Move Swig_locator from scanner.c to cscanner.c. Fix file and line error/warning reporting fixes where SWIG macros are used within {} braces (where the preprocessor expands macros), for example macros within %inline {...} and %fragment(...) {...} and nested structs. Basically anything that results ina call to skip_balanced() in the parser/preprocessor.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12227 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/errors/cpp_macro_locator.i

@@ -0,0 +1,103 @@
+%module xxx
+
+// Test the SWIG preprocessor locator effects on reporting line numbers in warnings when processing SWIG (multiline) macros
+
+// The ignored overloaded methods warnings should have the correct line number reporting
+// {} blocks are tested, where the preprocessor expands the macros
+
+%define CLASSMACRO(KLASS)
+class KLASS
+{
+public:
+  KLASS() {}
+  void methodX(int *) {}
+  void methodX(const int *) {}
+};
+%enddef
+
+%{
+#define CLASSMACRO(KLASS) \
+class KLASS \
+{ \
+public: \
+  KLASS() {} \
+  void methodX(int *) {} \
+  void methodX(const int *) {} \
+};
+%}
+
+%{
+#define VARIABLEMACRO(NAME) double NAME;
+struct Outer {
+  struct Inner {
+    VARIABLEMACRO(MyInnerVar)
+  };
+};
+void overload1(int *) {}
+void overload1(const int *) {}
+void overload2(int *) {}
+void overload2(const int *) {}
+void overload3(int *) {}
+void overload3(const int *) {}
+%}
+
+%define VARIABLEMACRO(NAME)
+double NAME;
+%enddef
+struct Outer {
+  struct Inner {
+    VARIABLEMACRO(MyInnerVar)
+  };
+};
+void overload1(int *) {}
+void overload1(const int *) {}
+
+%fragment("FragmentMethod", "header") {
+void fragmentMethod() {
+}
+VARIABLEMACRO(fragVar)
+}
+void overload2(int *) {}
+void overload2(const int *) {}
+
+%inline {
+CLASSMACRO(Klass1)
+}
+#warning inline warning message one
+void overload3(int *) {}
+void overload3(const int *) {}
+
+%{
+struct Classic {
+  Classic() {
+    VARIABLEMACRO(inconstructor)
+  }
+  double value;
+};
+void overload4(int *) {}
+void overload4(const int *) {}
+void overload5(int *) {}
+void overload5(const int *) {}
+%}
+
+struct Classic {
+  Classic() {
+    VARIABLEMACRO(inconstructor)
+  }
+  double value;
+};
+void overload4(int *) {}
+void overload4(const int *) {}
+
+%inline {
+void overloadinline1(int *) {}
+void overloadinline1(const int *) {}
+CLASSMACRO(Klass2)
+#warning an inline warning message 2
+void overloadinline2(int *) {}
+void overloadinline2(const int *) {}
+}
+void overload5(int *) {}
+void overload5(const int *) {}
+
+