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authorRĂ©mi Verschelde <rverschelde@gmail.com>2020-07-29 12:42:15 +0200
committerGitHub <noreply@github.com>2020-07-29 12:42:15 +0200
commit157958c77cd91832a8cd2f3e29cc42b71f5484c0 (patch)
tree35a7695cd1899e91b4a5277ccb63eeb787d9925f /modules
parent25c030b1c59d9123e8405de5c0f7ef9d16a4e6ad (diff)
parent5f2b6bd476327d2319f1066ab002deec586df8ec (diff)
Merge pull request #40823 from Calinou/doc-string-split-regex
Document how to perform advanced string splitting using RegEx
Diffstat (limited to 'modules')
-rw-r--r--modules/regex/doc_classes/RegEx.xml13
1 files changed, 11 insertions, 2 deletions
diff --git a/modules/regex/doc_classes/RegEx.xml b/modules/regex/doc_classes/RegEx.xml
index c00fa96b2e..312275842a 100644
--- a/modules/regex/doc_classes/RegEx.xml
+++ b/modules/regex/doc_classes/RegEx.xml
@@ -11,7 +11,7 @@
regex.compile("\\w-(\\d+)")
[/codeblock]
The search pattern must be escaped first for GDScript before it is escaped for the expression. For example, [code]compile("\\d+")[/code] would be read by RegEx as [code]\d+[/code]. Similarly, [code]compile("\"(?:\\\\.|[^\"])*\"")[/code] would be read as [code]"(?:\\.|[^"])*"[/code].
- Using [method search] you can find the pattern within the given text. If a pattern is found, [RegExMatch] is returned and you can retrieve details of the results using functions such as [method RegExMatch.get_string] and [method RegExMatch.get_start].
+ Using [method search], you can find the pattern within the given text. If a pattern is found, [RegExMatch] is returned and you can retrieve details of the results using methods such as [method RegExMatch.get_string] and [method RegExMatch.get_start].
[codeblock]
var regex = RegEx.new()
regex.compile("\\w-(\\d+)")
@@ -19,7 +19,7 @@
if result:
print(result.get_string()) # Would print n-0123
[/codeblock]
- The results of capturing groups [code]()[/code] can be retrieved by passing the group number to the various functions in [RegExMatch]. Group 0 is the default and will always refer to the entire pattern. In the above example, calling [code]result.get_string(1)[/code] would give you [code]0123[/code].
+ The results of capturing groups [code]()[/code] can be retrieved by passing the group number to the various methods in [RegExMatch]. Group 0 is the default and will always refer to the entire pattern. In the above example, calling [code]result.get_string(1)[/code] would give you [code]0123[/code].
This version of RegEx also supports named capturing groups, and the names can be used to retrieve the results. If two or more groups have the same name, the name would only refer to the first one with a match.
[codeblock]
var regex = RegEx.new()
@@ -34,6 +34,15 @@
print(result.get_string("digit"))
# Would print 01 03 0 3f 42
[/codeblock]
+ [b]Example of splitting a string using a RegEx:[/b]
+ [codeblock]
+ var regex = RegEx.new()
+ regex.compile("\\S+") # Negated whitespace character class.
+ var results = []
+ for match in regex.search_all("One Two \n\tThree"):
+ results.push_back(match.get_string())
+ # The `results` array now contains "One", "Two", "Three".
+ [/codeblock]
[b]Note:[/b] Godot's regex implementation is based on the [url=https://www.pcre.org/]PCRE2[/url] library. You can view the full pattern reference [url=https://www.pcre.org/current/doc/html/pcre2pattern.html]here[/url].
[b]Tip:[/b] You can use [url=https://regexr.com/]Regexr[/url] to test regular expressions online.
</description>