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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 _)
-(array _ n)
-(ref _)
-
-== implications
-
-addresses can't be saved to stack or global,
-      or included in compound types
-      or used across a call (to eliminate possibility of free)
-
-<reg x> : (address T) <- advance <reg/mem> : (array T), <reg offset> : (index T)
-
-arrays require a size
-(ref array _) may not include a size
-
-argv has type (array (ref array char))
-
-variables on stack, heap and global are references. The name points at the
-address. Use '*' to get at the value.
-
-instructions performing lookups write to register, so that we can reuse the register for temporaries
-instructions performing lookups can't read from the register they write to.
-  But most instructions read from the register they write to?! (in-out params)
-
-== open questions
-
-If bounds checks can take multiple instructions, why not perform array
-indexing in a single statement in the language?
-
-But we want addresses as intermediate points to combine instructions with.
-
-Maybe disallow addresses to function calls, but allow addresses to non-heap
-structures to be used spanning function calls and labels.
-
-That's just for ergonomics. Doesn't add new capability.