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https://github.com/carbon-language/carbon-lang.git
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Richard Smith
19532967fa
This fake generic was used for two reasons: - The declaration name stack assumes that each declaration name is processed within a generic scope. This is important if the name might have generic parameters, which are always parsed even for declarations that disallow them in check. - Out-of-line redeclarations of generic entities produce instructions with symbolic constant values in non-generic scopes. The former case is addressed by pushing a generic each time we start a declaration name, even if we will reject generic parameters later. The latter case is worked around for now by not building a symbolic constant type or value for instructions that appear outside of any generic, and will be addressed more completely by #5310 and follow-ups.
37 lines
1.2 KiB
C++
37 lines
1.2 KiB
C++
// 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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#include "toolchain/check/generic_region_stack.h"
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namespace Carbon::Check {
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auto GenericRegionStack::Push() -> void { dependent_insts_stack_.PushArray(); }
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auto GenericRegionStack::Pop() -> void { dependent_insts_stack_.PopArray(); }
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auto GenericRegionStack::AddDependentInst(DependentInst inst) -> void {
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if (dependent_insts_stack_.empty()) {
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// If we don't have a generic region here, leave the dependent instruction
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// unattached. This happens for out-of-line redeclarations of members of
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// dependent scopes:
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//
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// class A(T:! type) {
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// fn F();
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// }
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// // Has generic type and constant value, but no generic region.
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// fn A(T:! type).F() {}
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//
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// TODO: Use a different instruction kind for out-of-line definitions and
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// CHECK this doesn't happen.
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return;
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}
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dependent_insts_stack_.AppendToTop(inst);
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}
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auto GenericRegionStack::PeekDependentInsts() -> llvm::ArrayRef<DependentInst> {
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return dependent_insts_stack_.PeekArray();
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}
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} // namespace Carbon::Check
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