private string ToStringDefault(ParenMode mode)
{
bool useParen = mode == ParenMode.Always;
if (!useParen)
{
useParen = mode != ParenMode.Never && _values.Length > 1;
}
var sb = new StringBuilder();
if (useParen)
{
sb.Append("(");
}
var sj = new StringJoiner(sb, _joinString);
foreach (var v in _values)
{
sj.Add(FormatField() + v.ToString());
}
if (useParen)
{
sb.Append(")");
}
return(sb.ToString());
}
public string ToString(ParenMode mode)
{
if (_values[0].IsCombinable())
{
return(ToStringCombinable(mode));
}
else
{
return(ToStringDefault(mode));
}
}
public override string ToString(ParenMode mode)
{
var ret = base.ToString(ParenMode.Never);
if (ShouldUseParens(mode))
{
return("~(" + ret + ")");
}
else
{
return("~" + ret);
}
}
protected bool ShouldUseParens(ParenMode mode)
{
if (mode == ParenMode.Always)
{
return(true);
}
else if (mode == ParenMode.Never)
{
return(false);
}
else
{
return(children.Count > 1);
}
}
private string ToStringCombinable(ParenMode mode)
{
StringBuilder sb = new StringBuilder(FormatField());
if (_values.Length > 1 || mode == ParenMode.Always)
{
sb.Append("(");
}
var sj = new StringJoiner(sb, _joinString);
foreach (var v in _values)
{
sj.Add(v.ToString());
}
if (_values.Length > 1 || mode == ParenMode.Always)
{
sb.Append(")");
}
return(sb.ToString());
}
public virtual string ToString(ParenMode mode)
{
StringBuilder sb = new StringBuilder();
if (ShouldUseParens(mode))
{
sb.Append("(");
}
var sj = new StringJoiner(sb, GetJoinString());
foreach (var n in children)
{
sj.Add(n.ToString(mode));
}
if (ShouldUseParens(mode))
{
sb.Append(")");
}
return(sb.ToString());
}
