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This makes these functions weak, so that a sketch or library can replace
them. This does not apply to all of these operators, only for the ones
that the C++ standard specifies as replaceable.

This makes this header complete up to including C++14, except two
exception classes that cannot be defined without `<exception>`.

The functions related to the "new_handler" are declared but not actually
defined, to prevent overhead and complexity. They are still declared to
allow implementing them in user code if needed.

This makes the implementation of all operator new and delete functions
comply with the C++11/C++14 specification in terms of which should be
actually implemented and which should be delegate to other functions.

There are still some areas where these implementations are not entirely
standards-compliant, which will be fixed in subsequent commits.

This fixes part of #287 and fixes #47.

Originally, the Arduino core used "new.h", rather than the standard
"new", probably because the implementation was incomplete, and for the
most commonly used new and delete operators, no include is needed at all
(they are defined implicitly by the compiler). However, now Arduino
does expose the "new" name, as an alias for the older "new.h". Given
that the standard name is "new", it makes more sense to put the actual
content in "new", and make "new.h" a compatibility header that includes
"new" instead of the other way around.

move timout handling into its own function

change timeout from milliseconds to microseconds

don't forget operating slave address or the bitrate when we reset because of a timeout
Co-Authored-By: Witold Markowski <witold.a.markowski@gmail.com>

fix delay datatype uint16_t --> uint32_t

Update libraries/Wire/src/utility/twi.c

fix mix up using TWBR instea of TWAR!
Co-Authored-By: Matthijs Kooijman <matthijs@stdin.nl>

Update libraries/Wire/src/utility/twi.c

fix 2nd TWBR/TWAR mixup
Co-Authored-By: Matthijs Kooijman <matthijs@stdin.nl>

twi_stop() should use the same timeout as everywhere else

all while loops are now protected by timeouts

Revert "twi_stop() should use the same timeout as everywhere else"

This reverts commit 68fe5f1dae1bb41183bb37eeda3fb453394a580c.

make timeout counter volatile

rename timeout function for improved clarity

- resetting the twi interface on timeouts is now optional
- timeouts in the ISR are no longer hardcoded and now obey the set timeout value
- a user-readable flag is now set whenever a timeout occurs
  - the user can clear this flag whenever they like

Add "new" proxy header for compatibility with c++-standard #include<new>

Added precompiled library support

Correct comment on wiring_analog.c

Fix sine -> since typo in HardwareSerial files

* Interrupt ordering for 32u2 and 16u2 MCU
* Added missing chip variants

Port of https://github.com/arduino/Arduino/pull/7023

Remove Genuino Occurrences

Revert "Changed linking order, so precompiled libraries can be used"

This reverts commit 41f15a13.

No fixed value for USB power current.

* Changed linking order, so precompiled libraries can use the Arduino code functions.
* Added 'compiler.libraries.ldflags', reverted object order in previous commit

Minor optimization in shiftOut function

Cast pins to signed integers to avoid Wtype-limits compile warning

Do not claim AT-protocol in CDC interface descriptor

Correct yunmini.bootloader.file on boards.txt

[TWI] Add __attribute__ ((fallthrough)) to remove recent GCC warnings

Add `bitToggle` macro to complement `bitSet` etc

Add placement new operator

Add parameter names to common prototypes

Adding parenthesis around 'bitvalue' allowing correct macro expansion when using with ternary operator such as bitWrite(value, bit, some_computed_value == 5 ? 1: 0);'

Fix unused variable warning for non-pluggable USB in SendDescriptor

Removes unnecessary if branch (because length is checked in while statement below the if-clause).

checking `length` in below while statement