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https://github.com/carbon-language/carbon-lang.git
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Nicholas Bishop
f2d0c4d0ae
Add `ExportVarToCpp`. This checks the `clang_decls` mapping and returns an existing decl if found. Otherwise, it creates a new `VarDecl` and adds it to the `clang_decls` mapping. When lowering, in `FileContext::BuildGlobalVariableDecl`, the `clang_decls` mapping is used to lookup an existing `llvm::GlobalVariable` for the instruction. If found, use that rather than creating a new one to avoid an unwanted second definition in the llvm IR.
62 lines
1.3 KiB
Plaintext
62 lines
1.3 KiB
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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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/full.carbon
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// EXTRA-ARGS: --clang-arg=--std=c++20
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interop/cpp/var/import/constexpr.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/var/import/constexpr.carbon
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// --- bool.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''
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constexpr bool b = true;
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''';
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class C(B:! bool) {}
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fn F() -> C(Cpp.b);
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let x: C(true) = F();
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// --- int.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''
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constexpr int i = 123;
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''';
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class C(I:! i32) {}
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fn F() -> C(Cpp.i);
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let x: C(123) = F();
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// --- float.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''
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constexpr float flt = 123.5;
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''';
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class C(V:! f32) {}
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fn F() -> C(Cpp.flt);
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let x: C(123.5) = F();
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// --- pointer.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''
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int i = 123;
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constexpr int* _Nonnull ptr = &i;
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''';
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class C(V:! i32*) {}
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fn F() -> C(Cpp.ptr);
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let x: C(&Cpp.i) = F();
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