grammar = {
    # 19.7
    NT.MODIFIERS: [
        NT.MODIFIER,
        (NT.MODIFIERS, NT.MODIFIER),
    ],
    NT.MODIFIER: [
        T.PUBLIC,
        T.PROTECTED,
        T.STATIC,
        T.ABSTRACT,
        T.FINAL,
        T.NATIVE,
    ],

    # 19.8.1
    NT.CLASS_DECLARATION: (OPT(NT.MODIFIERS), T.CLASS, T.IDENTIFIER, OPT(NT.SUPER), OPT(NT.INTERFACES), NT.CLASS_BODY),
    NT.SUPER: (T.EXTENDS, NT.CLASS_TYPE),
    NT.INTERFACES: (T.IMPLEMENTS, NT.INTERFACE_TYPE_LIST),
    NT.INTERFACE_TYPE_LIST: [
        NT.INTERFACE_TYPE,
        (NT.INTERFACE_TYPE_LIST, NT.INTERFACE_TYPE)
    ],
    NT.CLASS_BODY: (T.LBRACE, OPT(NT.CLASS_BODY_DECLARATIONS), T.RBRACE),
    NT.CLASS_BODY_DECLARATIONS: [
        NT.CLASS_BODY_DECLARATION,
        (NT.CLASS_BODY_DECLARATIONS, NT.CLASS_BODY_DECLARATION)
    ],
    NT.CLASS_BODY_DECLARATION: [
        NT.CLASS_MEMBER_DECLARATION,
        NT.STATIC_INITIALIZER,
        NT.CONSTRUCTOR_DECLARATION
    ],
    NT.CLASS_MEMBER_DECLARATION: [
        NT.FIELD_DECLARATION,
        NT.METHOD_DECLARATION,
    ],

    # 19.8.2
    NT.FIELD_DECLARATION: (OPT(NT.MODIFIERS), NT.TYPE, NT.VARIABLE_DECLARATORS),
    NT.VARIABLE_DECLARATORS: [
        NT.VARIABLE_DECLARATOR,
        (NT.VARIABLE_DECLARATORS, T.COMMA, NT.VARIABLE_DECLARATOR)
    ],
    NT.VARIABLE_DECLARATOR: [
        NT.VARIABLE_DECLARATOR_ID,
        (NT.VARIABLE_DECLARATOR_ID, T.EQUALS, NT.VARIABLE_INITIALIZER)
    ],
    NT.VARIABLE_DECLARATOR_ID: [
        T.IDENTIFIER,
        (NT.VARIABLE_DECLARATOR_ID, T.LBRACK, T.RBRACK)
    ],
    NT.VARIABLE_INITIALIZER: [
        NT.EXPRESSION,
        NT.ARRAY_INITIALIZER
    ]
}