token

const (
	Illegal Type = "ILLEGAL"
	EOF     Type = "EOF"

	// Literals
	Ident  Type = "IDENT"
	Int    Type = "INT"
	Float  Type = "FLOAT"
	String Type = "STRING"
	// InterpString is a backtick-quoted string subject to `{expr}`
	// interpolation. Kept distinct from String so plain `"..."`/`'...'`
	// strings containing `{` are not mis-parsed as interpolated.
	InterpString Type = "INTERP_STRING"

	// Arithmetic
	Plus     Type = "+"
	Minus    Type = "-"
	Asterisk Type = "*"
	Slash    Type = "/"
	Percent  Type = "%"
	Caret    Type = "^"
	FloorDiv Type = "//"

	// Unary-only operators.
	// `Hash` is length-of (`#t`). `Not` is logical not. `Tilde` is also a
	// unary operator (bitwise not) but lives in the bitwise section because
	// it doubles as binary XOR.
	Hash Type = "#"

	// Compound assignment.
	// `BorAssign` and `BandAssign` are *bitwise* OR/AND assign (`|=`, `&=`),
	// not logical — Lua's logical `or`/`and` have no compound form.
	PlusAssign   Type = "+="
	MinusAssign  Type = "-="
	MulAssign    Type = "*="
	DivAssign    Type = "/="
	BorAssign    Type = "|="
	BandAssign   Type = "&="
	LShiftAssign Type = "<<="
	RShiftAssign Type = ">>="

	// Bitwise
	Ampersand Type = "&"
	Pipe      Type = "|"
	Tilde     Type = "~"
	LShift    Type = "<<"
	RShift    Type = ">>"

	// Comparison
	Eq    Type = "=="
	NotEq Type = "~="
	LT    Type = "<"
	LTE   Type = "<="
	GT    Type = ">"
	GTE   Type = ">="

	// Assignment
	Assign Type = "="

	// Type-syntax operators (Luau-style annotations).
	// `Question` is the postfix-optional sugar (`T?` ≡ `T | nil`).
	// `Arrow` separates a function type's params from its return (`(A) -> B`)
	// and also acts as the arm separator in `match` expressions; the parser
	// disambiguates by context.
	// `::` is represented by Label and is reused for type assertions
	// (`expr :: T`); again the parser disambiguates by context.
	Question Type = "?"
	Arrow    Type = "->"

	// Logical (keywords in Lua, but typed for AST use)
	And Type = "AND"
	Or  Type = "OR"
	Not Type = "NOT"

	// Delimiters
	Comma     Type = ","
	Semicolon Type = ";"
	Colon     Type = ":"
	Dot       Type = "."
	Concat    Type = ".."
	Vararg    Type = "..."
	Label     Type = "::"

	LParen   Type = "("
	RParen   Type = ")"
	LBrace   Type = "{"
	RBrace   Type = "}"
	LBracket Type = "["
	RBracket Type = "]"

	// Keywords
	True     Type = "TRUE"
	False    Type = "FALSE"
	Nil      Type = "NIL"
	If       Type = "IF"
	ElseIf   Type = "ELSEIF"
	Else     Type = "ELSE"
	Then     Type = "THEN"
	End      Type = "END"
	Do       Type = "DO"
	While    Type = "WHILE"
	Repeat   Type = "REPEAT"
	Until    Type = "UNTIL"
	For      Type = "FOR"
	In       Type = "IN"
	Function Type = "FUNCTION"
	Local    Type = "LOCAL"
	Return   Type = "RETURN"
	Break    Type = "BREAK"
	Goto     Type = "GOTO"
	Match    Type = "MATCH"
	Enum     Type = "ENUM"
	Defer    Type = "DEFER"
	Try      Type = "TRY"
	Catch    Type = "CATCH"
	Throw    Type = "THROW"
)