Fix parsing of float constants with an exponent (e.g. 1e-02f) (bug #1699646).

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@9688 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/primitive_types.i

@@ -598,6 +598,12 @@ macro(size_t,             pfx, sizet)
       return x + y;
     } 
 
+    // Regression test for bug1699646 - we weren't handling
+    // + or - after e for float constants.
+    float regression_test_for_bug1699646(float f = 1e-02f) {
+      return f;
+    } 
+
     float val_float(float x) {
       return x;
     }