recognize the and/not/or keywords and operator names

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@7745 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/test-suite/operator_overload.i

@@ -32,8 +32,8 @@ see bottom for a set of possible tests
 %rename(LessThanEqual) operator <=;
 %rename(GreaterThan) operator >;
 %rename(GreaterThanEqual) operator >=;
-%rename(And) operator &&;
+%rename(And) operator and;
-%rename(Or) operator ||;
+%rename(Or) operator or;
 #endif
 
 %inline %{
@@ -45,6 +45,10 @@ public:
   {}
   Op(const Op& o):i(o.i)
   {}
+
+  friend Op operator and(const Op& a,const Op& b){return Op(a.i&&b.i);}
+  friend Op operator or(const Op& a,const Op& b){return Op(a.i||b.i);}
+
   Op &operator=(const Op& o) {
     i=o.i;
     return *this;
@@ -63,12 +67,10 @@ public:
   friend Op operator/(const Op& a,const Op& b){return Op(a.i/b.i);}
   friend Op operator%(const Op& a,const Op& b){return Op(a.i%b.i);}
 
-  friend Op operator&&(const Op& a,const Op& b){return Op(a.i&&b.i);}
-  friend Op operator||(const Op& a,const Op& b){return Op(a.i||b.i);}
 
   // unary operators
   Op operator-() const {return Op(-i);}
-  bool operator!() const {return !(i);}
+  bool operator !() const {return !(i);}
 
   // overloading the [] operator
   // need 2 versions: get & set

SWIG/Source/CParse/cscanner.c

@@ -1021,6 +1021,31 @@ void scanner_next_token(int tok) {
  * Gets the lexene and returns tokens.
  *************************************************************/
 
+static int search_name(char c, const char* ostr)
+{
+  int count = 0;
+  int find = 0;
+
+  while (ostr[count]) {
+    if (c == ostr[count]) {
+      c = nextchar();
+      ++count;
+    } else {
+      break;
+    }
+  }
+  if (!ostr[count]) {
+    if (isalnum(c) || c == '_') {
+      find = 0;
+    } else {
+      find = c;
+    }
+  }
+  if (count) retract(count);  
+  return find;
+}
+
+
 int yylex(void) {
 
     int   l;
@@ -1131,6 +1156,9 @@ int yylex(void) {
 	  /* C++ keywords */
 	  
 	  if (cparse_cplusplus) {
+	    if (strcmp(yytext,"and") == 0) return(LAND);
+	    if (strcmp(yytext,"or") == 0) return(LOR);
+	    if (strcmp(yytext,"not") == 0) return(LNOT);
 	    if (strcmp(yytext,"class") == 0) return(CLASS);
 	    if (strcmp(yytext,"private") == 0) return(PRIVATE);
 	    if (strcmp(yytext,"public") == 0) return(PUBLIC);
@@ -1151,7 +1179,17 @@ int yylex(void) {
 		}
 		count++;
 		if (!isspace(c)) {
-		  if ((!state) && (isalpha(c))) isconversion = 1;
+		  if ((!state) && (isalpha(c))) {
+		    /* we look for the and/not/or operators */
+		    if (search_name(c, "and") ||
+			search_name(c, "not") ||
+			search_name(c, "or")) {
+		      isconversion = 0;
+		    } else {
+		      isconversion = 1;
+		    }
+		  }
+		  
 		  if (!state && !sticky) Putc(' ',s);
 		  Putc(c,s);
 		  sticky = 0;