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Implement negative conditional requirements.

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For example: <threading>!single:<library>pthread


[SVN r66697]
This commit is contained in:
Vladimir Prus
2010-11-23 07:16:28 +00:00
parent a9c45135e5
commit f5deaec106
1 changed files with 39 additions and 3 deletions
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42
src/build/property.jam
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@@ -112,12 +112,48 @@ rule evaluate-conditionals-in-context ( properties * : context * )
# Separate condition and property.
local s = [ MATCH (.*):(<.*) : $(p) ] ;
# Split condition into individual properties.
local c = [ regex.split $(s[1]) "," ] ;
local condition = [ regex.split $(s[1]) "," ] ;
# Evaluate condition.
if $(c) in $(context)
if ! [ MATCH (!).* : $(condition:G=) ]
{
result += $(s[2]) ;
# Only positive checks
if $(condition) in $(context)
{
result += $(s[2]) ;
}
}
else
{
# Have negative checks
local fail ;
while $(condition)
{
local c = $(condition[1]) ;
local m = [ MATCH !(.*) : $(c) ] ;
if $(m)
{
local p = $(m:G=$(c:G)) ;
if $(p) in $(context)
{
fail = true ;
c = ;
}
}
else
{
if ! $(c) in $(context)
{
fail = true ;
c = ;
}
}
condition = $(condition[2-]) ;
}
if ! $(fail)
{
result += $(s[2]) ;
}
}
}
return $(result) ;
}