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Asked: 2026-05-14T04:14:45+00:00

If I want to trigger an error in my interpreter I call this function:

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If I want to trigger an error in my interpreter I call this function:

Error( ErrorType type, ErrorSeverity severity, const char* msg, int line );

However, with that I can only output

Name error: Undefined variable in line 1

instead of

Name error: Undefined variable 'someVariableName' in line 1

I’m working entirely with strings (except for the error messages as they all are constant at the moment), so sprintf won’t work.

  • What is the best way to create an efficient error function that can output a constant message combined with a string that describes which object, e.g.: a non-existing variable, triggered the error?
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1 Answer

  1. Editorial Team

    This is C++, so you can overload your function with an extra parameter to provide the variable name. I would then use a std::stringstream to format the message. There is no need to worry about “efficiency” when reporting errors, as they should be rare and don’t affect an application’s overall performance.

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