1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
#[macro_use] extern crate failure;
extern crate rand;
use rand::Rng;
use std::fmt::{self, Display};
mod parse;
mod words;
pub use parse::*;
pub use words::*;
const AMOUNT: u8 = 9 + 2*2;
const MIN: u8 = 3;
const MAX: u8 = 5;
pub struct WordsFile {
pub nouns: Vec<(bool, String)>,
pub endings: Vec<(bool, String)>,
pub verbs: Vec<(bool, String)>
}
impl WordsFile {
pub fn gen_noun<R: Rng>(&self, rand: &mut R) -> Word {
let &(he_she_it, ref word) = &self.nouns[rand.gen::<usize>() % self.nouns.len()];
Word::Noun(he_she_it, word.clone())
}
pub fn gen_ending<R: Rng>(&self, rand: &mut R) -> Word {
let &(_, ref word) = &self.endings[rand.gen::<usize>() % self.endings.len()];
Word::Ending(word.clone())
}
pub fn gen_verb<R: Rng>(&self, rand: &mut R) -> Word {
let &(noun, ref word) = &self.verbs[rand.gen::<usize>() % self.verbs.len()];
Word::Verb(Verb(noun, word.clone()))
}
pub fn generate<R: Rng>(&self, mut rand: R) -> Generator<R> {
let mut words = Vec::new();
let mut num_nouns = 0;
let mut num_verbs = 0;
while words.len() < AMOUNT as usize {
if num_nouns < MAX && rand.gen() {
num_nouns += 1;
words.push(self.gen_noun(&mut rand));
} else if num_verbs < MAX && rand.gen() {
num_verbs += 1;
words.push(self.gen_verb(&mut rand));
} else if num_nouns >= MIN && num_verbs >= MIN {
match rand.gen::<u8>() % 10 {
0 => words.push(self.gen_ending(&mut rand)),
1 => words.push(Word::And),
_ => {},
}
}
}
let mut gen = Generator::new(words, rand);
gen.expect_noun(None);
loop {
gen.expect_verb();
if gen.rand.gen() && gen.has_and() && gen.has_verb() {
gen.expect_and();
if gen.rand.gen() && gen.has_noun() {
gen.expect_noun(None);
}
continue;
}
break;
}
if gen.rand.gen() && gen.has_ending() {
gen.expect_ending();
}
gen
}
}
pub struct Generator<R: Rng> {
completed: Vec<Word>,
words: Vec<Word>,
rand: R
}
macro_rules! indexes {
($iter:expr) => {
$iter.map(|item| item.0)
}
}
impl<R: Rng> Generator<R> {
pub fn new(words: Vec<Word>, rand: R) -> Self {
Self {
completed: Vec::new(),
words: words,
rand: rand
}
}
pub fn sample(&mut self, words: &mut Vec<usize>) -> Word {
assert!(!words.is_empty());
self.words.remove(*self.rand.choose(&words).unwrap())
}
pub fn has_noun(&mut self) -> bool { self.words.iter().any(|item| item.is_noun()) }
pub fn has_ending(&mut self) -> bool { self.words.iter().any(|item| item.is_ending()) }
pub fn has_verb(&mut self) -> bool { self.words.iter().any(|item| item.is_verb()) }
pub fn has_and(&mut self) -> bool { self.words.iter().any(|item| item.is_and()) }
pub fn expect_noun(&mut self, he_she_it_override: Option<bool>) {
let mut nouns = indexes!(self.words.iter_mut().enumerate().filter(|&(_, ref word)| word.is_noun())).collect();
let mut sample = self.sample(&mut nouns);
if let Some(new_he_she_it) = he_she_it_override {
if let Word::Noun(ref mut he_she_it, _) = sample {
*he_she_it = new_he_she_it;
}
}
self.completed.push(sample);
if self.rand.gen() && self.has_and() && self.has_noun() {
self.expect_and();
self.expect_noun(Some(false));
}
}
pub fn expect_ending(&mut self) {
let mut endings = indexes!(self.words.iter_mut().enumerate().filter(|&(_, ref word)| word.is_ending())).collect();
let sample = self.sample(&mut endings);
self.completed.push(sample);
}
pub fn expect_verb(&mut self) {
let mut verbs = indexes!(self.words.iter_mut().enumerate().filter(|&(_, ref word)| word.is_verb())).collect();
let verb = self.sample(&mut verbs);
let noun = match verb {
Word::Verb(Verb(noun, _)) => noun,
_ => unreachable!()
};
self.completed.push(verb);
if noun {
if self.has_noun() {
self.expect_noun(None);
} else {
self.completed.push(Word::Unfinished);
}
}
}
pub fn expect_and(&mut self) {
let pos = self.words.iter().position(|word| word.is_and());
self.completed.push(self.words.remove(pos.unwrap()));
}
}
impl<R: Rng> Display for Generator<R> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let mut he_she_it = false;
let mut first = true;
for word in &self.completed {
if word.is_ending() {
write!(f, ",")?;
}
if !first && !word.is_unfinished() {
write!(f, " ")?;
}
first = false;
match *word {
Word::Noun(new_he_she_it, ref noun) => {
he_she_it = new_he_she_it;
write!(f, "{}", noun)
},
Word::Verb(ref verb) => {
write!(f, "{}", verb.gen(he_she_it))
},
Word::Ending(ref ending) => write!(f, "{}", ending),
Word::And => write!(f, "and"),
Word::Unfinished => write!(f, "... eh... uhnn...")
}?;
}
let last = self.completed.last();
if let Some(last) = last {
if !last.is_ending() && !last.is_unfinished() {
write!(f, "!")?;
}
}
Ok(())
}
}