Merge pull request #3 from cmsc430/crook

Add Iniquity+ starter code

iniquity-plus/ast.rkt

@@ -0,0 +1,65 @@
+#lang racket
+(provide Lit Prim0 Prim1 Prim2 Prim3 If Eof Begin
+         Let Var Prog Defn App
+         Apply FunPlain FunRest FunCase)
+
+;; type Prog = (Prog (Listof Defn) Expr)
+(struct Prog (ds e) #:prefab)
+
+;; type Defn = (Defn Id Fun)
+(struct Defn (f fun) #:prefab)
+
+;; type Fun = (FunPlain [Listof Id] Expr)
+;;          | (FunRest [Listof Id] Id Expr)
+;;          | (FunCase [Listof FunCaseClause])
+;; type FunCaseClause = (FunPlain [Listof Id] Expr)
+;;                    | (FunRest [Listof Id] Id Expr)
+(struct FunPlain (xs e)   #:prefab)
+(struct FunRest  (xs x e) #:prefab)
+(struct FunCase  (cs)     #:prefab)
+;; type Expr = (Lit Datum)
+;;           | (Eof)
+;;           | (Prim0 Op0)
+;;           | (Prim1 Op1 Expr)
+;;           | (Prim2 Op2 Expr Expr)
+;;           | (Prim3 Op3 Expr Expr Expr)
+;;           | (If Expr Expr Expr)
+;;           | (Begin Expr Expr)
+;;           | (Let Id Expr Expr)
+;;           | (Var Id)
+;;           | (App Id (Listof Expr))
+;;           | (Apply Id (Listof Expr) Expr)
+
+;; type Id  = Symbol
+;; type Datum = Integer
+;;            | Boolean
+;;            | Character
+;;            | String
+;; type Op0 = 'read-byte | 'peek-byte | 'void
+;; type Op1 = 'add1 | 'sub1
+;;          | 'zero?
+;;          | 'char? | 'integer->char | 'char->integer
+;;          | 'write-byte | 'eof-object?
+;;          | 'box | 'car | 'cdr | 'unbox
+;;          | 'empty? | 'cons? | 'box?
+;;          | 'vector? | 'vector-length
+;;          | 'string? | 'string-length
+;; type Op2 = '+ | '- | '< | '=
+;;          | 'eq? | 'cons
+;;          | 'make-vector | 'vector-ref
+;;          | 'make-string | 'string-ref
+;; type Op3 = 'vector-set!
+
+(struct Eof () #:prefab)
+(struct Lit (d) #:prefab)
+(struct Prim0 (p) #:prefab)
+(struct Prim1 (p e) #:prefab)
+(struct Prim2 (p e1 e2)  #:prefab)
+(struct Prim3 (p e1 e2 e3)  #:prefab)
+(struct If (e1 e2 e3) #:prefab)
+(struct Begin (e1 e2) #:prefab)
+(struct Let (x e1 e2) #:prefab)
+(struct Var (x) #:prefab)
+(struct App (f es) #:prefab)
+(struct Apply (f es e) #:prefab)
+

iniquity-plus/build-runtime.rkt

@@ -0,0 +1,14 @@
+#lang racket
+(provide runtime-path)
+
+(require racket/runtime-path)
+(define-runtime-path here ".")
+
+(unless (system (string-append "make -C '"
+                               (path->string (normalize-path here))
+                               "' -s runtime.o"))
+  (error 'build-runtime "could not build runtime"))
+
+(define runtime-path
+  (normalize-path (build-path here "runtime.o")))
+