mathic 0.2.0

A compiler with builtin support of symbolic operations, built with LLVM/MLIR
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

use crate::parser::{
    MathicParser, ParserResult,
    ast::control_flow::{ForStmt, IfStmt, WhileStmt},
    token::Token,
};

impl<'a> MathicParser<'a> {
    pub fn parse_if_stmt(&self) -> ParserResult<IfStmt> {
        self.next()?; // consume If.

        let condition = self.parse_expr_no_init()?;

        let then_block = self.parse_block()?;

        let else_block = if self.check_next(Token::Else)? {
            self.consume_token(Token::Else)?;
            Some(self.parse_block()?)
        } else {
            None
        };

        Ok(IfStmt {
            condition,
            then_block,
            else_block,
        })
    }

    pub fn parse_while_stmt(&self) -> ParserResult<WhileStmt> {
        self.next()?; // consume While.

        let condition = self.parse_expr_no_init()?;

        let body = self.parse_block()?;

        Ok(WhileStmt { condition, body })
    }

    pub fn parse_for_stmt(&self) -> ParserResult<ForStmt> {
        self.next()?; // consume For.

        let variable = self.consume_token(Token::Ident)?.lexeme.to_string();

        self.consume_token(Token::In)?;

        let start = self.parse_expr_no_init()?;

        self.consume_token(Token::Dot)?;
        self.consume_token(Token::Dot)?;

        let end = self.parse_expr_no_init()?;

        let body = self.parse_block()?;

        Ok(ForStmt {
            variable,
            start,
            end,
            body,
        })
    }
}