Joseph Ferano
943561e765
spec-memory.md drops (set (get m k) v) from the assignable forms: a map has an upsert of its own, put, which either inserts or replaces, so there is no store into a lookup - and an absent entry has no location to store into anyway. The compiler still parsed it into an Ast.Pkey and refused it downstream as unimplemented, milestone 6, which is the wrong reason for something that is never arriving. The place form is gone from ast, tast, load, check and emit, and the parser refuses the shape where it is written, with the reason and a pointer to put.