the sizeof operator should accept any expression

[chqrlie]

sizeof currently only accepts a restricted set of arguments: builtin types, identifiers and member expressions (referring to types or variables). Allowing more general expressions is necessary to implement safer allocation and copy idioms:

    MyType *p;
    [...]
    p = malloc(length, sizeof(*p));

similarly:

    string.memset(array, 0, length * sizeof(*array));