/**
* The string stream contains the value '0b' or '0B'.
* @returns BINARY_NUMERAL |
* BINARY_NUMERAL_WITH_INT_TYPE_SUFFIX |
* ERROR.
*/
LiteralToken LiteralSupport::getBinaryNumeral(u32string &ss) {
// Lookahead and confirm that we have valid binary digit.
char32_t c = src->getChar();
if (!isBinaryDigit(c)) {
src->ungetChar(3);
return LiteralToken::ERROR;
}
// Append bin digit we've just consumed
ss += c;
// Consume remaining digits
consumeDigitsPOrUnderscores(ss, isBinaryDigit);
// Check int type suffix
char peek = src->peekChar();
if (isIntegerTypeSuffix(peek)) {
ss += src->getChar(); // append and consume suffix
return LiteralToken::BINARY_NUMERAL_WITH_INT_TYPE_SUFFIX;
}
return LiteralToken::BINARY_NUMERAL;
}
Token Scanner::readNumber()
{
if (!m_src.isEnd()) {
QChar ch = m_src.peek();
if (ch.toLower() == 'b') {
m_src.move();
while (isBinaryDigit(m_src.peek()))
m_src.move();
} else if (ch.toLower() == 'o') {
m_src.move();
while (isOctalDigit(m_src.peek()))
m_src.move();
} else if (ch.toLower() == 'x') {
m_src.move();
while (isHexDigit(m_src.peek()))
m_src.move();
} else { // either integer or float number
return readFloatNumber();
}
if (isValidIntegerSuffix(m_src.peek()))
m_src.move();
}
return Token(Token::Number, m_src.anchor(), m_src.length());
}
