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authorKenneth Heafield <github@kheafield.com>2012-05-12 14:01:52 -0400
committerKenneth Heafield <github@kheafield.com>2012-05-12 14:01:52 -0400
commit3faecf9a00512dcbc8712c4bca9adae72fb64410 (patch)
tree9761b50d12f81a675fb7cbc663ceebad15079f78 /jam-files/boost-build/tools/cast.jam
parentc806a8fff63043f63773874986301f2822a2b552 (diff)
Give in and copy bjam into cdec source code
Diffstat (limited to 'jam-files/boost-build/tools/cast.jam')
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+# Copyright 2005 Vladimir Prus.
+# Distributed under the Boost Software License, Version 1.0. (See
+# accompanying file LICENSE_1_0.txt or copy at
+# http://www.boost.org/LICENSE_1_0.txt)
+
+# Defines main target 'cast', used to change type for target. For example, in Qt
+# library one wants two kinds of CPP files -- those that just compiled and those
+# that are passed via the MOC tool.
+#
+# This is done with:
+#
+# exe main : main.cpp [ cast _ moccable-cpp : widget.cpp ] ;
+#
+# Boost.Build will assing target type CPP to both main.cpp and widget.cpp. Then,
+# the cast rule will change target type of widget.cpp to MOCCABLE-CPP, and Qt
+# support will run the MOC tool as part of the build process.
+#
+# At the moment, the 'cast' rule only works for non-derived (source) targets.
+#
+# TODO: The following comment is unclear or incorrect. Clean it up.
+# > Another solution would be to add a separate main target 'moc-them' that
+# > would moc all the passed sources, no matter what their type is, but I prefer
+# > cast, as defining a new target type + generator for that type is somewhat
+# > simpler than defining a main target rule.
+
+import "class" : new ;
+import errors ;
+import project ;
+import property-set ;
+import targets ;
+import type ;
+
+
+class cast-target-class : typed-target
+{
+ import type ;
+
+ rule __init__ ( name : project : type : sources * : requirements * :
+ default-build * : usage-requirements * )
+ {
+ typed-target.__init__ $(name) : $(project) : $(type) : $(sources) :
+ $(requirements) : $(default-build) : $(usage-requirements) ;
+ }
+
+ rule construct ( name : source-targets * : property-set )
+ {
+ local result ;
+ for local s in $(source-targets)
+ {
+ if ! [ class.is-a $(s) : file-target ]
+ {
+ import errors ;
+ errors.user-error Source to the 'cast' rule is not a file! ;
+ }
+ if [ $(s).action ]
+ {
+ import errors ;
+ errors.user-error Only non-derived target are allowed for
+ 'cast'. : when building [ full-name ] ;
+ }
+ local r = [ $(s).clone-with-different-type $(self.type) ] ;
+ result += [ virtual-target.register $(r) ] ;
+ }
+ return [ property-set.empty ] $(result) ;
+ }
+}
+
+
+rule cast ( name type : sources * : requirements * : default-build * :
+ usage-requirements * )
+{
+ local project = [ project.current ] ;
+
+ local real-type = [ type.type-from-rule-name $(type) ] ;
+ if ! $(real-type)
+ {
+ errors.user-error No type corresponds to the main target rule name
+ '$(type)' : "Hint: try a lowercase name" ;
+ }
+
+ targets.main-target-alternative [ new cast-target-class $(name) : $(project)
+ : $(real-type)
+ : [ targets.main-target-sources $(sources) : $(name) ]
+ : [ targets.main-target-requirements $(requirements) : $(project) ]
+ : [ targets.main-target-default-build $(default-build) : $(project) ]
+ : [ targets.main-target-usage-requirements $(usage-requirements) :
+ $(project) ] ] ;
+}
+
+
+IMPORT $(__name__) : cast : : cast ;