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use crate::lexer::Token;
use crate::lexer::Token::*;
#[derive(Debug, PartialEq, Clone, Copy)]
pub enum OperatorKind {
FatArrow, // … => …
New, // new …
Increment, // ++ … | … ++
Decrement, // -- … | … --
LogicalNot, // ! …
BitwiseNot, // ~ …
Typeof, // typeof …
Void, // void …
Delete, // delete …
Multiplication, // … * …
Division, // … / …
Remainder, // … % …
Exponent, // … ** …
Addition, // … + … | + …
Subtraction, // … - … | - …
BitShiftLeft, // … << …
BitShiftRight, // … >> …
UBitShiftRight, // … >>> …
Lesser, // … < …
LesserEquals, // … <= …
Greater, // … > …
GreaterEquals, // … >= …
Instanceof, // … instanceof …
In, // … in …
StrictEquality, // … === …
StrictInequality, // … !== …
Equality, // … == …
Inequality, // … != …
BitwiseAnd, // … & …
BitwiseXor, // … ^ …
BitwiseOr, // … | …
LogicalAnd, // … && …
LogicalOr, // … || …
Conditional, // … ? … : …
Assign, // … = …
AddAssign, // … += …
SubtractAssign, // … -= …
ExponentAssign, // … **= …
MultiplyAssign, // … *= …
DivideAssign, // … /= …
RemainderAssign, // … %= …
BSLAssign, // … <<= …
BSRAssign, // … >>= …
UBSRAssign, // … >>>= …
BitAndAssign, // … &= …
BitXorAssign, // … ^= …
BitOrAssign, // … |= …
Spread, // ... …
}
#[derive(Debug, PartialEq, Clone)]
pub enum OperatorCategory {
Minus,
Plus,
Safe,
Word,
}
use self::OperatorKind::*;
impl OperatorKind {
#[inline]
pub fn from_token(token: Token) -> Option<OperatorKind> {
match token {
OperatorFatArrow => Some(FatArrow),
OperatorNew => Some(New),
OperatorIncrement => Some(Increment),
OperatorDecrement => Some(Decrement),
OperatorLogicalNot => Some(LogicalNot),
OperatorBitwiseNot => Some(BitwiseNot),
OperatorTypeof => Some(Typeof),
OperatorVoid => Some(Void),
OperatorDelete => Some(Delete),
OperatorMultiplication => Some(Multiplication),
OperatorDivision => Some(Division),
OperatorRemainder => Some(Remainder),
OperatorExponent => Some(Exponent),
OperatorAddition => Some(Addition),
OperatorSubtraction => Some(Subtraction),
OperatorBitShiftLeft => Some(BitShiftLeft),
OperatorBitShiftRight => Some(BitShiftRight),
OperatorUBitShiftRight => Some(UBitShiftRight),
OperatorLesser => Some(Lesser),
OperatorLesserEquals => Some(LesserEquals),
OperatorGreater => Some(Greater),
OperatorGreaterEquals => Some(GreaterEquals),
OperatorInstanceof => Some(Instanceof),
OperatorIn => Some(In),
OperatorStrictEquality => Some(StrictEquality),
OperatorStrictInequality => Some(StrictInequality),
OperatorEquality => Some(Equality),
OperatorInequality => Some(Inequality),
OperatorBitwiseAnd => Some(BitwiseAnd),
OperatorBitwiseXor => Some(BitwiseXor),
OperatorBitwiseOr => Some(BitwiseOr),
OperatorLogicalAnd => Some(LogicalAnd),
OperatorLogicalOr => Some(LogicalOr),
OperatorConditional => Some(Conditional),
OperatorAssign => Some(Assign),
OperatorAddAssign => Some(AddAssign),
OperatorSubtractAssign => Some(SubtractAssign),
OperatorExponentAssign => Some(ExponentAssign),
OperatorMultiplyAssign => Some(MultiplyAssign),
OperatorDivideAssign => Some(DivideAssign),
OperatorRemainderAssign => Some(RemainderAssign),
OperatorBSLAssign => Some(BSLAssign),
OperatorBSRAssign => Some(BSRAssign),
OperatorUBSRAssign => Some(UBSRAssign),
OperatorBitAndAssign => Some(BitAndAssign),
OperatorBitXorAssign => Some(BitXorAssign),
OperatorBitOrAssign => Some(BitOrAssign),
OperatorSpread => Some(Spread),
_ => None
}
}
#[inline]
pub fn as_str(&self) -> &'static str {
match self {
FatArrow => "=>",
New => "new",
Increment => "++",
Decrement => "--",
LogicalNot => "!",
BitwiseNot => "~",
Typeof => "typeof",
Void => "void",
Delete => "delete",
Multiplication => "*",
Division => "/",
Remainder => "%",
Exponent => "**",
Addition => "+",
Subtraction => "-",
BitShiftLeft => "<<",
BitShiftRight => ">>",
UBitShiftRight => ">>>",
Lesser => "<",
LesserEquals => "<=",
Greater => ">",
GreaterEquals => ">=",
Instanceof => "instanceof",
In => "in",
StrictEquality => "===",
StrictInequality => "!==",
Equality => "==",
Inequality => "!=",
BitwiseAnd => "&",
BitwiseXor => "^",
BitwiseOr => "|",
LogicalAnd => "&&",
LogicalOr => "||",
Conditional => "?",
Assign => "=",
AddAssign => "+=",
SubtractAssign => "-=",
ExponentAssign => "**=",
MultiplyAssign => "*=",
DivideAssign => "/=",
RemainderAssign => "%=",
BSLAssign => "<<=",
BSRAssign => ">>=",
UBSRAssign => ">>>=",
BitAndAssign => "&=",
BitXorAssign => "^=",
BitOrAssign => "|=",
Spread => "...",
}
}
/// According to the Operator Precedence Table
/// Note: Unary operators default to 15!
#[inline]
pub fn binding_power(&self) -> u8 {
match self {
FatArrow => 18,
New => 17,
Increment |
Decrement => 16,
LogicalNot |
BitwiseNot |
Typeof |
Void |
Delete => 15,
Multiplication |
Division |
Remainder |
Exponent => 14,
Addition |
Subtraction => 13,
BitShiftLeft |
BitShiftRight |
UBitShiftRight => 12,
Lesser |
LesserEquals |
Greater |
GreaterEquals |
Instanceof |
In => 11,
StrictEquality |
StrictInequality |
Equality |
Inequality => 10,
BitwiseAnd => 9,
BitwiseXor => 8,
BitwiseOr => 7,
LogicalAnd => 6,
LogicalOr => 5,
Conditional => 4,
Assign |
AddAssign |
SubtractAssign |
ExponentAssign |
MultiplyAssign |
DivideAssign |
RemainderAssign |
BSLAssign |
BSRAssign |
UBSRAssign |
BitAndAssign |
BitXorAssign |
BitOrAssign => 3,
Spread => 1,
}
}
#[inline]
pub fn prefix(&self) -> bool {
match self {
LogicalNot |
BitwiseNot |
Typeof |
Void |
Delete |
New |
Spread |
Increment |
Decrement |
Addition |
Subtraction => true,
_ => false
}
}
#[inline]
pub fn infix(&self) -> bool {
match self {
FatArrow |
Multiplication |
Division |
Remainder |
Exponent |
StrictEquality |
StrictInequality |
Equality |
Inequality |
Lesser |
LesserEquals |
Greater |
GreaterEquals |
Instanceof |
In |
BitShiftLeft |
BitShiftRight |
UBitShiftRight |
BitwiseAnd |
BitwiseXor |
BitwiseOr |
LogicalAnd |
LogicalOr |
Conditional |
Addition |
Subtraction |
Assign |
AddAssign |
SubtractAssign |
ExponentAssign |
MultiplyAssign |
DivideAssign |
RemainderAssign |
BSLAssign |
BSRAssign |
UBSRAssign |
BitAndAssign |
BitXorAssign |
BitOrAssign => true,
_ => false
}
}
#[inline]
pub fn assignment(&self) -> bool {
match self {
Assign |
AddAssign |
SubtractAssign |
ExponentAssign |
MultiplyAssign |
DivideAssign |
RemainderAssign |
BSLAssign |
BSRAssign |
UBSRAssign |
BitAndAssign |
BitXorAssign |
BitOrAssign => true,
_ => false
}
}
#[inline]
pub fn category(&self) -> OperatorCategory {
match self {
In |
New |
Typeof |
Void |
Delete |
Instanceof => OperatorCategory::Word,
Addition |
Increment => OperatorCategory::Plus,
Subtraction |
Decrement => OperatorCategory::Minus,
_ => OperatorCategory::Safe,
}
}
}