[libclang] Make clang_Cursor_getArgument work with call-exprs.

Patch by Matthias Kleine!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178475 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 18 insertions, 0 deletions

diff --git a/tools/libclang/CXCursor.cpp b/tools/libclang/CXCursor.cpp
index 73d11f943a..7b01ec2de0 100644
--- a/tools/libclang/CXCursor.cpp
+++ b/tools/libclang/CXCursor.cpp
@@ -939,6 +939,13 @@ int clang_Cursor_getNumArguments(CXCursor C) {
       return FD->param_size();
   }
 
+  if (clang_isExpression(C.kind)) {
+    const Expr *E = cxcursor::getCursorExpr(C);
+    if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
+      return CE->getNumArgs();
+    }
+  }
+
   return -1;
 }
 
@@ -956,6 +963,17 @@ CXCursor clang_Cursor_getArgument(CXCursor C, unsigned i) {
     }
   }
 
+  if (clang_isExpression(C.kind)) {
+    const Expr *E = cxcursor::getCursorExpr(C);
+    if (const CallExpr *CE = dyn_cast<CallExpr>(E)) {
+      if (i < CE->getNumArgs()) {
+        return cxcursor::MakeCXCursor(CE->getArg(i),
+                                      getCursorDecl(C),
+                                      cxcursor::getCursorTU(C));
+      }
+    }
+  }
+
   return clang_getNullCursor();
 }