schala/schala-lang/src/ast/operators.rs

use std::rc::Rc;

#[derive(Debug, PartialEq, Clone)]
pub struct PrefixOp {
    sigil: Rc<String>,
}

impl PrefixOp {
    pub fn from_sigil(sigil: &str) -> PrefixOp {
        PrefixOp { sigil: Rc::new(sigil.to_string()) }
    }

    pub fn sigil(&self) -> &str {
        &self.sigil
    }
}

#[derive(Debug, PartialEq, Clone)]
pub struct BinOp {
    sigil: Rc<String>,
}

impl BinOp {
    pub fn from_sigil(sigil: &str) -> BinOp {
        BinOp { sigil: Rc::new(sigil.to_string()) }
    }

    pub fn sigil(&self) -> &str {
        &self.sigil
    }

    pub fn min_precedence() -> i32 {
        i32::min_value()
    }
    pub fn get_precedence(&self) -> i32 {
        binop_precedences(self.sigil.as_ref())
    }
}

fn binop_precedences(s: &str) -> i32 {
    let default = 10_000_000;
    match s {
        "+" => 10,
        "-" => 10,
        "*" => 20,
        "/" => 20,
        "%" => 20,
        "++" => 30,
        "^" => 30,
        "&" => 20,
        "|" => 20,
        ">" => 20,
        ">=" => 20,
        "<" => 20,
        "<=" => 20,
        "==" => 40,
        "<=>" => 30,
        "=" => 5, // Assignment shoudl have highest precedence
        _ => default,
    }
}