nyavascript 0.1.0

Lisp implementation. Called NyavaScript because I'm a monster
Documentation 
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

mod lexical_analysis;
pub use lexical_analysis::parse as lex_parse;
pub use lexical_analysis::{ Token, LexError };

mod semantic_analysis;
pub use semantic_analysis::parse as sem_parse;
pub use semantic_analysis::SemanticError;

mod syntactic_analysis;
pub use syntactic_analysis::parse as syn_parse;
pub use syntactic_analysis::{ Syntax, SyntaxError };

#[cfg(test)]
mod test;

use crate::s_expression::SExpressionRef;
use std::error::Error;
use std::convert::From;

pub fn parse(text: &str) -> Result<SExpressionRef, ParseError> {
    let tokens = lexical_analysis::parse(text)?;
    let syntax = syntactic_analysis::parse(tokens)?;
    let ret = semantic_analysis::parse(syntax)?;

    Ok(ret)
}

#[derive(Debug)]
pub enum ParseError {
    Lex(LexError),
    Semantic(SemanticError),
    Syntax(SyntaxError),
}

impl std::fmt::Display for ParseError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            Self::Lex(err) => write!(f, "{}", err),
            Self::Syntax(err) => write!(f, "{}", err),
            Self::Semantic(err) => write!(f, "{}", err),
        }
    }
}

impl From<LexError> for ParseError {
    fn from(err: LexError) -> Self {
        Self::Lex(err)
    }
}

impl From<SyntaxError> for ParseError {
    fn from(err: SyntaxError) -> Self {
        Self::Syntax(err)
    }
}

impl From<SemanticError> for ParseError {
    fn from(err: SemanticError) -> Self {
        Self::Semantic(err)
    }
}

impl Error for ParseError { }