hs(9)

SYNOPSIS

hs - Haskell programming language

FILES

hkhask.emf - Haskell programming language hook definition
hask.eaf - Haskell programming language abbreviation file
hask.etf - Haskell programming language template file

EXTENSIONS

.hs - Haskell

DESCRIPTION

General Editing


On creating a new file, a new header is automatically included into the file. time(2m) is by default enabled, allowing the modification time-stamp to be maintained in the header.

Hilighting


The hilighting features allow commands, variables, logical, comments, strings and characters of the language to be differentiated and rendered in different colors.

Auto Layout


The command indent(2) performs automatic layout of the text.

Comments may be formatted using esc o, which reformats the comments according to the current fill paragraph. If a comment commences with /***... then the comment is automatically formatted to a box.

Folding and Information Hiding


Generic folding is enabled within the Haskell file. The folds occur about functions definition containing the :: character sequences are continued until the next empty line without any character except a newline. The macro collapse-all(3) (un)folds all regions in the file, collapse-current(3) (un)folds the current region.

Navigation via Item List


The Haskell mode offers beside folding as well support for displaying an outline of the functions, if the function declaration lines contain the :: characters. The functions can be explored with easy navigation using the item-list(3)

Abbreviations


The installation comes with a default abbreviation file for Haskell file editing which can be used by writing short abbreviations like "fo" (for), "if", "ei" (else if) or "cl" (class) - and then pressing the key-binding for the expand-abbrev-handle(3) command. The list of abbreviations can be used interactively in the GUI version of MicroEmacs using the abbrev-list(3) command.

Working Environment


compile(3) may be invoked to rebuild the source, the user is prompted to save any files.

Short Cuts


The short cut keys used within the buffer are:-

C-c C-c - Comment out the current line.
C-c C-d - Uncomment the current line.
C-c C-e - Comment to the end of the line with hyphens (--).
esc q - Format a comment.
esc o - Format a comment.
f2 - (Un)fold the current region.
C-f2 - (Un)fold all regions.
f6 - List items.
esc f6 - Close item list,

NOTES

The hilighting or the addition of new item list matches is typically extended using a file myhask.emf.

SEE ALSO

abbrev-list(3), collapse-all(3), collapse-current(3), compile(3), expand-abbrev-handle(3), time(2m).

Supported File Types

(c) Copyright JASSPA 2025
Last Modified: 2025/11/09
Generated On: 2025/12/01