added the method OverloadData::findNextArgWithDefault() which returns

the nearest occurrence of an argument with a default value. this
could be used when the overload has only one signature and some
of the arguments ahead could have default values leading to more
than one way of calling the method.

2 files changed, 21 insertions, 0 deletions

diff --git a/overloaddata.cpp b/overloaddata.cpp
index 48e7e27ce..c9e5b5b44 100644
--- a/overloaddata.cpp
+++ b/overloaddata.cpp
@@ -188,6 +188,25 @@ bool OverloadData::nextArgumentHasDefaultValue() const
     return false;
 }
 
+static OverloadData* _findNextArgWithDefault(OverloadData* overloadData)
+{
+    if (overloadData->hasDefaultValue())
+        return overloadData;
+
+    OverloadData* result = 0;
+    foreach (OverloadData* odata, overloadData->nextOverloadData()) {
+        OverloadData* tmp = _findNextArgWithDefault(odata);
+        if (!result || (tmp && result->argPos() > tmp->argPos()))
+            result = tmp;
+    }
+    return result;
+}
+
+OverloadData* OverloadData::findNextArgWithDefault()
+{
+    return _findNextArgWithDefault(this);
+}
+
 bool OverloadData::isFinalOccurrence(const AbstractMetaFunction* func) const
 {
     foreach (const OverloadData* pd, m_nextOverloadData) {
diff --git a/overloaddata.h b/overloaddata.h
index 5fd6ff547..f80ce84df 100644
--- a/overloaddata.h
+++ b/overloaddata.h
@@ -50,6 +50,8 @@ public:
     bool isHeadOverloadData() const { return this == m_headOverloadData; }
     bool hasDefaultValue() const;
     bool nextArgumentHasDefaultValue() const;
+    /// Returns the nearest occurrence, including this instance, of an argument with a default value.
+    OverloadData* findNextArgWithDefault();
     bool isFinalOccurrence(const AbstractMetaFunction* func) const;
 
     QList<const AbstractMetaFunction*> overloads() const { return m_overloads; }