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shuujii/enumeratorChain-rewind-shouldnt-rewind-elements-arent-iterated
`Enumerator::Chain#rewind` shouldn't rewind elements aren't iterated
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### Example:
```ruby
# example.rb
e = [1]
def e.rewind; p :r end
c = e.chain(e)
c.each{break c}.rewind
```
#### Before this patch:
```terminal
$ bin/mruby example.rb
:r
:r
```
#### After this patch (same as Ruby):
```terminal
$ bin/mruby example.rb
:r
```
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shuujii/array-permutation-with-a-negative-argument-should-not-yield
`Array#permutation` with a negative argument should not yield
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Before this patch:
$ bin/mruby -e '[1].permutation(-1){|v| p v}' #=> [1]
After this patch (same as Ruby):
$ bin/mruby -e '[1].permutation(-1){|v| p v}' #=> no output
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Compile `if expr.nil?` to use `OP_JMPNIL` instead of calls.
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Array index became potentially negative because `uint32_t` is cast to
`mrb_int`.
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shuujii/fix-wrong-argument-for-fprintf-in-mruby-bin-mrbc
Fix wrong argument for `fprintf` in `mruby-bin-mrbc`
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shuujii/fix-Range-max-test-TypeError-is-raised-on-32-bit-mode
Fix `Range#max` test (`TypeError` is raised) on 32-bit mode
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Because the linker gives a warning on FreeBSD 12.0.
```
warning: mktemp() possibly used unsafely; consider using mkstemp()
```
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Remove deprecated iij stuffs
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Suppress warnings for `strncat()`
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Simplify get arguments
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Make symbolic link names unique for test
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`strncat()` also needs `'\0'`.
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- `mrb_str_index_m()` and `mrb_str_rindex()`
Make `mrb_get_args()` called only once from called twice.
- `mrb_str_byteslice()`
Replace `goto` with `if ~ else`.
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But this changes requires `OP_ARYCAT` and `OP_ARYPUSH` to accept `nil`
as their first operand. Alternative VMs (e.g. `mruby/c`) that understand
mruby bytecode need to be updated.
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Math.hypot avoids premature overflow and underflow
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`mrb_string_value_cstr` and `mrb_string_value_len`: obsolete
`mrb_string_cstr`: new function to retrieve NULL terminated C string
`RSTRING_CSTR`: wrapper macro of `mrb_string_cstr`
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shuujii/use-new-specifiers-modifiers-of-mrb_vfromat
Use new specifiers/modifiers of `mrb_vfromat()`
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The binary sizes (gems are only `mruby-bin-mruby`) are reduced slightly in
my environment than before the introduction of new specifiers/modifiers
(5116789a) with this change.
------------+-------------------+-------------------+--------
BINARY | BEFORE (5116789a) | AFTER (This PR) | RATIO
------------+-------------------+-------------------+--------
mruby | 593416 bytes | 593208 bytes | -0.04%
libmruby.a | 769048 bytes | 767264 bytes | -0.23%
------------+-------------------+-------------------+--------
BTW, I accidentally changed `tasks/toolchains/visualcpp.rake` at #4613,
so I put it back.
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shuujii/use-mrb_int-instead-of-to_int-in-mruby-numeric-ext
Use `mrb_int()` instead of `to_int()` in `mruby-numeric-ext`
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Add constants for floating point number
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- `size_t` is more commonly used.
- `len` argument of `mrb_str_new()` is `size_t`.
NOTE:
The test for `%l` is temporarily disabled because adding a new type to
`mrbgems/mruby-test/vformat.c` causes an error (memory error?) on Visual
Studio 2017 in AppVeyor.
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Fix `mrb_vformat("%f")` with `MRB_USE_FLOAT`
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It potentially not work when `mrb_float` is `float` because `float` variable
in variable length arguments is promoted to `double`.
Also I fixed build with `MRB_WITHOUT_FLOAT`.
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Warnings:
- If `MRB_TIME_T_UINT` is defined, the compiler issues a warning with an
integer comparison of different signs.
- It is mentioned that the `usec` variable passed to the
`mrb_to_time_t()` function may not be initialized
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It potentially breaks, for example, in the case of `mrb_int` is 64-bit
and more smaller type is passed by `%d`. In fact, the problem could
become apparent when I used `%d` to `backtrace_location::lineno` in
`src/backtrace.c:mrb_unpack_backtrace()` on AppVeyor.
Therefore, change `%d` for `int` (not `mrb_int`) so that it can be
used mostly without casting.
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Format sequence syntax:
%[modifier]specifier
Modifiers:
----------+------------------------------------------------------------
Modifier | Meaning
----------+------------------------------------------------------------
! | Convert to string by corresponding `inspect` instead of
| corresponding `to_s`.
----------+------------------------------------------------------------
Specifiers:
----------+----------------+--------------------------------------------
Specifier | Argument Type | Note
----------+----------------+--------------------------------------------
c | char |
d,i | mrb_int |
f | mrb_float |
l | char*, mrb_int | Arguments are string and length.
n | mrb_sym |
s | char* | Argument is NUL terminated string.
t | mrb_value | Convert to type (class) of object.
v,S | mrb_value |
C | struct RClass* |
T | mrb_value | Convert to real type (class) of object.
Y | mrb_value | Same as `!v` if argument is `true`, `false`
| | or `nil`, otherwise same as `T`.
% | - | Convert to percent sign itself (no argument
| | taken).
----------+----------------+--------------------------------------------
This change will increase the binary size, but replacing all format strings
with new specifiers/modifiers will decrease the size because it reduces
inline expansion of `mrb_obj_value()`, etc. at the caller.
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