token

const (
	ILLEGAL = "ILLEGAL"
	EOF     = "EOF"

	// Identifiers + literals
	IDENT  = "IDENT"  // add, foobar, x, y, ...
	INT    = "INT"    // 1343456
	STRING = "STRING" // "hello world"

	// Operators
	ASSIGN   = "="
	PLUS     = "+"
	MINUS    = "-"
	BANG     = "!"
	ASTERISK = "*"
	SLASH    = "/"
	INC      = "++"
	DEC      = "--"

	GT       = ">"
	LT       = "<"
	GTGT     = ">>"
	LTLT     = "<<"
	GTAMP    = ">&"
	LTAMP    = "<&"
	EQ       = "=="
	NotEq    = "!="
	EQTILDE  = "=~"
	QUESTION = "?"

	// Delimiters
	COMMA        = ","
	SEMICOLON    = ";"
	COLON        = ":"
	LPAREN       = "("
	RPAREN       = ")"
	LBRACE       = "{"
	RBRACE       = "}"
	LBRACKET     = "["
	RBRACKET     = "]"
	LDBRACKET    = "[["
	RDBRACKET    = "]]"
	DoubleLparen = "(("
	DoubleRparen = "))"

	// Keywords
	FUNCTION = "FUNCTION"
	LET      = "LET"
	TRUE     = "TRUE"
	FALSE    = "FALSE"
	If       = "IF"
	ELSE     = "ELSE"
	RETURN   = "RETURN"
	THEN     = "THEN"
	Fi       = "FI"
	FOR      = "FOR"
	WHILE    = "WHILE"
	DO       = "DO"
	DONE     = "DONE"
	IN       = "IN"
	CASE     = "CASE"
	ESAC     = "ESAC"
	ELIF     = "ELIF"

	// Zsh-specific tokens
	DOLLAR        = "$"
	DollarLbrace  = "${"
	DOLLAR_LPAREN = "$("
	VARIABLE      = "VARIABLE"
	HASH          = "#"
	AMPERSAND     = "&"
	PIPE          = "|"
	BACKTICK      = "`"
	TILDE         = "~"
	CARET         = "^"
	PERCENT       = "%"
	DOT           = "."
	SHEBANG       = "#!"

	// Zsh-specific operators
	AND   = "&&"
	OR    = "||"
	DSEMI = ";;"

	// Zsh-specific delimiters
	LARRAY = "("
	RARRAY = ")"
)