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Create a Clang module per Carbon file. (#7594)

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This isolates the C++ imports in different Carbon files from each other
in `--share-cpp-ast` mode, so that a Carbon file can only see the
portions of the shared Clang `ASTContext` that it actually imported.

Assisted-by: Gemini via Antigravity
This commit is contained in:
Richard Smith
2026-07-31 22:43:56 +00:00
committed by GitHub
parent a5f3d45717
commit 46b5482bb4
7 changed files with 187 additions and 77 deletions
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toolchain/check/testdata/interop/cpp/function/export/thunk_ast.carbon
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+11 -10
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@@ -38,16 +38,17 @@ fn F(i: i32) -> i32 {
// CHECK:STDOUT: | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:21> 'int' lvalue Var {{0x[a-f0-9]+}} 'return_storage' 'int'
// CHECK:STDOUT: | |-AlwaysInlineAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit always_inline
// CHECK:STDOUT: | `-InternalLinkageAttr {{0x[a-f0-9]+}} <<invalid sloc>> Implicit
// CHECK:STDOUT: `-FunctionDecl {{0x[a-f0-9]+}} <line:37:1, line:39:1> line:37:5 G 'int (int)' external-linkage
// CHECK:STDOUT: |-ParmVarDecl {{0x[a-f0-9]+}} <col:7, col:11> col:11 used i 'int'
// CHECK:STDOUT: `-CompoundStmt {{0x[a-f0-9]+}} <col:14, line:39:1>
// CHECK:STDOUT: `-ReturnStmt {{0x[a-f0-9]+}} <line:38:3, col:21>
// CHECK:STDOUT: `-CallExpr {{0x[a-f0-9]+}} <col:10, col:21> 'int'
// CHECK:STDOUT: |-ImplicitCastExpr {{0x[a-f0-9]+}} <col:10, col:18> 'int (*)(int)' <FunctionToPointerDecay>
// CHECK:STDOUT: | `-DeclRefExpr {{0x[a-f0-9]+}} <col:10, col:18> 'int (int)' lvalue Function {{0x[a-f0-9]+}} 'F' 'int (int)'
// CHECK:STDOUT: | `-NestedNameSpecifier Namespace {{0x[a-f0-9]+}} 'Carbon'
// CHECK:STDOUT: `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:20> 'int' <LValueToRValue>
// CHECK:STDOUT: `-DeclRefExpr {{0x[a-f0-9]+}} <col:20> 'int' lvalue ParmVar {{0x[a-f0-9]+}} 'i' 'int'
// CHECK:STDOUT: |-FunctionDecl {{0x[a-f0-9]+}} <line:38:1, line:40:1> line:38:5 in thunk_with_args_and_return.carbon hidden G 'int (int)' external-linkage
// CHECK:STDOUT: | |-ParmVarDecl {{0x[a-f0-9]+}} <col:7, col:11> col:11 in thunk_with_args_and_return.carbon hidden used i 'int'
// CHECK:STDOUT: | `-CompoundStmt {{0x[a-f0-9]+}} <col:14, line:40:1>
// CHECK:STDOUT: | `-ReturnStmt {{0x[a-f0-9]+}} <line:39:3, col:21>
// CHECK:STDOUT: | `-CallExpr {{0x[a-f0-9]+}} <col:10, col:21> 'int'
// CHECK:STDOUT: | |-ImplicitCastExpr {{0x[a-f0-9]+}} <col:10, col:18> 'int (*)(int)' <FunctionToPointerDecay>
// CHECK:STDOUT: | | `-DeclRefExpr {{0x[a-f0-9]+}} <col:10, col:18> 'int (int)' lvalue Function {{0x[a-f0-9]+}} 'F' 'int (int)'
// CHECK:STDOUT: | | `-NestedNameSpecifier Namespace {{0x[a-f0-9]+}} 'Carbon'
// CHECK:STDOUT: | `-ImplicitCastExpr {{0x[a-f0-9]+}} <col:20> 'int' <LValueToRValue>
// CHECK:STDOUT: | `-DeclRefExpr {{0x[a-f0-9]+}} <col:20> 'int' lvalue ParmVar {{0x[a-f0-9]+}} 'i' 'int'
// CHECK:STDOUT: `-ImportDecl {{0x[a-f0-9]+}} <line:41:4> col:4 in thunk_with_args_and_return.carbon implicit thunk_with_args_and_return.carbon
return i;
}