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Diffstat (limited to 'apps/mu.subx')
| -rw-r--r-- | apps/mu.subx | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/apps/mu.subx b/apps/mu.subx index b64ac6c2..bb6cd195 100644 --- a/apps/mu.subx +++ b/apps/mu.subx @@ -4,6 +4,7 @@ # To run: # $ ./ntranslate init.linux 0*.subx apps/mu.subx +# A sketch of planned data structures. Still highly speculative. == data # A program is currently a linked list of functions @@ -21,6 +22,52 @@ Function-next: Function-size: 0x14/imm32/20 +# A block is a list of statements: +# statements: (address statement) + +# A statement can be either a regular statement consisting of: +# name: (address string) +# inputs: (address var) +# outputs: (address var-r) +# or a variable declaration on the stack: +# name: (address string) +# type: (address type-sexpr) +# or a regular statement writing to a single new variable in a register: +# name: (address string) +# inputs: (address var) +# output: var-r +# or a block of statements: +# statements: (address statement) + +# Kinds of local variable declarations: +# var f : (array foo 10) +# var f/ecx : int <- copy 0 +# Variables live in either the stack or a register. +# Variables in the stack are auto-initialized. +# (This is non-trivial for arrays, and arrays inside structs... We'll see.) +# Variables in register need a real instruction. + +# var is a variable declaration. e.g. `foo: (array int 3)` +# name: (address string) +# type: (address type-sexpr) + +# var-r is a variable declaration in a register. e.g. `foo/eax: (array int 3)` +# name: (address string) +# type: (address type-sexpr) +# reg: int [0..7] + +# type-sexpr is a tree of type identifiers. e.g. (array (address int) 3) +# either +# id: type-identifier +# or +# car: (address type-sexpr) +# cdr: (address type-sexpr) + +# Still todo: +# heap allocations (planned name: 'handle') +# user-defined types: 'type' for structs, 'choice' for unions +# short-lived 'address' type for efficiently writing inside nested structs + == code Entry: |