Driver: Implement 'missing argument' error.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67490 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Driver.cpp b/lib/Driver/Driver.cpp
index 40c6e50..db08426 100644
--- a/lib/Driver/Driver.cpp
+++ b/lib/Driver/Driver.cpp
@@ -72,18 +72,23 @@
}
unsigned Prev = Index;
- Arg *A = getOpts().ParseOneArg(*Args, Index, End);
- if (A) {
- if (A->getOption().isUnsupported()) {
- Diag(clang::diag::err_drv_unsupported_opt) << A->getAsString(*Args);
- continue;
- }
+ Arg *A = getOpts().ParseOneArg(*Args, Index);
+ assert(Index > Prev && "Parser failed to consume argument.");
- Args->append(A);
+ // Check for missing argument error.
+ if (!A) {
+ assert(Index >= End && "Unexpected parser error.");
+ Diag(clang::diag::err_drv_missing_argument)
+ << Args->getArgString(Prev)
+ << (Index - Prev - 1);
+ break;
}
- assert(Index > Prev && "Parser failed to consume argument.");
- (void) Prev;
+ if (A->getOption().isUnsupported()) {
+ Diag(clang::diag::err_drv_unsupported_opt) << A->getAsString(*Args);
+ continue;
+ }
+ Args->append(A);
}
return Args;