lldb/test/Shell/Expr/TestObjCxxEnumConflict.test

# REQUIRES: system-darwin

# Tests whether the expression evaluator can handle the `NS_ENUM`/`NS_OPTIONS`
# typedefs from Objective-C `CoreFoundation`.
# Here `module.h` mimicks the `NS_OPTIONS` typedef from `CoreFoundation`.
# 
# The `ClangModulesDeclVendor` currently compiles modules as
# C++, so the `MyInt` Clang decl in the module will be a `TypedefType`,
# while the DWARF AST parser will produce an `EnumType` (since that's what
# the debug-info says). When the `ASTImporter` imports these decls into the
# scratch AST, it will fail to re-use one or the other decl because they
# aren't structurally equivalent (one is a typedef, the other an enum),
# so we end up with two conflicting `MyInt` declarations in the scratch AST
# and the expression fails to run due to ambiguity in name lookup.

# RUN: split-file %s %t
# RUN: %clang_host -g %t/main.m -fmodules -fcxx-modules -o %t.out
# RUN: %lldb -x -b -s %t/commands.input %t.out -o exit 2>&1 \
# RUN:       | FileCheck %s

#--- main.m

#import "module.h"

int main() {
    MyInt i;
    return i;
}

#--- module.h

#if (__cplusplus)
typedef int MyInt;
enum : MyInt { CASE };
#else
typedef enum MyInt : int MyInt;
enum MyInt : int { CASE };
#endif

#--- module.modulemap
module Int {
    header "module.h"
}

#--- commands.input

break set -n main
run
expression -l objective-c -- (MyInt)5

# CHECK: error: reference to 'MyInt' is ambiguous 
# CHECK: error: reference to 'MyInt' is ambiguous 
# CHECK: note: note: candidate found by name lookup is 'MyInt' 
# CHECK: note: note: candidate found by name lookup is 'MyInt'