typescript - How to declare two unassignable types? -


i have ffi binding , there couple of places void * used. i'd differentiate on typescript side. is:

interface struct1ptr extends buffer {}; interface struct2ptr extends buffer {}; var x: struct1ptr; var y: struct2ptr;

i'd make types unassignable, error signaled when try assign x = y or y = x or use wrong type arguments functions.

typescript uses structural typing everything, have make them structurally different, e.g :

interface struct1ptr extends buffer { _isstruct1: void }; interface struct2ptr extends buffer { _isstruct2: void }; var x: struct1ptr; var y: struct2ptr;

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