Precedence of GNU C++ extensions >? and <? (min/max operators)

[Jeremy Hall]

Hi,

Does anyone know the exact priority of these operators? Its not
mentioned in the
description of the extension as far as I can see.

Thanks
Jeremy

[Axel Freyn]

Hi Jeremy,

Post by Jeremy Hall
Does anyone know the exact priority of these operators? Its not
mentioned in the description of the extension as far as I can see.

As I read the documentation in the gcc-sourcecode, they are the same
precedence as "<", ">", "<=", ">=". They are relation operators and
form a "relational-expression": (§5.9 in C++ standard, [expr.rel])

See line 6258-6296 in
http://gcc.gnu.org/viewcvs/branches/gcc-4_5-branch/gcc/cp/parser.c?view=markup&revision=170622
relational-expression:
shift-expression
relational-expression < shift-expression
relational-expression > shift-expression
relational-expression <= shift-expression
relational-expression >= shift-expression

GNU Extension:

relational-expression:
relational-expression <? shift-expression
relational-expression >? shift-expression


HTH,

Axel

[Bob Plantz]

Post by Jeremy Hall
Hi,
Does anyone know the exact priority of these operators? Its not
mentioned in the
description of the extension as far as I can see.
Thanks
Jeremy

I always told my students that multiplication and division have
higher precedence than addition and subtraction. Use
parentheses everyplace else. Code readability was part of
their grade in my classes.

--Bob

[Jeremy Hall]

Thanks for looking this up Axel,
Exactly the info I needed.
(I am writing an arithmetic expression interpreter).

Regards
Jeremy