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toccata.toc
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;; TODO:
;; implement lazy 'or', 'and'
;; refactor calls to 'match'
;; get rid of calls to '(zero sm/state-maybe)'
;; use #line directive
;; make 'match' efficient
;; memoize call-sites with static args
;; get rid of TODO's
;; implement dissoc
;; implement definitions that require initialization at start time.
;; supercompilation
;; better error messages
;; implement to-be-freed lists
;; problem in multi-arity defn when one arity has no args
;; test memory exhaustion handling
;; implements?
;; REPL
;; fn meta data; doc strings and ast
;; macro system
;; destructuring of maps and deftypes
;; destructuring in let bindings
;; green threads
;; async
;; dependencies
;; persistent data structures; vectors, hash-sets
;; FFI
;; Android/iOS
;; native arrays
;; linear algebra
;; compact lists cdr coding
;; Optimization hints:
;; eliminate closed-over syms from flat-map, wrap impls
(add-ns sm (module "core/state-maybe.toc"))
(add-ns fr (module "core/free.toc"))
(add-ns parser (module "core/parser.toc"))
(add-ns grmr (module "core/grammar.toc"))
(add-ns an (module "core/analyzer.toc"))
(add-ns ast (module "core/ast.toc"))
(def StringType (inline-text Number "(Value *)&(Number){NumberType, -1, StringType};"))
(def NumberType (inline-text Number "(Value *)&(Number){NumberType, -1, NumberType};"))
(def FunctionType (inline-text Number "(Value *)&(Number){NumberType, -1, FunctionType};"))
(def ListType (inline-text Number "(Value *)&(Number){NumberType, -1, ListType};"))
(def KeywordType (inline-text Number "(Value *)&(Number){NumberType, -1, KeywordType};"))
(def SubStringType (inline-text Number "(Value *)&(Number){NumberType, -1, SubStringType};"))
(def SymbolType (inline-text Number "(Value *)&(Number){NumberType, -1, SymbolType};"))
(def FnArityType (inline-text Number "(Value *)&(Number){NumberType, -1, FnArityType};"))
(def OpaqueType (inline-text Number "(Value *)&(Number){NumberType, -1, OpaqueType};"))
(def BitmapIndexedType (inline-text Number "(Value *)&(Number){NumberType, -1, BitmapIndexedType};"))
(def ArrayNodeType (inline-text Number "(Value *)&(Number){NumberType, -1, ArrayNodeType};"))
(def HashCollisionNodeType (inline-text Number "(Value *)&(Number){NumberType, -1, HashCollisionNodeType};"))
(defn debug [& args]
(comp (for [debugging (sm/get-val :debug-on)]
(apply print-err args))
(sm/state-maybe "")))
(defn index [coll]
(let [coll (seq coll)]
(zip-lists (range (count coll)) coll)))
(deftype c-code [c-val init decl type-num]
Stringable
(string-list [_]
(list "<C-Code " (str c-val) ", " (str type-num) ">"))
Monoid
(zero [_] (c-code "" empty-list empty-list :no-type))
(comp* [c cs]
(reduce cs c
(fn [result expr]
(c-code (.c-val expr)
(comp (.init result) (.init expr))
(comp (.decl result) (.decl expr))
(.type-num expr))))))
(defn write-strs [str-lists]
(map (sm/state-maybe str-lists)
(fn [str-list]
(map str-list print))))
(defn genlocal [pre]
(for [sym-count (sm/get-val :local-sym-count)
_ (sm/set-val :local-sym-count (inc sym-count))]
(symbol (str pre sym-count))))
(defprotocol Emitter
(emit-c [ast]))
(extend-type Function
Emitter
(emit-c [f] (sm/state-maybe f)))
(extend-type ast/inline-ast
Emitter
(emit-c [ast]
(for [type (sm/get-in-val (list :types (.result-type ast)) :no-type)]
(c-code "" (list (.txt ast)) empty-list type))))
(defn already-closed-over [closed-over sym]
(sm/when (some closed-over (fn [[c-sym sym-literal]]
(for [_ (= sym sym-literal)]
c-sym)))))
(defn new-closure [sym]
(for [closure-sym (genlocal "val")
_ (sm/update-in-val (list :closed-over)
(partial cons (list closure-sym sym)))]
closure-sym))
(defn closed-over-sym [sym]
(for [;; it's supposed to fail if 'sym' is not in the context
sym-val (sm/get-in-val (list :context sym))
;; if 'sym' is in the context, it should be in :closed-over
closed-over (sm/get-val :closed-over)
closure-sym (comp (already-closed-over closed-over sym)
(new-closure sym))]
(c-code closure-sym empty-list empty-list (.type-num sym-val))))
(defn lookup-static-arity [target-sym num-args]
(sm/get-in-val (list :static-fns target-sym num-args :c-code)))
(defn lookup-proto-arity [name num-args type-num]
(for [qualified-name (sm/get-in-val (list :defined-protos name))
proto-fn (sm/get-in-val (list :protocols qualified-name :impl-arities
num-args type-num :fn-sym))
arity-info (lookup-static-arity proto-fn num-args)]
arity-info))
;; A symbol can be a local, from the context, from the dictionary, or
;; a getter
(defn lookup-sym [sym]
(comp (sm/get-in-val (list :local-syms sym))
(closed-over-sym sym)
(sm/get-in-val (list :defined-syms sym))
(for [disp-sym (sm/get-in-val (list :protocols (str "Getter/" sym) :dispatch-sym))]
(c-code disp-sym empty-list empty-list FunctionType))))
(defn lookup-fn-arity [sym num-args]
(for [fn-sym (lookup-sym sym)
arity-sym (lookup-static-arity (.c-val fn-sym) num-args)]
(.c-val arity-sym)))
;; TODO; try to get rid of this fn
(defn lookup-static-return-type [target-sym num-args]
(comp (for [arity-info (lookup-static-arity target-sym num-args)]
(.type-num arity-info))
(sm/state-maybe :no-type)))
(extend-type ast/symbol-ast
Emitter
(emit-c [ast]
(comp (lookup-sym (.sym ast))
(for [file-name (sm/get-val :file-name)
line-num (sm/get-val :line-num)]
(let [_ (print-err "Undefined symbol:" (.sym ast) "at" file-name ":" line-num)]
(abort))))))
(defn make-static-string [str-val]
(let [str-len (count str-val)]
(for [str-idx (sm/get-val :str-count)
_ (sm/set-val :str-count (inc str-idx))
:let [str-sym (str "str" str-idx)
str-ptr (str "strPtr" str-idx)]
_ (sm/assoc-in-val (list :static-strings str-val)
(c-code str-ptr empty-list empty-list StringType))]
(c-code str-ptr
empty-list
(list "struct {int64_t type;\n int32_t refs;\n int64_t len;\n char buffer["
(inc str-len)
"];} " str-sym " = {StringType, -1, "
str-len ",\"" (escape-chars str-val) "\"};\n"
"Value *" str-ptr " = (Value *)&" str-sym ";\n")
StringType))))
(extend-type ast/const-string-ast
Emitter
(emit-c [ast]
(comp (sm/get-in-val (list :static-strings (.const-str ast)))
(make-static-string (.const-str ast)))))
(defn make-static-num [num]
(for [num-idx (sm/get-val :num-count)
_ (sm/set-val :num-count (inc num-idx))
:let [num-sym (str "num" num-idx)
num-ptr (str "numPtr" num-idx)]
_ (sm/assoc-in-val (list :numbers num)
(c-code num-ptr empty-list empty-list NumberType))]
(c-code num-ptr
empty-list
(list "Number " num-sym " = {NumberType, -1, " num "};\n"
"Value *" num-ptr " = (Value *)&" num-sym ";\n")
NumberType)))
(extend-type ast/const-number-ast
Emitter
(emit-c [ast]
(let [num (.num ast)]
(comp (sm/get-in-val (list :numbers num))
(make-static-num num)))))
(defn make-static-kw [kw]
(for [kw-idx (sm/get-val :kw-count)
_ (sm/set-val :kw-count (inc kw-idx))
:let [kw-sym (str "kw" kw-idx)
kw-ptr (str "kwPtr" kw-idx)]
_ (sm/assoc-in-val (list :keywords kw)
(c-code kw-ptr empty-list empty-list KeywordType))]
(c-code kw-ptr
empty-list
(list "SubString " kw-sym " = {KeywordType, -1, " (count (str kw)) ", 0, 0, \"" kw "\"};\n"
"Value *" kw-ptr " = (Value *)&" kw-sym ";\n")
KeywordType)))
(extend-type ast/keyword-ast
Emitter
(emit-c [ast]
(let [kw (.kw ast)]
(comp (sm/get-in-val (list :keywords kw))
(make-static-kw kw)))))
(extend-type ast/quoted-ast
Emitter
(emit-c [ast]
(let [sym (.q-val ast)]
(comp (sm/get-in-val (list :symbols sym))
(for [sym-idx (sm/get-val :sym-count)
_ (sm/set-val :sym-count (inc sym-idx))
:let [sym-sym (str "sym" sym-idx)
sym-ptr (str "symPtr" sym-idx)]
_ (sm/assoc-in-val (list :symbols sym)
(c-code sym-ptr empty-list empty-list KeywordType))]
(c-code sym-ptr
empty-list
(list "SubString " sym-sym " = {SymbolType, -1, " (count (str sym))
", 0, 0, \"" sym "\"};\n"
"Value *" sym-ptr " = (Value *)&" sym-sym ";\n")
SymbolType))))))
(defn update-startup-init [init-list]
(comp (for [_ (sm/when-not (list-empty? init-list))
start-up-init (sm/get-val :startup-init)
_ (sm/set-val :startup-init (cons init-list start-up-init))]
"")
(sm/state-maybe "")))
(defn define-inline-text-value [name evalled-expr]
(for [_ (sm/when (= (.c-val evalled-expr) ""))
c-name (comp (for [def (sm/get-in-val (list :defined-syms name))]
;; for a declared symbol
(.c-val def))
(for [c-name (sm/state-maybe (gensym "var_"))]
;; for a newly defined symbol
c-name))
_ (write-strs (list "Value *" c-name " = "
(first (.init evalled-expr)) ";\n"))]
(c-code c-name empty-list empty-list (.type-num evalled-expr))))
(defn declared-immediate-init [name evalled-expr]
(for [def (sm/get-in-val (list :defined-syms name))
:when (= (.c-val def) (.c-val evalled-expr))
_ (update-startup-init (.init evalled-expr))]
(c-code (.c-val def) empty-list empty-list (.type-num evalled-expr))))
(defn declared-startup-init [name evalled-expr]
(for [def (sm/get-in-val (list :defined-syms name))
_ (update-startup-init (comp (.init evalled-expr)
(list (.c-val def) " = "
(.c-val evalled-expr) ";\n")))]
(c-code (.c-val def) empty-list empty-list (.type-num evalled-expr))))
(defn define-declared-symbol [defined-sym evalled-expr]
(comp (declared-immediate-init defined-sym evalled-expr)
(declared-startup-init defined-sym evalled-expr)))
(defn define-value [evalled-expr]
(for [_ (update-startup-init (.init evalled-expr))]
(c-code (.c-val evalled-expr) empty-list empty-list (.type-num evalled-expr))))
(extend-type ast/definition-ast
Emitter
(emit-c [ast]
(let [defined-sym (.name ast)]
(for [evalled-expr (fr/evaluate (.value ast) emit-c)
_ (write-strs (.decl evalled-expr))
value (comp (define-inline-text-value defined-sym evalled-expr)
(define-declared-symbol defined-sym evalled-expr)
(define-value evalled-expr))
file-name (sm/get-val :file-name)
_ (sm/assoc-in-val (list :modules file-name :syms defined-sym) value)
_ (sm/assoc-in-val (list :defined-syms defined-sym) value)]
(c-code "" empty-list empty-list :no-type)))))
(extend-type ast/declaration-ast
Emitter
(emit-c [ast]
(let [c-name (gensym "var_")
name (.name ast)
def (c-code c-name empty-list empty-list :no-type)]
(for [_ (write-strs (list "// forward declaration for '" name "'\n"
"Value *" c-name ";\n\n"))
_ (sm/assoc-in-val (list :defined-syms name) def)]
def))))
(defn emit-proto-default [proto-name [num-args impl-map]]
(comp (for [default-impl (sm/when (m-get impl-map :default))
default-fn (fr/evaluate default-impl emit-c)
_ (write-strs (.decl default-fn))
;; '0' is the 'default' type.
_ (sm/assoc-in-val (list :protocols proto-name :impl-arities num-args 0 :arity-sym)
(.c-val default-fn))]
default-fn)
(sm/assoc-in-val (list :protocols proto-name :impl-arities num-args) {})))
(defn declare-proto-dispatch-arity [proto-name dispatch-fn-sym [num-args]]
(let [proto-arity-sym (gensym "protoDisp_")
impls-sym (gensym "protoImpls_")]
(for [_ (sm/assoc-in-val (list :protocols proto-name :impls-syms num-args) impls-sym)
_ (sm/assoc-in-val (list :static-fns dispatch-fn-sym num-args :c-code)
(c-code proto-arity-sym empty-list empty-list :no-type))
_ (write-strs (list "ProtoImpls " impls-sym ";\n"))
_ (write-strs (list "Value *" proto-arity-sym "("))
_ (write-strs (interpose (cons "List *closures"
(map (range num-args)
(fn [n]
(str "Value *arg" n))))
", "))
_ (write-strs (list ");\n"))]
"")))
(extend-type ast/protocol-ast
Emitter
(emit-c [ast]
(for [file-name (sm/get-val :file-name)
:let [protocol-name (match file-name
"" (str (.protocol-name ast) "/")
(str file-name "/" (.protocol-name ast) "/"))]
curr-fn-sym (sm/get-val :curr-fn-sym)
curr-fn-ptr (sm/get-val :curr-fn-ptr)
_ (sm/set-val :curr-fn-sym :no-fn)
_ (sm/set-val :curr-fn-ptr :no-fn-ptr)
_ (sm/traverse (seq (.prototypes ast))
(fn [[name arities]]
(let [dispatch-fn-sym (gensym "dispatchFnPtr_")
qualified-name (str protocol-name name)
dispatch-c-code (c-code dispatch-fn-sym empty-list
empty-list FunctionType)]
(for [_ (write-strs (list "\n// proto fn for " qualified-name "\n"
"Value *" dispatch-fn-sym ";\n"))
_ (sm/assoc-in-val (list :modules file-name :protos name) qualified-name)
_ (sm/assoc-in-val (list :modules file-name :syms name) dispatch-c-code)
_ (sm/assoc-in-val (list :protocols qualified-name :dispatch-sym)
dispatch-fn-sym)
_ (sm/assoc-in-val (list :defined-protos name) qualified-name)
_ (sm/assoc-in-val (list :defined-syms name) dispatch-c-code)
_ (sm/traverse (seq arities)
(partial declare-proto-dispatch-arity
qualified-name dispatch-fn-sym))
_ (sm/traverse (seq arities)
(partial emit-proto-default qualified-name))]
""))))
_ (sm/set-val :curr-fn-sym curr-fn-sym)
_ (sm/set-val :curr-fn-ptr curr-fn-ptr)]
;; prototype definitions are top level
(c-code "" empty-list empty-list :no-type))))
(defn begin-scope []
(for [scope-locals (sm/get-val :scope-locals)
_ (sm/set-val :scope-locals {})]
scope-locals))
(defn end-scope [scope-info]
(sm/set-val :scope-locals scope-info))
(defn remember-local [sym]
(sm/assoc-in-val (list :scope-locals (str sym))
(str "dec_and_free(" sym ");\n")))
(defn free-scope-locals [result-sym]
(for [scope-locals (sm/get-val :scope-locals)]
(let [locals (seq scope-locals)]
;; TODO: getting closer. Still needs work
(match (or (and (= result-sym "")
(maybe locals))
(and (= 1 (count locals))
(for [[local _] (m-first locals)
_ (= (str result-sym) local)]
empty-list)))
|maybe locals| (map locals second)
(list* "incRef(" result-sym ");\n" (map locals second))))))
(defn emit-reified-fn [type-num [protocol-name name ast]]
(let [fn-ptr (gensym "protoFnPtr_")
num-args (count (.args (.v ast)))]
(for [_ (sm/set-val :curr-fn-ptr fn-ptr)
_ (sm/set-val :curr-fn-sym :no-fn)
evalled (fr/evaluate ast emit-c)
;; TODO: blow up if 'protocol-name' or 'name' is not valid
;; qualified-name (sm/get-in-val (list :defined-protos name))
;; _ (debug :reifying protocol-name type-num name (type-name name) qualified-name)
;; is the refied fn impl a closure or not?
_ (comp
;; no, it's not a closure
(for [_ (sm/when (list-empty? (.init evalled)))
proto-fn-name (sm/get-in-val (list :defined-protos name))
_ (sm/assoc-in-val (list :protocols proto-fn-name :impl-arities
num-args type-num)
{:arity-sym (.c-val evalled)
:fn-sym fn-ptr})]
evalled)
;; yes it's a closure
(let [args (map (range num-args) (partial str "arg"))
arg-decls (apply str (interpose (cons (str "List *closures")
(map args (fn [arg] (str "Value *" arg))))
", "))
args (apply str (interpose (cons "closures" args) ", "))
fn-arity-sym (gensym "protoFnArity_")]
(for [qualified-name (sm/get-in-val (list :defined-protos name))
reify-fn-index (sm/get-val :reify-fn-index)
impl-sym (sm/state-maybe (gensym "protoImpl_"))
_ (sm/assoc-in-val (list :protocols qualified-name :impl-arities num-args type-num)
{:arity-sym (str "&" fn-arity-sym)
:fn-sym fn-ptr})
_ (write-strs (list "// implementation of " protocol-name "\n"
"Value *" impl-sym "(" arg-decls ") {\n"
"FnArity *arityPtr = (FnArity *)((ReifiedVal *)arg0)->impls["
reify-fn-index "];\n"
"Value *rval = ((FnType" num-args
" *)arityPtr->fn)(arityPtr->" args ");\n"
"return(rval);\n"
"};\n\n"
"FnArity " fn-arity-sym " = {FnArityType, -1, " num-args
", (List *)0, 0, " impl-sym "};\n"
"Function " fn-ptr " = {FunctionType, -1, \"" name
"\", 1, {&" fn-arity-sym "}};\n\n"))
return-type (lookup-static-return-type (.c-val evalled) num-args)
_ (sm/assoc-in-val (list :static-fns fn-ptr num-args)
{:c-code (c-code impl-sym empty-list empty-list return-type)
:ast ast})]
evalled)))]
evalled)))
(extend-type ast/reify-ast
Emitter
(emit-c [ast]
(comp
(for [types (sm/get-val :types)
:let [type-num (inc (count types))]
_ (sm/assoc-in-val (list :types type-num) type-num)
reify-fn-index (sm/get-val :reify-fn-index)
_ (sm/set-val :reify-fn-index 0)
curr-fn-ptr (sm/get-val :curr-fn-ptr)
curr-fn-sym (sm/get-val :curr-fn-sym)
:let [impl-arities (for [[proto-name impl-fns] (seq (.impls ast))
[fn-name arities] (seq impl-fns)
impl-arity arities]
(list proto-name fn-name impl-arity))]
impl-fns (sm/traverse impl-arities
(fn [impl-arity]
(for [impl-arity (emit-reified-fn type-num impl-arity)
_ (sm/update-in-val (list :reify-fn-index) inc)]
impl-arity)))
_ (sm/set-val :curr-fn-ptr curr-fn-ptr)
_ (sm/set-val :curr-fn-sym curr-fn-sym)
_ (sm/set-val :reify-fn-index reify-fn-index)
reified-result (let [inits (crush impl-fns .init)]
(comp
(for [reified-sym (genlocal "reifiedDyn_")
:when-not (list-empty? inits)
_ (remember-local reified-sym)]
(let [impls-syms (map impl-fns .c-val)]
(c-code reified-sym
(comp inits
(list "Value *" reified-sym " = (Value *)malloc_reified("
(count impls-syms) ");\n"
"((ReifiedVal *)" reified-sym ")->type = " type-num ";\n"
"((ReifiedVal *)" reified-sym ")->implCount = "
(count impl-fns) ";\n"
"((ReifiedVal *)" reified-sym ")->typeArgs = (Value *)0;\n")
(flat-map (index impls-syms)
(fn [[index sym]]
(list "((ReifiedVal *)" reified-sym
")->impls[" index "] = (Value *)" sym ";\n"))))
(crush impl-fns .decl)
type-num)))
(let [reified-sym (gensym "reifiedStatic_")
reified-ptr (gensym "reifiedPtr_")
impl-count (count impl-fns)]
(sm/state-maybe
(c-code reified-ptr
empty-list
(comp
(crush impl-fns .decl)
(list "ReifiedVal " reified-sym " = {"
type-num ", -1, (Value *)0, 0, {}};\n"
"Value *" reified-ptr " = (Value *)&" reified-sym ";\n"))
type-num)))))]
reified-result)
(flat-map (debug :booom)
(fn [_]
(abort))))))
(defn declare-getters [fields]
(sm/traverse fields
(fn [field]
(let [getter-name (str "Getter/." field)]
(comp (for [_ (sm/get-in-val (list :protocols getter-name))
_ (sm/assoc-in-val (list :defined-protos (symbol (str "." field)))
getter-name)]
(list (symbol (str "." field))
(list 'vector 'x)
(list 'let
(list (list (comp fields (list :dont-care))
'(type-args x)))
field)))
(let [dispatch-fn-sym (gensym "dispatchFnPtr_")
proto-arity-sym (gensym "protoImpl_")
impls-sym (gensym "protoImpls_")]
(for [_ (sm/assoc-in-val (list :defined-protos (symbol (str "." field)))
getter-name)
_ (sm/assoc-in-val (list :protocols getter-name)
{:dispatch-sym dispatch-fn-sym
:impls-syms {1 impls-sym}
:impl-arities {1 {}}})
_ (write-strs (list "ProtoImpls " impls-sym ";\n"))
_ (write-strs (list "Value *" dispatch-fn-sym ";\n"))
_ (sm/assoc-in-val (list :static-fns dispatch-fn-sym 1 :c-code)
(c-code proto-arity-sym empty-list
empty-list :no-type))
_ (write-strs (list "Value *" proto-arity-sym
"(List *closures, Value *arg);\n"))]
(list (symbol (str "." field))
(list 'vector 'x)
(list 'let
(list (list (comp fields (list :dont-care))
'(type-args x)))
field)))))))))
(defn constructor-expr [new-type-name type-val-num type-val-template fields]
(list 'def new-type-name
(list 'reify
'Stringable
(list 'string-list (list 'vector '_)
(list 'list "<TypeCon " (str new-type-name) " ["
(apply str (interpose fields ", ")) "]>"))
'Type
(list 'instance? (list 'vector '_ 'v)
(list 'instance? type-val-num 'v))
'Applicative
(list 'apply* (list 'vector '_ 'args)
(list 'apply 'invoke '_ 'args))
'Function
(list 'invoke (list* 'vector '_ fields)
(list 'new-type-value type-val-template
(cons 'list fields))))))
(defn build-impls [fields impls]
(map impls
(fn [impl]
(match impl
|List fn-name args & body|
(let [args-map (reduce args {}
(fn [m arg]
(assoc m arg '_)))
fields (map fields (fn [fld] (get args-map fld fld)))]
(list fn-name args
(list* 'let (list (list (comp fields (list :dont-care))
(list 'type-args (second args))))
body)))
impl))))
(defn template-expr [template-sym getters impls]
(list 'def template-sym
(list*
'reify
'Eq
(list '=* (list 'vector 'x 'y)
'(=* (type-args x) (type-args y)))
(comp
getters
impls))))
(extend-type ast/type-ast
Emitter
(emit-c [ast]
(comp
(for [file-name (sm/get-val :file-name)
_ (sm/get-in-val (list :modules file-name :types (.name ast)))]
(let [_ (print-err (str "Trying to re-define type name: '" (.name ast) "' in module '"
file-name "'"))]
(abort)))
(let [new-type-name (.name ast)
fields (.fields ast)]
(for [types (sm/get-val :types)
:let [type-val-num (+ 2 (count types))
type-val-template (gensym "type-val-")]
declare-ast (an/analyze-expr (list 'def type-val-template))
_ (fr/evaluate declare-ast emit-c)
type-ast (an/analyze-expr (constructor-expr new-type-name type-val-num
type-val-template fields))
evalled (fr/evaluate type-ast emit-c)
getters (declare-getters fields)
:let [getters (list* 'Getter
(list 'type-name (list 'vector '_)
(str new-type-name))
getters)
impls (match fields
empty-list (.impls ast)
(build-impls fields (.impls ast)))]
template-ast (an/analyze-expr (template-expr type-val-template getters impls))
evalled-template (fr/evaluate template-ast emit-c)
file-name (sm/get-val :file-name)
_ (sm/assoc-in-val (list :modules file-name :types new-type-name) type-val-num)
_ (sm/assoc-in-val (list :defined-types new-type-name) type-val-num)
_ (sm/assoc-in-val (list :type-names (dec type-val-num)) (str new-type-name))
_ (sm/assoc-in-val (list :types new-type-name) type-val-num)]
evalled)))))
(extend-type ast/extend-ast
Emitter
(emit-c [ast]
(for [type-num (comp (sm/get-in-val (list :defined-types (.type ast)))
(sm/get-in-val (list :types (.type ast)) :no-type))
_ (sm/traverse (for [[_ proto-impls] (seq (.impls ast))
[fn-name arities] (seq proto-impls)
impl-arity arities]
(list fn-name impl-arity))
(fn [[name ast]]
;; TODO: blow up if protocol fn has not been declared yet
(for [ext-fn (fr/evaluate ast emit-c)
_ (write-strs (.decl ext-fn))
proto-fn-name (sm/get-in-val (list :defined-protos name))
_ (sm/assoc-in-val (list :protocols proto-fn-name :impl-arities
(count (.args (.v ast))) type-num :arity-sym)
(.c-val ext-fn))]
"")))]
(c-code "" empty-list "" :no-type))))
(defn eval-exprs [ast]
(for [exprs (fr/evaluate ast emit-c)]
(comp* (c-code "" empty-list empty-list :no-type) exprs)))
(defn unpack-arg-list [list-sym [arg-sym & arg-syms]]
(let [arg (.c-val arg-sym)]
(match (comp (for [_ (= arg "")]
(list ""))
(for [_ (= empty-list arg-syms)]
(list "Value *" arg " = (Value *) " list-sym ";\n")))
|maybe v| v
(comp (list "Value *" arg
" = " list-sym "->head;\n"
"if (" list-sym "->tail) " list-sym "->tail->len = " list-sym "->len - 1;\n"
list-sym " = " list-sym "->tail;\n")
(.init arg-sym)
(unpack-arg-list list-sym arg-syms)))))
(defn gen-arg-syms [args]
(let [last-arg (last args :bogus)]
(sm/traverse args (fn [arg]
(match arg
|Keyword|
(sm/state-maybe (c-code "" empty-list empty-list :no-type))
;; TODO: test nested list destructuring
|List|
(for [args (gen-arg-syms arg)
c-sym (genlocal "arg")
list-sym (genlocal "arg")]
(c-code c-sym
(list* "List *" list-sym " = (List *)" c-sym ";\n"
(unpack-arg-list list-sym args))
empty-list
ListType))
(for [arg-sym (genlocal "arg")
:let [c-sym (match (= arg last-arg)
nothing (c-code arg-sym empty-list empty-list :no-type)
(c-code arg-sym empty-list empty-list ListType))]
_ (sm/assoc-in-val (list :local-syms arg) c-sym)]
c-sym))))))
(extend-type ast/binding-ast
Emitter
(emit-c [ast]
(for [evalled (fr/evaluate (.val ast) emit-c)
result (match (.binding ast)
|Symbol|
(for [_ (sm/assoc-in-val (list :local-syms (.binding ast))
(c-code (.c-val evalled) empty-list empty-list
(.type-num evalled)))]
evalled)
(for [arg-syms (gen-arg-syms (.binding ast))
list-sym (genlocal "arg")]
(c-code ""
(comp (.init evalled)
(list "List *" list-sym " = (List *)" (.c-val evalled) ";\n")
(unpack-arg-list list-sym arg-syms))
(.decl evalled)
:no-type)))]
result)))
(extend-type ast/let-ast
Emitter
(emit-c [ast]
(for [locals (sm/get-val :local-syms)
bindings (fr/evaluate (.bindings ast) emit-c)
body-exprs (eval-exprs (.body ast))
_ (sm/set-val :local-syms locals)]
(c-code (.c-val body-exprs)
(comp (crush bindings .init)
(.init body-exprs))
(comp (comp* empty-list (map bindings .decl)) (.decl body-exprs))
(.type-num body-exprs)))))
(defn eval-cond-clause [cond-result clause]
(match clause
|List test-ast value-ast|
(for [_ (begin-scope)
test (fr/evaluate test-ast emit-c)
:let [test-sym (str (.c-val test))]
_ (sm/assoc-in-val (list :scope-locals test-sym) "")
test-suffix (sm/get-val :scope-locals)
_ (begin-scope)
clause-result (fr/evaluate value-ast emit-c)
clause-suffix (sm/get-val :scope-locals)]
(c-code cond-result
(comp (.init test)
(map (seq test-suffix) second)
(match (= (str test-sym) (str (.c-val clause-result)))
nothing (list "\nif (" test-sym "->type != nothing_type) {\n"
"dec_and_free(" test-sym ");\n")
(list "\nif (" test-sym "->type != nothing_type) {\n"))
(.init clause-result)
(list "incRef(" (.c-val clause-result) ");\n"
(str cond-result " = " (.c-val clause-result) ";\n"))
(map (seq clause-suffix) second)
(list "} else {\n"
"dec_and_free(" test-sym ");\n"))
(comp (.decl test)
(.decl clause-result))
(.type-num clause-result)))
(for [_ (begin-scope)
clause-result (fr/evaluate clause emit-c)
clause-suffix (sm/get-val :scope-locals)]
(c-code cond-result
(comp (.init clause-result)
(list "incRef(" (.c-val clause-result) ");\n")
(list cond-result " = " (.c-val clause-result) ";\n")
(map (seq clause-suffix) second))
(.decl clause-result)
(.type-num clause-result)))))
(extend-type ast/cond-ast
Emitter
(emit-c [ast]
(for [cond-result (genlocal "cond")
scope-info (begin-scope)
evalled-clauses (sm/traverse (comp (.clauses ast) (list (.default ast)))
(partial eval-cond-clause cond-result))
_ (end-scope scope-info)
_ (remember-local cond-result)]
(let [return-type (match (apply = (map evalled-clauses .type-num))
|maybe return-type| return-type
:no-type)
evalled-clauses (apply comp evalled-clauses)]
(c-code cond-result
(comp (list "Value *" cond-result ";\n")
(.init evalled-clauses)
(repeat (count (.clauses ast)) "}\n"))
(.decl evalled-clauses)
return-type)))))
(defn expand-match-clauses [match-val-sym type-args-sym clauses]
(sm/traverse clauses
(fn [[pattern expr]]
(match pattern
|List|
(let [dont-care (gensym "dont_care_")
[[pattern-type & symbols] [_ & literals]]
(reduce (reverse pattern)
(list empty-list empty-list)
(fn [[symbols literals] x]
(match x
"&" (list (cons x symbols)
literals)
|Symbol| (list (cons x symbols)
(cons dont-care literals))
(list (cons dont-care symbols)
(cons x literals)))))
binding-syms (remove symbols (partial = "&"))
binding-syms (match (= (count symbols) (count binding-syms))
nothing binding-syms
(comp symbols (list dont-care)))]
;; TODO: could probably use 'some' here
(match (remove literals (partial = dont-care))
empty-list
(apply-to list
(an/analyze-expr
(list 'cond
(list 'instance? pattern-type match-val-sym)
(list 'let
(list (list type-args-sym
(list 'type-args match-val-sym)))
(list 'cond (list '< (list 'count type-args-sym)
(dec (count binding-syms)))
'nothing
'maybe1))
'nothing))
(for [b (an/analyze-let-binding (list binding-syms
(list 'type-args match-val-sym)))]
(ast/let-expr (list b) (list expr))))
(apply-to list
(let [temp-args (cons (gensym "t-")
(map literals (fn [_] (gensym "t-"))))
lit-checks (map (remove (zip-lists temp-args literals)
(fn [[_ literal]]
(= literal dont-care)))
(partial cons '=*))]
(an/analyze-expr (list 'cond
(list 'instance? pattern-type match-val-sym)
(list 'let
(list (list type-args-sym
(list 'type-args match-val-sym)))
(list 'cond
(list '< (list 'count type-args-sym)
(dec (count binding-syms)))
'nothing
(list 'let (list (list temp-args type-args-sym))
;; TODO: test this!!!
(match (count lit-checks)
1 (first lit-checks)
(cons 'and lit-checks)))))
'nothing)))
(for [b (an/analyze-let-binding (list binding-syms
(list 'type-args match-val-sym)))]
(ast/let-expr (list b) (list expr))))))
(for [test (an/analyze-expr (list '=* pattern match-val-sym))]
(list test expr))))))
(extend-type ast/match-ast
Emitter
(emit-c [ast]
(let [match-val-sym (gensym "match-val-")
type-args-sym (gensym "type-args-")]
(for [expanded-asts (expand-match-clauses match-val-sym type-args-sym (.clauses ast))
;; TODO: this just guarantees that "(instance? 'List ...) works
list-type (sm/get-in-val (list :types 'List))
_ (an/analyze-expr list-type)
:let [match-ast (ast/let-expr
(list (ast/binding match-val-sym (.value ast)))
(list
(ast/cond-expr
expanded-asts
(.default ast))))]
result (fr/evaluate match-ast emit-c)]
result))))
(defn get-module-defs []
(for [syms (sm/get-val :defined-syms)
types (sm/get-val :defined-types)
protos (sm/get-val :defined-protos)
file-name (sm/get-val :file-name)]
(list syms types protos file-name)))
(defn set-module-defs [defs]
(for [_ (sm/when (= 4 (count defs)))
:let [[syms types protos file-name] defs]
current-defs (get-module-defs)
_ (sm/set-val :defined-syms syms)
_ (sm/set-val :defined-types types)
_ (sm/set-val :defined-protos protos)
_ (sm/set-val :file-name file-name)]
current-defs))
(defn add-module-info [ns-sym module-name]
(apply-to (fn [& _]
(c-code "" empty-list empty-list :no-type))
(for [new-mod-syms (sm/get-in-val (list :modules module-name :syms))
_ (sm/traverse (seq new-mod-syms)
(fn [[sym def]]
(sm/assoc-in-val (list :defined-syms (symbol (str ns-sym "/" sym))) def)))]
"")
(comp (for [new-mod-protos (sm/get-in-val (list :modules module-name :protos))
_ (sm/traverse (seq new-mod-protos)
(fn [[proto def]]
(let [proto-sym (symbol (str ns-sym "/" proto))]
(for [dispatch-fn-sym (sm/get-in-val (list :protocols def :dispatch-sym))
_ (sm/assoc-in-val (list :defined-protos proto-sym) def)
_ (sm/assoc-in-val (list :defined-syms proto-sym)
(c-code dispatch-fn-sym empty-list
empty-list FunctionType))]
""))))]
"")
(sm/state-maybe ""))
(comp (for [new-mod-types (sm/get-in-val (list :modules module-name :types))
_ (sm/traverse (seq new-mod-types)
(fn [[type def]]
(sm/assoc-in-val (list :defined-types (symbol (str ns-sym "/" type))) def)))]
"")
(sm/state-maybe ""))))
(extend-type ast/add-ns-ast
Emitter
(emit-c [ast]
(let [module-name (.const-str (.v (first (.asts ast))))]
(comp
(add-module-info (.ns-sym ast) module-name)
(for [core-defs (sm/get-val :core-defs)
current-defs (set-module-defs core-defs)
_ (sm/set-val :file-name module-name)
_ (sm/traverse (rest (.asts ast)) (fn [ast] (fr/evaluate ast emit-c)))
_ (set-module-defs current-defs)
result (add-module-info (.ns-sym ast) module-name)]
result)
(sm/state-maybe (c-code "" empty-list empty-list :no-type))))))
(extend-type ast/main-ast
Emitter
(emit-c [ast]
(let [main-sym (gensym "main_")]
(for [_ (sm/set-val :main-sym main-sym)
arg-syms (gen-arg-syms (.args ast))
_ (sm/set-val :local-sym-count 0)
scope-info (begin-scope)
body (eval-exprs (.body ast))
_ (write-strs (.decl body))
_ (write-strs (list "\nint " main-sym " ("))
_ (write-strs (interpose (map arg-syms (fn [arg] (str "Value *" (.c-val arg))))
", "))
_ (write-strs (cons ") {\n" (.init body)))
scope-locals (for [scope-locals (sm/get-val :scope-locals)]
(map (seq scope-locals) second))
_ (write-strs scope-locals)
_ (write-strs (list "\nreturn(0);\n}\n\n"))]
(c-code "" empty-list empty-list :no-type)))))
(extend-type ast/fn-ast
Emitter
(emit-c [ast]
(let [fn-sym (gensym "fn_")
fn-ptr-sym (gensym "fnPtr_")
fn-name (.sym (.v (.fn-name ast)))]
(for [curr-fn-sym (sm/get-val :curr-fn-sym)
curr-fn-ptr (sm/get-val :curr-fn-ptr)
_ (sm/assoc-in-val (list :deref-pointers fn-ptr-sym) fn-sym)
_ (sm/set-val :curr-fn-sym fn-sym)
_ (sm/set-val :curr-fn-ptr fn-ptr-sym)
_ (write-strs (list "\n// --------- " fn-name " --------------\n"
"Function " fn-sym ";\n"
"Value *" fn-ptr-sym ";\n"))
_ (remember-local fn-ptr-sym)
_ (comp (for [def (sm/get-in-val (list :defined-syms fn-name))
:when-not (= 'anon fn-name)
_ (update-startup-init (list (.c-val def) " = " fn-ptr-sym ";\n"))]
"")
(sm/state-maybe ""))
;; TODO: check for anon fn, save previous value of
;; :defined-syms and restore at end
_ (sm/assoc-in-val (list :defined-syms fn-name)
(c-code fn-ptr-sym empty-list empty-list FunctionType))
arity-vals (fr/evaluate (.arities ast) emit-c)
:let [arity-count (count arity-vals)
arity-syms (map arity-vals .c-val)
arity-init (crush arity-vals .init)
arity-decl (crush arity-vals .decl)]
result (comp (for [_ (sm/when (list-empty? arity-init))
_ (sm/assoc-in-val (list :scope-locals fn-ptr-sym) "")]
(c-code fn-ptr-sym
empty-list
(comp arity-decl
(list "\n// --------- " fn-name " main body --------------\n"
"Function " fn-sym " = {FunctionType, -1, \""
fn-name "\", " arity-count ", "
"{" (apply str (interpose arity-syms ", ")) "}};\n"
"Value *" fn-ptr-sym " = (Value *)&" fn-sym ";\n\n"))
FunctionType))