Re: RFC - MACRO

On Dec 22, 2010, at 4:38 PM, Mathias Grimm wrote: > People always will want more, but some features are nice. > for C/C++ programmers, macro is on of the best things to make thing work > every where. > > its possible to create a IDE macro, but the native php feature will be good. > template engines can de wrap this functionality too. > is just like a variable: I've long wished for preprocessing in PHP. It would be semi-trivial to plug in libcpp from GCC or llvm's preprocessing library, if licensing weren't an issue. If it is, then a reasonable homegrown implementation of C's preprocessor semantics, or at least a subset of them, isn't that difficult. Piping through cpp has two major problems: 1) It's an extra runtime step. Slower, more error-prone, not always an option (shared hosting anyone?). 2) cpp doesn't understand # comments, single-quoted strings, heredocs, etc. Many PHP scripts therefore produce annoying/confusing errors. Some issues with PHP-native preprocessing: - Are eval() strings subject to it? At what stage, outer script processing or the eval string? - #include/#import versus include()/require() - confusing - Does preprocessing take place outside whatever PHP tags are active? > On Wed, Dec 22, 2010 at 7:08 PM, Scott MacVicar <scott@macvicar.net> wrote: >> I really dislike this, what about resolving orders, then people will want >> undef, then ifdef with conditions. >> >> The language doesn't need to introduce anything that makes it more complex >> to use. >> >> - Scott >> >> On 22 Dec 2010, at 11:55, Mathias Grimm <mathiasgrimm@gmail.com> wrote: >>> I Just want a simple replace-on-the-air to avoid spend time writing more. >>> >>> >>> On Wed, Dec 22, 2010 at 5:43 PM, Stas Malyshev <smalyshev@sugarcrm.com >>> wrote: >>> >>>> Hi! >>>> >>>> >>>> I want to request a C/C++ feature that i think is good. >>>>> >>>>> MACRO >>>>> >>>> >>>> You know that you could write: >>>> <?php >>>> #define PF private function >>>> #define SCOPE_CLASS(x) class MyProject_ ## x >>>> >>>> >>>> class UseMacro >>>> { >>>> PF preSave($object) >>>> { >>>> //... >>>> } >>>> >>>> } >>>> >>>> SCOPE_CLASS(Internal) >>>> { >>>> >>>> } >>>> >>>> And then run it through CPP (gcc -Mcpp -E - - < in.php > out.php) and >> get >>>> all the macros processed? >>>> -- >>>> Stanislav Malyshev, Software Architect >>>> SugarCRM: http://www.sugarcrm.com/ >>>> (408)454-6900 ext. 227 >>>> >> -- Gwynne