The "desired result type" code in the expression
parser has hitherto been an implementation waiting
for a use. I have now tied the '-o' option for
the expression command -- which indicates that the
result is an Objective-C object and needs to be
printed -- to the ExpressionParser, which
communicates the desired type to Clang.
Now, if the result of an expression is determined
by an Objective-C method call for which there is
no type information, that result is implicitly
cast to id if and only if the -o option is passed
to the expression command. (Otherwise if there
is no explicit cast Clang will issue an error.
This behavior is identical to what happened before
r146756.)
Also added a testcase for -o enabled and disabled.
llvm-svn: 147099
diff --git a/lldb/source/Expression/ClangExpressionParser.cpp b/lldb/source/Expression/ClangExpressionParser.cpp
index 351c484..9128223 100644
--- a/lldb/source/Expression/ClangExpressionParser.cpp
+++ b/lldb/source/Expression/ClangExpressionParser.cpp
@@ -245,7 +245,10 @@
m_compiler->getLangOpts().ThreadsafeStatics = false;
m_compiler->getLangOpts().AccessControl = false; // Debuggers get universal access
m_compiler->getLangOpts().DollarIdents = true; // $ indicates a persistent variable name
+
m_compiler->getLangOpts().DebuggerSupport = true; // Features specifically for debugger clients
+ if (expr.DesiredResultType() == ClangExpression::eResultTypeId)
+ m_compiler->getLangOpts().DebuggerCastResultToId = true;
// Set CodeGen options
m_compiler->getCodeGenOpts().EmitDeclMetadata = true;