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c93a0e5e42
See arena.h for discussion of what canonicalization means in this context. This is primarily intended to support implementing a memo table of template instantiations to resolve #2951, but could be useful for other purposes as well. Additional changes: - Pass `VTable` constructor parameters by pointer, to avoid the need to define `operator==` and `hash_value` for it. - Clean up the recurring pattern of allocating identical `NamedElement`s on the stack and heap. Instead we always allocate it on the heap and pass it by pointer. - Add `Print()` and `Dump()` to `Bindings` as a debugging convenience. --------- Co-authored-by: Jon Ross-Perkins <jperkins@google.com> Co-authored-by: Richard Smith <richard@metafoo.co.uk>
40 lines
931 B
C++
40 lines
931 B
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 "explorer/common/decompose.h"
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#include <gtest/gtest.h>
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namespace Carbon {
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namespace {
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struct Decomposeable : public HashFromDecompose<Decomposeable> {
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template <typename F>
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auto Decompose(F f) const {
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return f(i, s);
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}
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int i = 0;
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std::string s;
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};
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TEST(HashFromDecomposeTest, EqualValues) {
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Decomposeable d1 = {.i = 42, .s = "foo"};
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Decomposeable d2 = {.i = 42, .s = "foo"};
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EXPECT_TRUE(d1 == d2);
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EXPECT_TRUE(hash_value(d1) == hash_value(d2));
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}
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TEST(HashFromDecomposeTest, NonEqualValues) {
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Decomposeable d1 = {.i = 42, .s = "foo"};
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Decomposeable d2 = {.i = 42, .s = "bar"};
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EXPECT_FALSE(d1 == d2);
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EXPECT_FALSE(hash_value(d1) == hash_value(d2));
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}
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} // namespace
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} // namespace Carbon
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