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-== Goal
-
-A memory-safe language with a simple translator to x86 that can be feasibly written in x86.
-
-== Definitions of terms
-
-Memory-safe: it should be impossible to:
-  a) create a pointer out of arbitrary data, or
-  b) to access heap memory after it's been freed.
-
-Simple: do all the work in a 2-pass translator:
-  Pass 1: check each instruction's types in isolation.
-  Pass 2: emit code for each instruction in isolation.
-
-== types
-
-int
-char
-(address _ stack|heap|global)
-(array _ n)  # on stack or global
-(ref _)
-(ref array _)  # by definition always on the heap
-
-addresses to global can be saved and manipulated as usual
-addresses on stack can't be saved to heap
-addresses on heap can't be saved to global (use ref)
-
-addresses to stack or heap can't be included in compound types
-  or used across a call
-  or used across a label
-
-<reg x> : (address T stack|global) <- advance <reg/mem> : (array T), <reg offset> : (index T)
-<reg x> : (address T heap) <- advance *<mem> : (ref array T), <reg offset> : (index T)
-
-arrays require a size
-(ref array _) may not include a size
-
-Arguments of type 'address' are required to be on the stack or global. Can't
-be on the heap.
-
-So we need duplication for address and ref arguments?
-
-Argv has type (array (address (array char) global))
-
-variables on stack, heap and global are references. The name points at the
-address. Use '*' to get at the value.