tools/build/v2/build/feature.jam
# (C) Copyright David Abrahams 2001. Permission to copy, use, modify, sell and
# distribute this software is granted provided this copyright notice appears in
# all copies. This software is provided "as is" without express or implied
# warranty, and with no claim as to its suitability for any purpose.
import "class" : * ;
import errors : error lol->list ;
import sequence ;
import regex ;
import set ;
import utility ;
import modules indirect ;
import assert : * ;
local rule setup ( )
{
.all-attributes =
implicit
executed
composite
optional
symmetric
free
incidental
path
dependency
propagated
link-incompatible
subfeature
;
.all-features = ;
.all-subfeatures = ; # non-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 aren't already
# bracketed by "<>"
local rule grist ( features * )
{
local empty = "" ;
local r = $(empty:G=$(features)) ;
return $(r) ;
}
empty = "" ;
# declare a new feature with the given name, values, and attributes.
rule feature (
name # feature name
: values * # the allowable values - may be extended later with feature.extend
: attributes * # The feature's attributes (e.g. implicit, free, propagated...)
)
{
name = [ grist $(name) ] ;
local error ;
# if there are 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 ;
}
if $(error)
{
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) ;
}
# set default value of the given feature, overriding any previous
# default.
rule set-default ( feature : value )
{
local f = [ grist $(feature) ] ;
if ! $(value) in $($(f).values)
{
errors.error "The specified default value, '$(value)' is invalid"
: "allowed values are: " $($(f).values) ;
}
$(f).default = $(value) ;
}
# return the default property values for the given features.
rule defaults ( features * )
{
local result ;
for local f in $(features)
{
local a = $($(f).attributes) ;
if ( free in $(a) ) || ( optional in $(a) )
{
}
else
{
result += $(f)$($(f).default) ;
}
}
return $(result) ;
}
# returns true iff all elements of names are valid features.
rule valid ( names + )
{
if $(names) in $(.all-features)
{
return true ;
}
}
# return the attibutes of the given feature
rule attributes ( feature )
{
if ! [ valid $(feature) ]
{
error \"$(feature)\" is not a valid feature name ;
}
return $($(feature).attributes) ;
}
# return the values of the given feature
rule values ( feature )
{
return $($(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 ;
}
}
# return 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 ! $(feature)
{
error \"$(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)
{
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 ! $(subfeature)
{
value-string ?= "" ;
error \"$(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 $(.all-features)
{
error unknown feature \"$(feature)\" ;
}
}
# Given a feature and value, or just a value corresponding to an
# implicit feature, returns a property set consisting of all component
# subfeatures and their values. For example:
#
# expand-subfeatures <toolset>gcc-2.95.2-linux-x86
# -> <toolset>gcc <toolset-version>2.95.2 <toolset-os>linux <toolset-cpu>x86
#
# equivalent to:
# expand-subfeatures gcc-2.95.2-linux-x86
local rule expand-subfeatures-aux (
feature ? # The name of the feature, or empty if value corresponds to an implicit property
: value # The value of the feature.
)
{
if $(feature)
{
feature = $(feature) ;
}
if ! $(feature)
{
feature = [ implied-feature $(value) ] ;
}
else
{
validate-feature $(feature) ;
}
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)) ;
}
}
# Add all the default feature values for non-optional subfeatures.
local ungristed-feature = [ utility.ungrist $(feature) ] ;
for local s in $($(feature).subfeatures)
{
local full-name = <$(ungristed-feature)-$(s)> ;
if ! optional in $($(full-name).attributes)
&& [ is-subfeature-of $(result[1]) $(full-name) ]
{
if ! $(full-name) in $(result:G)
{
result += $(full-name)$($(full-name).default) ;
}
}
}
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, the property
#
# 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.
)
{
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=) ] ;
}
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)
{
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,
# take it as default value
$(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)
{
values = [ regex.split $(value-string) - ] ;
}
if ! ( $(values[1]) in $($(feature).values) )
{
error \"$(values[1])\" is not a known value of feature $(feature)
: legal values: \"$($(feature).values)\" ;
}
if $(values[2])
{
# this will validate any subfeature values in value-string
implied-subfeature $(feature) [ sequence.join $(values[2-]) : - ]
: $(values[1]) ;
}
}
}
# 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 specifc 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 # The name of the subfeature
: subvalues * # The additional values of the subfeature being defined.
)
{
feature = [ grist $(feature) ] ;
validate-feature $(feature) ;
if $(value-string)
{
validate-value-string $(feature) $(value-string) ;
}
local subfeature-name = [ get-subfeature-name $(subfeature) $(value-string) ] ;
local f = [ utility.ungrist $(feature) ] ;
extend $(f)-$(subfeature-name) : $(subvalues) ;
# provide a way to get from the given feature or property and
# subfeature value to the subfeature name.
$(feature)$(value-string:E="")<>$(subvalues).subfeature = $(subfeature-name) ;
}
# 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
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 didn't expect to see a
# value-string
if $(value-string)
{
error can only be 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)
{
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 the components of the given composite property
rule compose ( composite-property : component-properties * )
{
local feature = $(composite-property:G) ;
if ! ( composite in [ attributes $(feature) ] )
{
error "$(feature)" is not a composite feature ;
}
$(composite-property).components ?= ;
if $($(composite-property).components)
{
error components of "$(composite-property)" already set:
$($(composite-property).components) ;
}
if $(composite-property) in $(components)
{
errror composite property "$(composite-property)" cannot have itself as a component ;
}
$(composite-property).components = $(component-properties) ;
}
local rule has-attribute ( attribute property )
{
if $(attribute) in [ attributes [ get-feature $(property) ] ]
{
return true ;
}
}
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 ;
for local p in $(properties)
{
if $(p:G) = $(feature)
{
result += $(p:G=) ;
}
}
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)
{
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)
{
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 fo 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 above, 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 above, 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, below - return 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 for minimize, below - returns the list with
# the same properties, but where all subfeatures
# are in 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
# which are elements of other (composite) properties in the set will
# be eliminated. Non-symmetric properties equal to default values will be
# eliminated, unless the 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 $(implicits)
{
error minimize requires an expanded property set, but \"$(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 and 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 shouldn't 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 matched-subs result ;
for local p in $(properties)
{
if ! $(p:G)
{
assert.nonempty-variable p:G ; # expecting fully-gristed properties
}
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 can 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 there's ordinary feature F1 and composite feature
# F2, which includes some value for F1, and both feature have default values,
# then the default value of F1 will be added, not the value in F2. This might
# not be right idea: 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 $(properties)
{
error add-defaults requires explicitly specified features,
but \"$(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 is 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 $(result) ;
}
# Appends a rule to the list of rules assigned to the given feature or property.
# That rules will be used in extending property sets by the 'run-actions' rule.
# The rule should accept two arguments:
# - the property which is registered
# - the list of all properties
# and return a set of additional
# properties to be added. Property should be specified in the usual way:
# <feature>value, and feature should be specified as <feature>.
rule action ( property-or-feature : rule-name )
{
.rules.$(property-or-feature) += [ indirect.make-qualified $(rule-name) ] ;
}
# Returns 'properties' augmented with results of calling rule associated with properties.
# If both a property and its feature have rules, only rules for the property are executed.
rule run-actions ( properties * )
{
local added = ;
for local e in $(properties)
{
local rules ;
if $(.rules.$(e))
{
rules = $(.rules.$(e)) ;
}
else if $(.rules.$(e:G))
{
rules = $(.rules.$(e:G)) ;
}
for local r in $(rules)
{
added += [ indirect.call $(r) $(e) : $(properties) ] ;
}
}
return $(properties) $(added) ;
}
# tests of module feature
local rule __test__ ( )
{
# use a fresh copy of the feature module
prepare-test feature-test-temp ;
# These are local rules and so must be explicitly reimported into
# the testing module
import feature : extend-feature validate-feature select-subfeatures ;
import errors : try catch ;
import assert ;
feature toolset : gcc : implicit ;
feature define : : free ;
feature runtime-link : dynamic static : symmetric ;
feature optimization : on off ;
feature variant : debug release : implicit composite symmetric ;
feature stdlib : native stlport ;
feature magic : : free ;
compose <variant>debug : <define>_DEBUG <optimization>off ;
compose <variant>release : <define>NDEBUG <optimization>on ;
extend-feature toolset : msvc metrowerks ;
subfeature toolset gcc : version : 2.95.2 2.95.3 2.95.4
3.0 3.0.1 3.0.2 : optional ;
local rule handle-stlport ( property : properties * )
{
return <include>/path/to/stlport ;
}
local rule handle-magic ( property : properties * )
{
return <define>MAGIC=$(property:G=) ;
}
local rule handle-magic2 ( property : properties * )
{
return <define>MAGIC=BIG_MAGIC ;
}
local rule handle-magic3 ( property : properties * )
{
return <define>MAGIC=VERY_BIG_MAGIC ;
}
action <stdlib>stlport : handle-stlport ;
action <magic> : handle-magic ;
action <magic>17 : handle-magic2 ;
action <magic>17 : handle-magic3 ;
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 <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 ;
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 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 <fu>fu1 <fu-subfu2>q
: expand-subfeatures <fu>fu1
;
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>
;
assert.result <runtime-link>static <define>foobar <optimization>on <toolset>gcc:<define>FOO
<toolset>gcc <variant>debug <stdlib>native <dummy>dummy1
: 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
: 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 <toolset>gcc <define>foo <stdlib>stlport <magic>3 <include>/path/to/stlport <define>MAGIC=3
: run-actions <toolset>gcc <define>foo <stdlib>stlport <magic>3
;
assert.result <magic>17 <define>MAGIC=BIG_MAGIC <define>MAGIC=VERY_BIG_MAGIC
: run-actions <magic>17
;
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 ;
}
