Since `R-assignment` in CRuby is abandoned. Single-line pattern matching
in `mruby` only matches single local variable at the moment. Currently
it works as a right assignment to a local variable. It will be enhanced
in the future.
In addition, update the documents referring `build_config.rb` which is
no longer used. The new `build_config.rb` describes the new configuration
structure in the comment.
The "a"/"*" specifier of the `mrb_get_args()` function will now return `const mrb_value *`.
This is because it is difficult for the caller to check if it is an array object and write-barrier if necessary.
And it requires calling `mrb_ary_modify()` on the unmodified array object, which is also difficult (this is similar to #5087).
Files under `test/t` and `mrbgem/*/test` are for tests, not for actual
execution. So symbols in those files need not to be pre-allocated. This
change slightly reduce the memory consumption.
`MRB_TRY()` does not work when compiled by C compiler with `cxx_exception`,
due to the mixture of `setjmp()` used by `mirb.c` and `throw` used by
the core. The original intension of e2e6554b56 is to protect code from
signal interruption, but the signal interruption is not well-defined in
mruby anyway.
- `mrb_check_intern()` to return `mrb_value`
- `mrb_intern_check()` to return `mrb_sym` [NEW]
Other new functions:
- `mrb_intern_check_cstr()`
- `mrb_intern_check_str()`
Rename new functions:
- `mrb_convert_type(mrb,val,type,tname,method)`
=> `mrb_type_convert(mrb,val,type,tname,method)`
- `mrb_check_convert_type(mrb,val,type,tname,method)`
=> `mrb_type_convert_check(mrb,val,type,tname,method)`
Old names are defined by macros (support `tname` drop and
`char*` => `mrb_sym` conversion).
Linux `atan2(3)` man page says:
```
If y is positive infinity (negative infinity) and x is positive infinity,
+pi/4 (-pi/4) is re‐ turned.
```
But on Microsoft VC/MinGW, `atan2()` returns `NaN` if either of
arguments is infinite. So we skip those tests on the platforms.
They are basically the copy of instance variable tables. On my Linux
box, memory consumption of `mrbtest` measured by `valgrind` is:
- old: 17,683,830 bytes
- new: 14,283,749 bytes
- Integrate `Fixnum` and `Integer`
- Remove `Integral`
- `int / int -> int`
- Replace `mrb_fixnum()` to `mrb_int()`
- Replace `mrb_fixnum_value()` to `mrb_int_value()`.
- Use `mrb_integer_p()` instead of `mrb_fixnum_p()`
They used to return `mrb_value` but now return `mrb_sym` for consistency
with other `intern` functions. If symbols are not defined, `check`
functions return `0`, instead of `nil` in the past.
It causes API incompatibility but I believe few people use those
functions out of the core, and those changes are very easy to handle,
hopefully.
Yukihiro "Matz" Matsumoto