public override Node VisitLet([NotNull] TigerParser.LetContext context)
{
var node = new LetNode(context);
TigerParser.DeclsContext[] decls = context.decls();
var declarations = new DeclarationListNode(decls[0]);
declarations.Children.AddRange(from d in decls select Visit(d)); // declaration list -> DECLARATION+
node.Children.Add(declarations); // DECLARATION LIST
TigerParser.ExprContext[] exprs = context.expr();
ExpressionSeqNode expressions;
if (exprs.Length > 0)
{
expressions = new ExpressionSeqNode(exprs[0]);
}
else
{
expressions = new ExpressionSeqNode(-1, -1);
}
expressions.Children.AddRange(from e in exprs select Visit(e)); // expression sequence -> EXPRESSION*
node.Children.Add(expressions); // EXPRESSION SEQUENCE
return(node);
}
/// <summary>
/// Visit a parse tree produced by the <c>Let</c>
/// labeled alternative in <see cref="TigerParser.expr"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitLet([NotNull] TigerParser.LetContext context)
{
return(VisitChildren(context));
}