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73 lines
2.3 KiB
Plaintext
73 lines
2.3 KiB
Plaintext
# Copyright (C) Vladimir Prus 2002. Permission to copy, use, modify, sell and
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# distribute this software is granted provided this copyright notice appears in
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# all copies. This software is provided "as is" without express or implied
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# warranty, and with no claim as to its suitability for any purpose.
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# Deals with target type declaration and defines target class which supports
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# typed targets.
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import feature ;
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import generators : * ;
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import class : class new ;
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feature.feature target-type : : composite optional ;
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feature.feature base-target-type : : composite optional ;
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feature.feature main-target-type : : optional incidental ;
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# Registers a target type, possible derived from a 'base-type'.
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# If 'suffixes' are provided, they given all the suffixes that mean a file is of 'type'.
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# Also, the first element gives the suffix to be used when constructing and object of
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# 'type'.
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# If 'main' is given, a rule with the same name as the target type
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# and signature
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# rule target-type ( name : sources * : requirements * : default-build )
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# will be added to the global scope.
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rule register ( type : suffixes * : base-type ? : main ? )
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{
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if $(type) in $(.types)
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{
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error "Type $(type) is already registered." ;
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}
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else
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{
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.types += $(type) ;
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.suffix.$(type) = $(suffixes[1]) ;
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.type.$(suffixes) = $(type) ;
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feature.extend target-type : $(type) ;
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feature.compose <target-type>$(type) : $(base-type:G=<base-target-type>) ;
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feature.compose <base-target-type>$(type) : $(base-type:G=<base-target-type>) ;
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if $(main)
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{
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IMPORT $(__name__) : main-target-rule : : $(type:L) ;
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}
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}
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}
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# Returns suffix that should be used when generating target of 'type'.
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rule generated-target-suffix ( type )
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{
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return $(.suffix.$(type)) ;
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}
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# Returns file type given its suffix.
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rule type ( suffix )
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{
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return $(.type$(suffix)) ;
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}
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rule main-target-rule ( name : sources * : requirements * : default-build ? )
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{
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# First find requuired target type, which is equal to the name used to
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# invoke us.
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local bt = [ BACKTRACE 1 ] ;
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local type = $(bt[4]) ;
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targets.main-target-alternative $(name) [ CALLER_MODULE ] typed-target : 3 : 4
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: $(type:U) : $(sources) : $(requirements) : $(default-build)
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;
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}
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