protected override ExpressionBody Transform(CallExpression lx)
{
if (!_nameResolver.TryResolveFunctionName(lx.OperatorName, out var m))
{
throw new ArgumentException($"The function name `{lx.OperatorName}` was not recognized.");
}
var parameterCount = m.GetParameters().Count(pi => pi.ParameterType == typeof(LogEventPropertyValue));
if (parameterCount != lx.Operands.Length)
{
throw new ArgumentException($"The function `{lx.OperatorName}` requires {parameterCount} arguments.");
}
var operands = lx.Operands.Select(Transform).ToList();
// `and` and `or` short-circuit to save execution time; unlike the earlier Serilog.Filters.Expressions, nothing else does.
if (Operators.SameOperator(lx.OperatorName, Operators.RuntimeOpAnd))
{
return(CompileLogical(LX.AndAlso, operands[0], operands[1]));
}
if (Operators.SameOperator(lx.OperatorName, Operators.RuntimeOpOr))
{
return(CompileLogical(LX.OrElse, operands[0], operands[1]));
}
if (m.GetParameters().Any(pi => pi.ParameterType == typeof(StringComparison)))
{
operands.Insert(0, LX.Constant(lx.IgnoreCase ? StringComparison.OrdinalIgnoreCase : StringComparison.Ordinal));
}
return(LX.Call(m, operands));
}