102 lines
3.4 KiB
Racket
102 lines
3.4 KiB
Racket
#lang typed/racket/base
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(require "lexical-structs.rkt")
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(provide (all-defined-out))
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;; Expressions
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(define-type Expression (U Top Constant
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ToplevelRef LocalRef
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ToplevelSet
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Branch CaseLam Lam Seq Splice App
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Let1
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LetVoid
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LetRec
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InstallValue
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BoxEnv
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WithContMark
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ApplyValues
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DefValues))
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(define-struct: Top ([prefix : Prefix]
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[code : Expression]) #:transparent)
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(define-struct: Constant ([v : Any]) #:transparent)
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(define-struct: ToplevelRef ([depth : Natural]
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[pos : Natural]) #:transparent)
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(define-struct: LocalRef ([depth : Natural]
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[unbox? : Boolean]) #:transparent)
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(define-struct: ToplevelSet ([depth : Natural]
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[pos : Natural]
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[name : Symbol]
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[value : Expression]) #:transparent)
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(define-struct: Branch ([predicate : Expression]
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[consequent : Expression]
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[alternative : Expression]) #:transparent)
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(define-struct: CaseLam ([name : (U Symbol False)]
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[clauses : (Listof Lam)]
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[entry-label : Symbol]) #:transparent)
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(define-struct: Lam ([name : (U Symbol False)]
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[num-parameters : Natural]
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[rest? : Boolean]
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[body : Expression]
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[closure-map : (Listof Natural)]
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[entry-label : Symbol]) #:transparent)
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(define-struct: Seq ([actions : (Listof Expression)]) #:transparent)
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(define-struct: Splice ([actions : (Listof Expression)]) #:transparent)
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(define-struct: App ([operator : Expression]
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[operands : (Listof Expression)]) #:transparent)
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(define-struct: Let1 ([rhs : Expression]
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[body : Expression]) #:transparent)
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(define-struct: LetVoid ([count : Natural]
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[body : Expression]
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[boxes? : Boolean]) #:transparent)
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(define-struct: LetRec ([procs : (Listof Lam)]
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[body : Expression]) #:transparent)
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(define-struct: InstallValue ([count : Natural] ;; how many values to install
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[depth : Natural] ;; how many slots to skip
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[body : Expression]
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[box? : Boolean]) #:transparent)
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(define-struct: BoxEnv ([depth : Natural]
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[body : Expression]) #:transparent)
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(define-struct: WithContMark ([key : Expression]
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[value : Expression]
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[body : Expression]) #:transparent)
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(define-struct: ApplyValues ([proc : Expression]
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[args-expr : Expression]) #:transparent)
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;; Multiple value definition
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(define-struct: DefValues ([ids : (Listof ToplevelRef)]
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[rhs : Expression]) #:transparent)
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(: last-exp? ((Listof Expression) -> Boolean))
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(define (last-exp? seq)
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(null? (cdr seq)))
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(: first-exp ((Listof Expression) -> Expression))
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(define (first-exp seq) (car seq))
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(: rest-exps ((Listof Expression) -> (Listof Expression)))
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(define (rest-exps seq) (cdr seq))
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