public Node Program()
{
var node = new ProgramNode();
while (CurrentToken != TokenCategory.EOF)
{
if (CurrentToken == TokenCategory.VAR)
{
node.Add(VarDef());
}
else
{
node.Add(FunDef());
}
}
Expect(TokenCategory.EOF);
return(node);
}
public Node Program()
{
var program_node = new ProgramNode();
program_node.Add(new ConstantListNode());
if (Has(TokenCategory.CONST))
{
var node = program_node.Last();
node.AnchorToken = Expect(TokenCategory.CONST);
node.Add(OneOrMore(TokenCategory.IDENTIFIER, ConstantDeclaration));
}
;
program_node.Add(new VariableDeclarationNode());
if (Has(TokenCategory.VAR))
{
var node = program_node.Last();
node.AnchorToken = Expect(TokenCategory.VAR);
node.Add(OneOrMore(TokenCategory.IDENTIFIER, VariableDeclaration));
}
program_node.Add(new ProcedureListNode());
if (Has(TokenCategory.PROCEDURE))
{
var node = program_node.Last();
node.Add(ZeroOrMore(TokenCategory.PROCEDURE, ProcedureDeclaration));
}
program_node.AnchorToken = Expect(TokenCategory.PROGRAM);
program_node.Add(new StatementListNode());
if (Has(firstOfStatement))
{
var node = program_node.Last();
node.Add(ZeroOrMore(firstOfStatement, Statement));
}
Expect(TokenCategory.END);
Expect(TokenCategory.SEMICOLON);
return(program_node);
}