public override BaseNode VisitBoolExpression(QueryFilteringParser.BoolExpressionContext context)
{
var left = context.left.Accept(this);
var right = context.right.Accept(this);
switch (context.operation.Type)
{
case QueryFilteringLexer.EQUALS:
return(new EqualsNode(left, right));
case QueryFilteringLexer.NOTEQUALS:
return(new NotEqualsNode(left, right));
case QueryFilteringLexer.GREATERTHAN:
return(new GreaterThanNode(left, right));
case QueryFilteringLexer.GREATERTHANOREQUAL:
return(new GreaterThanOrEqualNode(left, right));
case QueryFilteringLexer.LESSTHAN:
return(new LessThanNode(left, right));
case QueryFilteringLexer.LESSTHANOREQUAL:
return(new LessThanOrEqualNode(left, right));
default:
throw new ParseRuleException(
nameof(FilterExpressionVisitor),
$"неизвестный тип операции '{context.operation.Type}'");
}
}
/// <summary>
/// Visit a parse tree produced by <see cref="QueryFilteringParser.boolExpression"/>.
/// <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 VisitBoolExpression([NotNull] QueryFilteringParser.BoolExpressionContext context)
{
return(VisitChildren(context));
}
