JS_ENUM Defaults

[13022591351]

how can I setenum defaults like this
JS_ENUM(Color, Red = 0x01, Green = 0x02, Blue = 0x03, Yellow4 = 0x04, Purple = 0x05)
struct ColorData {
Color color;

JS_OBJ(color);

};
JS_ENUM_DECLARE_STRING_PARSER(Color)

Compilation can pass, but running or have assert in source code 4438 lines.

I looked at the code and probably understood that this is looking for the name of the enumeration member, but there is no related '=' processing。

Does this library support enumerations with initial values?

[jorgen]

You are correct, there is no support for initial values. The enum support needs some love if anyone out there has the time.

[gerwaric]

I have been toying with this problem, and I think a new parser macro for enumeration classes might be the way to go.

I tried improving JS_ENUM by extending populateEnumNames(), but the parser quickly gets complicated, or it has to impose restrictions on how enumerations are declared. I also looked into variadic macros and reflection, but that's tricky business..

So instead I'm using plain enumerations like enum class Color { Red = 1, Blue, Green }; with a macro to define the associated type handler, JS_ENUM_DECLARE_VALUE_PARSER(Color);. The parser checks the signedness of the underlying type and defers to either TypeHandler<int> or TypeHandler<unsigned int>, so the enumumeration is treated as an integer instead of as a string for reads and writes.

@jorgen, if that sounds interesting, would you be open to a pull request?

[jorgen]

Ah, cool! Sure thing👍

[gerwaric]

Done. I've completed some rudimentary testing on my own, but if this looks usable, let me know if you want help creating test cases.