diff options
Diffstat (limited to 'new-luxc/source/luxc/lang/synthesis/expression.lux')
| -rw-r--r-- | new-luxc/source/luxc/lang/synthesis/expression.lux | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/new-luxc/source/luxc/lang/synthesis/expression.lux b/new-luxc/source/luxc/lang/synthesis/expression.lux new file mode 100644 index 000000000..05b99923b --- /dev/null +++ b/new-luxc/source/luxc/lang/synthesis/expression.lux @@ -0,0 +1,184 @@ +(;module: + lux + (lux (control ["p" parser]) + (data [maybe] + ["e" error] + [number] + [product] + text/format + (coll [list "list/" Functor<List> Fold<List> Monoid<List>] + [dict #+ Dict])) + (meta [code] + ["s" syntax])) + (luxc ["&" base] + (lang ["la" analysis] + ["ls" synthesis] + (synthesis [";S" case] + [";S" function] + [";S" loop]) + [";L" variable #+ Variable]) + )) + +(def: init-env (List Variable) (list)) +(def: init-resolver (Dict Int Int) (dict;new number;Hash<Int>)) + +(def: (prepare-body inner-arity arity body) + (-> Nat Nat ls;Synthesis ls;Synthesis) + (if (functionS;nested? inner-arity) + body + (loopS;reify-recursion arity body))) + +(def: (let$ register inputS bodyS) + (-> Nat ls;Synthesis ls;Synthesis ls;Synthesis) + (` ("lux let" (~ (code;nat register)) (~ inputS) (~ bodyS)))) + +(def: (if$ testS thenS elseS) + (-> ls;Synthesis ls;Synthesis ls;Synthesis ls;Synthesis) + (` ("lux if" (~ testS) + (~ thenS) + (~ elseS)))) + +(def: (function$ arity environment body) + (-> ls;Arity (List Variable) ls;Synthesis ls;Synthesis) + (` ("lux function" (~ (code;nat arity)) + [(~@ (list/map code;int environment))] + (~ body)))) + +(def: (variant$ tag last? valueS) + (-> Nat Bool ls;Synthesis ls;Synthesis) + (` ((~ (code;nat tag)) (~ (code;bool last?)) (~ valueS)))) + +(def: (var$ var) + (-> Variable ls;Synthesis) + (` ((~ (code;int var))))) + +(def: (procedure$ name argsS) + (-> Text (List ls;Synthesis) ls;Synthesis) + (` ((~ (code;text name)) (~@ argsS)))) + +(def: (call$ funcS argsS) + (-> ls;Synthesis (List ls;Synthesis) ls;Synthesis) + (` ("lux call" (~ funcS) (~@ argsS)))) + +(def: (synthesize-case synthesize inputA branchesA) + (-> (-> la;Analysis ls;Synthesis) + la;Analysis (List [la;Pattern la;Analysis]) + ls;Synthesis) + (let [inputS (synthesize inputA)] + (case (list;reverse branchesA) + (^multi (^ (list [(^code ("lux case bind" (~ [_ (#;Nat input-register)]))) + (^code ((~ [_ (#;Int var)])))])) + (not (variableL;captured? var)) + (n.= input-register (int-to-nat var))) + inputS + + (^ (list [(^code ("lux case bind" (~ [_ (#;Nat register)]))) bodyA])) + (let$ register inputS (synthesize bodyA)) + + (^or (^ (list [(^code true) thenA] [(^code false) elseA])) + (^ (list [(^code false) elseA] [(^code true) thenA]))) + (if$ inputS (synthesize thenA) (synthesize elseA)) + + (#;Cons [lastP lastA] prevsPA) + (let [transform-branch (: (-> la;Pattern la;Analysis ls;Path) + (function [pattern expr] + (|> (synthesize expr) + (~) ("lux case exec") + ("lux case seq" (~ (caseS;path pattern))) + (`))))] + (` ("lux case" (~ inputS) + (~ (list/fold caseS;weave + (transform-branch lastP lastA) + (list/map (product;uncurry transform-branch) prevsPA)))))) + + _ + (undefined) + ))) + +(def: (synthesize-apply synthesize outer-arity num-locals exprA) + (-> (-> la;Analysis ls;Synthesis) ls;Arity Nat la;Analysis ls;Synthesis) + (let [[funcA argsA] (functionS;unfold-apply exprA) + funcS (synthesize funcA) + argsS (list/map synthesize argsA)] + (case funcS + (^multi (^ [_ (#;Form (list [_ (#;Text "lux function")] [_ (#;Nat _arity)] [_ (#;Tuple _env)] _bodyS))]) + (and (n.= _arity (list;size argsS)) + (not (loopS;contains-self-reference? _bodyS))) + [(s;run _env (p;some s;int)) (#e;Success _env)]) + (let [register-offset (if (functionS;top? outer-arity) + num-locals + (|> outer-arity n.inc (n.+ num-locals)))] + (` ("lux loop" (~ (code;nat register-offset)) [(~@ argsS)] + (~ (loopS;adjust _env register-offset _bodyS))))) + + (^ [_ (#;Form (list& [_ (#;Text "lux call")] funcS' argsS'))]) + (call$ funcS' (list/compose argsS' argsS)) + + _ + (call$ funcS argsS)))) + +(def: #export (synthesize analysis) + (-> la;Analysis ls;Synthesis) + (loop [outer-arity +0 + resolver init-resolver + num-locals +0 + exprA analysis] + (case exprA + (^code [(~ _left) (~ _right)]) + (` [(~@ (list/map (recur +0 resolver num-locals) (la;unfold-tuple exprA)))]) + + (^or (^code ("lux sum left" (~ _))) + (^code ("lux sum right" (~ _)))) + (let [[tag last? value] (maybe;assume (la;unfold-variant exprA))] + (variant$ tag last? (recur +0 resolver num-locals value))) + + (^code ((~ [_ (#;Int var)]))) + (if (variableL;local? var) + (let [register (variableL;local-register var)] + (if (functionS;nested? outer-arity) + (if (n.= +0 register) + (call$ (var$ 0) (|> (list;n.range +1 (n.dec outer-arity)) + (list/map (|>. variableL;local code;int (~) () (`))))) + (var$ (functionS;adjust-var outer-arity (variableL;local register)))) + (var$ (variableL;local register)))) + (let [register (variableL;captured-register var)] + (var$ (let [var (variableL;captured register)] + (maybe;default var (dict;get var resolver)))))) + + (^code ("lux case" (~ inputA) (~ [_ (#;Record branchesA)]))) + (synthesize-case (recur +0 resolver num-locals) inputA branchesA) + + (^multi (^code ("lux function" [(~@ scope)] (~ bodyA))) + [(s;run scope (p;some s;int)) (#e;Success raw-env)]) + (let [inner-arity (n.inc outer-arity) + env (list/map (function [var] (maybe;default var (dict;get var resolver))) raw-env) + env-vars (let [env-size (list;size raw-env)] + (: (List Variable) + (case env-size + +0 (list) + _ (list/map variableL;captured (list;n.range +0 (n.dec env-size)))))) + resolver' (if (functionS;nested? inner-arity) + (list/fold (function [[from to] resolver'] + (dict;put from to resolver')) + init-resolver + (list;zip2 env-vars env)) + (list/fold (function [var resolver'] + (dict;put var var resolver')) + init-resolver + env-vars))] + (case (recur inner-arity resolver' +0 bodyA) + (^ [_ (#;Form (list [_ (#;Text "lux function")] [_ (#;Nat arity')] env' bodyS'))]) + (let [arity (n.inc arity')] + (function$ arity env (prepare-body inner-arity arity bodyS'))) + + bodyS + (function$ +1 env (prepare-body inner-arity +1 bodyS)))) + + (^code ("lux apply" (~@ _))) + (synthesize-apply synthesize outer-arity num-locals exprA) + + (^code ((~ [_ (#;Text name)]) (~@ args))) + (procedure$ name (list/map (recur +0 resolver num-locals) args)) + + _ + exprA))) |