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authorPatrick Simianer <simianer@cl.uni-heidelberg.de>2012-05-13 03:35:30 +0200
committerPatrick Simianer <simianer@cl.uni-heidelberg.de>2012-05-13 03:35:30 +0200
commit670a8f984fc6d8342180c59ae9e96b0b76f34d3d (patch)
tree9f2ce7eec1a77e56b3bb1ad0ad40f212d7a996b0 /jam-files/boost-build/util/indirect.jam
parenteb3ee28dc0eb1d3e5ed01ba0df843be329ae450d (diff)
parent2f64af3e06a518b93f7ca2c30a9d0aeb2c947031 (diff)
Merge remote-tracking branch 'upstream/master'
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+# Copyright 2003 Dave Abrahams
+# Copyright 2003 Vladimir Prus
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
+
+import modules ;
+import numbers ;
+
+
+# The pattern that indirect rules must match: module%rule
+.pattern = ^([^%]*)%([^%]+)$ ;
+
+
+#
+# Type checking rules.
+#
+local rule indirect-rule ( x )
+{
+ if ! [ MATCH $(.pattern) : $(x) ]
+ {
+ return "expected a string of the form module%rule, but got \""$(x)"\" for argument" ;
+ }
+}
+
+
+# Make an indirect rule which calls the given rule. If context is supplied it is
+# expected to be the module in which to invoke the rule by the 'call' rule
+# below. Otherwise, the rule will be invoked in the module of this rule's
+# caller.
+#
+rule make ( rulename bound-args * : context ? )
+{
+ context ?= [ CALLER_MODULE ] ;
+ context ?= "" ;
+ return $(context)%$(rulename) $(bound-args) ;
+}
+
+
+# Make an indirect rule which calls the given rule. 'rulename' may be a
+# qualified rule; if so it is returned unchanged. Otherwise, if frames is not
+# supplied, the result will be invoked (by 'call', below) in the module of the
+# caller. Otherwise, frames > 1 specifies additional call frames to back up in
+# order to find the module context.
+#
+rule make-qualified ( rulename bound-args * : frames ? )
+{
+ if [ MATCH $(.pattern) : $(rulename) ]
+ {
+ return $(rulename) $(bound-args) ;
+ }
+ else
+ {
+ frames ?= 1 ;
+ # If the rule name includes a Jamfile module, grab it.
+ local module-context = [ MATCH ^(Jamfile<[^>]*>)\\..* : $(rulename) ] ;
+
+ if ! $(module-context)
+ {
+ # Take the first dot-separated element as module name. This disallows
+ # module names with dots, but allows rule names with dots.
+ module-context = [ MATCH ^([^.]*)\\..* : $(rulename) ] ;
+ }
+ module-context ?= [ CALLER_MODULE $(frames) ] ;
+ return [ make $(rulename) $(bound-args) : $(module-context) ] ;
+ }
+}
+
+
+# Returns the module name in which the given indirect rule will be invoked.
+#
+rule get-module ( [indirect-rule] x )
+{
+ local m = [ MATCH $(.pattern) : $(x) ] ;
+ if ! $(m[1])
+ {
+ m = ;
+ }
+ return $(m[1]) ;
+}
+
+
+# Returns the rulename that will be called when x is invoked.
+#
+rule get-rule ( [indirect-rule] x )
+{
+ local m = [ MATCH $(.pattern) : $(x) ] ;
+ return $(m[2]) ;
+}
+
+
+# Invoke the given indirect-rule.
+#
+rule call ( [indirect-rule] r args * : * )
+{
+ return [ modules.call-in [ get-module $(r) ] : [ get-rule $(r) ] $(args)
+ : $(2) : $(3) : $(4) : $(5) : $(6) : $(7) : $(8) : $(9) ] ;
+}
+
+
+rule __test__
+{
+ import assert ;
+
+ rule foo-barr! ( x )
+ {
+ assert.equal $(x) : x ;
+ }
+
+ assert.equal [ get-rule [ make foo-barr! ] ] : foo-barr! ;
+ assert.equal [ get-module [ make foo-barr! ] ] : [ CALLER_MODULE ] ;
+
+ call [ make foo-barr! ] x ;
+ call [ make foo-barr! x ] ;
+ call [ make foo-barr! : [ CALLER_MODULE ] ] x ;
+}