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Added a "replace" rule to do global string replacements.

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[SVN r18316]
This commit is contained in:
Rene Rivera
2003-04-26 06:20:49 +00:00
parent 86cec50017
commit 69e76f312f
2 changed files with 62 additions and 0 deletions
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31
new/regex.jam
View File

@@ -79,6 +79,32 @@ rule escape ( string : symbols : escape-symbol )
return $(result) ;
}
# Replaces occurances of a string in a given string. Returns the
# new string.
#
rule replace (
string # The string to modify.
match # The characters to replace.
replacement # The string to replace with.
)
{
local result = "" ;
local parts = 1 ;
while $(parts)
{
parts = [ MATCH ^(.*)($(match))(.*) : $(string) ] ;
if $(parts)
{
parts += "" ;
result = "$(replacement)$(parts[3])$(result)" ;
string = $(parts[1]) ;
}
}
string ?= "" ;
result = "$(string)$(result)" ;
return $(result) ;
}
rule __test__ ( )
{
import assert ;
@@ -107,4 +133,9 @@ rule __test__ ( )
assert.result "<?xml version=\\\"1.0\\\">"
: escape "<?xml version=\"1.0\">" : "\\\"" : "\\" ;
assert.result "string&nbsp;string&nbsp;" : replace "string string " " " "&nbsp;" ;
assert.result "&nbsp;string&nbsp;string" : replace " string string" " " "&nbsp;" ;
assert.result "string&nbsp;&nbsp;string" : replace "string string" " " "&nbsp;" ;
assert.result "-" : replace "&" "&" "-" ;
}

31
v2/util/regex.jam
View File

@@ -79,6 +79,32 @@ rule escape ( string : symbols : escape-symbol )
return $(result) ;
}
# Replaces occurances of a string in a given string. Returns the
# new string.
#
rule replace (
string # The string to modify.
match # The characters to replace.
replacement # The string to replace with.
)
{
local result = "" ;
local parts = 1 ;
while $(parts)
{
parts = [ MATCH ^(.*)($(match))(.*) : $(string) ] ;
if $(parts)
{
parts += "" ;
result = "$(replacement)$(parts[3])$(result)" ;
string = $(parts[1]) ;
}
}
string ?= "" ;
result = "$(string)$(result)" ;
return $(result) ;
}
rule __test__ ( )
{
import assert ;
@@ -107,4 +133,9 @@ rule __test__ ( )
assert.result "<?xml version=\\\"1.0\\\">"
: escape "<?xml version=\"1.0\">" : "\\\"" : "\\" ;
assert.result "string&nbsp;string&nbsp;" : replace "string string " " " "&nbsp;" ;
assert.result "&nbsp;string&nbsp;string" : replace " string string" " " "&nbsp;" ;
assert.result "string&nbsp;&nbsp;string" : replace "string string" " " "&nbsp;" ;
assert.result "-" : replace "&" "&" "-" ;
}