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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
9feff92f22
Change explorer's handling of witnesses to track them wherever possible. Associated constant support needs witnesses to be available much more pervasively. The main changes here are: - `Substitute` now takes a set of bindings covering both `Value`s for `GenericBinding`s and `Witness`es for `ImplBinding`s, and substitutes both. - Witnesses are now tracked within `ConstraintType`s. The `.Self` type has an `ImplBinding` that self-references from parts of the constraint to other parts of the constraint can use to access the witness for the constraint. - The constraint type for an `impl` and for a `GenericBinding` are now stored in pre-substituted form, with references to the actual constrained type rather than symbolic references to `.Self`. This results in minor changes in diagnostic text. Argument deduction still performs substitutions without remapping witnesses.
20 lines
678 B
Plaintext
20 lines
678 B
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// RUN: %{not} %{explorer} %s 2>&1 | %{FileCheck-strict} %s
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// RUN: %{not} %{explorer-trace} %s 2>&1 | %{FileCheck-allow-unmatched} %s
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// AUTOUPDATE: %{explorer} %s
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package ExplorerTest api;
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fn id[T:! Type](x: T) -> T {
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// CHECK:COMPILATION ERROR: {{.*}}/explorer/testdata/generic_function/fail_not_addable.carbon:[[@LINE+2]]: type error in `+`:
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// CHECK:could not find implementation of interface AddWith(U = i32) for T
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return x + 0;
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}
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fn Main() -> i32 {
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return id(0);
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}
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