| tokenAssociativity |
(int token) |
yoix.parser |
| |
Returns an
int
that is
-1
when
token
represents a left associative Yoix operator,
1
when it represents a right associatve operator,
and
0
when
token
does not represent an operator.
The constants associated with Yoix operators are defined in the
yoix.parser.YoixConstants
dictionary.
This built-in probably will only be used by specialized Yoix applications,
like a program checker, that examine parse trees associated
with other Yoix programs.
| |
| Example: |
The program,
import yoix.parser.*;
import yoix.parser.YoixConstants.*;
import yoix.stdio.*;
Array tokens = {PLUSEQ, LOGICALAND, LEFTSHIFT, WHILE};
for (; tokens@sizeof > 0; tokens++) {
switch (tokenAssociativity(*tokens)) {
case -1:
printf("%s is left associative\n", tokenImage(*tokens));
break;
case 0:
printf("%s is not an operator\n", tokenImage(*tokens));
break;
case 1:
printf("%s is right associative\n", tokenImage(*tokens));
break;
}
}
prints
+= is right associative
&& is left associative
<< is left associative
while is not an operator
on standard output.
| | |
| Return: |
int
| | |
| See Also: |
ParseTree,
tokenImage,
tokenPrecedence,
tokenValue
|
|
Yoix is a registered trademark of AT&T Inc.
|
