english_core/
verb.rs

1use crate::EnglishCore;
2use crate::grammar::*;
3impl EnglishCore {
4    pub fn verb(
5        word: &str,
6        person: &Person,
7        number: &Number,
8        tense: &Tense,
9        form: &Form,
10    ) -> String {
11        match word {
12            "be" => {
13                return EnglishCore::to_be(person, number, tense, form).to_string();
14            }
15            _ => (),
16        }
17        match (person, number, tense, form) {
18            (_, _, _, Form::Infinitive) => {
19                return word.to_string();
20            }
21
22            (Person::Third, Number::Singular, Tense::Present, Form::Finite) => {
23                if let Some(irr) = EnglishCore::iter_replace_last(word, IRREGULAR_THIRD) {
24                    return irr;
25                }
26                format!("{}{}", word, "s")
27            }
28            (_, _, Tense::Present, Form::Finite) => {
29                return word.to_string();
30            }
31            (_, _, Tense::Present, Form::Participle) => {
32                if let Some(irr) = EnglishCore::iter_replace_last(word, IRREGULAR_PRES_PART) {
33                    return irr;
34                }
35                format!("{}{}", word, "ing")
36            }
37
38            (_, _, Tense::Past, _) => {
39                if let Some(irr) = EnglishCore::iter_replace_last(word, IRREGULAR_PAST) {
40                    return irr;
41                }
42                format!("{}{}", word, "ed")
43            }
44        }
45    }
46    pub fn to_be(person: &Person, number: &Number, tense: &Tense, form: &Form) -> &'static str {
47        match (tense, form) {
48            (_, Form::Infinitive) => "be",
49            (Tense::Present, Form::Finite) => match number {
50                Number::Singular => match person {
51                    Person::First => "am",
52                    Person::Second => "are",
53                    Person::Third => "is",
54                },
55                Number::Plural => "are",
56            },
57            (Tense::Past, Form::Finite) => match number {
58                Number::Singular => match person {
59                    Person::First => "was",
60                    Person::Second => "were",
61                    Person::Third => "was",
62                },
63                Number::Plural => "were",
64            },
65            (Tense::Past, Form::Participle) => "been",
66            (Tense::Present, Form::Participle) => "being",
67        }
68    }
69}
70
71static IRREGULAR_PRES_PART: &[(&str, &str)] = &[
72    ("e", "ing"),
73    ("p", "pping"),
74    ("ng", "nging"),
75    ("g", "gging"),
76    //  ("b", "bbing"),
77    //   ("d", "dding"),
78    //  ("t", "tting"),
79];
80
81static IRREGULAR_PAST: &[(&str, &str)] = &[
82    ("fight", "fought"),
83    ("buy", "bought"),
84    ("e", "ed"),
85    ("p", "pped"),
86    ("y", "ied"),
87    ("ng", "nged"),
88    ("g", "gged"),
89    // ("b", "bbed"),
90    //("d", "dded"),
91    //  ("t", "tted"),
92];
93
94static IRREGULAR_THIRD: &[(&str, &str)] = &[
95    ("sh", "shes"),
96    ("ch", "ches"),
97    ("s", "ses"),
98    ("z", "zes"),
99    ("x", "xes"),
100    ("buy", "buys"),
101    ("y", "ies"),
102];
english_core/verb.rs

english_core/
verb.rs
