Add procedural API #95
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This change introduces three new convenience functions that allow code using SumType to be written in a more procedural style (as opposed to the functional style of match). * has!T checks whether a SumType contains a value of type T. * get!T accesses a SumType's value if it has type T, or asserts if it does not. * tryGet!T is like get!T, but throws an exception instead of asserting on failure. To make room for get!T, the existing SumType.get method is renamed to getByIndex. Frontend requirement is bumped to 2.103 for __traits(fullyQualifiedName). Phobos PR: dlang/phobos#10650
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This PR introduces three new convenience functions that allow code using
SumTypeto be written in a more procedural style (as opposed to the functional style ofmatch).has!Tchecks whether aSumTypecontains a value of typeT.get!Taccesses aSumType's value if it has typeT, or asserts if it does not.tryGet!Tis likeget!T, but throws an exception instead of asserting on failure.To make room for
get!T, the existingSumType.getmethod is renamed togetByIndex.Phobos PR: dlang/phobos#10650