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use derive_more::Display;
/// An operator used in the intermediate representation
#[derive(Debug, Clone, Copy, PartialEq, Eq, Display)]
#[display(rename_all = "lowercase")]
pub enum Operator {
// Arithmetic
/// Add (+) operator
Add,
/// Sub (-) operator
Sub,
/// Mul (*) operator
Mul,
/// Div (/) operator
Div,
/// Rem (%) operator
Rem,
// Arithmetic Assign
/// Add assign (+=) operator
AddAssign,
/// Sub assign (-=) operator
SubAssign,
/// Mul assign (*=) operator
MulAssign,
/// Div assign (/=) operator
DivAssign,
/// Rem assign (%=) operator
RemAssign,
// Comparison
/// Equals (==) operator
Eq,
/// Not equal (!=) operator
Ne,
/// Less than (<) operator
Lt,
/// Less than equals (<=) operator
Le,
/// Greater than equal (>=) operator
Ge,
/// Greater than (>) operator
Gt,
// Boolean
/// And (&&) operator
And,
/// Or (||) operator
Or,
/// Bitwise XOR (^) operator
BitXor,
/// Bitwise And (&) operator
BitAnd,
/// Bitwise Or (|) operator
BitOr,
// Boolean assign
/// Bitwise xor assign (^=) operator
BitXorAssign,
/// Bitwise and assign (&=) operator
BitAndAssign,
/// Bitwise or assign (|=) operator
BitOrAssign,
/// Shift left (<<) operator
Shl,
/// Shift right (>>) operator
Shr,
/// Shift left assign (<<=) operator
ShlAssign,
/// Shift right assign (>>= operator)
ShrAssign,
// Unary
/// Dereference operator (*)
Deref,
/// Not operator (!)
Not,
/// Negation unary operator (-)
Neg,
// Extra
#[display("as_deref")]
AsDeref,
#[display("as_deref_mut")]
AsDerefMut,
}
impl Operator {
/// Whether this is an assign op, aka whether the output is the same as the
/// left hand side
pub fn is_assign(&self) -> bool {
matches!(
self,
Operator::AddAssign
| Operator::SubAssign
| Operator::MulAssign
| Operator::DivAssign
| Operator::RemAssign
| Operator::BitXorAssign
| Operator::BitAndAssign
| Operator::BitOrAssign
| Operator::ShlAssign
| Operator::ShrAssign
)
}
/// Whether this is a comparison op, which insert a hidden reference
pub fn is_cmp(&self) -> bool {
matches!(
self,
Operator::Eq | Operator::Ne | Operator::Lt | Operator::Le | Operator::Gt | Operator::Ge
)
}
/// Get the expanded op name for this operation
pub fn op_name(&self) -> String {
if self.is_assign() {
let name = self.to_string();
format!("{}_assign", &name[..name.len() - 6])
} else {
self.to_string()
}
}
}