genbindings: add explicit int casts when calling, to select overload

cmd/genbindings/emitcabi.go

@@ -106,6 +106,15 @@ func emitParametersCABI2CppForwarding(params []CppParameter) (preamble string, f
 			preamble += "\t}\n"
 			tmp = append(tmp, p.ParameterName+"_QList")
 
+		} else if p.IntType() {
+			// Use the raw ParameterType to select an explicit integer overload
+			// Don't use RenderTypeCpp() since it canonicalizes some int types for CABI
+			castType := p.ParameterType
+			if p.Pointer {
+				castType += "*"
+			}
+			tmp = append(tmp, "static_cast<"+castType+">("+p.ParameterName+")")
+
 		} else if p.ByRef {
 			// We changed RenderTypeCpp() to render this as a pointer
 			// Need to dereference so we can pass as reference to the actual Qt C++ function

cmd/genbindings/intermediate.go

@@ -25,6 +25,20 @@ func (p CppParameter) QListOf() (CppParameter, bool) {
 	return CppParameter{}, false
 }
 
+func (p CppParameter) IntType() bool {
+	switch p.ParameterType {
+	case "int", "uint",
+		"short", "ushort",
+		// "char", "uchar", // Don't count char or char* as integer types that need cast assertions
+		"long", "ulong",
+		"longlong", "ulonglong", "qlonglong", "qulonglong", "int64_t", "uint64_t",
+		"double", "float", "qreal":
+		return true
+	default:
+		return false
+	}
+}
+
 type CppProperty struct {
 	PropertyName string
 	PropertyType string