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#[derive(Clone, Copy)]
pub enum Operator {
Equal,
NotEqual,
LessThan,
GreaterThan,
LessThanEqual,
GreaterThanEqual,
Add,
Subtract,
Multiply,
Divide,
Modulo,
Exponent,
LeftShift,
RightShift,
BitAnd,
BitOr,
BitXor,
BitNot,
Length,
}
impl Operator {
pub fn from_str(string: &str) -> Option<Self> {
match string {
"=" => Some(Operator::Equal),
"==" => Some(Operator::Equal),
"<eq>" => Some(Operator::Equal),
"!=" => Some(Operator::NotEqual),
"<neq>" => Some(Operator::NotEqual),
"<" => Some(Operator::LessThan),
"<lth>" => Some(Operator::LessThan),
">" => Some(Operator::GreaterThan),
"<gth>" => Some(Operator::GreaterThan),
"<=" => Some(Operator::LessThanEqual),
"<leq>" => Some(Operator::LessThanEqual),
">=" => Some(Operator::GreaterThanEqual),
"<geq>" => Some(Operator::GreaterThanEqual),
"+" => Some(Operator::Add),
"<add>" => Some(Operator::Add),
"-" => Some(Operator::Subtract),
"<sub>" => Some(Operator::Subtract),
"*" => Some(Operator::Multiply),
"<mul>" => Some(Operator::Multiply),
"/" => Some(Operator::Divide),
"<div>" => Some(Operator::Divide),
"<mod>" => Some(Operator::Modulo),
"**" => Some(Operator::Exponent),
"<exp>" => Some(Operator::Exponent),
"<<" => Some(Operator::LeftShift),
"<shl>" => Some(Operator::LeftShift),
">>" => Some(Operator::RightShift),
"<shr>" => Some(Operator::RightShift),
"<and>" => Some(Operator::BitAnd),
"<or>" => Some(Operator::BitOr),
"<xor>" => Some(Operator::BitXor),
"<not>" => Some(Operator::BitNot),
"<len>" => Some(Operator::Length),
_ => None,
}
}
}
impl std::fmt::Display for Operator {
fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(), std::fmt::Error> {
let string = match self {
Operator::Equal => "<eq>",
Operator::NotEqual => "<neq>",
Operator::LessThan => "<lth>",
Operator::GreaterThan => "<gth>",
Operator::LessThanEqual => "<leq>",
Operator::GreaterThanEqual => "<geq>",
Operator::Add => "<add>",
Operator::Subtract => "<sub>",
Operator::Multiply => "<mul>",
Operator::Divide => "<div>",
Operator::Modulo => "<mod>",
Operator::Exponent => "<exp>",
Operator::LeftShift => "<shl>",
Operator::RightShift => "<shr>",
Operator::BitAnd => "<and>",
Operator::BitOr => "<or>",
Operator::BitXor => "<xor>",
Operator::BitNot => "<not>",
Operator::Length => "<len>",
};
write!(f, "{string}")
}
}
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