Re: [RFC] Constant Scalar Expressions (with constants)

Hi Bob, alright, my fault not getting the ternary operator example :) Thanks for the clarification! Lars On 07 Nov 2013, at 13:45, Bob Weinand <bobwei9@hotmail.com> wrote: > Hi Lars, > > In what way is this ambiguous? > > I just tested; FOO never equals self::FOO. FOO always is a global constant, while self::FOO > (and Klass::FOO) is the only way to refer to the class constant. > > const FOO = 2; > > class Klass > { > const FOO = 1; > const BAR = FOO; // value two, global constant, and if FOO is not defined, Klass::Bar === > "FOO". > } > > Bob > > Am 7.11.2013 um 13:31 schrieb Lars Strojny <lars@strojny.net>: > >> Hi Bob, >> >> thanks for your work, it’s awesome. One thing about constants: >> >> Take this example: >> >> const FOO = 2; >> >> class Klass >> { >> const FOO = 1; >> const BAR = FOO; >> } >> >> Here FOO is ambiguous, as it could resolve to 2 or to 1. If I understood it correctly, >> global constants are not yet implemented but I would suggest to always force prefixing the constant >> to get rid of the ambiguity and allow for future extension. >> >> const FOO = 2; >> >> class Klass >> { >> const FOO = 1; >> const BAR = self::FOO; >> } >> >> Does that make sense? >> >> cu, >> Lars >> >> On 07 Nov 2013, at 13:01, Bob Weinand <bobwei9@hotmail.com> wrote: >> >>> Hi! >>> >>> As you all know, Anthony Ferrara had withdrawn his RFC a few months ago, which was >>> without support for constants in these expressions: >>> >>> const foo = 10; >>> const bar = 10 * foo; >>> >>> The use of a constant in a declaration of a constant was not yet possible with his >>> patch. >>> >>> That's what I changed. >>> >>> Enjoy reading the RFC at: >>> >>> https://wiki.php.net/rfc/const_scalar_exprs >>> >>> Bob Weinand >>> >>> Special thanks go to Dmitry who had helped me a lot with feedback and a deep review of >>> the patch. >>> -- >>> PHP Internals - PHP Runtime Development Mailing List >>> To unsubscribe, visit: http://www.php.net/unsub.php

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