Example #1
0
            public Expr Parse(ParserContext pcon, object frm)
            {
                ISeq form = (ISeq)frm;

                if (pcon.Rhc != RHC.Return)
                    return Compiler.Analyze(pcon, RT.list(RT.list(Compiler.FN, PersistentVector.EMPTY, form)), "try__" + RT.nextID());

                // (try try-expr* catch-expr* finally-expr?)
                // catch-expr: (catch class sym expr*)
                // finally-expr: (finally expr*)

                IPersistentVector body = PersistentVector.EMPTY;
                IPersistentVector catches = PersistentVector.EMPTY;
                Expr bodyExpr = null;
                Expr finallyExpr = null;
                bool caught = false;

                int retLocal = Compiler.GetAndIncLocalNum();
                int finallyLocal = Compiler.GetAndIncLocalNum();

                for (ISeq fs = form.next(); fs != null; fs = fs.next())
                {
                    object f = fs.first();
                    object op = (f is ISeq) ? ((ISeq)f).first() : null;
                    if (!Util.equals(op, Compiler.CATCH) && !Util.equals(op, Compiler.FINALLY))
                    {
                        if (caught)
                            throw new Exception("Only catch or finally clause can follow catch in try expression");
                        body = body.cons(f);
                    }
                    else
                    {
                        if (bodyExpr == null)
                            bodyExpr = new BodyExpr.Parser().Parse(pcon.SetAssign(false),RT.seq(body));
                        if (Util.equals(op, Compiler.CATCH))
                        {
                            Type t = HostExpr.MaybeType(RT.second(f), false);
                            if (t == null)
                                throw new ArgumentException("Unable to resolve classname: " + RT.second(f));
                            if (!(RT.third(f) is Symbol))
                                throw new ArgumentException("Bad binding form, expected symbol, got: " + RT.third(f));
                            Symbol sym = (Symbol)RT.third(f);
                            if (sym.Namespace != null)
                                throw new Exception("Can't bind qualified name: " + sym);

                            IPersistentMap dynamicBindings = RT.map(
                                Compiler.LOCAL_ENV, Compiler.LOCAL_ENV.deref(),
                                Compiler.NEXT_LOCAL_NUM, Compiler.NEXT_LOCAL_NUM.deref(),
                                Compiler.IN_CATCH_FINALLY, true);

                            try
                            {
                                Var.pushThreadBindings(dynamicBindings);
                                LocalBinding lb = Compiler.RegisterLocal(sym,
                                    (Symbol)(RT.second(f) is Symbol ? RT.second(f) : null),
                                    null,false);
                                Expr handler = (new BodyExpr.Parser()).Parse(pcon.SetAssign(false), RT.next(RT.next(RT.next(f))));
                                catches = catches.cons(new CatchClause(t, lb, handler)); ;
                            }
                            finally
                            {
                                Var.popThreadBindings();
                            }
                            caught = true;
                        }
                        else // finally
                        {
                            if (fs.next() != null)
                                throw new Exception("finally clause must be last in try expression");
                            try
                            {
                                //Var.pushThreadBindings(RT.map(Compiler.IN_CATCH_FINALLY, RT.T));
                                Var.pushThreadBindings(RT.map(Compiler.IN_CATCH_FINALLY, true));
                                finallyExpr = (new BodyExpr.Parser()).Parse(pcon.SetRhc(RHC.Statement).SetAssign(false), RT.next(f));
                            }
                            finally
                            {
                                Var.popThreadBindings();
                            }
                        }
                    }
                }

                if ( bodyExpr == null )
                    bodyExpr = (new BodyExpr.Parser()).Parse(pcon, RT.seq(body));
                return new TryExpr(bodyExpr, catches, finallyExpr, retLocal, finallyLocal);
            }
Example #2
0
            public Expr Parse(ParserContext pcon, object frm)
            {
                ISeq form = (ISeq)frm;

                // form => (let  [var1 val1 var2 val2 ... ] body ... )
                //      or (loop [var1 val1 var2 val2 ... ] body ... )

                bool isLoop = RT.first(form).Equals(Compiler.LoopSym);

                IPersistentVector bindings = RT.second(form) as IPersistentVector;

                if (bindings == null)
                    throw new ParseException("Bad binding form, expected vector");

                if ((bindings.count() % 2) != 0)
                    throw new ParseException("Bad binding form, expected matched symbol/value pairs.");

                ISeq body = RT.next(RT.next(form));

                if (pcon.Rhc == RHC.Eval
                    || (pcon.Rhc == RHC.Expression && isLoop))
                    return Compiler.Analyze(pcon, RT.list(RT.list(Compiler.FnOnceSym, PersistentVector.EMPTY, form)), "let__" + RT.nextID());

                ObjMethod method = (ObjMethod)Compiler.MethodVar.deref();
                IPersistentMap backupMethodLocals = method.Locals;
                IPersistentMap backupMethodIndexLocals = method.IndexLocals;

                IPersistentVector recurMismatches = PersistentVector.EMPTY;
                for (int i = 0; i < bindings.count() / 2; i++)
                {
                    recurMismatches = recurMismatches.cons(false);
                }

                // may repeat once for each binding with a mismatch, return breaks
                while (true)
                {

                    IPersistentMap dynamicBindings = RT.map(
                        Compiler.LocalEnvVar, Compiler.LocalEnvVar.deref(),
                        Compiler.NextLocalNumVar, Compiler.NextLocalNumVar.deref());
                    method.Locals = backupMethodLocals;
                    method.IndexLocals = backupMethodIndexLocals;

                    if (isLoop)
                        dynamicBindings = dynamicBindings.assoc(Compiler.LoopLocalsVar, null);

                    try
                    {
                        Var.pushThreadBindings(dynamicBindings);

                        IPersistentVector bindingInits = PersistentVector.EMPTY;
                        IPersistentVector loopLocals = PersistentVector.EMPTY;

                        for (int i = 0; i < bindings.count(); i += 2)
                        {
                            if (!(bindings.nth(i) is Symbol))
                                throw new ParseException("Bad binding form, expected symbol, got " + bindings.nth(i));

                            Symbol sym = (Symbol)bindings.nth(i);
                            if (sym.Namespace != null)
                                throw new ParseException("Can't let qualified name: " + sym);

                            Expr init = Compiler.Analyze(pcon.SetRhc(RHC.Expression).SetAssign(false), bindings.nth(i + 1), sym.Name);
                            if (isLoop)
                            {
                                if (recurMismatches != null && RT.booleanCast(recurMismatches.nth(i / 2)) )
                                {
                                    HostArg ha = new HostArg(HostArg.ParameterType.Standard, init, null);
                                    List<HostArg> has = new List<HostArg>(1);
                                    has.Add(ha);
                                    init = new StaticMethodExpr("", PersistentArrayMap.EMPTY, null, typeof(RT), "box", null, has, false);
                                    if (RT.booleanCast(RT.WarnOnReflectionVar.deref()))
                                        RT.errPrintWriter().WriteLine("Auto-boxing loop arg: " + sym);
                                }
                                else if (Compiler.MaybePrimitiveType(init) == typeof(int))
                                {
                                    List<HostArg> args = new List<HostArg>();
                                    args.Add(new HostArg(HostArg.ParameterType.Standard, init, null));
                                    init = new StaticMethodExpr("", null, null, typeof(RT), "longCast", null, args, false);
                                }
                                else if (Compiler.MaybePrimitiveType(init) == typeof(float))
                                {
                                    List<HostArg> args = new List<HostArg>();
                                    args.Add(new HostArg(HostArg.ParameterType.Standard, init, null));
                                    init = new StaticMethodExpr("", null, null, typeof(RT), "doubleCast", null, args, false);
                                }
                            }

                            // Sequential enhancement of env (like Lisp let*)
                            LocalBinding b = Compiler.RegisterLocal(sym, Compiler.TagOf(sym), init, false);
                            BindingInit bi = new BindingInit(b, init);
                            bindingInits = bindingInits.cons(bi);

                            if (isLoop)
                                loopLocals = loopLocals.cons(b);
                        }
                        if (isLoop)
                            Compiler.LoopLocalsVar.set(loopLocals);

                        Expr bodyExpr;
                        bool moreMismatches = false;
                        try
                        {
                            if (isLoop)
                            {
                                // stuff with clear paths,
                                Var.pushThreadBindings(RT.map(Compiler.NoRecurVar, null));
                            }
                            bodyExpr = new BodyExpr.Parser().Parse(isLoop ? pcon.SetRhc(RHC.Return) : pcon, body);
                        }
                        finally
                        {
                            if (isLoop)
                            {
                                Var.popThreadBindings();

                                for (int i = 0; i < loopLocals.count(); i++)
                                {
                                    LocalBinding lb = (LocalBinding)loopLocals.nth(i);
                                    if (lb.RecurMismatch)
                                    {
                                        recurMismatches = (IPersistentVector)recurMismatches.assoc(i, true);
                                        moreMismatches = true;
                                    }
                                }
                            }
                        }

                        if (!moreMismatches)

                            return new LetExpr(bindingInits, bodyExpr, isLoop);

                    }
                    finally
                    {
                        Var.popThreadBindings();
                    }
                }
            }
Example #3
0
            public Expr Parse(ParserContext pcon, object frm)
            {
                ISeq form = (ISeq)frm;

                if (pcon.Rhc != RHC.Return)
                {
                    return(Compiler.Analyze(pcon, RT.list(RT.list(Compiler.FnOnceSym, PersistentVector.EMPTY, form)), "try__" + RT.nextID()));
                }

                // (try try-expr* catch-expr* finally-expr?)
                // catch-expr: (catch class sym expr*)
                // finally-expr: (finally expr*)

                IPersistentVector body    = PersistentVector.EMPTY;
                IPersistentVector catches = PersistentVector.EMPTY;
                Expr bodyExpr             = null;
                Expr finallyExpr          = null;
                bool caught = false;

                ParserContext recursePcon = new ParserContext(RHC.Expression, false);

                int retLocal     = Compiler.GetAndIncLocalNum();
                int finallyLocal = Compiler.GetAndIncLocalNum();

                for (ISeq fs = form.next(); fs != null; fs = fs.next())
                {
                    object f    = fs.first();
                    ISeq   fSeq = f as ISeq;
                    object op   = fSeq != null?fSeq.first() : null;

                    if (!Util.equals(op, Compiler.CatchSym) && !Util.equals(op, Compiler.FinallySym))
                    {
                        if (caught)
                        {
                            throw new ParseException("Only catch or finally clause can follow catch in try expression");
                        }
                        body = body.cons(f);
                    }
                    else
                    {
                        if (bodyExpr == null)
                        {
                            try
                            {
                                Var.pushThreadBindings(RT.map(Compiler.NoRecurVar, true));
                                bodyExpr = new BodyExpr.Parser().Parse(pcon, RT.seq(body));
                            }
                            finally
                            {
                                Var.popThreadBindings();
                            }
                        }
                        if (Util.equals(op, Compiler.CatchSym))
                        {
                            Type t = HostExpr.MaybeType(RT.second(f), false);
                            if (t == null)
                            {
                                throw new ParseException("Unable to resolve classname: " + RT.second(f));
                            }
                            if (!(RT.third(f) is Symbol))
                            {
                                throw new ParseException("Bad binding form, expected symbol, got: " + RT.third(f));
                            }
                            Symbol sym = (Symbol)RT.third(f);
                            if (sym.Namespace != null)
                            {
                                throw new ParseException("Can't bind qualified name: " + sym);
                            }

                            IPersistentMap dynamicBindings = RT.map(
                                Compiler.LocalEnvVar, Compiler.LocalEnvVar.deref(),
                                Compiler.NextLocalNumVar, Compiler.NextLocalNumVar.deref(),
                                Compiler.InCatchFinallyVar, true);

                            try
                            {
                                Var.pushThreadBindings(dynamicBindings);
                                LocalBinding lb = Compiler.RegisterLocal(sym,
                                                                         (Symbol)(RT.second(f) is Symbol ? RT.second(f) : null),
                                                                         null, false);
                                Expr handler = (new BodyExpr.Parser()).Parse(recursePcon, RT.next(RT.next(RT.next(f))));
                                catches = catches.cons(new CatchClause(t, lb, handler));;
                            }
                            finally
                            {
                                Var.popThreadBindings();
                            }
                            caught = true;
                        }
                        else // finally
                        {
                            if (fs.next() != null)
                            {
                                throw new InvalidOperationException("finally clause must be last in try expression");
                            }
                            try
                            {
                                //Var.pushThreadBindings(RT.map(Compiler.IN_CATCH_FINALLY, RT.T));
                                Var.pushThreadBindings(RT.map(Compiler.InCatchFinallyVar, true));
                                finallyExpr = (new BodyExpr.Parser()).Parse(pcon.SetRhc(RHC.Statement).SetAssign(false), RT.next(f));
                            }
                            finally
                            {
                                Var.popThreadBindings();
                            }
                        }
                    }
                }

                if (bodyExpr == null)
                {
                    try
                    {
                        Var.pushThreadBindings(RT.map(Compiler.NoRecurVar, true));
                        bodyExpr = (new BodyExpr.Parser()).Parse(recursePcon, RT.seq(body));
                    }
                    finally
                    {
                        Var.popThreadBindings();
                    }
                }
                return(new TryExpr(bodyExpr, catches, finallyExpr, retLocal, finallyLocal));
            }
Example #4
0
            public Expr Parse(ParserContext pcon, object frm)
            {
                ISeq form = (ISeq)frm;

                // form => (let  [var1 val1 var2 val2 ... ] body ... )
                //      or (loop [var1 val1 var2 val2 ... ] body ... )

                bool isLoop = RT.first(form).Equals(Compiler.LoopSym);

                if (!(RT.second(form) is IPersistentVector bindings))
                {
                    throw new ParseException("Bad binding form, expected vector");
                }

                if ((bindings.count() % 2) != 0)
                {
                    throw new ParseException("Bad binding form, expected matched symbol/value pairs.");
                }

                ISeq body = RT.next(RT.next(form));

                if (pcon.Rhc == RHC.Eval ||
                    (pcon.Rhc == RHC.Expression && isLoop))
                {
                    return(Compiler.Analyze(pcon, RT.list(RT.list(Compiler.FnOnceSym, PersistentVector.EMPTY, form)), "let__" + RT.nextID()));
                }

                ObjMethod      method                  = (ObjMethod)Compiler.MethodVar.deref();
                IPersistentMap backupMethodLocals      = method.Locals;
                IPersistentMap backupMethodIndexLocals = method.IndexLocals;

                IPersistentVector recurMismatches = PersistentVector.EMPTY;

                for (int i = 0; i < bindings.count() / 2; i++)
                {
                    recurMismatches = recurMismatches.cons(false);
                }

                // may repeat once for each binding with a mismatch, return breaks
                while (true)
                {
                    IPersistentMap dynamicBindings = RT.map(
                        Compiler.LocalEnvVar, Compiler.LocalEnvVar.deref(),
                        Compiler.NextLocalNumVar, Compiler.NextLocalNumVar.deref());
                    method.SetLocals(backupMethodLocals, backupMethodIndexLocals);

                    if (isLoop)
                    {
                        dynamicBindings = dynamicBindings.assoc(Compiler.LoopLocalsVar, null);
                    }

                    try
                    {
                        Var.pushThreadBindings(dynamicBindings);

                        IPersistentVector bindingInits = PersistentVector.EMPTY;
                        IPersistentVector loopLocals   = PersistentVector.EMPTY;

                        for (int i = 0; i < bindings.count(); i += 2)
                        {
                            if (!(bindings.nth(i) is Symbol))
                            {
                                throw new ParseException("Bad binding form, expected symbol, got " + bindings.nth(i));
                            }

                            Symbol sym = (Symbol)bindings.nth(i);
                            if (sym.Namespace != null)
                            {
                                throw new ParseException("Can't let qualified name: " + sym);
                            }

                            Expr init = Compiler.Analyze(pcon.SetRhc(RHC.Expression).SetAssign(false), bindings.nth(i + 1), sym.Name);
                            if (isLoop)
                            {
                                if (recurMismatches != null && RT.booleanCast(recurMismatches.nth(i / 2)))
                                {
                                    HostArg        ha  = new HostArg(HostArg.ParameterType.Standard, init, null);
                                    List <HostArg> has = new List <HostArg>(1)
                                    {
                                        ha
                                    };
                                    init = new StaticMethodExpr("", PersistentArrayMap.EMPTY, null, typeof(RT), "box", null, has, false);
                                    if (RT.booleanCast(RT.WarnOnReflectionVar.deref()))
                                    {
                                        RT.errPrintWriter().WriteLine("Auto-boxing loop arg: " + sym);
                                    }
                                }
                                else if (Compiler.MaybePrimitiveType(init) == typeof(int))
                                {
                                    List <HostArg> args = new List <HostArg>
                                    {
                                        new HostArg(HostArg.ParameterType.Standard, init, null)
                                    };
                                    init = new StaticMethodExpr("", null, null, typeof(RT), "longCast", null, args, false);
                                }
                                else if (Compiler.MaybePrimitiveType(init) == typeof(float))
                                {
                                    List <HostArg> args = new List <HostArg>
                                    {
                                        new HostArg(HostArg.ParameterType.Standard, init, null)
                                    };
                                    init = new StaticMethodExpr("", null, null, typeof(RT), "doubleCast", null, args, false);
                                }
                            }

                            // Sequential enhancement of env (like Lisp let*)
                            LocalBinding b  = Compiler.RegisterLocal(sym, Compiler.TagOf(sym), init, typeof(Object), false);
                            BindingInit  bi = new BindingInit(b, init);
                            bindingInits = bindingInits.cons(bi);

                            if (isLoop)
                            {
                                loopLocals = loopLocals.cons(b);
                            }
                        }
                        if (isLoop)
                        {
                            Compiler.LoopLocalsVar.set(loopLocals);
                        }

                        Expr bodyExpr;
                        bool moreMismatches = false;
                        try
                        {
                            if (isLoop)
                            {
                                object methodReturnContext = pcon.Rhc == RHC.Return ? Compiler.MethodReturnContextVar.deref() : null;
                                // stuff with clear paths,
                                Var.pushThreadBindings(RT.map(Compiler.NoRecurVar, null,
                                                              Compiler.MethodReturnContextVar, methodReturnContext));
                            }
                            bodyExpr = new BodyExpr.Parser().Parse(isLoop ? pcon.SetRhc(RHC.Return) : pcon, body);
                        }
                        finally
                        {
                            if (isLoop)
                            {
                                Var.popThreadBindings();

                                for (int i = 0; i < loopLocals.count(); i++)
                                {
                                    LocalBinding lb = (LocalBinding)loopLocals.nth(i);
                                    if (lb.RecurMismatch)
                                    {
                                        recurMismatches = (IPersistentVector)recurMismatches.assoc(i, true);
                                        moreMismatches  = true;
                                    }
                                }
                            }
                        }

                        if (!moreMismatches)
                        {
                            return(new LetExpr(bindingInits, bodyExpr, isLoop));
                        }
                    }
                    finally
                    {
                        Var.popThreadBindings();
                    }
                }
            }
Example #5
0
            public Expr Parse(ParserContext pcon, object frm)
            {
                ISeq form = (ISeq)frm;

                if (pcon.Rhc != RHC.Return)
                    return Compiler.Analyze(pcon, RT.list(RT.list(Compiler.FnOnceSym, PersistentVector.EMPTY, form)), "try__" + RT.nextID());

                // (try try-expr* catch-expr* finally-expr?)
                // catch-expr: (catch class sym expr*)
                // finally-expr: (finally expr*)

                IPersistentVector body = PersistentVector.EMPTY;
                IPersistentVector catches = PersistentVector.EMPTY;
                Expr bodyExpr = null;
                Expr finallyExpr = null;
                bool caught = false;

                ParserContext recursePcon = new ParserContext(RHC.Expression,false);

                int retLocal = Compiler.GetAndIncLocalNum();
                int finallyLocal = Compiler.GetAndIncLocalNum();

                for (ISeq fs = form.next(); fs != null; fs = fs.next())
                {
                    object f = fs.first();
                    ISeq fSeq = f as ISeq;
                    object op = fSeq != null ? fSeq.first() : null;
                    if (!Util.equals(op, Compiler.CatchSym) && !Util.equals(op, Compiler.FinallySym))
                    {
                        if (caught)
                            throw new ParseException("Only catch or finally clause can follow catch in try expression");
                        body = body.cons(f);
                    }
                    else
                    {
                        if (bodyExpr == null)
                        {
                            try
                            {
                                Var.pushThreadBindings(RT.map(Compiler.NoRecurVar, true, Compiler.InTryBlockVar, true));
                                bodyExpr = new BodyExpr.Parser().Parse(pcon, RT.seq(body));
                            }
                            finally
                            {
                                Var.popThreadBindings();
                            }
                        }
                        if (Util.equals(op, Compiler.CatchSym))
                        {
                            Type t = HostExpr.MaybeType(RT.second(f), false);
                            if (t == null)
                                throw new ParseException("Unable to resolve classname: " + RT.second(f));
                            if (!(RT.third(f) is Symbol))
                                throw new ParseException("Bad binding form, expected symbol, got: " + RT.third(f));
                            Symbol sym = (Symbol)RT.third(f);
                            if (sym.Namespace != null)
                                throw new ParseException("Can't bind qualified name: " + sym);

                            IPersistentMap dynamicBindings = RT.map(
                                Compiler.LocalEnvVar, Compiler.LocalEnvVar.deref(),
                                Compiler.NextLocalNumVar, Compiler.NextLocalNumVar.deref(),
                                Compiler.InCatchFinallyVar, true);

                            try
                            {
                                Var.pushThreadBindings(dynamicBindings);
                                LocalBinding lb = Compiler.RegisterLocal(sym,
                                    (Symbol)(RT.second(f) is Symbol ? RT.second(f) : null),
                                    null, typeof(Object), false);
                                Expr handler = (new BodyExpr.Parser()).Parse(recursePcon, RT.next(RT.next(RT.next(f))));
                                catches = catches.cons(new CatchClause(t, lb, handler)); ;
                            }
                            finally
                            {
                                Var.popThreadBindings();
                            }
                            caught = true;
                        }
                        else // finally
                        {
                            if (fs.next() != null)
                                throw new InvalidOperationException("finally clause must be last in try expression");
                            try
                            {
                                //Var.pushThreadBindings(RT.map(Compiler.IN_CATCH_FINALLY, RT.T));
                                Var.pushThreadBindings(RT.map(Compiler.InCatchFinallyVar, true));
                                finallyExpr = (new BodyExpr.Parser()).Parse(pcon.SetRhc(RHC.Statement).SetAssign(false), RT.next(f));
                            }
                            finally
                            {
                                Var.popThreadBindings();
                            }
                        }
                    }
                }

                if (bodyExpr == null)
                {
                    // this codepath is hit when there is neither catch nor finally, e.g., (try (expr))
                    // return a body expr directly
                    try
                    {
                        Var.pushThreadBindings(RT.map(Compiler.NoRecurVar, true));
                        bodyExpr = (new BodyExpr.Parser()).Parse(recursePcon, RT.seq(body));
                    }
                    finally
                    {
                        Var.popThreadBindings();
                    }
                    return bodyExpr;
                }
                return new TryExpr(bodyExpr, catches, finallyExpr, retLocal, finallyLocal);
            }
Example #6
0
            public Expr Parse(ParserContext pcon, object frm)
            {
                ISeq form = (ISeq)frm;

                // form => (let  [var1 val1 var2 val2 ... ] body ... )
                //      or (loop [var1 val1 var2 val2 ... ] body ... )

                bool isLoop = RT.first(form).Equals(Compiler.LOOP);

                IPersistentVector bindings = RT.second(form) as IPersistentVector;

                if (bindings == null)
                    throw new ArgumentException("Bad binding form, expected vector");

                if ((bindings.count() % 2) != 0)
                    throw new ArgumentException("Bad binding form, expected matched symbol/value pairs.");

                ISeq body = RT.next(RT.next(form));

                if (pcon.Rhc == RHC.Eval
                    || (pcon.Rhc == RHC.Expression && isLoop))
                    return Compiler.Analyze(pcon, RT.list(RT.list(Compiler.FN, PersistentVector.EMPTY, form)),"let__"+RT.nextID());

                ObjMethod method = (ObjMethod)Compiler.METHOD.deref();
                IPersistentMap backupMethodLocals = method.Locals;
                IPersistentMap backupMethodIndexLocals = method.IndexLocals;
                IPersistentVector recurMismatches = null;

                // we might repeat once if a loop with a recurMismatch, return breaks
                while (true)
                {

                    IPersistentMap dynamicBindings = RT.map(
                        Compiler.LOCAL_ENV, Compiler.LOCAL_ENV.deref(),
                        Compiler.NEXT_LOCAL_NUM, Compiler.NEXT_LOCAL_NUM.deref());

                    if (isLoop)
                        dynamicBindings = dynamicBindings.assoc(Compiler.LOOP_LOCALS, null);

                    try
                    {
                        Var.pushThreadBindings(dynamicBindings);

                        IPersistentVector bindingInits = PersistentVector.EMPTY;
                        IPersistentVector loopLocals = PersistentVector.EMPTY;

                        for (int i = 0; i < bindings.count(); i += 2)
                        {
                            if (!(bindings.nth(i) is Symbol))
                                throw new ArgumentException("Bad binding form, expected symbol, got " + bindings.nth(i));

                            Symbol sym = (Symbol)bindings.nth(i);
                            if (sym.Namespace != null)
                                throw new Exception("Can't let qualified name: " + sym);

                            Expr init = Compiler.Analyze(pcon.SetRhc(RHC.Expression).SetAssign(false), bindings.nth(i + 1), sym.Name);
                            //if (isLoop)
                            //{
                            //    if (recurMismatches != null && ((LocalBinding)recurMismatches.nth(i / 2)).RecurMistmatch)
                            //    {
                            //        HostArg ha = new HostArg(HostArg.ParameterType.Standard,init,null);
                            //        List<HostArg> has = new List<HostArg>(1);
                            //        has.Add(ha);
                            //        init = new StaticMethodExpr("", PersistentArrayMap.EMPTY, null, typeof(RT), "box", has);
                            //        if (RT.booleanCast(RT.WARN_ON_REFLECTION.deref()))
                            //            RT.errPrintWriter().WriteLine("Auto-boxing loop arg: " + sym);
                            //    }
                            //    else if (Compiler.MaybePrimitiveType(init) == typeof(int))
                            //    {
                            //        HostArg ha = new HostArg(HostArg.ParameterType.Standard, init, null);
                            //        List<HostArg> has = new List<HostArg>(1);
                            //        has.Add(ha);
                            //        init = new StaticMethodExpr("", PersistentArrayMap.EMPTY, null, typeof(RT), "longCast", has);
                            //    }
                            //    else if (Compiler.MaybePrimitiveType(init) == typeof(float))
                            //    {
                            //        HostArg ha = new HostArg(HostArg.ParameterType.Standard, init, null);
                            //        List<HostArg> has = new List<HostArg>(1);
                            //        has.Add(ha);
                            //        init = new StaticMethodExpr("", PersistentArrayMap.EMPTY, null, typeof(RT), "doubleCast", has);
                            //    }
                            //}

                            // Sequential enhancement of env (like Lisp let*)
                            LocalBinding b = Compiler.RegisterLocal(sym, Compiler.TagOf(sym), init, false);
                            BindingInit bi = new BindingInit(b, init);
                            bindingInits = bindingInits.cons(bi);

                            if (isLoop)
                                loopLocals = loopLocals.cons(b);
                        }
                        if (isLoop)
                            Compiler.LOOP_LOCALS.set(loopLocals);

                        Expr bodyExpr;
                        try
                        {
                            if (isLoop)
                            {
                                // stuff with clear paths
                            }
                            bodyExpr = new BodyExpr.Parser().Parse(isLoop ? pcon.SetRhc(RHC.Return) : pcon, body);
                        }
                        finally
                        {
                            if (isLoop)
                            {
                                // stuff with clear paths
                                recurMismatches = null;
                                for (int i = 0; i < loopLocals.count(); i++)
                                {
                                    LocalBinding lb = (LocalBinding)loopLocals.nth(i);
                                    if (lb.RecurMistmatch)
                                        recurMismatches = loopLocals;
                                }
                            }
                        }

                        if (recurMismatches == null)
                            return new LetExpr(bindingInits, bodyExpr, isLoop);

                    }
                    finally
                    {
                        Var.popThreadBindings();
                    }
                }
            }