Could anyone link me to any solidity reference where explained

Question

Could anyone link me to any solidity reference where explained

that next code compiled successfully? Here coder use ternary operation to choose function that should be called with follow parameters.

(request.tokenOut == _mainToken ? LinearMath._calcMainOutPerBptIn : LinearMath._calcWrappedOutPerBptIn)(
request.amount,
balances[_mainIndex],
balances[_wrappedIndex],
_getApproximateVirtualSupply(balances[_bptIndex]),
params
);
https://github.com/balancer-labs/balancer-v2-monorepo/blob/master/pkg/pool-linear/contracts/LinearPool.sol#L276-L282

#english #programming #solidity

0

31.01.2022

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Nick · Answer 1

found extra example library MathLib { function _a(uint256 val) internal pure returns (uint256 res){ res = val * 2; } function _b(uint256 val) internal pure returns (uint256 res){ res = val / 2; } function _c(uint256 val) internal pure returns ( function(uint256) returns (uint256) ){ if(val == 100) return _a; return _b; } } Does anyone have reference for documentation where explained that function can returns another function?

Nick · Answer 2

Nick Автор вопроса

Nick
found extra example library MathLib { function...

found docs for "function type". If anyone intrested in callbacks https://docs.soliditylang.org/en/latest/types.html#function-types

0

31.01.2022

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Could anyone link me to any solidity reference where explained

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