174 lines
5.0 KiB
Racket
174 lines
5.0 KiB
Racket
#lang typed/racket/base
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(provide (all-defined-out))
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(require "il-structs.rkt"
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"lexical-structs.rkt")
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(define-type PrimitiveValue (Rec PrimitiveValue (U String Number Symbol Boolean
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Null VoidValue
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undefined
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primitive-proc
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closure
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(Vectorof PrimitiveValue)
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MutablePair
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ContinuationMarkSet
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)))
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(define-type SlotValue (U PrimitiveValue
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(Boxof PrimitiveValue)
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toplevel
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CapturedControl
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CapturedEnvironment))
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(define-struct: VoidValue () #:transparent)
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(define the-void-value (make-VoidValue))
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(define-struct: MutablePair ([h : PrimitiveValue]
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[t : PrimitiveValue])
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#:mutable #:transparent)
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;; For continuation capture:
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(define-struct: CapturedControl ([frames : (Listof frame)]))
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(define-struct: CapturedEnvironment ([vals : (Listof SlotValue)]))
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(define-struct: machine ([val : SlotValue]
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[proc : SlotValue]
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[argcount : SlotValue]
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[env : (Listof SlotValue)]
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[control : (Listof frame)]
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[pc : Natural] ;; program counter
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[text : (Vectorof Statement)] ;; text of the program
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;; other metrics for debugging
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[stack-size : Natural]
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;; compute position from label
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[jump-table : (HashTable Symbol Natural)]
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)
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#:transparent
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#:mutable)
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(define-type frame (U GenericFrame CallFrame PromptFrame))
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(define-struct: GenericFrame ([temps : (HashTable Symbol PrimitiveValue)]
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[marks : (HashTable PrimitiveValue PrimitiveValue)])
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#:transparent)
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(define-struct: CallFrame ([return : LinkedLabel]
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;; The procedure being called. Used to optimize self-application
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[proc : (U closure #f)]
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;; TODO: add continuation marks
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[temps : (HashTable Symbol PrimitiveValue)]
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[marks : (HashTable PrimitiveValue PrimitiveValue)])
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#:transparent
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#:mutable) ;; mutable because we want to allow mutation of proc.
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(define-struct: PromptFrame ([tag : ContinuationPromptTagValue]
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[return : LinkedLabel]
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[env-depth : Natural]
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[temps : (HashTable Symbol PrimitiveValue)]
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[marks : (HashTable PrimitiveValue PrimitiveValue)])
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#:transparent)
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(: frame-temps (frame -> (HashTable Symbol PrimitiveValue)))
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(define (frame-temps a-frame)
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(cond
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[(GenericFrame? a-frame)
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(GenericFrame-temps a-frame)]
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[(CallFrame? a-frame)
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(CallFrame-temps a-frame)]
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[(PromptFrame? a-frame)
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(PromptFrame-temps a-frame)]))
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(: frame-marks (frame -> (HashTable PrimitiveValue PrimitiveValue)))
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(define (frame-marks a-frame)
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(cond
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[(GenericFrame? a-frame)
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(GenericFrame-marks a-frame)]
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[(CallFrame? a-frame)
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(CallFrame-marks a-frame)]
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[(PromptFrame? a-frame)
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(PromptFrame-marks a-frame)]))
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(: frame-tag (frame -> (U ContinuationPromptTagValue #f)))
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(define (frame-tag a-frame)
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(cond
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[(GenericFrame? a-frame)
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#f]
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[(CallFrame? a-frame)
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#f]
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[(PromptFrame? a-frame)
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(PromptFrame-tag a-frame)]))
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(define-struct: ContinuationPromptTagValue ([name : Symbol])
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#:transparent)
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(define default-continuation-prompt-tag-value
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(make-ContinuationPromptTagValue 'default-continuation-prompt))
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(define-struct: ContinuationMarkSet ([marks : (Listof (Pairof PrimitiveValue PrimitiveValue))])
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#:transparent)
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(define-struct: toplevel ([names : (Listof (U #f Symbol ModuleVariable))]
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[vals : (Listof PrimitiveValue)])
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#:transparent
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#:mutable)
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;; Primitive procedure wrapper
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(define-struct: primitive-proc ([f : (machine PrimitiveValue * -> PrimitiveValue)]
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[arity : Arity]
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[display-name : (U Symbol False)])
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#:transparent)
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;; Compiled procedure closures
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(define-struct: closure ([label : Symbol]
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[arity : Arity]
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[vals : (Listof SlotValue)]
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[display-name : (U Symbol False)])
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#:transparent
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#:mutable)
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;; undefined value
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(define-struct: undefined ()
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#:transparent)
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(define-predicate PrimitiveValue? PrimitiveValue)
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(define-predicate frame? frame) |