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Suggest const_fn_transmute instead of const_fn

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This commit is contained in:
Dylan MacKenzie 2020-09-24 11:11:53 -07:00
parent a6008fac97
commit ebf024bba8
1 changed files with 8 additions and 1 deletions
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9
compiler/rustc_mir/src/transform/check_consts/ops.rs
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@ -489,7 +489,14 @@ impl NonConstOp for Transmute {
} }
fn emit_error(&self, ccx: &ConstCx<'_, '_>, span: Span) { fn emit_error(&self, ccx: &ConstCx<'_, '_>, span: Span) {
mcf_emit_error(ccx, span, "can only call `transmute` from const items, not `const fn`"); feature_err(
&ccx.tcx.sess.parse_sess,
sym::const_fn_transmute,
span,
&format!("`transmute` is not allowed in {}s", ccx.const_kind()),
)
.note("`transmute` is only allowed in constants and statics for now")
.emit();
} }
} }