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|
//! Defines a bunch of data-less enums for unary and binary operators.
//!
//! Types here don't know about AST, this allows re-using them for both AST and
//! HIR.
use std::fmt;
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum RangeOp {
/// `..`
Exclusive,
/// `..=`
Inclusive,
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum UnaryOp {
/// `*`
Deref,
/// `!`
Not,
/// `-`
Neg,
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum BinaryOp {
LogicOp(LogicOp),
ArithOp(ArithOp),
CmpOp(CmpOp),
Assignment { op: Option<ArithOp> },
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum LogicOp {
And,
Or,
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum CmpOp {
Eq { negated: bool },
Ord { ordering: Ordering, strict: bool },
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum Ordering {
Less,
Greater,
}
#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
pub enum ArithOp {
Add,
Mul,
Sub,
Div,
Rem,
Shl,
Shr,
BitXor,
BitOr,
BitAnd,
}
impl fmt::Display for LogicOp {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let res = match self {
LogicOp::And => "&&",
LogicOp::Or => "||",
};
f.write_str(res)
}
}
impl fmt::Display for ArithOp {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let res = match self {
ArithOp::Add => "+",
ArithOp::Mul => "*",
ArithOp::Sub => "-",
ArithOp::Div => "/",
ArithOp::Rem => "%",
ArithOp::Shl => "<<",
ArithOp::Shr => ">>",
ArithOp::BitXor => "^",
ArithOp::BitOr => "|",
ArithOp::BitAnd => "&",
};
f.write_str(res)
}
}
impl fmt::Display for CmpOp {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let res = match self {
CmpOp::Eq { negated: false } => "==",
CmpOp::Eq { negated: true } => "!=",
CmpOp::Ord { ordering: Ordering::Less, strict: false } => "<=",
CmpOp::Ord { ordering: Ordering::Less, strict: true } => "<",
CmpOp::Ord { ordering: Ordering::Greater, strict: false } => ">=",
CmpOp::Ord { ordering: Ordering::Greater, strict: true } => ">",
};
f.write_str(res)
}
}
impl fmt::Display for BinaryOp {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self {
BinaryOp::LogicOp(op) => fmt::Display::fmt(op, f),
BinaryOp::ArithOp(op) => fmt::Display::fmt(op, f),
BinaryOp::CmpOp(op) => fmt::Display::fmt(op, f),
BinaryOp::Assignment { op } => {
f.write_str("=")?;
if let Some(op) = op {
fmt::Display::fmt(op, f)?;
}
Ok(())
}
}
}
}
|
