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[interop][SwiftToCxx] add support for emitting Swift stdlib dependency in one header file

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This is the default behavior. You can disable this by specifying the -clang-header-expose-decls= flag explicitly when generating the header
This commit is contained in:
Alex Lorenz
2022-09-28 08:06:13 -07:00
parent 1d66c339f6
commit 3a9b6dce9d
108 changed files with 203 additions and 165 deletions
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21
lib/PrintAsClang/ModuleContentsWriter.cpp
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@@ -134,6 +134,7 @@ class ModuleWriter {
llvm::raw_string_ostream outOfLineDefinitionsOS;
DeclAndTypePrinter printer;
OutputLanguageMode outputLangMode;
bool dependsOnStdlib = false;
public:
ModuleWriter(raw_ostream &os, raw_ostream &prologueOS,
@@ -149,6 +150,11 @@ public:
PrimitiveTypeMapping &getTypeMapping() { return typeMapping; }
/// Returns true if a Stdlib dependency was seen during the emission of this module.
bool isStdlibRequired() const {
return dependsOnStdlib;
}
/// Returns true if we added the decl's module to the import set, false if
/// the decl is a local decl.
///
@@ -159,8 +165,10 @@ public:
if (otherModule == &M)
return false;
if (otherModule->isStdlibModule() ||
otherModule->isBuiltinModule())
if (otherModule->isStdlibModule()) {
dependsOnStdlib = true;
return true;
} else if (otherModule->isBuiltinModule())
return true;
// Don't need a module for SIMD types in C.
if (otherModule->getName() == M.getASTContext().Id_simd)
@@ -734,20 +742,22 @@ void swift::printModuleContentsAsObjC(
.write();
}
void swift::printModuleContentsAsCxx(
raw_ostream &os, llvm::SmallPtrSetImpl<ImportModuleTy> &imports,
EmittedClangHeaderDependencyInfo swift::printModuleContentsAsCxx(
raw_ostream &os,
ModuleDecl &M, SwiftToClangInteropContext &interopContext,
bool requiresExposedAttribute) {
std::string moduleContentsBuf;
llvm::raw_string_ostream moduleOS{moduleContentsBuf};
std::string modulePrologueBuf;
llvm::raw_string_ostream prologueOS{modulePrologueBuf};
EmittedClangHeaderDependencyInfo info;
// FIXME: Use getRequiredAccess once @expose is supported.
ModuleWriter writer(moduleOS, prologueOS, imports, M, interopContext,
ModuleWriter writer(moduleOS, prologueOS, info.imports, M, interopContext,
AccessLevel::Public, requiresExposedAttribute,
OutputLanguageMode::Cxx);
writer.write();
info.dependsOnStandardLibrary = writer.isStdlibRequired();
os << "#ifndef SWIFT_PRINTED_CORE\n";
os << "#define SWIFT_PRINTED_CORE\n";
@@ -778,4 +788,5 @@ void swift::printModuleContentsAsCxx(
ClangSyntaxPrinter(os).printNamespace(
[&](raw_ostream &os) { M.ValueDecl::getName().print(os); },
[&](raw_ostream &os) { os << moduleOS.str(); });
return info;
}