|XP is just a number|
Re^2: Surprised by Perl parse of ternary operatorby eyepopslikeamosquito (Chancellor)
|on Dec 16, 2011 at 12:52 UTC||Need Help??|
Curiously, both Ruby and PHP, both with the same relative precedence as Perl for the ternary and assignment operators, bend the rules differently. For example, this Ruby program:
and PHP program:
both run without error, but, unlike Perl (which produces config=k2), both Ruby and PHP produce config=k1.
Arguably, all three languages should produce a syntax error.
Update: gcc produces a syntax error "f.c:6: error: lvalue required as left operand of assignment" with this test program (further update: g++ compiles it happily though and with the same semantics as the Ruby and PHP test programs):
Adding parentheses to line 6:
makes it work the same as the Ruby and PHP test programs.