bjoernager/rust
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suggest lazy-static for non-const statics

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This commit is contained in:
cameron 2022-08-14 23:07:47 +01:00
parent 75b7e52e92
commit 34e0d9a0bb
9 changed files with 14 additions and 0 deletions
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5
compiler/rustc_const_eval/src/transform/check_consts/ops.rs
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@ -1,6 +1,7 @@
//! Concrete error types for all operations which may be invalid in a certain const context.
use hir::def_id::LocalDefId;
use hir::ConstContext;
use rustc_errors::{
error_code, struct_span_err, Applicability, DiagnosticBuilder, ErrorGuaranteed,
};
@ -331,6 +332,10 @@ impl<'tcx> NonConstOp<'tcx> for FnCallNonConst<'tcx> {
ccx.const_kind(),
));
if let ConstContext::Static(_) = ccx.const_kind() {
err.note("consider wrapping this expression in `Lazy::new(|| ...)` from the `once_cell` crate: https://crates.io/crates/once_cell");
}
err
}
}