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# a2ps style sheet for Haskell
# Copyright (c) 1999-2000 Ilya Beylin, Akim Demaille, Miguel Santana
# This file is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; see the file COPYING. If not, write to
# the Free Software Foundation, 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
# this file: ftp://ftp.cs.chalmers.se/pub/users/ilya/a2ps/haskell.ssh
# Haskell http://www.haskell.org/
# a2ps http://www.infres.enst.fr/~demaille/a2ps/
# GNU GPL http://www.gnu.org/copyleft/gpl.html
style Haskell is
written by "Ilya Beylin <ilya@cs.chalmers.se>"
version is 1.3
requires a2ps 4.12k
documentation is
"Haskell: non-strict functional programming language"
" http::/www.haskell.org/"
#Notes:
#- Haskell strings are not parsed properly. C-strings are used instead
#- maximal-munch rule is not followed in examples like ::: or ---
#- Only 7bit characters are recognised in places like operator names
#- literal Haskell (inverted commentary) is not at all supported
# Perhaps one should instead write a proper Haskell parser which would
# produce PreTeX
# A typical "sheets.map" entry:
# # Haskell programs
# *.hs haskell
end documentation
first alphabet is
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
second alphabet is
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz_\'0123456789"
case sensitive
keywords in Keyword_strong are
# the keywords of Haskell 98
"case", "class", "data", "default", "deriving", "do", "else",
"if", "import", "in", "infix", "infixl", "infixr", "instance",
"let", "module", "newtype", "of", "then", "type", "where",
# "_", "as", # these should not be highlighted
"qualified", "hiding" # special words (not reserved)
end keywords
keywords in Keyword are
# Constructors
/A-Z[a-zA-z0-9\'_]*/
end keywords
operators in Keyword_strong are
/->/, "[", "]",/`[a-zA-z0-9\'_]+`/,
# Constructor operators
/:[-!@#$%^&*+<>\/?\\=|:]*/,
# type signatures
(/^[a-z][a-zA-Z0-9\'_, ]*::.*$/ Comment_strong)
end operators
# use symbol font with -g
optional operators are
# does not look nice, and cannot be not protected
#/\\\\/ \lambda,
/->/ \rightarrow,
/<-/ \leftarrow,
/=>/ \Rightarrow,
/\/=/ \neq,
/<=/ \leq,
/>=/ \geq,
"::" \in
end operators
operators are
/[-!@#$%^&*+<>\/?\\=|]{3,}/
end operators
sequences are
# preprocessor directives
/^#/ Comment_strong,
"{-" Comment Comment "-}" Comment,
"--" Comment,
"{-#" Comment_strong Comment_strong "-}" Comment_strong,
C-string # not quite, but actual syntax is too involved
end sequences
end style
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