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enabled developer naming their column same as valid v… #344

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enabled developer naming their column same as valid v… #344

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6 changes: 3 additions & 3 deletions src/Microsoft.ML/Data/TextLoader.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -43,7 +43,7 @@ public TextLoaderRange(int min, int max)
{

Contracts.CheckParam(min >= 0, nameof(min), "Cannot be a negative number.");
Contracts.CheckParam(max >= min, nameof(max), "Cannot be less than " + nameof(min) +".");
Contracts.CheckParam(max >= min, nameof(max), "Cannot be less than " + nameof(min) + ".");

Min = min;
Max = max;
Expand Down Expand Up @@ -84,8 +84,8 @@ public TextLoader CreateFrom<TInput>(bool useHeader = false,
$"Valid characters are 0-9, *, - and ~");

var name = mappingAttr.Name ?? field.Name;
if (name.Any(c => !Char.IsLetterOrDigit(c)))
throw Contracts.Except($"{name} is not alphanumeric.");
if (Regex.Match(name, @"^[a-zA-Z_@]\w*$").Success)
throw Contracts.Except($"{name} contains invalid characters as a column name. ");

Runtime.Data.TextLoader.Range[] sources;
if (!Runtime.Data.TextLoader.Column.TryParseSourceEx(mappingAttr.Ordinal, out sources))
Expand Down