I have a T4 template, which creates a series of static readonly variables derived from a pre-defined data set.
If I pass double.NaN as a constructor argument, the template output renders as NaN, not double.NaN, as I would have expected.
The relevant part of the template is:
<#= double.IsNaN(element.MeltingPoint) ? double.NaN : element.MeltingPoint #>
Which results in the compiler error:
The name 'NaN' does not exist in the current context
If I manually change the code to read double.NaN then it compiles just fine.
How can I force the output to read as the literal string double.NaN?
the result of calling double.NaN.ToString() (which the T4 Engine does in order to print the result in the generated file) is the string "NaN" (as a matter of fact, it is culture-specific).
If you want the literal string double.NaN, then use a string literal:
<#= double.IsNaN(element.MeltingPoint) ? "double.NaN" : element.MeltingPoint.ToString() #>