auto_super_init: handle the case of constructors redefinition (instead of infinitivel...
[nit.git] / src / naive_interpreter.nit
index 0c6c5ed..d974e08 100644 (file)
@@ -21,6 +21,8 @@ import literal
 import typing
 import auto_super_init
 import frontend
+import common_ffi
+private import parser::tables
 
 redef class ToolContext
        # --discover-call-trace
@@ -62,8 +64,8 @@ redef class ModelBuilder
                if initprop != null then
                        interpreter.send(initprop, [mainobj])
                end
-               interpreter.check_init_instance(mainobj)
-               var mainprop = mainmodule.try_get_primitive_method("main", sys_type.mclass)
+               var mainprop = mainmodule.try_get_primitive_method("run", sys_type.mclass) or else
+                       mainmodule.try_get_primitive_method("main", sys_type.mclass)
                if mainprop != null then
                        interpreter.send(mainprop, [mainobj])
                end
@@ -170,7 +172,7 @@ private class NaiveInterpreter
                var implicit_cast_to = n.implicit_cast_to
                if implicit_cast_to != null then
                        var mtype = self.unanchor_type(implicit_cast_to)
-                       if not self.is_subtype(i.mtype, mtype) then n.fatal(self, "Cast failed")
+                       if not self.is_subtype(i.mtype, mtype) then n.fatal(self, "Cast failed. Expected `{implicit_cast_to}`, got `{i.mtype}`")
                end
 
                #n.debug("OUT Execute expr: value is {i}")
@@ -243,14 +245,13 @@ private class NaiveInterpreter
                var res = new MutableInstance(mtype)
                self.init_instance(res)
                self.send(self.force_get_primitive_method("with_native", mtype), [res, nat, self.int_instance(values.length)])
-               self.check_init_instance(res)
                return res
        end
 
        # Return a new native string initialized with `txt`
        fun native_string_instance(txt: String): Instance
        do
-               var val = new Buffer.from(txt)
+               var val = new FlatBuffer.from(txt)
                val.add('\0')
                var ic = self.mainmodule.get_primitive_class("NativeString")
                return new PrimitiveInstance[Buffer](ic.mclass_type, val)
@@ -265,7 +266,7 @@ private class NaiveInterpreter
        # Return a stack stace. One line per function
        fun stack_trace: String
        do
-               var b = new Buffer
+               var b = new FlatBuffer
                b.append(",---- Stack trace -- - -  -\n")
                for f in frames do
                        b.append("| {f.mpropdef} ({f.current_node.location})\n")
@@ -298,10 +299,8 @@ private class NaiveInterpreter
        # Store known method, used to trace methods as thez are reached
        var discover_call_trace: Set[MMethodDef] = new HashSet[MMethodDef]
 
-       # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
-       # Return a falue if `mpropdef` is a function, or null if it is a procedure.
-       # The call is direct/static. There is no message-seding/late-binding.
-       fun call(mpropdef: MMethodDef, args: Array[Instance]): nullable Instance
+       # Common code for calls to injected methods and normal methods
+       fun call_commons(mpropdef: MMethodDef, args: Array[Instance]): Array[Instance]
        do
                var vararg_rank = mpropdef.msignature.vararg_rank
                if vararg_rank >= 0 then
@@ -328,6 +327,15 @@ private class NaiveInterpreter
                                args.add(rawargs[i+1])
                        end
                end
+               return args
+       end
+
+       # Execute `mpropdef` for a `args` (where `args[0]` is the receiver).
+       # Return a falue if `mpropdef` is a function, or null if it is a procedure.
+       # The call is direct/static. There is no message-seding/late-binding.
+       fun call(mpropdef: MMethodDef, args: Array[Instance]): nullable Instance
+       do
+               args = call_commons(mpropdef, args)
                return call_without_varargs(mpropdef, args)
        end
 
@@ -341,9 +349,7 @@ private class NaiveInterpreter
                        self.discover_call_trace.add mpropdef
                        self.debug("Discovered {mpropdef}")
                end
-               if args.length < mpropdef.msignature.arity + 1 or args.length > mpropdef.msignature.arity + 1 then
-                       fatal("NOT YET IMPLEMENTED: Invalid arity for {mpropdef}. {args.length} arguments given.")
-               end
+               assert args.length == mpropdef.msignature.arity + 1 else debug("Invalid arity for {mpropdef}. {args.length} arguments given.")
 
                # Look for the AST node that implements the property
                var mproperty = mpropdef.mproperty
@@ -376,30 +382,44 @@ private class NaiveInterpreter
                        # get the parameter type
                        var mtype = msignature.mparameters[i].mtype
                        var anchor = args.first.mtype.as(MClassType)
-                       mtype = mtype.anchor_to(self.mainmodule, anchor)
-                       if not args[i+1].mtype.is_subtype(self.mainmodule, anchor, mtype) then
-                               node.fatal(self, "Cast failed")
+                       var amtype = mtype.anchor_to(self.mainmodule, anchor)
+                       if not args[i+1].mtype.is_subtype(self.mainmodule, anchor, amtype) then
+                               node.fatal(self, "Cast failed. Expected `{mtype}`, got `{args[i+1].mtype}`")
                        end
                end
        end
 
-       # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
-       # Return a falue if `mproperty` is a function, or null if it is a procedure.
-       # The call is polimotphic. There is a message-seding/late-bindng according to te receiver (args[0]).
-       fun send(mproperty: MMethod, args: Array[Instance]): nullable Instance
+       # Common code for runtime injected calls and normal calls
+       fun send_commons(mproperty: MMethod, args: Array[Instance], mtype: MType): nullable Instance
        do
-               var recv = args.first
-               var mtype = recv.mtype
                if mtype isa MNullType then
                        if mproperty.name == "==" then
                                return self.bool_instance(args[0] == args[1])
                        else if mproperty.name == "!=" then
                                return self.bool_instance(args[0] != args[1])
                        end
-                       #fatal("Reciever is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
-                       fatal("Reciever is null")
-                       abort
+                       #fatal("Receiver is null. {mproperty}. {args.join(" ")} {self.frame.current_node.class_name}")
+                       fatal("Receiver is null")
                end
+               return null
+       end
+
+       # Execute a full `callsite` for given `args`
+       # Use this method, instead of `send` to execute and control the aditionnal behavior of the call-sites
+       fun callsite(callsite: nullable CallSite, arguments: Array[Instance]): nullable Instance
+       do
+               return send(callsite.mproperty, arguments)
+       end
+
+       # Execute `mproperty` for a `args` (where `args[0]` is the receiver).
+       # Return a falue if `mproperty` is a function, or null if it is a procedure.
+       # The call is polimotphic. There is a message-seding/late-bindng according to te receiver (args[0]).
+       fun send(mproperty: MMethod, args: Array[Instance]): nullable Instance
+       do
+               var recv = args.first
+               var mtype = recv.mtype
+               var ret = send_commons(mproperty, args, mtype)
+               if ret != null then return ret
                var propdef = mproperty.lookup_first_definition(self.mainmodule, mtype)
                return self.call(propdef, args)
        end
@@ -416,6 +436,20 @@ private class NaiveInterpreter
                return recv.attributes[mproperty]
        end
 
+       # Replace in `recv` the value of the attribute `mproperty` by `value`
+       fun write_attribute(mproperty: MAttribute, recv: Instance, value: Instance)
+       do
+               assert recv isa MutableInstance
+               recv.attributes[mproperty] = value
+       end
+
+       # Is the attribute `mproperty` initialized the instance `recv`?
+       fun isset_attribute(mproperty: MAttribute, recv: Instance): Bool
+       do
+               assert recv isa MutableInstance
+               return recv.attributes.has_key(mproperty)
+       end
+
        # Collect attributes of a type in the order of their init
        fun collect_attr_propdef(mtype: MType): Array[AAttrPropdef]
        do
@@ -449,19 +483,6 @@ private class NaiveInterpreter
                end
        end
 
-       # Check that non nullable attributes of `recv` are correctly initialized.
-       # This function is used as the last instruction of a new
-       fun check_init_instance(recv: Instance)
-       do
-               if not recv isa MutableInstance then return
-               for npropdef in collect_attr_propdef(recv.mtype) do
-                       if npropdef.n_expr == null then
-                               # Force read to check the initialization
-                               self.read_attribute(npropdef.mpropdef.mproperty, recv)
-                       end
-               end
-       end
-
        # This function determine the correct type according the reciever of the current definition (self).
        fun unanchor_type(mtype: MType): MType
        do
@@ -481,7 +502,7 @@ abstract class Instance
        fun is_true: Bool do abort
 
        # Return true if `self` IS `o` (using the Nit semantic of is)
-       fun eq_is(o: Instance): Bool do return self is o
+       fun eq_is(o: Instance): Bool do return self.is_same_instance(o)
 
        # Human readable object identity "Type#number"
        redef fun to_s do return "{mtype}"
@@ -537,7 +558,7 @@ class PrimitiveInstance[E: Object]
        redef fun eq_is(o)
        do
                if not o isa PrimitiveInstance[Object] then return false
-               return self.val is o.val
+               return self.val.is_same_instance(o.val)
        end
 
        redef fun to_s do return "{mtype}#{val.object_id}({val})"
@@ -567,11 +588,11 @@ redef class ANode
        private fun fatal(v: NaiveInterpreter, message: String)
        do
                if v.modelbuilder.toolcontext.opt_no_color.value == true then
-                       stderr.write("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
+                       sys.stderr.write("Runtime error: {message} ({location.file.filename}:{location.line_start})\n")
                else
-                       stderr.write("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
-                       stderr.write(v.stack_trace)
-                       stderr.write("\n")
+                       sys.stderr.write("{location}: Runtime error: {message}\n{location.colored_line("0;31")}\n")
+                       sys.stderr.write(v.stack_trace)
+                       sys.stderr.write("\n")
                end
                exit(1)
        end
@@ -586,45 +607,66 @@ redef class APropdef
        end
 end
 
-redef class AConcreteMethPropdef
+redef class AMethPropdef
+       super TablesCapable
+
        redef fun call(v, mpropdef, args)
        do
                var f = new Frame(self, self.mpropdef.as(not null), args)
+               var res = call_commons(v, mpropdef, args, f)
+               v.frames.shift
+               if v.returnmark == f then
+                       v.returnmark = null
+                       res = v.escapevalue
+                       v.escapevalue = null
+                       return res
+               end
+               return res
+       end
+
+       private fun call_commons(v: NaiveInterpreter, mpropdef: MMethodDef, arguments: Array[Instance], f: Frame): nullable Instance
+       do
                for i in [0..mpropdef.msignature.arity[ do
                        var variable = self.n_signature.n_params[i].variable
                        assert variable != null
-                       f.map[variable] = args[i+1]
+                       f.map[variable] = arguments[i+1]
                end
 
                v.frames.unshift(f)
 
+               if mpropdef.is_abstract then
+                       v.fatal("Abstract method `{mpropdef.mproperty.name}` called on `{arguments.first.mtype}`")
+                       abort
+               end
+
                # Call the implicit super-init
                var auto_super_inits = self.auto_super_inits
                if auto_super_inits != null then
-                       var selfarg = [args.first]
+                       var args = [arguments.first]
                        for auto_super_init in auto_super_inits do
-                               if auto_super_init.intro.msignature.arity == 0 then
-                                       v.send(auto_super_init, selfarg)
-                               else
-                                       v.send(auto_super_init, args)
+                               args.clear
+                               for i in [0..auto_super_init.msignature.arity+1[ do
+                                       args.add(arguments[i])
                                end
+                               assert auto_super_init.mproperty != mpropdef.mproperty
+                               v.callsite(auto_super_init, args)
                        end
                end
+               if auto_super_call then
+                       # standard call-next-method
+                       var superpd = mpropdef.lookup_next_definition(v.mainmodule, arguments.first.mtype)
+                       v.call_without_varargs(superpd, arguments)
+               end
 
-               v.stmt(self.n_block)
-               v.frames.shift
-               if v.returnmark == f then
-                       v.returnmark = null
-                       var res = v.escapevalue
-                       v.escapevalue = null
-                       return res
+               if n_block != null then
+                       v.stmt(self.n_block)
+                       return null
+               else
+                       return intern_call(v, mpropdef, arguments)
                end
-               return null
        end
-end
 
-redef class AInternMethPropdef
-       redef fun call(v, mpropdef, args)
+       private fun intern_call(v: NaiveInterpreter, mpropdef: MMethodDef, args: Array[Instance]): nullable Instance
        do
                var pname = mpropdef.mproperty.name
                var cname = mpropdef.mclassdef.mclass.name
@@ -654,18 +696,17 @@ redef class AInternMethPropdef
                        return v.bool_instance(args[0] != args[1])
                else if pname == "is_same_type" then
                        return v.bool_instance(args[0].mtype == args[1].mtype)
+               else if pname == "is_same_instance" then
+                       return v.bool_instance(args[1] != null and args[0].eq_is(args[1]))
                else if pname == "exit" then
                        exit(args[1].to_i)
                        abort
                else if pname == "sys" then
                        return v.mainobj
                else if cname == "Int" then
+                       var recvval = args[0].to_i
                        if pname == "unary -" then
                                return v.int_instance(-args[0].to_i)
-                       else if pname == "succ" then
-                               return v.int_instance(args[0].to_i + 1)
-                       else if pname == "prec" then
-                               return v.int_instance(args[0].to_i - 1)
                        else if pname == "+" then
                                return v.int_instance(args[0].to_i + args[1].to_i)
                        else if pname == "-" then
@@ -694,15 +735,28 @@ redef class AInternMethPropdef
                                return v.int_instance(args[0].to_i.lshift(args[1].to_i))
                        else if pname == "rshift" then
                                return v.int_instance(args[0].to_i.rshift(args[1].to_i))
+                       else if pname == "rand" then
+                               var res = recvval.rand
+                               return v.int_instance(res)
+                       else if pname == "bin_and" then
+                               return v.int_instance(args[0].to_i.bin_and(args[1].to_i))
+                       else if pname == "bin_or" then
+                               return v.int_instance(args[0].to_i.bin_or(args[1].to_i))
+                       else if pname == "bin_xor" then
+                               return v.int_instance(args[0].to_i.bin_xor(args[1].to_i))
+                       else if pname == "native_int_to_s" then
+                               return v.native_string_instance(recvval.to_s)
+                       else if pname == "strerror_ext" then
+                               return v.native_string_instance(recvval.strerror)
                        end
                else if cname == "Char" then
                        var recv = args[0].val.as(Char)
                        if pname == "ascii" then
                                return v.int_instance(recv.ascii)
-                       else if pname == "succ" then
-                               return v.char_instance(recv.succ)
-                       else if pname == "prec" then
-                               return v.char_instance(recv.prec)
+                       else if pname == "successor" then
+                               return v.char_instance(recv.successor(args[1].to_i))
+                       else if pname == "predecessor" then
+                               return v.char_instance(recv.predecessor(args[1].to_i))
                        else if pname == "<" then
                                return v.bool_instance(recv < args[1].val.as(Char))
                        else if pname == ">" then
@@ -736,25 +790,58 @@ redef class AInternMethPropdef
                                return v.bool_instance(recv >= args[1].to_f)
                        else if pname == "to_i" then
                                return v.int_instance(recv.to_i)
+                       else if pname == "cos" then
+                               return v.float_instance(args[0].to_f.cos)
+                       else if pname == "sin" then
+                               return v.float_instance(args[0].to_f.sin)
+                       else if pname == "tan" then
+                               return v.float_instance(args[0].to_f.tan)
+                       else if pname == "acos" then
+                               return v.float_instance(args[0].to_f.acos)
+                       else if pname == "asin" then
+                               return v.float_instance(args[0].to_f.asin)
+                       else if pname == "atan" then
+                               return v.float_instance(args[0].to_f.atan)
+                       else if pname == "sqrt" then
+                               return v.float_instance(args[0].to_f.sqrt)
+                       else if pname == "exp" then
+                               return v.float_instance(args[0].to_f.exp)
+                       else if pname == "log" then
+                               return v.float_instance(args[0].to_f.log)
+                       else if pname == "pow" then
+                               return v.float_instance(args[0].to_f.pow(args[1].to_f))
+                       else if pname == "rand" then
+                               return v.float_instance(args[0].to_f.rand)
+                       else if pname == "abs" then
+                               return v.float_instance(args[0].to_f.abs)
+                       else if pname == "hypot_with" then
+                               return v.float_instance(args[0].to_f.hypot_with(args[1].to_f))
+                       else if pname == "is_nan" then
+                               return v.bool_instance(args[0].to_f.is_nan)
+                       else if pname == "is_inf_extern" then
+                               return v.bool_instance(args[0].to_f.is_inf != 0)
                        end
                else if cname == "NativeString" then
+                       if pname == "init" then
+                               return v.native_string_instance("!" * args[1].to_i)
+                       end
                        var recvval = args.first.val.as(Buffer)
                        if pname == "[]" then
                                var arg1 = args[1].to_i
                                if arg1 >= recvval.length or arg1 < 0 then
                                        debug("Illegal access on {recvval} for element {arg1}/{recvval.length}")
                                end
-                               return v.char_instance(recvval[arg1])
+                               return v.char_instance(recvval.chars[arg1])
                        else if pname == "[]=" then
                                var arg1 = args[1].to_i
                                if arg1 >= recvval.length or arg1 < 0 then
                                        debug("Illegal access on {recvval} for element {arg1}/{recvval.length}")
                                end
-                               recvval[arg1] = args[2].val.as(Char)
+                               recvval.chars[arg1] = args[2].val.as(Char)
                                return null
                        else if pname == "copy_to" then
                                # sig= copy_to(dest: NativeString, length: Int, from: Int, to: Int)
-                               var destval = args[1].val.as(Buffer)
+                               var destval = args[1].val.as(FlatBuffer)
                                var lenval = args[2].to_i
                                var fromval = args[3].to_i
                                var toval = args[4].to_i
@@ -770,14 +857,36 @@ redef class AInternMethPropdef
                                if toval + lenval >= destval.length then
                                        debug("Illegal access on {destval} for element {toval}+{lenval}/{destval.length}")
                                end
-                               recvval.copy(fromval, lenval, destval, toval)
+                               recvval.as(FlatBuffer).copy(fromval, lenval, destval, toval)
                                return null
                        else if pname == "atoi" then
                                return v.int_instance(recvval.to_i)
+                       else if pname == "file_exists" then
+                               return v.bool_instance(recvval.to_s.file_exists)
+                       else if pname == "file_mkdir" then
+                               recvval.to_s.mkdir
+                               return null
+                       else if pname == "file_chdir" then
+                               recvval.to_s.chdir
+                               return null
+                       else if pname == "file_realpath" then
+                               return v.native_string_instance(recvval.to_s.realpath)
+                       else if pname == "get_environ" then
+                               var txt = recvval.to_s.environ
+                               return v.native_string_instance(txt)
+                       else if pname == "system" then
+                               var res = sys.system(recvval.to_s)
+                               return v.int_instance(res)
+                       else if pname == "atof" then
+                               return v.float_instance(recvval.to_f)
                        end
                else if pname == "calloc_string" then
                        return v.native_string_instance("!" * args[1].to_i)
                else if cname == "NativeArray" then
+                       if pname == "init" then
+                               var val = new Array[Instance].filled_with(v.null_instance, args[1].to_i)
+                               return new PrimitiveInstance[Array[Instance]](args[0].mtype, val)
+                       end
                        var recvval = args.first.val.as(Array[Instance])
                        if pname == "[]" then
                                if args[1].to_i >= recvval.length or args[1].to_i < 0 then
@@ -787,134 +896,54 @@ redef class AInternMethPropdef
                        else if pname == "[]=" then
                                recvval[args[1].to_i] = args[2]
                                return null
+                       else if pname == "length" then
+                               return v.int_instance(recvval.length)
                        else if pname == "copy_to" then
                                recvval.copy(0, args[2].to_i, args[1].val.as(Array[Instance]), 0)
                                return null
                        end
-               else if pname == "calloc_array" then
-                       var recvtype = args.first.mtype.as(MClassType)
-                       var mtype: MType
-                       mtype = recvtype.supertype_to(v.mainmodule, recvtype, v.mainmodule.get_primitive_class("ArrayCapable"))
-                       mtype = mtype.arguments.first
-                       var val = new Array[Instance].filled_with(v.null_instance, args[1].to_i)
-                       return new PrimitiveInstance[Array[Instance]](v.mainmodule.get_primitive_class("NativeArray").get_mtype([mtype]), val)
-               else if pname == "native_argc" then
-                       return v.int_instance(v.arguments.length)
-               else if pname == "native_argv" then
-                       var txt = v.arguments[args[1].to_i]
-                       return v.native_string_instance(txt)
-               end
-               fatal(v, "NOT YET IMPLEMENTED intern {mpropdef}")
-               abort
-       end
-end
-
-redef class AbstractArray[E]
-       fun copy(start: Int, len: Int, dest: AbstractArray[E], new_start: Int)
-       do
-               self.copy_to(start, len, dest, new_start)
-       end
-end
-
-redef class AExternInitPropdef
-       redef fun call(v, mpropdef, args)
-       do
-               var pname = mpropdef.mproperty.name
-               var cname = mpropdef.mclassdef.mclass.name
-               if pname == "native_stdout" then
-                       return new PrimitiveInstance[OStream](mpropdef.mclassdef.mclass.mclass_type, stdout)
-               else if pname == "native_stdin" then
-                       return new PrimitiveInstance[IStream](mpropdef.mclassdef.mclass.mclass_type, stdin)
-               else if pname == "native_stderr" then
-                       return new PrimitiveInstance[OStream](mpropdef.mclassdef.mclass.mclass_type, stderr)
-               else if pname == "io_open_read" then
-                       var a1 = args[1].val.as(Buffer)
-                       return new PrimitiveInstance[IStream](mpropdef.mclassdef.mclass.mclass_type, new IFStream.open(a1.to_s))
-               else if pname == "io_open_write" then
-                       var a1 = args[1].val.as(Buffer)
-                       return new PrimitiveInstance[OStream](mpropdef.mclassdef.mclass.mclass_type, new OFStream.open(a1.to_s))
-               end
-               fatal(v, "NOT YET IMPLEMENTED extern init {mpropdef}")
-               abort
-       end
-end
-
-redef class AExternMethPropdef
-       super TablesCapable
-       redef fun call(v, mpropdef, args)
-       do
-               var pname = mpropdef.mproperty.name
-               var cname = mpropdef.mclassdef.mclass.name
-               if cname == "Int" then
-                       var recvval = args.first.val.as(Int)
-                       if pname == "rand" then
-                               var res = recvval.rand
-                               return v.int_instance(res)
-                       else if pname == "native_int_to_s" then
-                               return v.native_string_instance(recvval.to_s)
-                       end
                else if cname == "NativeFile" then
+                       if pname == "native_stdout" then
+                               return new PrimitiveInstance[OStream](mpropdef.mclassdef.mclass.mclass_type, sys.stdout)
+                       else if pname == "native_stdin" then
+                               return new PrimitiveInstance[IStream](mpropdef.mclassdef.mclass.mclass_type, sys.stdin)
+                       else if pname == "native_stderr" then
+                               return new PrimitiveInstance[OStream](mpropdef.mclassdef.mclass.mclass_type, sys.stderr)
+                       else if pname == "io_open_read" then
+                               var a1 = args[1].val.as(Buffer)
+                               return new PrimitiveInstance[IStream](mpropdef.mclassdef.mclass.mclass_type, new IFStream.open(a1.to_s))
+                       else if pname == "io_open_write" then
+                               var a1 = args[1].val.as(Buffer)
+                               return new PrimitiveInstance[OStream](mpropdef.mclassdef.mclass.mclass_type, new OFStream.open(a1.to_s))
+                       end
                        var recvval = args.first.val
                        if pname == "io_write" then
                                var a1 = args[1].val.as(Buffer)
-                               recvval.as(OStream).write(a1.substring(0, args[2].to_i))
+                               recvval.as(OStream).write(a1.substring(0, args[2].to_i).to_s)
                                return args[2]
                        else if pname == "io_read" then
                                var str = recvval.as(IStream).read(args[2].to_i)
                                var a1 = args[1].val.as(Buffer)
-                               new Buffer.from(str).copy(0, str.length, a1, 0)
+                               new FlatBuffer.from(str).copy(0, str.length, a1.as(FlatBuffer), 0)
                                return v.int_instance(str.length)
                        else if pname == "io_close" then
                                recvval.as(IOS).close
                                return v.int_instance(0)
+                       else if pname == "address_is_null" then
+                               return v.false_instance
                        end
-               else if cname == "NativeString" then
-                       var recvval = args.first.val.as(Buffer)
-                       if pname == "file_exists" then
-                               return v.bool_instance(recvval.to_s.file_exists)
-                       else if pname == "file_mkdir" then
-                               recvval.to_s.mkdir
-                               return null
-                       else if pname == "file_chdir" then
-                               recvval.to_s.chdir
-                               return null
-                       else if pname == "get_environ" then
-                               var txt = recvval.to_s.environ
-                               return v.native_string_instance(txt)
-                       else if pname == "system" then
-                               var res = sys.system(recvval.to_s)
-                               return v.int_instance(res)
-                       else if pname == "atof" then
-                               return v.float_instance(recvval.to_f)
-                       end
-               else if cname == "Int" then
-                       if pname == "rand" then
-                               return v.int_instance(args[0].to_i.rand)
-                       end
-               else if cname == "Float" then
-                       if pname == "cos" then
-                               return v.float_instance(args[0].to_f.cos)
-                       else if pname == "sin" then
-                               return v.float_instance(args[0].to_f.sin)
-                       else if pname == "tan" then
-                               return v.float_instance(args[0].to_f.tan)
-                       else if pname == "acos" then
-                               return v.float_instance(args[0].to_f.acos)
-                       else if pname == "asin" then
-                               return v.float_instance(args[0].to_f.asin)
-                       else if pname == "atan" then
-                               return v.float_instance(args[0].to_f.atan)
-                       else if pname == "sqrt" then
-                               return v.float_instance(args[0].to_f.sqrt)
-                       else if pname == "exp" then
-                               return v.float_instance(args[0].to_f.exp)
-                       else if pname == "log" then
-                               return v.float_instance(args[0].to_f.log)
-                       else if pname == "pow" then
-                               return v.float_instance(args[0].to_f.pow(args[1].to_f))
-                       else if pname == "rand" then
-                               return v.float_instance(args[0].to_f.rand)
-                       end
+               else if pname == "calloc_array" then
+                       var recvtype = args.first.mtype.as(MClassType)
+                       var mtype: MType
+                       mtype = recvtype.supertype_to(v.mainmodule, recvtype, v.mainmodule.get_primitive_class("ArrayCapable"))
+                       mtype = mtype.arguments.first
+                       var val = new Array[Instance].filled_with(v.null_instance, args[1].to_i)
+                       return new PrimitiveInstance[Array[Instance]](v.mainmodule.get_primitive_class("NativeArray").get_mtype([mtype]), val)
+               else if pname == "native_argc" then
+                       return v.int_instance(v.arguments.length)
+               else if pname == "native_argv" then
+                       var txt = v.arguments[args[1].to_i]
+                       return v.native_string_instance(txt)
                else if pname == "native_argc" then
                        return v.int_instance(v.arguments.length)
                else if pname == "native_argv" then
@@ -939,55 +968,77 @@ redef class AExternMethPropdef
                        return v.int_instance(parser_action(args[1].to_i, args[2].to_i))
                else if pname == "file_getcwd" then
                        return v.native_string_instance(getcwd)
+               else if pname == "errno" then
+                       return v.int_instance(sys.errno)
+               else if pname == "address_is_null" then
+                       return v.false_instance
+               end
+               if mpropdef.is_intern then
+                       fatal(v, "NOT YET IMPLEMENTED intern {mpropdef}")
+               else if mpropdef.is_extern then
+                       fatal(v, "NOT YET IMPLEMENTED extern {mpropdef}")
+               else
+                       fatal(v, "NOT YET IMPLEMENTED <wat?> {mpropdef}")
                end
-               fatal(v, "NOT YET IMPLEMENTED extern {mpropdef}")
                abort
        end
 end
 
+redef class AbstractArray[E]
+       fun copy(start: Int, len: Int, dest: AbstractArray[E], new_start: Int)
+       do
+               self.copy_to(start, len, dest, new_start)
+       end
+end
+
 redef class AAttrPropdef
        redef fun call(v, mpropdef, args)
        do
                var recv = args.first
                assert recv isa MutableInstance
                var attr = self.mpropdef.mproperty
-               if args.length == 1 then
-                       return v.read_attribute(attr, recv)
-               else
+               if mpropdef == mreadpropdef then
+                       assert args.length == 1
+                       if not is_lazy or v.isset_attribute(attr, recv) then return v.read_attribute(attr, recv)
+                       return evaluate_expr(v, recv)
+               else if mpropdef == mwritepropdef then
                        assert args.length == 2
-                       recv.attributes[attr] = args[1]
+                       v.write_attribute(attr, recv, args[1])
                        return null
+               else
+                       abort
                end
        end
 
        # Evaluate and set the default value of the attribute in `recv`
        private fun init_expr(v: NaiveInterpreter, recv: Instance)
        do
-               assert recv isa MutableInstance
+               if is_lazy then return
                var nexpr = self.n_expr
                if nexpr != null then
-                       var f = new Frame(self, self.mpropdef.as(not null), [recv])
-                       v.frames.unshift(f)
-                       var val = v.expr(nexpr)
-                       assert val != null
-                       v.frames.shift
-                       assert not v.is_escaping
-                       recv.attributes[self.mpropdef.mproperty] = val
+                       evaluate_expr(v, recv)
                        return
                end
                var mtype = self.mpropdef.static_mtype.as(not null)
                mtype = mtype.anchor_to(v.mainmodule, recv.mtype.as(MClassType))
                if mtype isa MNullableType then
-                       recv.attributes[self.mpropdef.mproperty] = v.null_instance
+                       v.write_attribute(self.mpropdef.mproperty, recv, v.null_instance)
                end
        end
-end
 
-redef class ADeferredMethPropdef
-       redef fun call(v, mpropdef, args)
+       private fun evaluate_expr(v: NaiveInterpreter, recv: Instance): Instance
        do
-               fatal(v, "Deferred method called")
-               abort
+               assert recv isa MutableInstance
+               var nexpr = self.n_expr
+               assert nexpr != null
+               var f = new Frame(self, self.mpropdef.as(not null), [recv])
+               v.frames.unshift(f)
+               var val = v.expr(nexpr)
+               assert val != null
+               v.frames.shift
+               assert not v.is_escaping
+               v.write_attribute(self.mpropdef.mproperty, recv, val)
+               return val
        end
 end
 
@@ -997,19 +1048,19 @@ redef class AClassdef
        do
                var super_inits = self.super_inits
                if super_inits != null then
-                       assert args.length == 1
+                       var args_of_super = args
+                       if args.length > 1 then args_of_super = [args.first]
                        for su in super_inits do
-                               v.send(su, args)
+                               v.send(su, args_of_super)
                        end
-                       return null
                end
                var recv = args.first
                assert recv isa MutableInstance
                var i = 1
                # Collect undefined attributes
                for npropdef in self.n_propdefs do
-                       if npropdef isa AAttrPropdef and npropdef.n_expr == null then
-                               recv.attributes[npropdef.mpropdef.mproperty] = args[i]
+                       if npropdef isa AAttrPropdef and not npropdef.noinit and npropdef.n_expr == null then
+                               v.write_attribute(npropdef.mpropdef.mproperty, recv, args[i])
                                i += 1
                        end
                end
@@ -1094,7 +1145,7 @@ redef class AVarReassignExpr
                var vari = v.frame.map[self.variable.as(not null)]
                var value = v.expr(self.n_value)
                if value == null then return
-               var res = v.send(reassign_property.mproperty, [vari, value])
+               var res = v.callsite(reassign_callsite, [vari, value])
                assert res != null
                v.frame.map[self.variable.as(not null)] = res
        end
@@ -1231,20 +1282,22 @@ redef class AForExpr
        do
                var col = v.expr(self.n_expr)
                if col == null then return
+               if col.mtype isa MNullType then fatal(v, "Receiver is null")
+
                #self.debug("col {col}")
-               var iter = v.send(v.force_get_primitive_method("iterator", col.mtype), [col]).as(not null)
+               var iter = v.callsite(method_iterator, [col]).as(not null)
                #self.debug("iter {iter}")
                loop
-                       var isok = v.send(v.force_get_primitive_method("is_ok", iter.mtype), [iter]).as(not null)
+                       var isok = v.callsite(method_is_ok, [iter]).as(not null)
                        if not isok.is_true then return
                        if self.variables.length == 1 then
-                               var item = v.send(v.force_get_primitive_method("item", iter.mtype), [iter]).as(not null)
+                               var item = v.callsite(method_item, [iter]).as(not null)
                                #self.debug("item {item}")
                                v.frame.map[self.variables.first] = item
                        else if self.variables.length == 2 then
-                               var key = v.send(v.force_get_primitive_method("key", iter.mtype), [iter]).as(not null)
+                               var key = v.callsite(method_key, [iter]).as(not null)
                                v.frame.map[self.variables[0]] = key
-                               var item = v.send(v.force_get_primitive_method("item", iter.mtype), [iter]).as(not null)
+                               var item = v.callsite(method_item, [iter]).as(not null)
                                v.frame.map[self.variables[1]] = item
                        else
                                abort
@@ -1253,7 +1306,7 @@ redef class AForExpr
                        if v.is_break(self.escapemark) then return
                        v.is_continue(self.escapemark) # Clear the break
                        if v.is_escaping then return
-                       v.send(v.force_get_primitive_method("next", iter.mtype), [iter])
+                       v.callsite(method_next, [iter])
                end
        end
 end
@@ -1326,17 +1379,6 @@ redef class AOrElseExpr
        end
 end
 
-redef class AEeExpr
-       redef fun expr(v)
-       do
-               var i = v.expr(self.n_expr)
-               if i == null then return null
-               var i2 = v.expr(self.n_expr2)
-               if i2 == null then return null
-               return v.bool_instance(i.eq_is(i2))
-       end
-end
-
 redef class AIntExpr
        redef fun expr(v)
        do
@@ -1409,8 +1451,7 @@ redef class ACrangeExpr
                var mtype = v.unanchor_type(self.mtype.as(not null))
                var res = new MutableInstance(mtype)
                v.init_instance(res)
-               v.send(v.force_get_primitive_method("init", mtype), [res, e1, e2])
-               v.check_init_instance(res)
+               v.callsite(init_callsite, [res, e1, e2])
                return res
        end
 end
@@ -1425,8 +1466,7 @@ redef class AOrangeExpr
                var mtype = v.unanchor_type(self.mtype.as(not null))
                var res = new MutableInstance(mtype)
                v.init_instance(res)
-               v.send(v.force_get_primitive_method("without_last", mtype), [res, e1, e2])
-               v.check_init_instance(res)
+               v.callsite(init_callsite, [res, e1, e2])
                return res
        end
 end
@@ -1467,10 +1507,10 @@ redef class AAsCastExpr
        do
                var i = v.expr(self.n_expr)
                if i == null then return null
-               var mtype = v.unanchor_type(self.mtype.as(not null))
-               if not v.is_subtype(i.mtype, mtype) then
-                       #fatal(v, "Cast failed expected {mtype}, got {i}")
-                       fatal(v, "Cast failed")
+               var mtype = self.mtype.as(not null)
+               var amtype = v.unanchor_type(mtype)
+               if not v.is_subtype(i.mtype, amtype) then
+                       fatal(v, "Cast failed. Expected `{amtype}`, got `{i.mtype}`")
                end
                return i
        end
@@ -1516,14 +1556,13 @@ redef class ASendExpr
                var recv = v.expr(self.n_expr)
                if recv == null then return null
                var args = [recv]
-               for a in self.raw_arguments.as(not null) do
+               for a in self.raw_arguments do
                        var i = v.expr(a)
                        if i == null then return null
                        args.add(i)
                end
-               var mproperty = self.mproperty.as(not null)
 
-               var res = v.send(mproperty, args)
+               var res = v.callsite(callsite, args)
                return res
        end
 end
@@ -1534,7 +1573,7 @@ redef class ASendReassignFormExpr
                var recv = v.expr(self.n_expr)
                if recv == null then return
                var args = [recv]
-               for a in self.raw_arguments.as(not null) do
+               for a in self.raw_arguments do
                        var i = v.expr(a)
                        if i == null then return
                        args.add(i)
@@ -1542,16 +1581,15 @@ redef class ASendReassignFormExpr
                var value = v.expr(self.n_value)
                if value == null then return
 
-               var mproperty = self.mproperty.as(not null)
-               var read = v.send(mproperty, args)
+               var read = v.callsite(callsite, args)
                assert read != null
 
-               var write = v.send(self.reassign_property.mproperty, [read, value])
+               var write = v.callsite(reassign_callsite, [read, value])
                assert write != null
 
                args.add(write)
 
-               v.send(self.write_mproperty.as(not null), args)
+               v.callsite(write_callsite, args)
        end
 end
 
@@ -1565,24 +1603,27 @@ redef class ASuperExpr
                        if i == null then return null
                        args.add(i)
                end
-               if args.length == 1 then
-                       args = v.frame.arguments
-               end
 
-               var mproperty = self.mproperty
-               if mproperty != null then
-                       if mproperty.intro.msignature.arity == 0 then
-                               args = [recv]
+               var callsite = self.callsite
+               if callsite != null then
+                       # Add additionnals arguments for the super init call
+                       if args.length == 1 then
+                               for i in [0..callsite.msignature.arity[ do
+                                       args.add(v.frame.arguments[i+1])
+                               end
                        end
                        # Super init call
-                       var res = v.send(mproperty, args)
+                       var res = v.callsite(callsite, args)
                        return res
                end
 
+               if args.length == 1 then
+                       args = v.frame.arguments
+               end
+
                # stantard call-next-method
-               var mpropdef = v.frame.mpropdef
+               var mpropdef = self.mpropdef
                mpropdef = mpropdef.lookup_next_definition(v.mainmodule, recv.mtype)
-               assert mpropdef isa MMethodDef
                var res = v.call_without_varargs(mpropdef, args)
                return res
        end
@@ -1600,13 +1641,11 @@ redef class ANewExpr
                        if i == null then return null
                        args.add(i)
                end
-               var mproperty = self.mproperty.as(not null)
-               var res2 = v.send(mproperty, args)
+               var res2 = v.callsite(callsite, args)
                if res2 != null then
                        #self.debug("got {res2} from {mproperty}. drop {recv}")
                        return res2
                end
-               v.check_init_instance(recv)
                return recv
        end
 end
@@ -1616,7 +1655,7 @@ redef class AAttrExpr
        do
                var recv = v.expr(self.n_expr)
                if recv == null then return null
-               if recv.mtype isa MNullType then fatal(v, "Reciever is null")
+               if recv.mtype isa MNullType then fatal(v, "Receiver is null")
                var mproperty = self.mproperty.as(not null)
                return v.read_attribute(mproperty, recv)
        end
@@ -1627,12 +1666,11 @@ redef class AAttrAssignExpr
        do
                var recv = v.expr(self.n_expr)
                if recv == null then return
-               if recv.mtype isa MNullType then fatal(v, "Reciever is null")
+               if recv.mtype isa MNullType then fatal(v, "Receiver is null")
                var i = v.expr(self.n_value)
                if i == null then return
                var mproperty = self.mproperty.as(not null)
-               assert recv isa MutableInstance
-               recv.attributes[mproperty] = i
+               v.write_attribute(mproperty, recv, i)
        end
 end
 
@@ -1641,15 +1679,14 @@ redef class AAttrReassignExpr
        do
                var recv = v.expr(self.n_expr)
                if recv == null then return
-               if recv.mtype isa MNullType then fatal(v, "Reciever is null")
+               if recv.mtype isa MNullType then fatal(v, "Receiver is null")
                var value = v.expr(self.n_value)
                if value == null then return
                var mproperty = self.mproperty.as(not null)
                var attr = v.read_attribute(mproperty, recv)
-               var res = v.send(reassign_property.mproperty, [attr, value])
+               var res = v.callsite(reassign_callsite, [attr, value])
                assert res != null
-               assert recv isa MutableInstance
-               recv.attributes[mproperty] = res
+               v.write_attribute(mproperty, recv, res)
        end
 end
 
@@ -1658,10 +1695,9 @@ redef class AIssetAttrExpr
        do
                var recv = v.expr(self.n_expr)
                if recv == null then return null
-               if recv.mtype isa MNullType then fatal(v, "Reciever is null")
+               if recv.mtype isa MNullType then fatal(v, "Receiver is null")
                var mproperty = self.mproperty.as(not null)
-               assert recv isa MutableInstance
-               return v.bool_instance(recv.attributes.has_key(mproperty))
+               return v.bool_instance(v.isset_attribute(mproperty, recv))
        end
 end