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Allow underscores in numbers.

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This commit is contained in:
Balajiganapathi S
2018-08-08 12:05:51 +02:00
committed by Christian Parpart
parent 4dc3335cda
commit 0000bfc604
5 changed files with 198 additions and 2 deletions
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libsolidity/parsing/Scanner.cpp
+26 -2
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@@ -726,8 +726,21 @@ Token::Value Scanner::scanHexString()
void Scanner::scanDecimalDigits()
{
while (isDecimalDigit(m_char))
if (!isDecimalDigit(m_char)) // avoid underscore at beginning
return;
while (isDecimalDigit(m_char) || m_char == '_')
{
if (m_char == '_')
{
advance();
if (!isDecimalDigit(m_char)) // avoid trailing underscore
{
rollback(1);
break;
}
}
addLiteralCharAndAdvance();
}
}
Token::Value Scanner::scanNumber(char _charSeen)
@@ -755,8 +768,19 @@ Token::Value Scanner::scanNumber(char _charSeen)
addLiteralCharAndAdvance();
if (!isHexDigit(m_char))
return Token::Illegal; // we must have at least one hex digit after 'x'/'X'
while (isHexDigit(m_char))
while (isHexDigit(m_char) || m_char == '_') // same logic as scanDecimalDigits
{
if (m_char == '_')
{
advance();
if (!isHexDigit(m_char)) // avoid trailing underscore
{
rollback(1);
break;
}
}
addLiteralCharAndAdvance();
}
}
else if (isDecimalDigit(m_char))
// We do not allow octal numbers