protected override void WalkRepetitionExpression(RepetitionExpression repetitionExpression)
{
base.WalkRepetitionExpression(repetitionExpression);
if (this.zeroWidth[repetitionExpression.Expression] && (repetitionExpression.Quantifier.Delimiter == null || this.zeroWidth[repetitionExpression.Quantifier.Delimiter]))
{
var containsAssertions = this.containsAssertions[repetitionExpression.Expression] || (repetitionExpression.Quantifier.Delimiter != null && this.containsAssertions[repetitionExpression.Quantifier.Delimiter]);
var cursor = repetitionExpression.Quantifier.Start;
if (repetitionExpression.Quantifier.Max == null)
{
if (containsAssertions)
{
this.result.AddCompilerError(cursor, () => Resources.PEG0021_WARNING_ZeroWidthRepetition);
}
else
{
this.result.AddCompilerError(cursor, () => Resources.PEG0021_ERROR_ZeroWidthRepetition);
}
}
else if (repetitionExpression.Quantifier.Min != repetitionExpression.Quantifier.Max)
{
if (containsAssertions)
{
this.result.AddCompilerError(cursor, () => Resources.PEG0022_WARNING_ZeroWidthRepetition);
}
else
{
this.result.AddCompilerError(cursor, () => Resources.PEG0022_ERROR_ZeroWidthRepetition);
}
}
}
}
protected override void WalkRepetitionExpression(RepetitionExpression repetitionExpression)
{
if (repetitionExpression.Quantifier.Max == 0 ||
repetitionExpression.Quantifier.Max < repetitionExpression.Quantifier.Min)
{
this.result.AddCompilerError(repetitionExpression.Quantifier.Start, () => Resources.PEG0015_WARNING_QuantifierInvalid);
}
if (repetitionExpression.Quantifier.Max == 1 &&
repetitionExpression.Quantifier.Delimiter != null)
{
this.result.AddCompilerError(repetitionExpression.Quantifier.Start, () => Resources.PEG0024_WARNING_UnusedDelimiter);
}
base.WalkRepetitionExpression(repetitionExpression);
}
protected virtual void WalkRepetitionExpression(RepetitionExpression repetitionExpression)
{
this.WalkExpression(repetitionExpression.Expression);
if (repetitionExpression.Quantifier.Delimiter != null)
{
this.WalkExpression(repetitionExpression.Quantifier.Delimiter);
}
}
protected override void WalkRepetitionExpression(RepetitionExpression repetitionExpression)
{
base.WalkRepetitionExpression(repetitionExpression);
this.Set(repetitionExpression, repetitionExpression.Expression, type => "IList<" + type + ">");
}
protected override void WalkRepetitionExpression(RepetitionExpression repetitionExpression)
{
base.WalkRepetitionExpression(repetitionExpression);
var result = this.containsAssertions[repetitionExpression.Expression];
if (repetitionExpression.Quantifier.Delimiter != null)
{
result |= this.containsAssertions[repetitionExpression.Quantifier.Delimiter];
}
this.containsAssertions[repetitionExpression] = result;
}
protected override void WalkRepetitionExpression(RepetitionExpression repetitionExpression) => this.RenderRepetitionExpression(repetitionExpression, this.writer, this.currentIndentation);
protected override void WalkRepetitionExpression(RepetitionExpression repetitionExpression)
{
base.WalkRepetitionExpression(repetitionExpression);
bool? result;
if (repetitionExpression.Quantifier.Min == 0)
{
result = true;
}
else if (repetitionExpression.Quantifier.Min <= 1 || repetitionExpression.Quantifier.Delimiter == null)
{
result = this.zeroWidth[repetitionExpression.Expression];
}
else
{
result = this.zeroWidth[repetitionExpression.Expression] & this.zeroWidth[repetitionExpression.Quantifier.Delimiter];
}
this.zeroWidth[repetitionExpression] = result;
}
