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ca18960a9e
* new/virtual-target.jam
(virtual-target.use-requirements): New rule.
(virtual-target.set-use-requirements): New rule.
* new/generators.jam (construct): Use 'use-requirements' of sources.
* new/targets.jam (basic-target.generate): Store use requirements for
generated targets.
(main-target-alternative): Process use requirements.
* new/project.jam: Support 'use-requirements' project attribute.
[SVN r15821]
118 lines
3.4 KiB
Plaintext
118 lines
3.4 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 += $(type) ;
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.bases.$(type) = $(base-type) ;
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.suffix.$(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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# Sets a scanner class that will be used for this 'type'.
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rule set-scanner ( type : scanner )
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{
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if ! $(type) in $(.types)
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{
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error "Type" $(type) "is not declared" ;
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}
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.scanner.$(type) = $(scanner) ;
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}
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# Returns a scanner instance appropriate to 'type' and 'properties'.
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rule get-scanner ( type : properties * )
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{
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if $(.scanner.$(type)) {
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return [ scanner.get $(.scanner.$(type)) : $(properties) ] ;
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}
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}
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# Returns true if 'type' has 'base' as its direct or
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# indirect base.
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rule is-derived ( type base )
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{
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if $(base) in $(.bases.$(type))
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{
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return true ;
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}
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else
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{
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# CONSIDER: maybe break when 'found' is true
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local found ;
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for local e in $(.bases.$(type))
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{
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if [ is-derived $(e) $(base) ]
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{
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found = true ;
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}
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}
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return $(found) ;
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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. The 'suffix' parameter should include
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# the dot.
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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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: use-requirements * )
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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 : 5 : 4
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: $(type:U) : $(sources) : $(requirements) : $(default-build) : $(use-requirements)
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;
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}
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