internal

Documentation

Index

• func QuoteForError(s string) string
• func Release(re *Regexp)
• type CompileOptions
• type Regexp
  • func Compile(expr string, opts CompileOptions) (*Regexp, error)
  • func (re *Regexp) Copy() *Regexp
  • func (re *Regexp) Expand(dst []byte, template []byte, src []byte, match []int) []byte
  • func (re *Regexp) ExpandString(dst []byte, template string, src string, match []int) []byte
  • func (re *Regexp) Find(b []byte) []byte
  • func (re *Regexp) FindAll(b []byte, n int) [][]byte
  • func (re *Regexp) FindAllIndex(b []byte, n int) [][]int
  • func (re *Regexp) FindAllString(s string, n int) []string
  • func (re *Regexp) FindAllStringIndex(s string, n int) [][]int
  • func (re *Regexp) FindAllStringSubmatch(s string, n int) [][]string
  • func (re *Regexp) FindAllStringSubmatchIndex(s string, n int) [][]int
  • func (re *Regexp) FindAllSubmatch(b []byte, n int) [][][]byte
  • func (re *Regexp) FindAllSubmatchIndex(b []byte, n int) [][]int
  • func (re *Regexp) FindIndex(b []byte) (loc []int)
  • func (re *Regexp) FindString(s string) string
  • func (re *Regexp) FindStringIndex(s string) (loc []int)
  • func (re *Regexp) FindStringSubmatch(s string) []string
  • func (re *Regexp) FindStringSubmatchIndex(s string) []int
  • func (re *Regexp) FindSubmatch(b []byte) [][]byte
  • func (re *Regexp) FindSubmatchIndex(b []byte) []int
  • func (re *Regexp) Longest()
  • func (re *Regexp) Match(b []byte) bool
  • func (re *Regexp) MatchString(s string) bool
  • func (re *Regexp) NumSubexp() int
  • func (re *Regexp) ReplaceAll(src, repl []byte) []byte
  • func (re *Regexp) ReplaceAllLiteral(src, repl []byte) []byte
  • func (re *Regexp) ReplaceAllLiteralString(src, repl string) string
  • func (re *Regexp) ReplaceAllString(src, repl string) string
  • func (re *Regexp) Split(s string, n int) []string
  • func (re *Regexp) String() string
  • func (re *Regexp) SubexpIndex(name string) int
  • func (re *Regexp) SubexpNames() []string

Functions

func QuoteForError

func QuoteForError(s string) string

func Release

func Release(re *Regexp)

Types

type CompileOptions

type CompileOptions struct {
	Posix           bool
	Longest         bool
	CaseInsensitive bool
	Latin1          bool
}

type Regexp

type Regexp struct {
	// contains filtered or unexported fields
}

func Compile

func Compile(expr string, opts CompileOptions) (*Regexp, error)

func (*Regexp) Copy

func (re *Regexp) Copy() *Regexp

Copy returns a new Regexp object copied from re. Calling Longest on one copy does not affect another.

Deprecated: In earlier releases, when using a Regexp in multiple goroutines, giving each goroutine its own copy helped to avoid lock contention. As of Go 1.12, using Copy is no longer necessary to avoid lock contention. Copy may still be appropriate if the reason for its use is to make two copies with different Longest settings.

func (*Regexp) Expand

func (re *Regexp) Expand(dst []byte, template []byte, src []byte, match []int) []byte

Expand appends template to dst and returns the result; during the append, Expand replaces variables in the template with corresponding matches drawn from src. The match slice should have been returned by FindSubmatchIndex.

In the template, a variable is denoted by a substring of the form $name or ${name}, where name is a non-empty sequence of letters, digits, and underscores. A purely numeric name like $1 refers to the submatch with the corresponding index; other names refer to capturing parentheses named with the (?P<name>...) syntax. A reference to an out of range or unmatched index or a name that is not present in the regular expression is replaced with an empty slice.

In the $name form, name is taken to be as long as possible: $1x is equivalent to ${1x}, not ${1}x, and, $10 is equivalent to ${10}, not ${1}0.

To insert a literal $ in the output, use $$ in the template.

func (*Regexp) ExpandString

func (re *Regexp) ExpandString(dst []byte, template string, src string, match []int) []byte

ExpandString is like Expand but the template and source are strings. It appends to and returns a byte slice in order to give the calling code control over allocation.

func (*Regexp) Find

func (re *Regexp) Find(b []byte) []byte

Find returns a slice holding the text of the leftmost match in b of the regular expression. A return value of nil indicates no match.

func (*Regexp) FindAll

func (re *Regexp) FindAll(b []byte, n int) [][]byte

FindAll is the 'All' version of Find; it returns a slice of all successive matches of the expression, as defined by the 'All' description in the package comment. A return value of nil indicates no match.

func (*Regexp) FindAllIndex

func (re *Regexp) FindAllIndex(b []byte, n int) [][]int

FindAllIndex is the 'All' version of FindIndex; it returns a slice of all successive matches of the expression, as defined by the 'All' description in the package comment. A return value of nil indicates no match.

func (*Regexp) FindAllString

func (re *Regexp) FindAllString(s string, n int) []string

FindAllString is the 'All' version of FindString; it returns a slice of all successive matches of the expression, as defined by the 'All' description in the package comment. A return value of nil indicates no match.

func (*Regexp) FindAllStringIndex

func (re *Regexp) FindAllStringIndex(s string, n int) [][]int

FindAllStringIndex is the 'All' version of FindStringIndex; it returns a slice of all successive matches of the expression, as defined by the 'All' description in the package comment. A return value of nil indicates no match.

func (*Regexp) FindAllStringSubmatch

func (re *Regexp) FindAllStringSubmatch(s string, n int) [][]string

FindAllStringSubmatch is the 'All' version of FindStringSubmatch; it returns a slice of all successive matches of the expression, as defined by the 'All' description in the package comment. A return value of nil indicates no match.

func (*Regexp) FindAllStringSubmatchIndex

func (re *Regexp) FindAllStringSubmatchIndex(s string, n int) [][]int

FindAllStringSubmatchIndex is the 'All' version of FindStringSubmatchIndex; it returns a slice of all successive matches of the expression, as defined by the 'All' description in the package comment. A return value of nil indicates no match.

func (*Regexp) FindAllSubmatch

func (re *Regexp) FindAllSubmatch(b []byte, n int) [][][]byte

FindAllSubmatch is the 'All' version of FindSubmatch; it returns a slice of all successive matches of the expression, as defined by the 'All' description in the package comment. A return value of nil indicates no match.

func (*Regexp) FindAllSubmatchIndex

func (re *Regexp) FindAllSubmatchIndex(b []byte, n int) [][]int

FindAllSubmatchIndex is the 'All' version of FindSubmatchIndex; it returns a slice of all successive matches of the expression, as defined by the 'All' description in the package comment. A return value of nil indicates no match.

func (*Regexp) FindIndex

func (re *Regexp) FindIndex(b []byte) (loc []int)

FindIndex returns a two-element slice of integers defining the location of the leftmost match in b of the regular expression. The match itself is at b[loc[0]:loc[1]]. A return value of nil indicates no match.

func (*Regexp) FindString

func (re *Regexp) FindString(s string) string

FindString returns a string holding the text of the leftmost match in s of the regular expression. If there is no match, the return value is an empty string, but it will also be empty if the regular expression successfully matches an empty string. Use FindStringIndex or FindStringSubmatch if it is necessary to distinguish these cases.

func (*Regexp) FindStringIndex

func (re *Regexp) FindStringIndex(s string) (loc []int)

FindStringIndex returns a two-element slice of integers defining the location of the leftmost match in s of the regular expression. The match itself is at s[loc[0]:loc[1]]. A return value of nil indicates no match.

func (*Regexp) FindStringSubmatch

func (re *Regexp) FindStringSubmatch(s string) []string

func (*Regexp) FindStringSubmatchIndex

func (re *Regexp) FindStringSubmatchIndex(s string) []int

FindStringSubmatchIndex returns a slice holding the index pairs identifying the leftmost match of the regular expression in s and the matches, if any, of its subexpressions, as defined by the 'Submatch' and 'Index' descriptions in the package comment. A return value of nil indicates no match.

func (*Regexp) FindSubmatch

func (re *Regexp) FindSubmatch(b []byte) [][]byte

FindSubmatch returns a slice of slices holding the text of the leftmost match of the regular expression in b and the matches, if any, of its subexpressions, as defined by the 'Submatch' descriptions in the package comment. A return value of nil indicates no match.

func (*Regexp) FindSubmatchIndex

func (re *Regexp) FindSubmatchIndex(b []byte) []int

FindSubmatchIndex returns a slice holding the index pairs identifying the leftmost match of the regular expression in b and the matches, if any, of its subexpressions, as defined by the 'Submatch' and 'Index' descriptions in the package comment. A return value of nil indicates no match.

func (*Regexp) Longest

func (re *Regexp) Longest()

Longest makes future searches prefer the leftmost-longest match. That is, when matching against text, the regexp returns a match that begins as early as possible in the input (leftmost), and among those it chooses a match that is as long as possible. This method modifies the Regexp and may not be called concurrently with any other methods.

func (*Regexp) Match

func (re *Regexp) Match(b []byte) bool

Match reports whether the byte slice b contains any match of the regular expression re.

func (*Regexp) MatchString

func (re *Regexp) MatchString(s string) bool

MatchString reports whether the string s contains any match of the regular expression re.

func (*Regexp) NumSubexp

func (re *Regexp) NumSubexp() int

NumSubexp returns the number of parenthesized subexpressions in this Regexp.

func (*Regexp) ReplaceAll

func (re *Regexp) ReplaceAll(src, repl []byte) []byte

ReplaceAll returns a copy of src, replacing matches of the Regexp with the replacement text repl. Inside repl, $ signs are interpreted as in Expand, so for instance $1 represents the text of the first submatch.

func (*Regexp) ReplaceAllLiteral

func (re *Regexp) ReplaceAllLiteral(src, repl []byte) []byte

ReplaceAllLiteral returns a copy of src, replacing matches of the Regexp with the replacement bytes repl. The replacement repl is substituted directly, without using Expand.

func (*Regexp) ReplaceAllLiteralString

func (re *Regexp) ReplaceAllLiteralString(src, repl string) string

ReplaceAllLiteralString returns a copy of src, replacing matches of the Regexp with the replacement string repl. The replacement repl is substituted directly, without using Expand.

func (*Regexp) ReplaceAllString

func (re *Regexp) ReplaceAllString(src, repl string) string

ReplaceAllString returns a copy of src, replacing matches of the Regexp with the replacement string repl. Inside repl, $ signs are interpreted as in Expand, so for instance $1 represents the text of the first submatch.

func (*Regexp) Split

func (re *Regexp) Split(s string, n int) []string

Split slices s into substrings separated by the expression and returns a slice of the substrings between those expression matches.

The slice returned by this method consists of all the substrings of s not contained in the slice returned by FindAllString. When called on an expression that contains no metacharacters, it is equivalent to strings.SplitN.

Example:

s := regexp.MustCompile("a*").Split("abaabaccadaaae", 5)
// s: ["", "b", "b", "c", "cadaaae"]

The count determines the number of substrings to return:

n > 0: at most n substrings; the last substring will be the unsplit remainder.
n == 0: the result is nil (zero substrings)
n < 0: all substrings

func (*Regexp) String

func (re *Regexp) String() string

String returns the source text used to compile the regular expression.

func (*Regexp) SubexpIndex

func (re *Regexp) SubexpIndex(name string) int

SubexpIndex returns the index of the first subexpression with the given name, or -1 if there is no subexpression with that name.

Note that multiple subexpressions can be written using the same name, as in (?P<bob>a+)(?P<bob>b+), which declares two subexpressions named "bob". In this case, SubexpIndex returns the index of the leftmost such subexpression in the regular expression.

func (*Regexp) SubexpNames

func (re *Regexp) SubexpNames() []string

SubexpNames returns the names of the parenthesized subexpressions in this Regexp. The name for the first sub-expression is names[1], so that if m is a match slice, the name for m[i] is SubexpNames()[i]. Since the Regexp as a whole cannot be named, names[0] is always the empty string. The slice should not be modified.