(..)}` must be of type `ident`, `literal` or `tt`
--> $DIR/concat-usage-errors.rs:138:31
--> $DIR/concat-usage-errors.rs:146:31
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^
@@ -279,7 +300,7 @@ LL | const ${concat(_foo, $literal)}: () = ();
= note: currently only string and integer literals are supported
error: metavariables of `${concat(..)}` must be of type `ident`, `literal` or `tt`
--> $DIR/concat-usage-errors.rs:138:31
--> $DIR/concat-usage-errors.rs:146:31
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^
@@ -288,7 +309,7 @@ LL | const ${concat(_foo, $literal)}: () = ();
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: metavariables of `${concat(..)}` must be of type `ident`, `literal` or `tt`
--> $DIR/concat-usage-errors.rs:138:31
--> $DIR/concat-usage-errors.rs:146:31
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^
@@ -297,7 +318,7 @@ LL | const ${concat(_foo, $literal)}: () = ();
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: metavariables of `${concat(..)}` must be of type `ident`, `literal` or `tt`
--> $DIR/concat-usage-errors.rs:138:31
--> $DIR/concat-usage-errors.rs:146:31
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^
@@ -306,19 +327,19 @@ LL | const ${concat(_foo, $literal)}: () = ();
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: floats are not supported as metavariables of `${concat(..)}`
--> $DIR/concat-usage-errors.rs:138:31
--> $DIR/concat-usage-errors.rs:146:31
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^
error: integer metavariables of `${concat(..)}` must not be suffixed
--> $DIR/concat-usage-errors.rs:138:31
--> $DIR/concat-usage-errors.rs:146:31
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^
error: integer metavariables of `${concat(..)}` must not be suffixed
--> $DIR/concat-usage-errors.rs:138:31
--> $DIR/concat-usage-errors.rs:146:31
|
LL | const ${concat(_foo, $literal)}: () = ();
| ^^^^^^^
@@ -326,7 +347,7 @@ LL | const ${concat(_foo, $literal)}: () = ();
= note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
error: metavariables of `${concat(..)}` must be of type `ident`, `literal` or `tt`
--> $DIR/concat-usage-errors.rs:151:31
--> $DIR/concat-usage-errors.rs:159:31
|
LL | const ${concat(_foo, $tt)}: () = ();
| ^^
@@ -334,7 +355,7 @@ LL | const ${concat(_foo, $tt)}: () = ();
= note: currently only string and integer literals are supported
error: metavariables of `${concat(..)}` must be of type `ident`, `literal` or `tt`
--> $DIR/concat-usage-errors.rs:151:31
--> $DIR/concat-usage-errors.rs:159:31
|
LL | const ${concat(_foo, $tt)}: () = ();
| ^^