Text.Regex.PDeriv.String

Documentation

data Regex

The PDeriv backend spepcific Regex type

Instances

RegexOptions Regex CompOption ExecOption

Methods

blankCompOpt :: CompOption

blankExecOpt :: ExecOption

defaultCompOpt :: CompOption

defaultExecOpt :: ExecOption

setExecOpts :: ExecOption -> Regex -> Regex

getExecOpts :: Regex -> ExecOption

data CompOption

Control whether the pattern is multiline or case-sensitive like Text.Regex and whether to capture the subgroups (1, 2, etc). Controls enabling extra anchor syntax.

Constructors

CompOption

Fields

• caseSensitive :: Bool

  True in blankCompOpt and defaultCompOpt

• multiline :: Bool

  False in blankCompOpt, True in defaultCompOpt. Compile for newline-sensitive matching. "By default, newline is a completely ordinary character with no special meaning in either REs or strings. With this flag, inverted bracket expressions and . never match newline, a ^ anchor matches the null string after any newline in the string in addition to its normal function, and the $ anchor matches the null string before any newline in the string in addition to its normal function."

• rightAssoc :: Bool

  True (and therefore Right associative) in blankCompOpt and defaultCompOpt

• newSyntax :: Bool

  False in blankCompOpt, True in defaultCompOpt.

• lastStarGreedy :: Bool

  False by default. This is POSIX correct but it takes space and is slower. Setting this to true will improve performance, and should be done if you plan to set the captureGroups execoption to False.

Instances

Read CompOption

Methods

readsPrec :: Int -> ReadS CompOption

readList :: ReadS [CompOption]

readPrec :: ReadPrec CompOption

readListPrec :: ReadPrec [CompOption]

Show CompOption

Methods

showsPrec :: Int -> CompOption -> ShowS

show :: CompOption -> String

showList :: [CompOption] -> ShowS

RegexOptions Regex CompOption ExecOption

Methods

blankCompOpt :: CompOption

blankExecOpt :: ExecOption

defaultCompOpt :: CompOption

defaultExecOpt :: ExecOption

setExecOpts :: ExecOption -> Regex -> Regex

getExecOpts :: Regex -> ExecOption

data ExecOption

Constructors

ExecOption

Fields

• captureGroups :: Bool

  True by default. Set to False to improve speed (and space).

Instances

Read ExecOption

Methods

readsPrec :: Int -> ReadS ExecOption

readList :: ReadS [ExecOption]

readPrec :: ReadPrec ExecOption

readListPrec :: ReadPrec [ExecOption]

Show ExecOption

Methods

showsPrec :: Int -> ExecOption -> ShowS

show :: ExecOption -> String

showList :: [ExecOption] -> ShowS

RegexOptions Regex CompOption ExecOption

Methods

blankCompOpt :: CompOption

blankExecOpt :: ExecOption

defaultCompOpt :: CompOption

defaultExecOpt :: ExecOption

setExecOpts :: ExecOption -> Regex -> Regex

getExecOpts :: Regex -> ExecOption

defaultCompOpt :: RegexOptions regex compOpt execOpt => compOpt

defaultExecOpt :: RegexOptions regex compOpt execOpt => execOpt

compile

Arguments

:: CompOption

Flags (summed together)

-> ExecOption

Flags (summed together)

-> String

The regular expression to compile

-> Either String Regex

Returns: the compiled regular expression

execute

Arguments

:: Regex

Compiled regular expression

-> String

String to match against

-> Either String (Maybe Env)

regexec

Arguments

:: Regex

Compiled regular expression

-> String

String to match against

-> Either String (Maybe (String, String, String, [String]))