public static bool TryParse(string versionString, out SemVersion?result)
{
try
{
result = SemVersionParser.Parse(versionString);
return(true);
}
catch (Exception)
{
result = null;
return(false);
}
}
private ExpressionParsedData ParseExpression(string expression)
{
ExpressionParsedData expressionParsedData = new ExpressionParsedData();
if (expression.Length == 0)
{
return(expressionParsedData);
}
bool hasSeperator = Contains(expression, ',');
char leftSymbol = default(char);
char rightSymbol = default(char);
int begin = 0;
int end = expression.Length - 1;
if (!IsCharDigit(expression[0]))
{
leftSymbol = expression[0];
if (!Contains(k_LeftValidSymbols, leftSymbol))
{
throw new ExpressionNotValidException($"Invalid character {leftSymbol}", expression);
}
begin++;
}
var lastChar = expression[end];
if (!IsCharDigit(lastChar) && !IsCharLetter(lastChar))
{
rightSymbol = lastChar;
if (!Contains(k_RightValidSymbols, rightSymbol))
{
throw new ExpressionNotValidException($"Invalid character {rightSymbol}", expression);
}
end--;
}
if (leftSymbol != default(char) && rightSymbol == default(char) ||
leftSymbol == default(char) && rightSymbol != default(char))
{
throw new ExpressionNotValidException("Incomplete expression, missing symbol in start or end", expression);
}
int nextSemVer;
string leftSemVerString = PopSemanticVersion(expression, begin, end, out nextSemVer);
var hasLeftSemVer = !string.IsNullOrEmpty(leftSemVerString);
if (hasLeftSemVer)
{
expressionParsedData.leftSemVersion = SemVersionParser.Parse(leftSemVerString);
}
int notNeeded;
string rightSemVerString = PopSemanticVersion(expression, nextSemVer, end, out notNeeded);
var hasRightSemVer = !string.IsNullOrEmpty(rightSemVerString);
if (hasRightSemVer)
{
expressionParsedData.rightSemVersion = SemVersionParser.Parse(rightSemVerString);
}
expressionParsedData.GenerateExpressionTypeKey = new ExpressionTypeKey(leftSymbol: leftSymbol, rightSymbol: rightSymbol, hasSeparator: hasSeperator, hasLeftSemVer: hasLeftSemVer, hasRightSemVer: hasRightSemVer);
return(expressionParsedData);
}
public SemVersion Parse(string version, bool strict = false)
{
return(SemVersionParser.Parse(version, strict));
}
