Fix #1940536, overactive preprocessor which was expanding defined(...) outside of #if and #elif preprocessor directives.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12441 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/common.mk

@@ -493,6 +493,7 @@ C_TEST_CASES += \
 	overload_extendc \
 	preproc \
 	preproc_constants_c \
+	preproc_defined \
 	preproc_line_file \
 	ret_by_value \
 	simple_array \

Examples/test-suite/preproc_defined.i

@@ -0,0 +1,36 @@
+%module preproc_defined
+
+// Check 'defined' passes through the preprocessor without being processed like '#if defined(ABC)' would be (SF bug #1940536)
+
+%define DEFINED_MACRO
+%{
+  int defined(int b) { 
+    return b > 10;
+  }
+  int vvv = -1;
+  void fn(int val) {
+    if (defined(val))
+      vvv = 1;
+    else
+      vvv = 0; 
+  }
+%}
+%enddef
+
+DEFINED_MACRO
+
+%{
+int checking(void) {
+  fn(11);
+  int okay = (vvv == 1);
+  fn(9);
+  okay = okay && (vvv == 0);
+  return okay; /* should be 1 */
+}
+%}
+
+%inline %{
+int call_checking(void) {
+  return checking();
+}
+%}

Examples/test-suite/python/preproc_defined_runme.py

@@ -0,0 +1,4 @@
+import preproc_defined
+
+if preproc_defined.call_checking() != 1:
+  raise RuntimeError