public override BaseNode VisitConstant(QueryFilteringParser.ConstantContext context)
{
switch (context.value.Type)
{
case QueryFilteringLexer.INT:
return(new IntNode(context.value.Text));
case QueryFilteringLexer.LONG:
return(new LongNode(context.value.Text));
case QueryFilteringLexer.DOUBLE:
return(new DoubleNode(context.value.Text));
case QueryFilteringLexer.FLOAT:
return(new FloatNode(context.value.Text));
case QueryFilteringLexer.DECIMAL:
return(new DecimalNode(context.value.Text));
case QueryFilteringLexer.BOOL:
return(new BoolNode(context.value.Text));
case QueryFilteringLexer.GUID:
return(new GuidNode(context.value.Text));
case QueryFilteringLexer.NULL:
return(new NullNode());
case QueryFilteringLexer.STRING:
return(new StringNode(context.value.Text));
case QueryFilteringLexer.DATETIME:
return(new DateTimeNode(context.value.Text));
default:
throw new ParseRuleException(
nameof(FilterExpressionVisitor),
$"неизвестный тип данных '{context.value.Type}'");
}
}
/// <summary>
/// Visit a parse tree produced by <see cref="QueryFilteringParser.constant"/>.
/// <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 VisitConstant([NotNull] QueryFilteringParser.ConstantContext context)
{
return(VisitChildren(context));
}
