The Stringer interface

The Stringer interface is not a standard Go interface; the provided code uses the stringer tool to generate String() methods for bitset types like ActualExprPropBits, CSPropBits, FuncPropBits, and ParamPropBits. These generated methods convert integer bit flags into human-readable strings by checking against predefined value arrays and joining matching names with pipes. To regenerate these files when constants change, run the stringer command with the -bitset flag and the specific type name in the package directory.

The Stringer interface is an automated tool that turns numbers representing settings into readable words. It helps developers see exactly which options are active in a complex configuration without needing to decode binary math. Think of it like a translator that converts a secret code into plain English so you can understand what your program is doing.