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#include <libsolidity/parsing/DocStringParser.h>
#include <liblangutil/ErrorReporter.h>
#include <liblangutil/Exceptions.h>
#include <boost/range/irange.hpp>
#include <boost/range/algorithm.hpp>
using namespace std;
using namespace dev;
using namespace dev::solidity;
namespace
{
string::const_iterator skipLineOrEOS(
string::const_iterator _nlPos,
string::const_iterator _end
)
{
return (_nlPos == _end) ? _end : ++_nlPos;
}
string::const_iterator firstSpaceOrTab(
string::const_iterator _pos,
string::const_iterator _end
)
{
return boost::range::find_first_of(make_pair(_pos, _end), " \t");
}
string::const_iterator firstWhitespaceOrNewline(
string::const_iterator _pos,
string::const_iterator _end
)
{
return boost::range::find_first_of(make_pair(_pos, _end), " \t\n");
}
string::const_iterator skipWhitespace(
string::const_iterator _pos,
string::const_iterator _end
)
{
auto currPos = _pos;
while (currPos != _end && (*currPos == ' ' || *currPos == '\t'))
currPos += 1;
return currPos;
}
}
bool DocStringParser::parse(string const& _docString, ErrorReporter& _errorReporter)
{
m_errorReporter = &_errorReporter;
m_errorsOccurred = false;
m_lastTag = nullptr;
auto currPos = _docString.begin();
auto end = _docString.end();
while (currPos != end)
{
auto tagPos = find(currPos, end, '@');
auto nlPos = find(currPos, end, '\n');
if (tagPos != end && tagPos < nlPos)
{
// we found a tag
auto tagNameEndPos = firstWhitespaceOrNewline(tagPos, end);
if (tagNameEndPos == end)
{
appendError("End of tag " + string(tagPos, tagNameEndPos) + " not found");
break;
}
currPos = parseDocTag(tagNameEndPos + 1, end, string(tagPos + 1, tagNameEndPos));
}
else if (!!m_lastTag) // continuation of the previous tag
currPos = appendDocTag(currPos, end);
else if (currPos != end)
{
// if it begins without a tag then consider it as @notice
if (currPos == _docString.begin())
{
currPos = parseDocTag(currPos, end, "notice");
continue;
}
else if (nlPos == end) //end of text
break;
// else skip the line if a newline was found and we get here
currPos = nlPos + 1;
}
}
return !m_errorsOccurred;
}
DocStringParser::iter DocStringParser::parseDocTagLine(iter _pos, iter _end, bool _appending)
{
solAssert(!!m_lastTag, "");
auto nlPos = find(_pos, _end, '\n');
if (_appending && _pos < _end && *_pos != ' ' && *_pos != '\t')
m_lastTag->content += " ";
else if (!_appending)
_pos = skipWhitespace(_pos, _end);
copy(_pos, nlPos, back_inserter(m_lastTag->content));
return skipLineOrEOS(nlPos, _end);
}
DocStringParser::iter DocStringParser::parseDocTagParam(iter _pos, iter _end)
{
// find param name start
auto nameStartPos = skipWhitespace(_pos, _end);
if (nameStartPos == _end)
{
appendError("No param name given");
return _end;
}
auto nameEndPos = firstSpaceOrTab(nameStartPos, _end);
auto paramName = string(nameStartPos, nameEndPos);
auto descStartPos = skipWhitespace(nameEndPos, _end);
auto nlPos = find(descStartPos, _end, '\n');
if (descStartPos == nlPos)
{
appendError("No description given for param " + paramName);
return _end;
}
auto paramDesc = string(descStartPos, nlPos);
newTag("param");
m_lastTag->paramName = paramName;
m_lastTag->content = paramDesc;
return skipLineOrEOS(nlPos, _end);
}
DocStringParser::iter DocStringParser::parseDocTag(iter _pos, iter _end, string const& _tag)
{
// LTODO: need to check for @(start of a tag) between here and the end of line
// for all cases.
if (!m_lastTag || _tag != "")
{
if (_tag == "param")
return parseDocTagParam(_pos, _end);
else
{
newTag(_tag);
return parseDocTagLine(_pos, _end, false);
}
}
else
return appendDocTag(_pos, _end);
}
DocStringParser::iter DocStringParser::appendDocTag(iter _pos, iter _end)
{
solAssert(!!m_lastTag, "");
return parseDocTagLine(_pos, _end, true);
}
void DocStringParser::newTag(string const& _tagName)
{
m_lastTag = &m_docTags.insert(make_pair(_tagName, DocTag()))->second;
}
void DocStringParser::appendError(string const& _description)
{
m_errorsOccurred = true;
m_errorReporter->docstringParsingError(_description);
}
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