Method expect

expr/parse.go:228–234

expect verifies the current token and guarantees it has the required type

(expected lex.TokenType, context string)

// expect verifies the current token and guarantees it has the required type
func (t *tree) expect(expected lex.TokenType, context string) lex.Token {
	token := t.Cur()
	if token.T != expected {
		t.unexpected(token, context)
	}
	return token
}

// expectOneOf consumes the next token and guarantees it has one of the required types.
func (t *tree) expectOneOf(expected1, expected2 lex.TokenType, context string) lex.Token {