void Preprocessor::parseMultiLineComment()
{
advance(2);
setFirstOnLine(false);
for (;;)
{
if (!hasMore())
{
logError("%s:%u: Unexpected end of file in multi-line comment",
files.back().name,
files.back().line);
throw Exception("Unexpected end of file in multi-line comment");
}
if (c(0) == '*' && c(1) == '/')
{
advance(2);
break;
}
else if (isNewLine())
parseNewLine();
else
advance(1);
}
appendToOutput();
}
Token Lexer::nextToken()
{
if (atEof_) {
return Token(TokenType::END_OF_INPUT, "");
}
if (std::isdigit(next_)) {
return parseNumber();
} else if (isIdentifierStart(next_)) {
return parseIdentifier();
} else if (isEol(next_)) {
return parseNewLine();
} else {
return parseOperator();
}
}
void Preprocessor::parse(const char* name, const char* text)
{
if (std::find(names.begin(), names.end(), name) != names.end())
return;
files.push_back(File(name, text));
names.push_back(name);
list += format("( file %u: %s )\n", (uint) names.size(), name);
output.reserve(output.size() + std::strlen(text));
appendToOutput(format("#line 0 %u /* entering %s */\n",
(uint) files.size(),
files.back().name).c_str());
while (hasMore())
{
if (isMultiLineComment())
parseMultiLineComment();
else if (isSingleLineComment())
parseSingleLineComment();
else if (isNewLine())
parseNewLine();
else if (isWhitespace())
parseWhitespace();
else if (isCommand())
parseCommand();
else
{
advance(1);
appendToOutput();
setFirstOnLine(false);
}
}
files.pop_back();
if (!files.empty())
{
appendToOutput(format("\n#line %u %u /* returning to %s */",
files.back().line,
(uint) files.size(),
files.back().name).c_str());
}
}
