6b24fdf811
``` error: unconstrained generic constant --> $DIR/const-argument-if-length.rs:18:10 | LL | pad: [u8; is_zst::<T>()], | ^^^^^^^^^^^^^^^^^^^ | help: try adding a `where` bound | LL | pub struct AtLeastByte<T: ?Sized> where [(); is_zst::<T>()]: { | ++++++++++++++++++++++++++ ``` Detect when the constant expression isn't `usize` and suggest casting: ``` error: unconstrained generic constant --> f300.rs:6:10 | 6 | bb::<{!N}>(); | ^^^^ -Ztrack-diagnostics: created at compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs:3539:36 | help: try adding a `where` bound | 5 | fn b<const N: bool>() where [(); {!N} as usize]: { | ++++++++++++++++++++++++++ ``` Fix #122395.
25 lines
953 B
Plaintext
25 lines
953 B
Plaintext
error: unconstrained generic constant
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--> $DIR/generic-expr-default.rs:5:54
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LL | pub fn needs_evaluatable_bound<const N1: usize>() -> Foo<N1> {
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| ^^^^^^^
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help: try adding a `where` bound
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LL | pub fn needs_evaluatable_bound<const N1: usize>() -> Foo<N1> where [(); { N + 1 }]: {
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| ++++++++++++++++++++++
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error: unconstrained generic constant
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--> $DIR/generic-expr-default.rs:14:58
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LL | fn needs_evaluatable_bound_alias<T, const N: usize>() -> FooAlias<N>
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| ^^^^^^^^^^^
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help: try adding a `where` bound
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LL | fn needs_evaluatable_bound_alias<T, const N: usize>() -> FooAlias<N> where [(); { N + 1 }]:
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| ++++++++++++++++++++++
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error: aborting due to 2 previous errors
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