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authorChris Dyer <cdyer@cab.ark.cs.cmu.edu>2012-10-02 00:19:43 -0400
committerChris Dyer <cdyer@cab.ark.cs.cmu.edu>2012-10-02 00:19:43 -0400
commite26434979adc33bd949566ba7bf02dff64e80a3e (patch)
treed1c72495e3af6301bd28e7e66c42de0c7a944d1f /jam-files/boost-build/build/feature.jam
parent0870d4a1f5e14cc7daf553b180d599f09f6614a2 (diff)
cdec cleanup, remove bayesian stuff, parsing stuff
Diffstat (limited to 'jam-files/boost-build/build/feature.jam')
-rw-r--r--jam-files/boost-build/build/feature.jam1335
1 files changed, 0 insertions, 1335 deletions
diff --git a/jam-files/boost-build/build/feature.jam b/jam-files/boost-build/build/feature.jam
deleted file mode 100644
index 6f54adef..00000000
--- a/jam-files/boost-build/build/feature.jam
+++ /dev/null
@@ -1,1335 +0,0 @@
-# Copyright 2001, 2002, 2003 Dave Abrahams
-# Copyright 2002, 2006 Rene Rivera
-# Copyright 2002, 2003, 2004, 2005, 2006 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 assert : * ;
-import "class" : * ;
-import errors : lol->list ;
-import indirect ;
-import modules ;
-import regex ;
-import sequence ;
-import set ;
-import utility ;
-
-
-local rule setup ( )
-{
- .all-attributes =
- implicit
- composite
- optional
- symmetric
- free
- incidental
- path
- dependency
- propagated
- link-incompatible
- subfeature
- order-sensitive
- ;
-
- .all-features = ;
- .all-subfeatures = ;
- .all-top-features = ; # non-subfeatures
- .all-implicit-values = ;
-}
-setup ;
-
-
-# Prepare a fresh space to test in by moving all global variable settings into
-# the given temporary module and erasing them here.
-#
-rule prepare-test ( temp-module )
-{
- DELETE_MODULE $(temp-module) ;
-
- # Transfer globals to temp-module.
- for local v in [ VARNAMES feature ]
- {
- if [ MATCH (\\.) : $(v) ]
- {
- modules.poke $(temp-module) : $(v) : $($(v)) ;
- $(v) = ;
- }
- }
- setup ;
-}
-
-
-# Clear out all global variables and recover all variables from the given
-# temporary module.
-#
-rule finish-test ( temp-module )
-{
- # Clear globals.
- for local v in [ VARNAMES feature ]
- {
- if [ MATCH (\\.) : $(v) ]
- {
- $(v) = ;
- }
- }
-
- for local v in [ VARNAMES $(temp-module) ]
- {
- $(v) = [ modules.peek $(temp-module) : $(v) ] ;
- }
- DELETE_MODULE $(temp-module) ;
-}
-
-
-# Transform features by bracketing any elements which are not already bracketed
-# by "<>".
-#
-local rule grist ( features * )
-{
- local empty = "" ;
- return $(empty:G=$(features)) ;
-}
-
-
-# Declare a new feature with the given name, values, and attributes.
-#
-rule feature (
- name # Feature name.
- : values * # Allowable values - may be extended later using feature.extend.
- : attributes * # Feature attributes (e.g. implicit, free, propagated...).
-)
-{
- name = [ grist $(name) ] ;
-
- local error ;
-
- # Check for any unknown attributes.
- if ! ( $(attributes) in $(.all-attributes) )
- {
- error = unknown attributes:
- [ set.difference $(attributes) : $(.all-attributes) ] ;
- }
- else if $(name) in $(.all-features)
- {
- error = feature already defined: ;
- }
- else if implicit in $(attributes) && free in $(attributes)
- {
- error = free features cannot also be implicit ;
- }
- else if free in $(attributes) && propagated in $(attributes)
- {
- error = free features cannot be propagated ;
- }
- else
- {
- local m = [ MATCH (.*=.*) : $(values) ] ;
- if $(m[1])
- {
- error = "feature value may not contain '='" ;
- }
- }
-
- if $(error)
- {
- errors.error $(error)
- : "in" feature declaration:
- : feature [ lol->list $(1) : $(2) : $(3) ] ;
- }
-
- $(name).values ?= ;
- $(name).attributes = $(attributes) ;
- $(name).subfeatures ?= ;
- $(attributes).features += $(name) ;
-
- .all-features += $(name) ;
- if subfeature in $(attributes)
- {
- .all-subfeatures += $(name) ;
- }
- else
- {
- .all-top-features += $(name) ;
- }
- extend $(name) : $(values) ;
-}
-
-
-# Sets the default value of the given feature, overriding any previous default.
-#
-rule set-default ( feature : value )
-{
- local f = [ grist $(feature) ] ;
- local a = $($(f).attributes) ;
- local bad-attribute = ;
- if free in $(a)
- {
- bad-attribute = free ;
- }
- else if optional in $(a)
- {
- bad-attribute = optional ;
- }
- if $(bad-attribute)
- {
- errors.error "$(bad-attribute) property $(f) cannot have a default." ;
- }
- if ! $(value) in $($(f).values)
- {
- errors.error "The specified default value, '$(value)' is invalid"
- : "allowed values are: " $($(f).values) ;
- }
- $(f).default = $(value) ;
-}
-
-
-# Returns the default property values for the given features.
-#
-rule defaults ( features * )
-{
- local result ;
- for local f in $(features)
- {
- local gf = $(:E=:G=$(f)) ;
- local a = $($(gf).attributes) ;
- if ( free in $(a) ) || ( optional in $(a) )
- {
- }
- else
- {
- result += $(gf)$($(gf).default) ;
- }
- }
- return $(result) ;
-}
-
-
-# Returns true iff all 'names' elements are valid features.
-#
-rule valid ( names + )
-{
- if $(names) in $(.all-features)
- {
- return true ;
- }
-}
-
-
-# Returns the attibutes of the given feature.
-#
-rule attributes ( feature )
-{
- return $($(:E=:G=$(feature)).attributes) ;
-}
-
-
-# Returns the values of the given feature.
-#
-rule values ( feature )
-{
- return $($(:E=:G=$(feature)).values) ;
-}
-
-
-# Returns true iff 'value-string' is a value-string of an implicit feature.
-#
-rule is-implicit-value ( value-string )
-{
- local v = [ regex.split $(value-string) - ] ;
- local failed ;
- if ! $(v[1]) in $(.all-implicit-values)
- {
- failed = true ;
- }
- else
- {
- local feature = $($(v[1]).implicit-feature) ;
- for local subvalue in $(v[2-])
- {
- if ! [ find-implied-subfeature $(feature) $(subvalue) : $(v[1]) ]
- {
- failed = true ;
- }
- }
- }
-
- if ! $(failed)
- {
- return true ;
- }
-}
-
-
-# Returns the implicit feature associated with the given implicit value.
-#
-rule implied-feature ( implicit-value )
-{
- local components = [ regex.split $(implicit-value) "-" ] ;
-
- local feature = $($(components[1]).implicit-feature) ;
- if ! $(feature)
- {
- errors.error \"$(implicit-value)\" is not a value of an implicit feature ;
- feature = "" ; # Keep testing happy; it expects a result.
- }
- return $(feature) ;
-}
-
-
-local rule find-implied-subfeature ( feature subvalue : value-string ? )
-{
- # Feature should be of the form <feature-name>.
- if $(feature) != $(feature:G)
- {
- errors.error invalid feature $(feature) ;
- }
-
- return $($(feature)$(value-string:E="")<>$(subvalue).subfeature) ;
-}
-
-
-# Given a feature and a value of one of its subfeatures, find the name of the
-# subfeature. If value-string is supplied, looks for implied subfeatures that
-# are specific to that value of feature
-#
-rule implied-subfeature (
- feature # The main feature name.
- subvalue # The value of one of its subfeatures.
- : value-string ? # The value of the main feature.
-)
-{
- local subfeature = [ find-implied-subfeature $(feature) $(subvalue)
- : $(value-string) ] ;
- if ! $(subfeature)
- {
- value-string ?= "" ;
- errors.error \"$(subvalue)\" is not a known subfeature value of
- $(feature)$(value-string) ;
- }
- return $(subfeature) ;
-}
-
-
-# Generate an error if the feature is unknown.
-#
-local rule validate-feature ( feature )
-{
- if ! $(feature) in $(.all-features)
- {
- errors.error unknown feature \"$(feature)\" ;
- }
-}
-
-
-# Given a feature and its value or just a value corresponding to an implicit
-# feature, returns a property set consisting of all component subfeatures and
-# their values. For example all the following calls:
-#
-# expand-subfeatures-aux <toolset>gcc-2.95.2-linux-x86
-# expand-subfeatures-aux gcc-2.95.2-linux-x86
-#
-# return:
-#
-# <toolset>gcc <toolset-version>2.95.2 <toolset-os>linux <toolset-cpu>x86
-#
-local rule expand-subfeatures-aux (
- feature ? # Feature name or empty if value corresponds to an
- # implicit property.
- : value # Feature value.
- : dont-validate ? # If set, no value string validation will be done.
-)
-{
- if $(feature)
- {
- feature = $(feature) ;
- }
-
- if ! $(feature)
- {
- feature = [ implied-feature $(value) ] ;
- }
- else
- {
- validate-feature $(feature) ;
- }
- if ! $(dont-validate)
- {
- validate-value-string $(feature) $(value) ;
- }
-
- local components = [ regex.split $(value) "-" ] ;
-
- # Get the top-level feature's value.
- local value = $(components[1]:G=) ;
-
- local result = $(components[1]:G=$(feature)) ;
-
- local subvalues = $(components[2-]) ;
- while $(subvalues)
- {
- local subvalue = $(subvalues[1]) ; # Pop the head off of subvalues.
- subvalues = $(subvalues[2-]) ;
-
- local subfeature = [ find-implied-subfeature $(feature) $(subvalue) :
- $(value) ] ;
-
- # If no subfeature was found reconstitute the value string and use that.
- if ! $(subfeature)
- {
- result = $(components:J=-) ;
- result = $(result:G=$(feature)) ;
- subvalues = ; # Stop looping.
- }
- else
- {
- local f = [ MATCH ^<(.*)>$ : $(feature) ] ;
- result += $(subvalue:G=$(f)-$(subfeature)) ;
- }
- }
-
- return $(result) ;
-}
-
-
-# Make all elements of properties corresponding to implicit features explicit,
-# and express all subfeature values as separate properties in their own right.
-# For example, all of the following properties
-#
-# gcc-2.95.2-linux-x86
-# <toolset>gcc-2.95.2-linux-x86
-#
-# might expand to
-#
-# <toolset>gcc <toolset-version>2.95.2 <toolset-os>linux <toolset-cpu>x86
-#
-rule expand-subfeatures (
- properties * # Property set with elements of the form
- # <feature>value-string or just value-string in the case
- # of implicit features.
- : dont-validate ?
-)
-{
- local result ;
- for local p in $(properties)
- {
- # Don't expand subfeatures in subfeatures
- if ! [ MATCH "(:)" : $(p:G) ]
- {
- result += [ expand-subfeatures-aux $(p:G) : $(p:G=) : $(dont-validate) ] ;
- }
- else
- {
- result += $(p) ;
- }
- }
- return $(result) ;
-}
-
-
-# Helper for extend, below. Handles the feature case.
-#
-local rule extend-feature ( feature : values * )
-{
- feature = [ grist $(feature) ] ;
- validate-feature $(feature) ;
- if implicit in $($(feature).attributes)
- {
- for local v in $(values)
- {
- if $($(v).implicit-feature)
- {
- errors.error $(v) is already associated with the \"$($(v).implicit-feature)\" feature ;
- }
- $(v).implicit-feature = $(feature) ;
- }
-
- .all-implicit-values += $(values) ;
- }
- if ! $($(feature).values)
- {
- # This is the first value specified for this feature so make it be the
- # default.
- $(feature).default = $(values[1]) ;
- }
- $(feature).values += $(values) ;
-}
-
-
-# Checks that value-string is a valid value-string for the given feature.
-#
-rule validate-value-string ( feature value-string )
-{
- if ! (
- free in $($(feature).attributes)
- || ( $(value-string) in $(feature).values )
- )
- {
- local values = $(value-string) ;
-
- if $($(feature).subfeatures)
- {
- if ! ( $(value-string) in $($(feature).values) )
- && ! ( $(value-string) in $($(feature).subfeatures) )
- {
- values = [ regex.split $(value-string) - ] ;
- }
- }
-
- if ! ( $(values[1]) in $($(feature).values) ) &&
-
- # An empty value is allowed for optional features.
- ( $(values[1]) || ! ( optional in $($(feature).attributes) ) )
- {
- errors.error \"$(values[1])\" is not a known value of feature $(feature)
- : legal values: \"$($(feature).values)\" ;
- }
-
- for local v in $(values[2-])
- {
- # This will validate any subfeature values in value-string.
- implied-subfeature $(feature) $(v) : $(values[1]) ;
- }
- }
-}
-
-
-# A helper that computes:
-# * name(s) of module-local variable(s) used to record the correspondence
-# between subvalue(s) and a subfeature
-# * value of that variable when such a subfeature/subvalue has been defined and
-# returns a list consisting of the latter followed by the former.
-#
-local rule subvalue-var (
- feature # Main feature name.
- value-string ? # If supplied, specifies a specific value of the main
- # feature for which the subfeature values are valid.
- : subfeature # Subfeature name.
- : subvalues * # Subfeature values.
-)
-{
- feature = [ grist $(feature) ] ;
- validate-feature $(feature) ;
- if $(value-string)
- {
- validate-value-string $(feature) $(value-string) ;
- }
-
- local subfeature-name = [ get-subfeature-name $(subfeature) $(value-string) ] ;
-
- return $(subfeature-name)
- $(feature)$(value-string:E="")<>$(subvalues).subfeature ;
-}
-
-
-# Extends the given subfeature with the subvalues. If the optional value-string
-# is provided, the subvalues are only valid for the given value of the feature.
-# Thus, you could say that <target-platform>mingw is specific to
-# <toolset>gcc-2.95.2 as follows:
-#
-# extend-subfeature toolset gcc-2.95.2 : target-platform : mingw ;
-#
-rule extend-subfeature (
- feature # The feature whose subfeature is being extended.
-
- value-string ? # If supplied, specifies a specific value of the main
- # feature for which the new subfeature values are valid.
-
- : subfeature # Subfeature name.
- : subvalues * # Additional subfeature values.
-)
-{
- local subfeature-vars = [ subvalue-var $(feature) $(value-string)
- : $(subfeature) : $(subvalues) ] ;
-
- local f = [ utility.ungrist [ grist $(feature) ] ] ;
- extend $(f)-$(subfeature-vars[1]) : $(subvalues) ;
-
- # Provide a way to get from the given feature or property and subfeature
- # value to the subfeature name.
- $(subfeature-vars[2-]) = $(subfeature-vars[1]) ;
-}
-
-
-# Returns true iff the subvalues are valid for the feature. When the optional
-# value-string is provided, returns true iff the subvalues are valid for the
-# given value of the feature.
-#
-rule is-subvalue ( feature : value-string ? : subfeature : subvalue )
-{
- local subfeature-vars = [ subvalue-var $(feature) $(value-string)
- : $(subfeature) : $(subvalue) ] ;
-
- if $($(subfeature-vars[2])) = $(subfeature-vars[1])
- {
- return true ;
- }
-}
-
-
-# Can be called three ways:
-#
-# 1. extend feature : values *
-# 2. extend <feature> subfeature : values *
-# 3. extend <feature>value-string subfeature : values *
-#
-# * Form 1 adds the given values to the given feature.
-# * Forms 2 and 3 add subfeature values to the given feature.
-# * Form 3 adds the subfeature values as specific to the given property
-# value-string.
-#
-rule extend ( feature-or-property subfeature ? : values * )
-{
- local feature ; # If a property was specified this is its feature.
- local value-string ; # E.g., the gcc-2.95-2 part of <toolset>gcc-2.95.2.
-
- # If a property was specified.
- if $(feature-or-property:G) && $(feature-or-property:G=)
- {
- # Extract the feature and value-string, if any.
- feature = $(feature-or-property:G) ;
- value-string = $(feature-or-property:G=) ;
- }
- else
- {
- feature = [ grist $(feature-or-property) ] ;
- }
-
- # Dispatch to the appropriate handler.
- if $(subfeature)
- {
- extend-subfeature $(feature) $(value-string) : $(subfeature)
- : $(values) ;
- }
- else
- {
- # If no subfeature was specified, we do not expect to see a
- # value-string.
- if $(value-string)
- {
- errors.error can only specify a property as the first argument when
- extending a subfeature
- : usage:
- : " extend" feature ":" values...
- : " | extend" <feature>value-string subfeature ":" values...
- ;
- }
-
- extend-feature $(feature) : $(values) ;
- }
-}
-
-
-local rule get-subfeature-name ( subfeature value-string ? )
-{
- local prefix = $(value-string): ;
- return $(prefix:E="")$(subfeature) ;
-}
-
-
-# Declares a subfeature.
-#
-rule subfeature (
- feature # Root feature that is not a subfeature.
- value-string ? # A value-string specifying which feature or subfeature
- # values this subfeature is specific to, if any.
- : subfeature # The name of the subfeature being declared.
- : subvalues * # The allowed values of this subfeature.
- : attributes * # The attributes of the subfeature.
-)
-{
- feature = [ grist $(feature) ] ;
- validate-feature $(feature) ;
-
- # Add grist to the subfeature name if a value-string was supplied.
- local subfeature-name = [ get-subfeature-name $(subfeature) $(value-string) ] ;
-
- if $(subfeature-name) in $($(feature).subfeatures)
- {
- errors.error \"$(subfeature)\" already declared as a subfeature of \"$(feature)\"
- "specific to "$(value-string) ;
- }
- $(feature).subfeatures += $(subfeature-name) ;
-
- # First declare the subfeature as a feature in its own right.
- local f = [ utility.ungrist $(feature) ] ;
- feature $(f)-$(subfeature-name) : $(subvalues) : $(attributes) subfeature ;
-
- # Now make sure the subfeature values are known.
- extend-subfeature $(feature) $(value-string) : $(subfeature) : $(subvalues) ;
-}
-
-
-# Set components of the given composite property.
-#
-rule compose ( composite-property : component-properties * )
-{
- local feature = $(composite-property:G) ;
- if ! ( composite in [ attributes $(feature) ] )
- {
- errors.error "$(feature)" is not a composite feature ;
- }
-
- $(composite-property).components ?= ;
- if $($(composite-property).components)
- {
- errors.error components of "$(composite-property)" already set:
- $($(composite-property).components) ;
- }
-
- if $(composite-property) in $(component-properties)
- {
- errors.error composite property "$(composite-property)" cannot have itself as a component ;
- }
- $(composite-property).components = $(component-properties) ;
-}
-
-
-local rule expand-composite ( property )
-{
- return $(property)
- [ sequence.transform expand-composite : $($(property).components) ] ;
-}
-
-
-# Return all values of the given feature specified by the given property set.
-#
-rule get-values ( feature : properties * )
-{
- local result ;
-
- feature = $(:E=:G=$(feature)) ; # Add <> if necessary.
- for local p in $(properties)
- {
- if $(p:G) = $(feature)
- {
- # Use MATCH instead of :G= to get the value, in order to preserve
- # the value intact instead of having bjam treat it as a decomposable
- # path.
- result += [ MATCH ">(.*)" : $(p) ] ;
- }
- }
- return $(result) ;
-}
-
-
-rule free-features ( )
-{
- return $(free.features) ;
-}
-
-
-# Expand all composite properties in the set so that all components are
-# explicitly expressed.
-#
-rule expand-composites ( properties * )
-{
- local explicit-features = $(properties:G) ;
- local result ;
-
- # Now expand composite features.
- for local p in $(properties)
- {
- local expanded = [ expand-composite $(p) ] ;
-
- for local x in $(expanded)
- {
- if ! $(x) in $(result)
- {
- local f = $(x:G) ;
-
- if $(f) in $(free.features)
- {
- result += $(x) ;
- }
- else if ! $(x) in $(properties) # x is the result of expansion
- {
- if ! $(f) in $(explicit-features) # not explicitly-specified
- {
- if $(f) in $(result:G)
- {
- errors.error expansions of composite features result
- in conflicting values for $(f)
- : values: [ get-values $(f) : $(result) ] $(x:G=)
- : one contributing composite property was $(p) ;
- }
- else
- {
- result += $(x) ;
- }
- }
- }
- else if $(f) in $(result:G)
- {
- errors.error explicitly-specified values of non-free feature
- $(f) conflict :
- "existing values:" [ get-values $(f) : $(properties) ] :
- "value from expanding " $(p) ":" $(x:G=) ;
- }
- else
- {
- result += $(x) ;
- }
- }
- }
- }
- return $(result) ;
-}
-
-
-# Return true iff f is an ordinary subfeature of the parent-property's feature,
-# or if f is a subfeature of the parent-property's feature specific to the
-# parent-property's value.
-#
-local rule is-subfeature-of ( parent-property f )
-{
- if subfeature in $($(f).attributes)
- {
- local specific-subfeature = [ MATCH <(.*):(.*)> : $(f) ] ;
- if $(specific-subfeature)
- {
- # The feature has the form <topfeature-topvalue:subfeature>, e.g.
- # <toolset-msvc:version>.
- local feature-value = [ split-top-feature $(specific-subfeature[1])
- ] ;
- if <$(feature-value[1])>$(feature-value[2]) = $(parent-property)
- {
- return true ;
- }
- }
- else
- {
- # The feature has the form <topfeature-subfeature>, e.g.
- # <toolset-version>
- local top-sub = [ split-top-feature [ utility.ungrist $(f) ] ] ;
- if $(top-sub[2]) && <$(top-sub[1])> = $(parent-property:G)
- {
- return true ;
- }
- }
- }
-}
-
-
-# As for is-subfeature-of but for subproperties.
-#
-local rule is-subproperty-of ( parent-property p )
-{
- return [ is-subfeature-of $(parent-property) $(p:G) ] ;
-}
-
-
-# Given a property, return the subset of features consisting of all ordinary
-# subfeatures of the property's feature, and all specific subfeatures of the
-# property's feature which are conditional on the property's value.
-#
-local rule select-subfeatures ( parent-property : features * )
-{
- return [ sequence.filter is-subfeature-of $(parent-property) : $(features) ] ;
-}
-
-
-# As for select-subfeatures but for subproperties.
-#
-local rule select-subproperties ( parent-property : properties * )
-{
- return [ sequence.filter is-subproperty-of $(parent-property) : $(properties) ] ;
-}
-
-
-# Given a property set which may consist of composite and implicit properties
-# and combined subfeature values, returns an expanded, normalized property set
-# with all implicit features expressed explicitly, all subfeature values
-# individually expressed, and all components of composite properties expanded.
-# Non-free features directly expressed in the input properties cause any values
-# of those features due to composite feature expansion to be dropped. If two
-# values of a given non-free feature are directly expressed in the input, an
-# error is issued.
-#
-rule expand ( properties * )
-{
- local expanded = [ expand-subfeatures $(properties) ] ;
- return [ expand-composites $(expanded) ] ;
-}
-
-
-# Helper rule for minimize. Returns true iff property's feature is present in
-# the contents of the variable named by feature-set-var.
-#
-local rule in-features ( feature-set-var property )
-{
- if $(property:G) in $($(feature-set-var))
- {
- return true ;
- }
-}
-
-
-# Helper rule for minimize. Returns the list with the same properties, but with
-# all subfeatures moved to the end of the list.
-#
-local rule move-subfeatures-to-the-end ( properties * )
-{
- local x1 ;
- local x2 ;
- for local p in $(properties)
- {
- if subfeature in $($(p:G).attributes)
- {
- x2 += $(p) ;
- }
- else
- {
- x1 += $(p) ;
- }
- }
- return $(x1) $(x2) ;
-}
-
-
-# Given an expanded property set, eliminate all redundancy: properties that are
-# elements of other (composite) properties in the set will be eliminated.
-# Non-symmetric properties equal to default values will be eliminated unless
-# they override a value from some composite property. Implicit properties will
-# be expressed without feature grist, and sub-property values will be expressed
-# as elements joined to the corresponding main property.
-#
-rule minimize ( properties * )
-{
- # Precondition checking
- local implicits = [ set.intersection $(p:G=) : $(p:G) ] ;
- if $(implicits)
- {
- errors.error minimize requires an expanded property set, but
- \"$(implicits[1])\" appears to be the value of an un-expanded
- implicit feature ;
- }
-
- # Remove properties implied by composite features.
- local components = $($(properties).components) ;
- local x = [ set.difference $(properties) : $(components) ] ;
-
- # Handle subfeatures and implicit features.
- x = [ move-subfeatures-to-the-end $(x) ] ;
- local result ;
- while $(x)
- {
- local p fullp = $(x[1]) ;
- local f = $(p:G) ;
- local v = $(p:G=) ;
-
- # Eliminate features in implicit properties.
- if implicit in [ attributes $(f) ]
- {
- p = $(v) ;
- }
-
- # Locate all subproperties of $(x[1]) in the property set.
- local subproperties = [ select-subproperties $(fullp) : $(x) ] ;
- if $(subproperties)
- {
- # Reconstitute the joined property name.
- local sorted = [ sequence.insertion-sort $(subproperties) ] ;
- result += $(p)-$(sorted:G="":J=-) ;
-
- x = [ set.difference $(x[2-]) : $(subproperties) ] ;
- }
- else
- {
- # Eliminate properties whose value is equal to feature's default,
- # which are not symmetric and which do not contradict values implied
- # by composite properties.
-
- # Since all component properties of composites in the set have been
- # eliminated, any remaining property whose feature is the same as a
- # component of a composite in the set must have a non-redundant
- # value.
- if $(fullp) != [ defaults $(f) ]
- || symmetric in [ attributes $(f) ]
- || $(fullp:G) in $(components:G)
- {
- result += $(p) ;
- }
-
- x = $(x[2-]) ;
- }
- }
- return $(result) ;
-}
-
-
-# Combine all subproperties into their parent properties
-#
-# Requires: for every subproperty, there is a parent property. All features are
-# explicitly expressed.
-#
-# This rule probably should not be needed, but build-request.expand-no-defaults
-# is being abused for unintended purposes and it needs help.
-#
-rule compress-subproperties ( properties * )
-{
- local all-subs ;
- local matched-subs ;
- local result ;
-
- for local p in $(properties)
- {
- if ! $(p:G)
- {
- # Expecting fully-gristed properties.
- assert.variable-not-empty p:G ;
- }
-
- if ! subfeature in $($(p:G).attributes)
- {
- local subs = [ sequence.insertion-sort
- [ sequence.filter is-subproperty-of $(p) : $(properties) ] ] ;
-
- matched-subs += $(subs) ;
-
- local subvalues = -$(subs:G=:J=-) ;
- subvalues ?= "" ;
- result += $(p)$(subvalues) ;
- }
- else
- {
- all-subs += $(p) ;
- }
- }
- assert.result true : set.equal $(all-subs) : $(matched-subs) ;
- return $(result) ;
-}
-
-
-# Given an ungristed string, finds the longest prefix which is a top-level
-# feature name followed by a dash, and return a pair consisting of the parts
-# before and after that dash. More interesting than a simple split because
-# feature names may contain dashes.
-#
-local rule split-top-feature ( feature-plus )
-{
- local e = [ regex.split $(feature-plus) - ] ;
- local f = $(e[1]) ;
- local v ;
- while $(e)
- {
- if <$(f)> in $(.all-top-features)
- {
- v = $(f) $(e[2-]:J=-) ;
- }
- e = $(e[2-]) ;
- f = $(f)-$(e[1]) ;
- }
- return $(v) ;
-}
-
-
-# Given a set of properties, add default values for features not represented in
-# the set.
-#
-# Note: if there's an ordinary feature F1 and a composite feature F2 which
-# includes some value for F1 and both feature have default values then the
-# default value of F1 will be added (as opposed to the value in F2). This might
-# not be the right idea, e.g. consider:
-#
-# feature variant : debug ... ;
-# <variant>debug : .... <runtime-debugging>on
-# feature <runtime-debugging> : off on ;
-#
-# Here, when adding default for an empty property set, we'll get
-#
-# <variant>debug <runtime_debugging>off
-#
-# and that's kind of strange.
-#
-rule add-defaults ( properties * )
-{
- for local v in $(properties:G=)
- {
- if $(v) in $(properties)
- {
- errors.error add-defaults requires explicitly specified features,
- but \"$(v)\" appears to be the value of an un-expanded implicit
- feature ;
- }
- }
- # We don't add default for elements with ":" inside. This catches:
- # 1. Conditional properties --- we don't want <variant>debug:<define>DEBUG
- # to be takes as specified value for <variant>
- # 2. Free properties with ":" in values. We don't care, since free
- # properties don't have defaults.
- local xproperties = [ MATCH "^([^:]+)$" : $(properties) ] ;
- local missing-top = [ set.difference $(.all-top-features) : $(xproperties:G) ] ;
- local more = [ defaults $(missing-top) ] ;
- properties += $(more) ;
- xproperties += $(more) ;
-
- # Add defaults for subfeatures of features which are present.
- for local p in $(xproperties)
- {
- local s = $($(p:G).subfeatures) ;
- local f = [ utility.ungrist $(p:G) ] ;
- local missing-subs = [ set.difference <$(f)-$(s)> : $(properties:G) ] ;
- properties += [ defaults [ select-subfeatures $(p) : $(missing-subs) ] ] ;
- }
-
- return $(properties) ;
-}
-
-
-# Given a property-set of the form
-# v1/v2/...vN-1/<fN>vN/<fN+1>vN+1/...<fM>vM
-#
-# Returns
-# v1 v2 ... vN-1 <fN>vN <fN+1>vN+1 ... <fM>vM
-#
-# Note that vN...vM may contain slashes. This needs to be resilient to the
-# substitution of backslashes for slashes, since Jam, unbidden, sometimes swaps
-# slash direction on NT.
-#
-rule split ( property-set )
-{
- local pieces = [ regex.split $(property-set) [\\/] ] ;
- local result ;
-
- for local x in $(pieces)
- {
- if ( ! $(x:G) ) && $(result[-1]:G)
- {
- result = $(result[1--2]) $(result[-1])/$(x) ;
- }
- else
- {
- result += $(x) ;
- }
- }
-
- return $(result) ;
-}
-
-
-# Tests of module feature.
-#
-rule __test__ ( )
-{
- # Use a fresh copy of the feature module.
- prepare-test feature-test-temp ;
-
- import assert ;
- import errors : try catch ;
-
- # These are local rules and so must be explicitly reimported into the
- # testing module.
- import feature : extend-feature validate-feature select-subfeatures ;
-
- feature toolset : gcc : implicit ;
- feature define : : free ;
- feature runtime-link : dynamic static : symmetric ;
- feature optimization : on off ;
- feature variant : debug release profile : implicit composite symmetric ;
- feature stdlib : native stlport ;
- feature magic : : free ;
-
- compose <variant>debug : <define>_DEBUG <optimization>off ;
- compose <variant>release : <define>NDEBUG <optimization>on ;
-
- assert.result dynamic static : values <runtime-link> ;
- assert.result dynamic static : values runtime-link ;
-
- try ;
- {
- compose <variant>profile : <variant>profile ;
- }
- catch composite property <variant>profile cannot have itself as a component ;
-
- extend-feature toolset : msvc metrowerks ;
- subfeature toolset gcc : version : 2.95.2 2.95.3 2.95.4 3.0 3.0.1 3.0.2 ;
-
- assert.true is-subvalue toolset : gcc : version : 2.95.3 ;
- assert.false is-subvalue toolset : gcc : version : 1.1 ;
-
- assert.false is-subvalue toolset : msvc : version : 2.95.3 ;
- assert.false is-subvalue toolset : : version : yabba ;
-
- feature yabba ;
- subfeature yabba : version : dabba ;
- assert.true is-subvalue yabba : : version : dabba ;
-
- subfeature toolset gcc : platform : linux cygwin : optional ;
-
- assert.result <toolset-gcc:version>
- : select-subfeatures <toolset>gcc
- : <toolset-gcc:version>
- <toolset-msvc:version>
- <toolset-version>
- <stdlib> ;
-
- subfeature stdlib : version : 3 4 : optional ;
-
- assert.result <stdlib-version>
- : select-subfeatures <stdlib>native
- : <toolset-gcc:version>
- <toolset-msvc:version>
- <toolset-version>
- <stdlib-version> ;
-
- assert.result <toolset>gcc <toolset-gcc:version>3.0.1
- : expand-subfeatures <toolset>gcc-3.0.1 ;
-
- assert.result <toolset>gcc <toolset-gcc:version>3.0.1 <toolset-gcc:platform>linux
- : expand-subfeatures <toolset>gcc-3.0.1-linux ;
-
- assert.result <toolset>gcc <toolset-gcc:version>3.0.1
- : expand <toolset>gcc <toolset-gcc:version>3.0.1 ;
-
- assert.result <define>foo=x-y
- : expand-subfeatures <define>foo=x-y ;
-
- assert.result <toolset>gcc <toolset-gcc:version>3.0.1
- : expand-subfeatures gcc-3.0.1 ;
-
- assert.result a c e
- : get-values <x> : <x>a <y>b <x>c <y>d <x>e ;
-
- assert.result <toolset>gcc <toolset-gcc:version>3.0.1
- <variant>debug <define>_DEBUG <optimization>on
- : expand gcc-3.0.1 debug <optimization>on ;
-
- assert.result <variant>debug <define>_DEBUG <optimization>on
- : expand debug <optimization>on ;
-
- assert.result <optimization>on <variant>debug <define>_DEBUG
- : expand <optimization>on debug ;
-
- assert.result <runtime-link>dynamic <optimization>on
- : defaults <runtime-link> <define> <optimization> ;
-
- # Make sure defaults is resilient to missing grist.
- assert.result <runtime-link>dynamic <optimization>on
- : defaults runtime-link define optimization ;
-
- feature dummy : dummy1 dummy2 ;
- subfeature dummy : subdummy : x y z : optional ;
-
- feature fu : fu1 fu2 : optional ;
- subfeature fu : subfu : x y z : optional ;
- subfeature fu : subfu2 : q r s ;
-
- assert.result optional : attributes <fu> ;
- assert.result optional : attributes fu ;
-
- assert.result <runtime-link>static <define>foobar <optimization>on
- <toolset>gcc:<define>FOO <toolset>gcc <variant>debug <stdlib>native
- <dummy>dummy1 <toolset-gcc:version>2.95.2
- : add-defaults <runtime-link>static <define>foobar <optimization>on
- <toolset>gcc:<define>FOO ;
-
- assert.result <runtime-link>static <define>foobar <optimization>on
- <toolset>gcc:<define>FOO <fu>fu1 <toolset>gcc <variant>debug
- <stdlib>native <dummy>dummy1 <fu-subfu2>q <toolset-gcc:version>2.95.2
- : add-defaults <runtime-link>static <define>foobar <optimization>on
- <toolset>gcc:<define>FOO <fu>fu1 ;
-
- set-default <runtime-link> : static ;
- assert.result <runtime-link>static : defaults <runtime-link> ;
-
- assert.result gcc-3.0.1 debug <optimization>on
- : minimize [ expand gcc-3.0.1 debug <optimization>on <stdlib>native ] ;
-
- assert.result gcc-3.0.1 debug <runtime-link>dynamic
- : minimize
- [ expand gcc-3.0.1 debug <optimization>off <runtime-link>dynamic ] ;
-
- assert.result gcc-3.0.1 debug
- : minimize [ expand gcc-3.0.1 debug <optimization>off ] ;
-
- assert.result debug <optimization>on
- : minimize [ expand debug <optimization>on ] ;
-
- assert.result gcc-3.0
- : minimize <toolset>gcc <toolset-gcc:version>3.0 ;
-
- assert.result gcc-3.0
- : minimize <toolset-gcc:version>3.0 <toolset>gcc ;
-
- assert.result <x>y/z <a>b/c <d>e/f
- : split <x>y/z/<a>b/c/<d>e/f ;
-
- assert.result <x>y/z <a>b/c <d>e/f
- : split <x>y\\z\\<a>b\\c\\<d>e\\f ;
-
- assert.result a b c <d>e/f/g <h>i/j/k
- : split a/b/c/<d>e/f/g/<h>i/j/k ;
-
- assert.result a b c <d>e/f/g <h>i/j/k
- : split a\\b\\c\\<d>e\\f\\g\\<h>i\\j\\k ;
-
- # Test error checking.
-
- try ;
- {
- expand release <optimization>off <optimization>on ;
- }
- catch explicitly-specified values of non-free feature <optimization> conflict ;
-
- try ;
- {
- validate-feature <foobar> ;
- }
- catch unknown feature ;
-
- validate-value-string <toolset> gcc ;
- validate-value-string <toolset> gcc-3.0.1 ;
-
- try ;
- {
- validate-value-string <toolset> digital_mars ;
- }
- catch \"digital_mars\" is not a known value of <toolset> ;
-
- try ;
- {
- feature foobar : : baz ;
- }
- catch unknown attributes: baz ;
-
- feature feature1 ;
- try ;
- {
- feature feature1 ;
- }
- catch feature already defined: ;
-
- try ;
- {
- feature feature2 : : free implicit ;
- }
- catch free features cannot also be implicit ;
-
- try ;
- {
- feature feature3 : : free propagated ;
- }
- catch free features cannot be propagated ;
-
- try ;
- {
- implied-feature lackluster ;
- }
- catch \"lackluster\" is not a value of an implicit feature ;
-
- try ;
- {
- implied-subfeature <toolset> 3.0.1 ;
- }
- catch \"3.0.1\" is not a known subfeature value of <toolset> ;
-
- try ;
- {
- implied-subfeature <toolset> not-a-version : gcc ;
- }
- catch \"not-a-version\" is not a known subfeature value of <toolset>gcc ;
-
- # Leave a clean copy of the features module behind.
- finish-test feature-test-temp ;
-}