Conditional compilation based on Haxe compiler version? -

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what exact syntax conditional compilation in haxe checking against version number?

according haxe --help-defines haxedef haxe compiler version "haxe-ver" assume becomes "haxe_ver" in code.

so want check if version number @ least 3.2.0. tried:

#if (haxe_ver >= 3.2.0)

but didn't seem work. tried:

#if !haxe_ver < 3.2.0

and seemed compile, want sure.

well, it's not answer, see lots of different styles grepping through haxe libs:

haxe-3.2.0/std/cpp/zip/uncompress.hx:2: #if (haxe_ver < 3.4) haxe-3.1.3/std/neko/zip/uncompress.hx:2: #if (haxe_ver < 3.2) haxe-3.1.3/lib/openfl/3,0,0-beta,3/openfl/vector.hx:767: #if (haxe_ver > 3.101) haxe-3.1.3/lib/openfl/3,0,0-beta,3/docs/importall.hx:926: #if (haxe_ver >= "3.2") haxe-3.1.3/lib/actuate/1,8,3/motion/actuators/genericactuator.hx:61:  #if (haxe_209 || haxe3)

and quick test:

class ver {    macro public static function get_ver():haxe.macro.expr {     var rtn = haxe.macro.context.definedvalue("haxe_ver");     return {expr: econst(cstring(rtn)) , pos : haxe.macro.context.currentpos()};   }    static function main() {     trace("haxe_ver: "+get_ver()); #if (haxe_ver > "3.1.3")     trace("haxe_ver > \"3.1.3\" - true"); #else     trace("haxe_ver > \"3.1.3\" - false"); #end  #if (haxe_ver > 3.130)     trace("haxe_ver > 3.130 - true"); #else     trace("haxe_ver > 3.130 - false"); #end  #if (haxe_ver >= 3.20)     trace("haxe_ver >= 3.20 - true"); #else     trace("haxe_ver >= 3.20 - false"); #end  #if (!haxe_ver < 3.10)     trace("!haxe_ver < 3.10 - true"); #else     trace("!haxe_ver < 3.10 - false"); #end  #if (!(haxe_ver < 3.10))     trace("!(haxe_ver < 3.10) - true"); #else     trace("!(haxe_ver < 3.10) - false"); #end    } }

compiled using haxe 3.2:

ver.hx:9: haxe_ver: 3.2 ver.hx:10: haxe_ver > "3.1.3" - true ver.hx:16: haxe_ver > 3.130 - true ver.hx:22: haxe_ver >= 3.20 - true ver.hx:30: !haxe_ver < 3.10 - false ver.hx:34: !(haxe_ver < 3.10) - true

compiled using haxe 3.1.3:

ver.hx:9: haxe_ver: 3.103 ver.hx:10: haxe_ver > "3.1.3" - true ver.hx:18: haxe_ver > 3.130 - false ver.hx:24: haxe_ver >= 3.20 - false ver.hx:30: !haxe_ver < 3.10 - false ver.hx:34: !(haxe_ver < 3.10) - true

so appears: haxe_ver string 1 ., , it's string comparison that's happening. can enclose version in quotes, there 3 gotchas:

  • if use more 1 . you'll throw off comparison. don't use "3.1.3"
  • if use logical not ! should use parentheses
  • 3.1.3 (at least in environment) reports haxe_ver = 3.103

these safe:

#if (haxe_ver > 3.130) #if (haxe_ver <= 3.130) #if (haxe_ver < "3.200") #if (!(haxe_ver < 3.1))

also if it's helpful, here's macro print defines:

import haxe.macro.expr; import haxe.macro.context;  // note: context.getdefines() requires haxe 3.2 or later class main {    // - - - - - - - - - - - - - - - - - - - - - - - - - -   macro public static function get_defines():expr {     var rtn = "defines ("+       (context.defined("macro")?"macro":"standard")+" pass):\n";     var defines:map<string,string> = context.getdefines();     (key in defines.keys()) {       rtn += "-d "+key+"="+defines.get(key)+"\n";     }     trace(rtn); // compile-time trace     return {expr: econst(cstring(rtn)) , pos : context.currentpos()};   };   private static var __invoke_defines = get_defines();   // - - - - - - - - - - - - - - - - - - - - - - - - - -    static function main() {   } }

which outputs:

>haxe main.hx -main main -d foo=3 main.hx:15: defines (macro pass): -d haxe_ver=3.2 -d macro=1 -d sys=1 -d foo=3 -d dce=std -d hxcpp_api_level=321 -d true=1 -d cross=1 -d neko=1 -d haxe3=1  main.hx:15: defines (standard pass): -d haxe_ver=3.2 -d sys=1 -d foo=3 -d dce=std -d hxcpp_api_level=321 -d true=1 -d cross=1 -d haxe3=1

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