third_party/waf/waflib/Tools/bison.py

   1 #! /usr/bin/env python
   2 # encoding: utf-8
   3 # WARNING! Do not edit! https://waf.io/book/index.html#_obtaining_the_waf_file
   4
   5 #!/usr/bin/env python
   6 # encoding: utf-8
   7 # John O'Meara, 2006
   8 # Thomas Nagy 2009-2016 (ita)
   9
  10 """
  11 The **bison** program is a code generator which creates C or C++ files.
  12 The generated files are compiled into object files.
  13 """
  14
  15 from waflib import Task
  16 from waflib.TaskGen import extension
  17
  18 class bison(Task.Task):
  19         """Compiles bison files"""
  20         color   = 'BLUE'
  21         run_str = '${BISON} ${BISONFLAGS} ${SRC[0].abspath()} -o ${TGT[0].name}'
  22         ext_out = ['.h'] # just to make sure
  23
  24 @extension('.y', '.yc', '.yy')
  25 def big_bison(self, node):
  26         """
  27         Creates a bison task, which must be executed from the directory of the output file.
  28         """
  29         has_h = '-d' in self.env.BISONFLAGS
  30
  31         outs = []
  32         if node.name.endswith('.yc'):
  33                 outs.append(node.change_ext('.tab.cc'))
  34                 if has_h:
  35                         outs.append(node.change_ext('.tab.hh'))
  36         else:
  37                 outs.append(node.change_ext('.tab.c'))
  38                 if has_h:
  39                         outs.append(node.change_ext('.tab.h'))
  40
  41         tsk = self.create_task('bison', node, outs)
  42         tsk.cwd = node.parent.get_bld()
  43
  44         # and the c/cxx file must be compiled too
  45         self.source.append(outs[0])
  46
  47 def configure(conf):
  48         """
  49         Detects the *bison* program
  50         """
  51         conf.find_program('bison', var='BISON')
  52         conf.env.BISONFLAGS = ['-d']