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chriseth 2020-12-03 11:32:38 +01:00
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docs/080-breaking-changes.rst
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@ -19,6 +19,17 @@ the compiler notifying you about it.
Checks for overflow are very common, so we made them the default to increase readability of code, Checks for overflow are very common, so we made them the default to increase readability of code,
even if it comes at a slight increase of gas costs. even if it comes at a slight increase of gas costs.
* ABI coder v2 is activated by default.
You can choose to use the old behaviour using ``pragma abicoder v1;``.
The pragma ``pragma experimental ABIEncoderV2;`` is still valid, but it is deprecated and has no effect.
If you want to be explicit, please use ``pragma abicoder v2;`` instead.
Note that ABI coder v2 supports more types than v1 and performs more sanity checks on the inputs.
ABI coder v2 makes some function calls more expensive and it can also make contract calls
revert that did not revert with ABI coder v1 when they contain data that does not conform to the
parameter types.
* Exponentiation is right associative, i.e., the expression ``a**b**c`` is parsed as ``a**(b**c)``. * Exponentiation is right associative, i.e., the expression ``a**b**c`` is parsed as ``a**(b**c)``.
Before 0.8.0, it was parsed as ``(a**b)**c``. Before 0.8.0, it was parsed as ``(a**b)**c``.