class State:
    OPERATOR, NAME, *_ = range(100)


class TokenType:
    (
        LEFT_PARENTHESIS, RIGHT_PARENTHESIS,
        LEFT_BRACE, RIGHT_BRACE,
        NUMBER, OPERATOR, SYMBOL, KEYWORD, UNARY,
        SEMICOLON, COMMA, EQUALS, *_
    ) = range(100)


class NodeType:
    (
        NUMBER, OPERATOR, SYMBOL, FUNCALL, ARGUMENTS, UNARY, ASSIGNMENT, *_
    ) = range(100)


class Keyword:
    LET, STRUCT, FN, RETURN, IF, ELSE, FOR, WHILE, CONTINUE, BREAK, *_ = range(100)


keywords = {
    "let": Keyword.LET, "struct": Keyword.STRUCT,
    "fn": Keyword.FN, "return": Keyword.RETURN,
    "if": Keyword.IF, "else": Keyword.ELSE,
    "for": Keyword.FOR, "while": Keyword.WHILE, "continue": Keyword.CONTINUE, "break": Keyword.BREAK,
}

keywords_repr = {keywords[i]: i for i in keywords}

types = [
    "i8", "i16", "i32", "i64",
    "f32", "f64",
]

PRECEDENCE = {
    "+": 10,
    "-": 10,
    "*": 20,
    "^": 30,
    NodeType.UNARY: 40,
}

OPERATOR_CHARS = "*+-/%&~^|#$.:<=>@"
NUMBER_CHARS = "0123456789"
SYMBOL_CHARS = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!?"