mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Nicholas Bishop
069c6f4447
For integral and float types, `TryEvaluateMacroToConstant` now calls `MapAPValueToConstant` to directly convert from an APValue, rather than converting the `APValue` to an expression and importing it with `MapConstant`. `MapConstant` is still used, but only for string literals and nullptrs. Since it's only used by `TryEvaluateMacroToConstant`, moved it to `macros.cpp` and removed the code for other types of expressions.
43 lines
1.4 KiB
C++
43 lines
1.4 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/cpp/constant.h"
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#include "toolchain/check/cpp/import.h"
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#include "toolchain/check/eval.h"
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namespace Carbon::Check {
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auto MapAPValueToConstant(Context& context, SemIR::LocId loc_id,
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const clang::APValue& ap_value, clang::QualType type)
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-> SemIR::ConstantId {
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SemIR::TypeId type_id = ImportCppType(context, loc_id, type).type_id;
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if (!type_id.has_value()) {
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return SemIR::ConstantId::NotConstant;
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}
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if (ap_value.isInt()) {
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if (type->isBooleanType()) {
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auto value = SemIR::BoolValue::From(!ap_value.getInt().isZero());
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return TryEvalInst(
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context, SemIR::BoolLiteral{.type_id = type_id, .value = value});
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} else {
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CARBON_CHECK(type->isIntegralOrEnumerationType());
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IntId int_id = context.ints().Add(ap_value.getInt());
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return TryEvalInst(context,
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SemIR::IntValue{.type_id = type_id, .int_id = int_id});
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}
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} else if (ap_value.isFloat()) {
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FloatId float_id = context.floats().Add(ap_value.getFloat());
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return TryEvalInst(
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context, SemIR::FloatValue{.type_id = type_id, .float_id = float_id});
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} else {
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// TODO: support other types.
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return SemIR::ConstantId::NotConstant;
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}
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}
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} // namespace Carbon::Check
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