73 lines
1.8 KiB
Perl
73 lines
1.8 KiB
Perl
#! /usr/bin/perl
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#
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# Copyright 2014, General Dynamics C4 Systems
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#
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# SPDX-License-Identifier: GPL-2.0-only
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#
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$literate = 0;
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$literate = 1 if $ARGV[0] eq "-l";
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$prefix = $literate ? "> " : "";
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# read the entire input
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$/ = undef;
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$input = <STDIN>;
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# find the module name
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$input =~ /module\s+([A-Z][a-zA-Z0-9._]*)/m or die "no module";
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$modname = $1;
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# find the lists of hs-boot imports and exports
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$input =~ /{-# BOOT-IMPORTS:((\s+#?[A-Z][a-zA-Z0-9._]+(\(.*?\))?(%[a-zA-Z]+)?)*) #-}/
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or die "no imports";
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$imports = $1;
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$input =~ /{-# BOOT-EXPORTS:((\s+#?[a-zA-Z][a-zA-Z0-9_']+(\(.*?\))?)*) #-}/
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or die "no exports";
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$exports = $1;
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# transform the import list to import statements
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$imports =~ s/\s+/\n${prefix}import /g;
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$imports =~ s/#/{-# SOURCE #-} /g;
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$imports =~ s/%/ as /g;
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# create the export list
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$explist = $exports;
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$explist =~ s/\s#\w+//g;
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$explist =~ s/(\w|\))\s/\1, /g;
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# print the module & import statements
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print "${prefix}-- this file is automatically generated, do not edit\n";
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print "${prefix}module $modname($explist) where\n${prefix}import Prelude hiding(Word)\n$imports\n\n";
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$exports =~ s/#//g;
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$exports =~ s/\(.*?\)//g;
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# find and print all the type definitions...
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while($exports =~ / ([A-Z][a-zA-Z0-9']*)/g) {
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$name = $1;
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if (not $literate and
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$input =~ /^((type|newtype|data|class)\s+([A-Z][a-zA-Z0-9_' ]*=>\s+)?$name\W.*?)^\S/ms)
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{
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print "$1";
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} elsif ($literate and
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$input =~ /^(> (type|newtype|data|class)\s+([A-Z][a-zA-Z0-9_' ]*=>\s+)?$name\W.*?)^> \S/ms)
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{
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print "$1";
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}
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}
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# ...and the type signatures
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while($exports =~ / ([a-z][a-zA-Z0-9']*)/g) {
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$name = $1;
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if (not $literate and $input =~ /^($name\s+::.*?)^\S/ms) {
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print "$1";
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} elsif ($literate and $input =~ /^(> $name\s+::.*?)^> \S/ms) {
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print "$1";
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}
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}
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