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Add backreferencing "test" :(

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Robert Krimen 2012-10-20 13:57:13 -07:00
parent cd4f36ce98
commit 2390419e97
3 changed files with 8 additions and 4 deletions
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5
README.markdown
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@ -97,9 +97,10 @@ For more information: http://github.com/robertkrimen/otto/tree/master/underscore
Go translates JavaScript-style regular expressions into something that is regexp package compatible. Go translates JavaScript-style regular expressions into something that is regexp package compatible.
Unfortunately, JavaScript has positive and negative lookahead, which is not supported by Go's re2-like engine: https://code.google.com/p/re2/wiki/Syntax Unfortunately, JavaScript has positive lookahead, negative lookahead, and backreferencing,
all of which are not supported by Go's re2-like engine: https://code.google.com/p/re2/wiki/Syntax
A brief discussion of this limitation: "Regexp (?!re)" https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/7qgSDWPIh_E A brief discussion of these limitations: "Regexp (?!re)" https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/7qgSDWPIh_E
### UTF-8 UTF-16 ### UTF-8 UTF-16

5
otto.go
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@ -94,9 +94,10 @@ Regular Expression Syntax
Go translates JavaScript-style regular expressions into something that is regexp package compatible. Go translates JavaScript-style regular expressions into something that is regexp package compatible.
Unfortunately, JavaScript has positive and negative lookahead, which is not supported by Go's re2-like engine: https://code.google.com/p/re2/wiki/Syntax Unfortunately, JavaScript has positive lookahead, negative lookahead, and backreferencing,
all of which are not supported by Go's re2-like engine: https://code.google.com/p/re2/wiki/Syntax
A brief discussion of this limitation: "Regexp (?!re)" https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/7qgSDWPIh_E A brief discussion of these limitations: "Regexp (?!re)" https://groups.google.com/forum/?fromgroups=#!topic/golang-nuts/7qgSDWPIh_E
UTF-8 UTF-16 UTF-8 UTF-16

2
parser_test.go
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@ -1413,6 +1413,8 @@ Label '_' has already been declared
Unexpected token ILLEGAL Unexpected token ILLEGAL
0:0:0 0:0:0
`) `)
test("/\\1/.source", "---\nInvalid regular expression: invalid escape sequence: `\\1`\n-:-:-")
} }
func TestParseComment(t *testing.T) { func TestParseComment(t *testing.T) {