/// <summary>
/// Creates a new <see cref="Signature"/> just like this one, but with a custom function that
/// builds a list of parameter associated with each argument.
/// </summary>
public Signature WithLayout(ParameterLayout layout)
{
return(new Signature(this.ReturnKind, this._returnType, this._body, this.Declaration, this.CustomReturnType, this._tabularity, this.Parameters, layout, this.IsHidden));
}
private Signature(
ReturnTypeKind returnKind,
TypeSymbol returnType,
string body,
FunctionDeclaration declaration,
CustomReturnType customReturnType,
Tabularity tabularity,
IReadOnlyList <Parameter> parameters,
ParameterLayout layout = null,
bool isHidden = false)
{
if (returnKind == ReturnTypeKind.Declared && returnType == null)
{
throw new ArgumentNullException(nameof(returnType));
}
if (returnKind == ReturnTypeKind.Computed && !(body != null | declaration != null))
{
throw new ArgumentNullException(nameof(body));
}
if (returnKind == ReturnTypeKind.Custom && customReturnType == null)
{
throw new ArgumentNullException(nameof(customReturnType));
}
this.ReturnKind = returnKind;
this._returnType = returnType;
this._body = body;
this.Declaration = declaration;
this.CustomReturnType = customReturnType;
this._tabularity = tabularity;
this.Parameters = parameters.ToReadOnly();
this.IsHidden = isHidden;
if (returnKind == ReturnTypeKind.Computed &&
returnType != null &&
tabularity == Tabularity.Unknown)
{
this._tabularity = returnType.Tabularity;
}
int minArgumentCount = 0;
int maxArgumentCount = 0;
foreach (var p in this.Parameters)
{
if (p.IsRepeatable)
{
this.HasRepeatableParameters = true;
}
if (p.IsOptional)
{
this.HasOptionalParameters = true;
}
if (p.ArgumentKind == ArgumentKind.Aggregate)
{
this.HasAggregateParameters = true;
}
minArgumentCount += p.MinOccurring;
maxArgumentCount += p.MaxOccurring;
}
this.MinArgumentCount = minArgumentCount;
this.MaxArgumentCount = maxArgumentCount;
if (layout != null)
{
this.Layout = layout;
}
else if (this.HasRepeatableParameters)
{
this.Layout = ParameterLayouts.Repeating;
}
else
{
this.Layout = ParameterLayouts.Fixed;
}
}
