static void EmitAst(Ancora.AstNode Node, int Depth = 0)
{
Console.WriteLine(new String(' ', Depth) + Node.NodeType + " : " + (Node.Value == null ? "null" : Node.Value.ToString()));
foreach (var child in Node.Children)
{
EmitAst(child, Depth + 1);
}
}
public BlockGrammar()
{
var ws = Maybe(Token(c => " \r\n\t".Contains(c))).WithMutator(n => null);
var semi = Character(';').WithMutator(n => null);
var identifierStartChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_";
var identifierChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-0123456789_";
var identifier = Identifier(c => identifierStartChars.Contains(c), c => identifierChars.Contains(c)).Ast("IDENT");
var number = Token(c => "0123456789".Contains(c)).Ast("NUMBER");
var list = (Character('[').WithMutator(n => null) + ws +
DelimitedList((ws + identifier + ws).WithMutator(n => n.Children[0]), Character(',').WithMutator(n => null))
.WithMutator(n =>
{
var r = new Ancora.AstNode { NodeType = "LIST", Location = n.Location };
r.Children.Add(n.Children[0]);
foreach (var sub in n.Children[1].Children)
r.Children.Add(sub.Children[0]);
return r;
}) + ws + Character(']').WithMutator(n => null)).WithMutator(n => n.Children[0]);
var tileDefinition = (Keyword("tile") + ws + identifier + ws + number + ws + semi).WithMutator(n =>
{
n.NodeType = "TILE";
n.Value = n.Children[1].Value;
var value = n.Children[2];
n.Children.Clear();
n.Children.Add(value);
return n;
});
var blockMember = (ws + identifier + ws + (identifier | number | list) + ws + semi).WithMutator(n =>
{
n.NodeType = "MEMBER";
n.Value = n.Children[0].Value;
n.Location = n.Children[0].Location;
var value = n.Children[1].Children[0];
n.Children.Clear();
n.Children.Add(value);
return n;
});
var blockBody = (Character('{').WithMutator(n => null) + ws + NoneOrMany(blockMember) + ws + '}').WithMutator(n => n.Children[0]);
var blockDefinition = (Keyword("block") + ws + identifier + ws + Maybe(blockBody) + ws + semi).WithMutator(n =>
{
n.NodeType = "BLOCK";
n.Value = n.Children[1].Value;
if (n.Children[2].Children.Count > 0)
{
var members = n.Children[2].Children[0];
n.Children = members.Children;
}
else
n.Children.Clear();
return n;
});
var file = NoneOrMany((ws + (tileDefinition | blockDefinition).WithMutator(n => n.Children[0]) + ws).WithMutator(n => n.Children[0])).Ast("ROOT");
Root = file;
}
