Portability	non-portable
Stability	experimental
Maintainer	virukav@gmail.com

Hsed.Ast

Description

The main types used in the program

Synopsis

Documentation

data SedCmd Source

Editing commands

Constructors

SedCmd Address SedFun

Instances

Show SedCmd

data SedFun Source

Functions represents a single-character command verb

Constructors

Group [SedCmd]	{ - group of the sed commands
LineNum	= - write to standard output the current line number
Append Text	a - append text following each line matched by address
Branch (Maybe Label)	b - transfer control to Label
Change Text	c - replace the lines selected by the address with Text
DeleteLine	d - delete line(s) from pattern space
DeletePat	D - delete (up to newline) of multiline pattern space
ReplacePat	g - copy hold space into the pattern space
AppendPat	G - add newline followed by hold space into the pattern space
ReplaceHold	h - copy pattern space into hold space
AppendHold	H - add newline followed by pattern space into the hold space
Insert Text	i - insert Text before each line matched by address
List	l - list the pattern space, showing non-printing chars in ASCII
NextLine	n - read next line of input into pattern space
AppendLinePat	N - add next input line and newline into pattern space
PrintPat	p - print the addressed line(s)
WriteUpPat	P - print (up to newline) of multiline pattern space
Quit	q - quit when address is encounterd
ReadFile FilePath	r - add contents of file to the pattern space
Substitute Pattern Replacement Flags	s - substitute Replacement for Pattern
Test (Maybe Label)	t - branch to line marked by :label if substitution was made
WriteFile FilePath	w - write the line to file if a replacement was done
Exchange	x - exchange pattern space with hold space
Transform Text Text	y - transform each char by position in Text to Text
Label Label	: - label a line in the scipt for transfering by b or t.
Comment	n" in the first line
EmptyCmd	ignore spaces

Instances

Show SedFun

data Addr Source

An address is either a decimal number that counts input lines cumulatively across files, a $ character that addresses the last line of input, or a context address as BRE

Constructors

LineNumber Int
LastLine
Pat Pattern

Instances

Show Addr

data Address Source

A permissable address is representing by zero, one or two addresses

Constructors

Address (Maybe Addr) (Maybe Addr) Invert

Instances

Show Address

data Occurrence Source

Used in the replacement string. An appersand (&) will be replaced by the string matched the BRE. The characters n, where n is a digit will be replaced by the corresponding back-reference expression.

Constructors