public static bool TryParse(string range, out IVersionSpecification specification)
{
bool startInclusive = false;
bool endInclusive = false;
if (range.StartsWith("["))
{
startInclusive = true;
}
else if (!range.StartsWith("("))
{
specification = null;
return(false);
}
if (range.EndsWith("]"))
{
endInclusive = true;
}
else if (!range.EndsWith(")"))
{
specification = null;
return(false);
}
string[] parts = range.Split('-');
if (parts.Length != 2)
{
specification = null;
return(false);
}
string startVersion = parts[0].Substring(1);
string endVersion = parts[1].Substring(0, parts[1].Length - 1);
if (IsWildcardVersion(startVersion) && IsWildcardVersion(endVersion))
{
specification = null;
return(false);
}
else if (!IsWildcardVersion(startVersion) && !VersionStringHelpers.IsVersionWellFormed(startVersion))
{
specification = null;
return(false);
}
else if (!IsWildcardVersion(endVersion) && !VersionStringHelpers.IsVersionWellFormed(endVersion))
{
specification = null;
return(false);
}
specification = new RangeVersionSpecification(startVersion, endVersion, startInclusive, endInclusive);
return(true);
}
public static bool TryParseVersionSpecification(string versionString, out IVersionSpecification specification)
{
if (string.IsNullOrEmpty(versionString))
{
specification = null;
return(false);
}
else if (versionString.Contains("-"))
{
return(RangeVersionSpecification.TryParse(versionString, out specification));
}
else
{
return(ExactVersionSpecification.TryParse(versionString, out specification));
}
}