[CommandLine] Aliases require an value if their target requires a value.

This can still be overridden by explicitly setting a value requirement on the
alias option, but by default it should be the same.

PR18649

llvm-svn: 200407

1 files changed, 10 insertions, 0 deletions

diff --git a/llvm/include/llvm/Support/CommandLine.h b/llvm/include/llvm/Support/CommandLine.h
index 774c214933b..515b0bd00f9 100644
--- a/llvm/include/llvm/Support/CommandLine.h
+++ b/llvm/include/llvm/Support/CommandLine.h
@@ -249,6 +249,12 @@ public:
   //
   void addArgument();
 
+  /// Unregisters this option from the CommandLine system.
+  ///
+  /// This option must have been the last option registered.
+  /// For testing purposes only.
+  void removeArgument();
+
   Option *getNextRegisteredOption() const { return NextRegistered; }
 
   // Return the width of the option tag for printing...
@@ -1646,6 +1652,10 @@ class alias : public Option {
   virtual void printOptionValue(size_t /*GlobalWidth*/,
                                 bool /*Force*/) const LLVM_OVERRIDE {}
 
+  virtual ValueExpected getValueExpectedFlagDefault() const LLVM_OVERRIDE {
+    return AliasFor->getValueExpectedFlag();
+  }
+
   void done() {
     if (!hasArgStr())
       error("cl::alias must have argument name specified!");