syntax/atom.rs

use crate::syntax::Type;
use proc_macro2::Ident;

#[derive(Copy, Clone, PartialEq)]
pub enum Atom {
    Bool,
    U8,
    U16,
    U32,
    U64,
    Usize,
    I8,
    I16,
    I32,
    I64,
    Isize,
    CxxString,
    RustString,
}

impl Atom {
    pub fn from(ident: &Ident) -> Option<Self> {
        use self::Atom::*;
        match ident.to_string().as_str() {
            "bool" => Some(Bool),
            "u8" => Some(U8),
            "u16" => Some(U16),
            "u32" => Some(U32),
            "u64" => Some(U64),
            "usize" => Some(Usize),
            "i8" => Some(I8),
            "i16" => Some(I16),
            "i32" => Some(I32),
            "i64" => Some(I64),
            "isize" => Some(Isize),
            "CxxString" => Some(CxxString),
            "String" => Some(RustString),
            _ => None,
        }
    }
}

impl PartialEq<Atom> for Ident {
    fn eq(&self, atom: &Atom) -> bool {
        Atom::from(self) == Some(*atom)
    }
}

impl PartialEq<Atom> for Type {
    fn eq(&self, atom: &Atom) -> bool {
        match self {
            Type::Ident(ident) => ident == atom,
            _ => false,
        }
    }
}

impl PartialEq<Atom> for &Ident {
    fn eq(&self, atom: &Atom) -> bool {
        *self == atom
    }
}

impl PartialEq<Atom> for &Type {
    fn eq(&self, atom: &Atom) -> bool {
        *self == atom
    }
}