public void If(string condition, Action thenBody, Action?elseBody = null)
{
writer.Block($"if ({condition})", thenBody);
if (elseBody != null)
{
writer.Block($"else", elseBody);
}
}
private void Switch(IReadOnlyList <string> inlines, IndentWriter outlines)
{
var start = 0;
for (; start < inlines.Count; ++start)
{
if (inlines[start] == "\t\t\tswitch(node.Symbol.ID)")
{
break;
}
}
outlines.Block("switch(node.Symbol.ID)", () =>
{
for (start += 2; start < inlines.Count; ++start)
{
var line = inlines[start];
if (line == "\t\t\t}")
{
outlines.Indend("default:", () =>
{
outlines.WriteLine("throw new NotImplementedException();");
});
break;
}
line = line.Replace("visitor.", "return (T)");
line = line.Replace(" break;", string.Empty);
line = line.TrimStart('\t');
outlines.WriteLine(line);
}
});
}
private void Virtual(string line, IndentWriter outlines)
{
line = line.Substring(1); // remove '\t'
line = line.Replace(" {}", string.Empty);
line = line.Replace("public virtual void", "protected virtual object");
line = line.TrimStart('\t');
outlines.Block($"{line}", () =>
{
outlines.WriteLine($"return VisitChildren(node).FirstOrDefault();");
});
}
public void Dump(IWriter writer)
{
var output = new IndentWriter();
output.Block($"grammar {Grammar.Name}", () =>
{
PpSet(output, "options", false, Grammar.OptionList);
PpSet(output, "terminals", true, Grammar.Terminals);
PpSet(output, "rules", true, Grammar.Nonterminals);
});
output.Dump(writer);
}
private static void PpSet(IndentWriter writer, string name, bool separate, IEnumerable <Symbol> members)
{
writer.Block(name, () =>
{
var more = false;
foreach (var item in members)
{
if (separate && more)
{
writer.WriteLine();
}
PpAnySymbol(writer, item);
more = true;
}
});
}