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# Vocabulary generation utilities
#
# Copyright (C) 2021 Ngô Ngọc Đức Huy
#
# This file is a part of CreLang-corelibs and was cherry-picked for this document.
#
# CreLang-corelibs 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 of the License, or
# (at your option) any later version.
#
# CreLang-corelibs 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 CreLang-corelibs. If not, see <https://www.gnu.org/licenses/>.
use v6;
enum ParseCategoryError <LongLHS EmptyLHS EmptyRHS>;
sub get-categories ($raw-input) is export {
my %categories;
for $raw-input.lines -> $line {
next unless $line;
my ($left, $right) = $line.split("=");
my $key = $left.trim;
my @symbols = $right.words;
die LongLHS if $key.chars > 1;
die EmptyLHS if $key.chars == 0;
die EmptyRHS if @symbols.elems == 0;
%categories{$left.trim} = $right.words;
}
return %categories;
};
sub generate-words ($pattern, %categories) is export {
my @generated-words;
sub support ($to-do, $so-far) {
if $to-do.chars == 0 {
@generated-words.push: $so-far;
return;
}
my $current = $to-do.substr(0, 1);
my $remainder = $to-do.substr(1);
die "Invalid category: $current" unless
$current ∈ %categories.keys;
for @(%categories{$current}) -> $char {
support($remainder, $so-far ~ $char)
}
}
support($pattern, "");
return @generated-words;
}
sub rewrite ($rules, $word) {
my $ret = $word;
for $rules.lines -> $rule {
my ($left, $right) = $rule.split(",");
if $word.match($left) {
$ret = $ret.subst($left, $right)
}
}
return $ret
}
my $category-input = slurp "categories";
my $rewrite-rules = slurp "rewrite";
my $categories = get-categories($category-input);
my @possible-syllables;
for "patterns".IO.lines -> $pattern {
@possible-syllables.append: generate-words($pattern, $categories);
}
sub MAIN($max-syllables, $n-outputs) {
# my $output = open "output.txt", :w;
for (1..$n-outputs) {
my $word = '';
my $n-syllables = $max-syllables.rand.ceiling;
for (1..$n-syllables) {
$word ~= @possible-syllables[@possible-syllables.elems.rand.floor];
}
# $output.say(rewrite($rewrite-rules, $word))
say rewrite($rewrite-rules, $word)
}
# $output.close
}
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