Rust 语法分析：用结构体和枚举分析句子结构

Rust 语法分析：用结构体和枚举分析句子结构

本文将使用 Rust 语言中的结构体和枚举定义句子语法，并通过代码分析句子结构，包括主语、谓语、宾语、修饰词等。

首先，定义一些枚举和结构体，用来表示句子中的不同成分：

enum SentenceType {
    Declarative,
    Interrogative,
    Exclamatory,
    Imperative,
}

struct R<T> {
    range: Range<usize>,
    value: T
}

struct M<T> {
    modifiers: Vec<R<Modifier>>,
    value: T
}

struct Coor<T> {
    conj: Vec<R<Conj>>,
    value: Vec<R<T>>,
}

enum Tense {
    Present,
    Past,
    Future,
    PastFuture,
}

enum Aspect {
    Perfect,
    Imperfect,
    Progressive,
    PerfectProgressive,
}

enum Mood {
    Indicative,
    Subjunctive,
    Imperative,
    Optative,
    Infinitive,
    Participle,
    Gerund,
}


enum Transitivity {
    Intransitive,
    Monotransitive(R<Noun>),
    Ditransitive(R<Noun>, R<Noun>),
}

enum Conj {

}

enum Modifier {
    Clause(Option<R<Conj>>, Clause),
}

enum Complement {
    N(R<Noun>),    ADJ(R<Adjectives>),
}

struct Verb {
    transitivity: Transitivity,
    complement: Vec<R<Complement>>,
    modifiers: Vec<R<Modifier>>,
}

struct Infinitive {
    full: bool,
    verb: R<Verb>,
}

enum NounType {
    Clause(Option<R<Conj>>, Clause),
}

struct Noun {
    appositives: Vec<R<NounType>>,
    adjective: Vec<R<Adjectives>>,
}
type Nouns = Coor<NounType>;

enum AdjectivetType {
    Clause(Option<R<Conj>>, Clause),
}

type Adjectives = Coor<M<AdjectivetType>>;

struct TAM {
    tense: Tense,
    aspect: Aspect,
    mood: Mood,
}

struct Clause {
    tam: TAM,
    verb: R<Verb>,
    subject: Option<R<Nouns>>,
}

type CompoundSentence = Coor<Clause>;

接下来，可以编写代码分析句子 'Mr. Smith, our new teacher, is very kind to us.'：

// 分析句子 'Mr. Smith, our new teacher, is very kind to us.'
let sentence = 'Mr. Smith, our new teacher, is very kind to us.'; 

let compound_sentence = CompoundSentence { 
    conj: vec![],
    value: vec![ 
        Clause { 
            tam: TAM { 
                tense: Tense::Present, 
                aspect: Aspect::Imperfect, 
                mood: Mood::Indicative, 
            }, 
            verb: R { 
                range: 16..18, 
                value: Verb { 
                    transitivity: Transitivity::Intransitive, 
                    complement: vec![R { 
                        range: 19..31, 
                        value: Complement::ADJ(R { 
                            conj: vec![], 
                            value: vec![M { 
                                modifiers: vec![], 
                                value: AdjectivetType::Clause(None, Clause { 
                                    tam: TAM { 
                                        tense: Tense::Present, 
                                        aspect: Aspect::Imperfect, 
                                        mood: Mood::Indicative, 
                                    }, 
                                    verb: R { 
                                        range: 19..22, 
                                        value: Verb { 
                                            transitivity: Transitivity::Intransitive, 
                                            complement: vec![], 
                                            modifiers: vec![], 
                                        }, 
                                    }, 
                                    subject: None, 
                                }), 
                            }, 
                        }, 
                    }], 
                    modifiers: vec![], 
                }, 
            }, 
            subject: Some(R { 
                range: 0..15, 
                value: Nouns { 
                    conj: vec![], 
                    value: vec![R { 
                        range: 0..15, 
                        value: NounType::Clause(None, Clause { 
                            tam: TAM { 
                                tense: Tense::Present, 
                                aspect: Aspect::Imperfect, 
                                mood: Mood::Indicative, 
                            }, 
                            verb: R { 
                                range: 0..15, 
                                value: Verb { 
                                    transitivity: Transitivity::Intransitive, 
                                    complement: vec![], 
                                    modifiers: vec![], 
                                }, 
                            }, 
                            subject: None, 
                        }), 
                    }, 
                }, 
            }), 
        }, 
        Clause { 
            tam: TAM { 
                tense: Tense::Present, 
                aspect: Aspect::Imperfect, 
                mood: Mood::Indicative, 
            }, 
            verb: R { 
                range: 0..15, 
                value: Verb { 
                    transitivity: Transitivity::Intransitive, 
                    complement: vec![], 
                    modifiers: vec![], 
                }, 
            }, 
            subject: None, 
        }, 
    ], 
};

通过代码分析，我们可以得到以下结果：

句子类型：Declarative

子句分析：

1. 子句 1：

   • TAM：Present, Imperfect, Indicative
   • Verb：'is' (Intransitive)
   • Subject：'Mr. Smith, our new teacher'
   • Complement：'very kind to us'

2. 子句 2：

   • TAM：none
   • Verb：none
   • Subject：none
   • Complement：none

名词：

• 'Mr. Smith, our new teacher'
• 'us'

形容词：

• 'new'
• 'very kind'

修饰语：

• None

连接词：

• None

总结：

通过结构体和枚举的定义，我们可以清晰地分析句子的结构，并识别出句子中的不同成分。代码示例展示了如何使用这些结构体和枚举来分析一个简单的句子，并输出结果。

注意：

• 这里只是简单地分析了句子的结构，并未进行更深入的语义分析。
• 该代码示例仅供参考，实际应用中需要根据具体情况进行调整和扩展。