[Feature request] String to int64 conversion

[godrider]

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Is your feature request related to a problem? Please describe.

Recently #2421 was merged, which converts the new int64 type to a string. I would like to use a function that converts a string back to int64, just like the existing StringToInt64 function but for the real int64 type.

Describe the solution you'd like

A function such as int StringToInt64Ex(const char[] str, int64 result, int nBase) would be nice. This means we can keep StringToInt64 for backward compatibility. Even better would be to return the result without passing it as a parameter like the StringToInt function. Either way works for me.

[F1F88]

I'd like to work on this if nobody is already implementing it.

My plan is to swap the result argument and the return value in your scheme, like this:

/**
 * Converts a string to an int64 value.
 *
 * @param str           String to convert.
 * @param bytes         Number of characters consumed.
 * @param nBase         Numerical base to use.  10 is default.
 * @return              int64 conversion of string, or 0 on failure.
 */
native int64 StringToInt64Ex(const char[] str, int &bytes=0, int nBase=10);

The reason is that doing so allows for usage similar to native int StringToInt(const char[] str, int nBase=10);

int64 value = StringToInt64Ex("1234567654321");

It can also be used like native int StringToIntEx(const char[] str, int &result, int nBase=10);

int bytes;
int64 value = StringToInt64Ex("1234567654321", bytes);

If that approach sounds good, I'll open a small PR linked to this issue.

[psychonic]

If that approach sounds good, I'll open a small PR linked to this issue.

This seems reasonable to me. Thanks!