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Error evaluating symbolic tuple (#2957)

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Reports an error (`value of generic binding T is not known`) instead of
performing an invalid cast when attempting to index into a tuple. Can
occur when trying to cast a generic constant in the interface position
of an implementation to `type`.

Closes #2938
This commit is contained in:
josh11b
2023-06-29 00:37:13 +00:00
committed by GitHub
parent f091a45c19
commit 798233fe23
3 changed files with 35 additions and 1 deletions
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explorer/testdata/impl/fail_impl_as_symbolic.carbon
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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
package ExplorerTest api;
// CHECK:STDERR: COMPILATION ERROR: fail_impl_as_symbolic.carbon:[[@LINE+1]]: value of generic binding T is not known
impl forall [T:! ({}, )] {} as T {
}
fn Main() -> i32 {
}
explorer/testdata/impl/fail_impl_symbolic_as.carbon
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// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
package ExplorerTest api;
interface X {
}
// CHECK:STDERR: COMPILATION ERROR: fail_impl_symbolic_as.carbon:[[@LINE+1]]: value of generic binding Y is not known
impl forall [Y:! (X, )] Y as true {
}
fn Main() -> i32 {
}