/// <summary>
/// Initializes a new valid <see cref="ParseResult"/>.
/// </summary>
/// <param name="result">The version bound.</param>
/// <param name="isApproximated">Whether the version bound is an approximation.</param>
/// <param name="fourthPartLost">Whether a 4th (or more) part (like in "1.2.3.4") has been ignored.</param>
public ParseResult(SVersionBound result, bool isApproximated, bool fourthPartLost)
{
Result = result;
IsApproximated = isApproximated;
FourthPartLost = fourthPartLost;
Error = null;
}
/// <summary>
/// Tries to parse a version bound: it is a <see cref="SVersion.TryParse(ref ReadOnlySpan{char}, bool, bool, bool)"/> that may be
/// followed by an optional bracketed "[<see cref="TryParseLockAndMinQuality"/>]".
/// The head is forwarded right after the match: on success, the head may be on any kind of character.
/// </summary>
/// <param name="head">The string to parse (leading and internal white spaces between tokens are skipped).</param>
/// <param name="bound">The result. This is <see cref="SVersionBound.None"/> on error.</param>
/// <param name="defaultLock">Default lock to apply if none is provided.</param>
/// <param name="defaultQuality">Default quality to apply if none is provided.</param>
/// <returns>True on success, false otherwise.</returns>
public static bool TryParse(ref ReadOnlySpan <char> head, out SVersionBound bound, SVersionLock defaultLock = SVersionLock.None, PackageQuality defaultQuality = PackageQuality.None)
{
var sHead = head;
bound = SVersionBound.None;
var v = SVersion.TryParse(ref Trim(ref head), checkBuildMetaDataSyntax: false);
if (!v.IsValid)
{
head = sHead;
return(false);
}
SVersionLock l = SVersionLock.None;
PackageQuality q = PackageQuality.None;
if (Trim(ref head).Length > 0 && TryMatch(ref head, '['))
{
// Allows empty []. Note that TryParseLockAndMinQuality calls Trim.
TryParseLockAndMinQuality(ref head, out l, out q);
// Match the closing ] if it's here. Ignores it if it's not here.
if (Trim(ref head).Length > 0)
{
TryMatch(ref head, ']');
}
}
if (l == SVersionLock.None)
{
l = defaultLock;
}
if (q == PackageQuality.None)
{
q = defaultQuality;
}
bound = new SVersionBound(v, l, q);
return(true);
}
static ParseResult TryMatchHeadRange(ref ReadOnlySpan <char> s, bool includePrerelease)
{
// Handling the marvelous "" (empty string), that is like '*'.
if (s.Length == 0)
{
return(new ParseResult(new SVersionBound(_000Version, SVersionLock.None, includePrerelease ? PackageQuality.None : PackageQuality.Stable), isApproximated: !includePrerelease, false));
}
if (TryMatch(ref s, '>'))
{
bool isApproximated = !TryMatch(ref s, '=');
return(TryMatchRangeAlone(ref Trim(ref s), SVersionLock.None, includePrerelease).Result.EnsureIsApproximated(isApproximated));
}
if (TryMatch(ref s, '<'))
{
if (TryMatch(ref s, '='))
{
return(TryMatchRangeAlone(ref Trim(ref s), SVersionLock.Lock, includePrerelease).Result.EnsureIsApproximated(true));
}
// We totally ignore any '<'...
var forget = TryMatchRangeAlone(ref Trim(ref s), SVersionLock.None, includePrerelease).Result;
return(forget.Error != null ? forget : new ParseResult(SVersionBound.All.SetMinQuality(includePrerelease ? PackageQuality.CI : PackageQuality.Stable), true, forget.FourthPartLost));
}
if (TryMatch(ref s, '~'))
{
return(TryMatchRangeAlone(ref Trim(ref s), SVersionLock.LockMinor, includePrerelease).Result);
}
if (TryMatch(ref s, '^'))
{
var r = TryMatchRangeAlone(ref Trim(ref s), SVersionLock.LockMajor, includePrerelease);
if (r.Result.Error == null)
{
bool noMoreApproximation = false;
SVersionBound v = r.Result.Result;
if (v.Base.Major == 0)
{
if (v.Lock == SVersionLock.LockMajor && !r.IsFloatingMinor)
{
v = v.SetLock(SVersionLock.LockMinor);
if (v.Base.Minor == 0 && v.Lock == SVersionLock.LockMinor)
{
v = v.SetLock(SVersionLock.LockPatch);
noMoreApproximation = true;
}
}
}
else
{
// Major != 0.
if (v.Lock > SVersionLock.LockMajor)
{
v = v.SetLock(SVersionLock.LockMajor);
}
}
r.Result = r.Result.SetResult(v);
if (noMoreApproximation)
{
r.Result = r.Result.ClearApproximated();
}
}
return(r.Result);
}
// '=' prefix is optional.
if (TryMatch(ref s, '='))
{
Trim(ref s);
}
return(TryMatchRangeAlone(ref s, SVersionLock.Lock, includePrerelease).Result);
}
/// <summary>
/// Applies a new <see cref="Result"/> and returns this or a new result.
/// </summary>
/// <param name="result">The new result.</param>
/// <returns>This or a new result.</returns>
public ParseResult SetResult(SVersionBound result) => result.Equals(Result)
? this
: new ParseResult(result, IsApproximated, FourthPartLost);
/// <summary>
/// Tries to parse a version bound: it is a <see cref="SVersion.TryParse(ref ReadOnlySpan{char}, bool, bool, bool)"/> that may be
/// followed by an optional bracketed "[<see cref="TryParseLockAndMinQuality"/>]".
/// </summary>
/// <param name="head">The string to parse (leading and internal white spaces between tokens are skipped).</param>
/// <param name="bound">The result. This is <see cref="SVersionBound.None"/> on error.</param>
/// <param name="defaultLock">The <see cref="SVersionLock"/> to use when no lock appears in the string to parse.</param>
/// <param name="defaultQuality">The <see cref="PackageQuality"/> to use when no lock appears in the string to parse.</param>
/// <returns>True on success, false otherwise.</returns>
public static bool TryParse(ReadOnlySpan <char> head, out SVersionBound bound, SVersionLock defaultLock = SVersionLock.None, PackageQuality defaultQuality = PackageQuality.None) => TryParse(ref head, out bound, defaultLock, defaultQuality);
/// <summary>
/// Initializes a new <see cref="ParseResult"/> on error.
/// </summary>
/// <param name="error">The error message.</param>
public ParseResult(string error)
{
Result = SVersionBound.None;
IsApproximated = FourthPartLost = false;
Error = error ?? throw new ArgumentNullException(nameof(error));
}