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Solidity
Solidity : Compiler version not fixed
Overview
Solidity source files indicate the versions of the compiler they can be compiled with.
pragma solidity ^0.4.17; // bad: compiles w 0.4.17 and above
pragma solidity 0.4.24; // good : compiles w 0.4.24 only
It is recommended to follow the latter example, as future compiler versions may handle certain language constructions in a way the developer did not foresee.
References
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See also
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