translate-c: don't export inline functions

Author: andrewrk

src-self-hosted/clang.zig

@@ -832,6 +832,8 @@ pub extern fn ZigClangFunctionDecl_hasBody(self: *const ZigClangFunctionDecl) bo
 pub extern fn ZigClangFunctionDecl_getStorageClass(self: *const ZigClangFunctionDecl) ZigClangStorageClass;
 pub extern fn ZigClangFunctionDecl_getParamDecl(self: *const ZigClangFunctionDecl, i: c_uint) *const struct_ZigClangParmVarDecl;
 pub extern fn ZigClangFunctionDecl_getBody(self: *const ZigClangFunctionDecl) *const struct_ZigClangStmt;
+pub extern fn ZigClangFunctionDecl_doesDeclarationForceExternallyVisibleDefinition(self: *const ZigClangFunctionDecl) bool;
+pub extern fn ZigClangFunctionDecl_isInlineSpecified(self: *const ZigClangFunctionDecl) bool;
 
 pub extern fn ZigClangBuiltinType_getKind(self: *const struct_ZigClangBuiltinType) ZigClangBuiltinTypeKind;
 

src-self-hosted/translate_c.zig

@@ -423,7 +423,7 @@ fn visitFnDecl(c: *Context, fn_decl: *const ZigClangFunctionDecl) Error!void {
         .has_body = has_body,
         .storage_class = storage_class,
         .is_export = switch (storage_class) {
-            .None => has_body,
+            .None => has_body and !ZigClangFunctionDecl_isInlineSpecified(fn_decl),
             .Extern, .Static => false,
             .PrivateExtern => return failDecl(c, fn_decl_loc, fn_name, "unsupported storage class: private extern", .{}),
             .Auto => unreachable, // Not legal on functions

src/zig_clang.cpp

@@ -1686,6 +1686,16 @@ const struct ZigClangStmt *ZigClangFunctionDecl_getBody(const struct ZigClangFun
     return reinterpret_cast<const ZigClangStmt *>(stmt);
 }
 
+bool ZigClangFunctionDecl_doesDeclarationForceExternallyVisibleDefinition(const struct ZigClangFunctionDecl *self) {
+    auto casted = reinterpret_cast<const clang::FunctionDecl *>(self);
+    return casted->doesDeclarationForceExternallyVisibleDefinition();
+}
+
+bool ZigClangFunctionDecl_isInlineSpecified(const struct ZigClangFunctionDecl *self) {
+    auto casted = reinterpret_cast<const clang::FunctionDecl *>(self);
+    return casted->isInlineSpecified();
+}
+
 const ZigClangTypedefNameDecl *ZigClangTypedefType_getDecl(const ZigClangTypedefType *self) {
     auto casted = reinterpret_cast<const clang::TypedefType *>(self);
     const clang::TypedefNameDecl *name_decl = casted->getDecl();

src/zig_clang.h

@@ -873,6 +873,8 @@ ZIG_EXTERN_C bool ZigClangFunctionDecl_hasBody(const struct ZigClangFunctionDecl
 ZIG_EXTERN_C enum ZigClangStorageClass ZigClangFunctionDecl_getStorageClass(const struct ZigClangFunctionDecl *);
 ZIG_EXTERN_C const struct ZigClangParmVarDecl *ZigClangFunctionDecl_getParamDecl(const struct ZigClangFunctionDecl *, unsigned i);
 ZIG_EXTERN_C const struct ZigClangStmt *ZigClangFunctionDecl_getBody(const struct ZigClangFunctionDecl *);
+ZIG_EXTERN_C bool ZigClangFunctionDecl_doesDeclarationForceExternallyVisibleDefinition(const struct ZigClangFunctionDecl *);
+ZIG_EXTERN_C bool ZigClangFunctionDecl_isInlineSpecified(const struct ZigClangFunctionDecl *);
 
 ZIG_EXTERN_C bool ZigClangRecordDecl_isUnion(const struct ZigClangRecordDecl *record_decl);
 ZIG_EXTERN_C bool ZigClangRecordDecl_isStruct(const struct ZigClangRecordDecl *record_decl);

test/translate_c.zig

@@ -2302,4 +2302,14 @@ pub fn addCases(cases: *tests.TranslateCContext) void {
     ,
         \\pub const bar = 4;
     });
+
+    cases.add("don't export inline functions",
+        \\inline void a(void) {}
+        \\static void b(void) {}
+        \\void c(void) {}
+    , &[_][]const u8{
+        \\pub fn a() void {}
+        \\pub fn b() void {}
+        \\pub export fn c() void {}
+    });
 }