import literal
import typing
import auto_super_init
+import frontend
redef class ToolContext
# --discover-call-trace
end
redef class ModelBuilder
- # Execute the program from the entry point (Sys::main) of the `mainmodule'
- # `arguments' are the command-line arguments in order
+ # Execute the program from the entry point (`Sys::main`) of the `mainmodule`
+ # `arguments` are the command-line arguments in order
# REQUIRE that:
# 1. the AST is fully loaded.
# 2. the model is fully built.
var mainobj = new MutableInstance(sys_type)
interpreter.mainobj = mainobj
interpreter.init_instance(mainobj)
- var initprop = mainmodule.try_get_primitive_method("init", sys_type)
+ var initprop = mainmodule.try_get_primitive_method("init", sys_type.mclass)
if initprop != null then
interpreter.send(initprop, [mainobj])
end
interpreter.check_init_instance(mainobj)
- var mainprop = mainmodule.try_get_primitive_method("main", sys_type)
+ var mainprop = mainmodule.try_get_primitive_method("main", sys_type.mclass)
if mainprop != null then
interpreter.send(mainprop, [mainobj])
end
fun force_get_primitive_method(name: String, recv: MType): MMethod
do
- return self.modelbuilder.force_get_primitive_method(self.frame.current_node, name, recv, self.mainmodule)
+ assert recv isa MClassType
+ return self.modelbuilder.force_get_primitive_method(self.frame.current_node, name, recv.mclass, self.mainmodule)
end
# Is a return executed?
var returnmark: nullable Frame = null
# Is a break executed?
- # Set this mark to skip the evaluation until a labeled statement catch it with `is_break'
+ # Set this mark to skip the evaluation until a labeled statement catch it with `is_break`
var breakmark: nullable EscapeMark = null
# Is a continue executed?
- # Set this mark to skip the evaluation until a labeled statement catch it with `is_continue'
+ # Set this mark to skip the evaluation until a labeled statement catch it with `is_continue`
var continuemark: nullable EscapeMark = null
# Is a return or a break or a continue executed?
# Read the value when you catch a mark or reach the end of a method
var escapevalue: nullable Instance = null
- # If there is a break and is associated with `escapemark', then return true an clear the mark.
- # If there is no break or if `escapemark' is null then return false.
+ # If there is a break and is associated with `escapemark`, then return true an clear the mark.
+ # If there is no break or if `escapemark` is null then return false.
# Use this function to catch a potential break.
fun is_break(escapemark: nullable EscapeMark): Bool
do
end
end
- # If there is a continue and is associated with `escapemark', then return true an clear the mark.
- # If there is no continue or if `escapemark' is null then return false.
+ # If there is a continue and is associated with `escapemark`, then return true an clear the mark.
+ # If there is no continue or if `escapemark` is null then return false.
# Use this function to catch a potential continue.
fun is_continue(escapemark: nullable EscapeMark): Bool
do
end
end
- # Evaluate `n' as an expression in the current context.
+ # Evaluate `n` as an expression in the current context.
# Return the value of the expression.
- # If `n' cannot be evaluated, then aborts.
+ # If `n` cannot be evaluated, then aborts.
fun expr(n: AExpr): nullable Instance
do
var frame = self.frame
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}")
return i
end
- # Evaluate `n' as a statement in the current context.
- # Do nothing if `n' is sull.
- # If `n' cannot be evaluated, then aborts.
+ # Evaluate `n` as a statement in the current context.
+ # Do nothing if `n` is null.
+ # If `n` cannot be evaluated, then aborts.
fun stmt(n: nullable AExpr)
do
if n != null then
end
end
- # Map used to store values of nodes that must be evaluated once in the system (AOnceExpr)
+ # Map used to store values of nodes that must be evaluated once in the system (`AOnceExpr`)
var onces: Map[ANode, Instance] = new HashMap[ANode, Instance]
- # Return the boolean instance associated with `val'.
+ # Return the boolean instance associated with `val`.
fun bool_instance(val: Bool): Instance
do
if val then return self.true_instance else return self.false_instance
end
- # Return the integer instance associated with `val'.
+ # Return the integer instance associated with `val`.
fun int_instance(val: Int): Instance
do
var ic = self.mainmodule.get_primitive_class("Int")
return new PrimitiveInstance[Int](ic.mclass_type, val)
end
- # Return the char instance associated with `val'.
+ # Return the char instance associated with `val`.
fun char_instance(val: Char): Instance
do
var ic = self.mainmodule.get_primitive_class("Char")
return new PrimitiveInstance[Char](ic.mclass_type, val)
end
- # Return the float instance associated with `val'.
+ # Return the float instance associated with `val`.
fun float_instance(val: Float): Instance
do
var ic = self.mainmodule.get_primitive_class("Float")
return new PrimitiveInstance[Float](ic.mclass_type, val)
end
- # The unique intance of the `true' value.
+ # The unique intance of the `true` value.
var true_instance: Instance
- # The unique intance of the `false' value.
+ # The unique intance of the `false` value.
var false_instance: Instance
- # The unique intance of the `null' value.
+ # The unique intance of the `null` value.
var null_instance: Instance
- # Return a new array made of `values'.
+ # Return a new array made of `values`.
# The dynamic type of the result is Array[elttype].
fun array_instance(values: Array[Instance], elttype: MType): Instance
do
return res
end
- # Return a new native string initialized with `txt'
+ # Return a new native string initialized with `txt`
fun native_string_instance(txt: String): Instance
do
var val = new Buffer.from(txt)
# 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-bindng.
+ # 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
- if self.modelbuilder.toolcontext.opt_discover_call_trace.value and not self.discover_call_trace.has(mpropdef) then
- self.discover_call_trace.add mpropdef
- self.debug("Discovered {mpropdef}")
- end
var vararg_rank = mpropdef.msignature.vararg_rank
if vararg_rank >= 0 then
assert args.length >= mpropdef.msignature.arity + 1 # because of self
args.add(rawargs[i+1])
end
end
- if args.length < mpropdef.msignature.arity + 1 or args.length > mpropdef.msignature.arity + 1 + mpropdef.msignature.mclosures.length then
- fatal("NOT YET IMPLEMENTED: Invalid arity for {mpropdef}. {args.length} arguments given.")
+ return call_without_varargs(mpropdef, args)
+ end
+
+ # Common code to call and this function
+ #
+ # Call only executes the variadic part, this avoids
+ # double encapsulation of variadic parameters into an Array
+ fun call_without_varargs(mpropdef: MMethodDef, args: Array[Instance]): nullable Instance
+ do
+ if self.modelbuilder.toolcontext.opt_discover_call_trace.value and not self.discover_call_trace.has(mpropdef) then
+ self.discover_call_trace.add mpropdef
+ self.debug("Discovered {mpropdef}")
end
- if args.length < mpropdef.msignature.arity + 1 + mpropdef.msignature.mclosures.length then
- fatal("NOT YET IMPLEMENTED: default closures")
+ 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
# Look for the AST node that implements the property
# 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
- fun call_closure(closure: ClosureInstance, args: Array[Instance]): nullable Instance
- do
- var nclosuredef = closure.nclosuredef
- var f = closure.frame
- for i in [0..closure.nclosuredef.mclosure.mtype.as(MSignature).arity[ do
- var variable = nclosuredef.variables[i]
- f.map[variable] = args[i]
- end
-
- self.frames.unshift(f)
-
- self.stmt(nclosuredef.n_expr)
-
- self.frames.shift
-
- if self.is_continue(nclosuredef.escapemark) then
- var res = self.escapevalue
- self.escapevalue = null
- return res
- end
- return null
- 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.
+ # 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
return self.call(propdef, args)
end
- # Read the attribute `mproperty' of an instance `recv' and return its value.
+ # Read the attribute `mproperty` of an instance `recv` and return its value.
# If the attribute in not yet initialized, then aborts with an error message.
fun read_attribute(mproperty: MAttribute, recv: Instance): Instance
do
var collect_attr_propdef_cache = new HashMap[MType, Array[AAttrPropdef]]
- # Fill the initial values of the newly created instance `recv'.
- # `recv.mtype' is used to know what must be filled.
+ # Fill the initial values of the newly created instance `recv`.
+ # `recv.mtype` is used to know what must be filled.
fun init_instance(recv: Instance)
do
for npropdef in collect_attr_propdef(recv.mtype) do
end
end
- # Check that non nullable attributes of `recv' are correctly initialized.
+ # Check that non nullable attributes of `recv` are correctly initialized.
# This function is used as the last instruction of a new
- # FIXME: this will work better once there is nullable types
fun check_init_instance(recv: Instance)
do
if not recv isa MutableInstance then return
# else aborts
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
+ # Return true if `self` IS `o` (using the Nit semantic of is)
+ 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}"
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})"
redef fun to_f do return val.as(Float)
end
-private class ClosureInstance
- super Instance
-
- var frame: Frame
-
- var nclosuredef: AClosureDef
-
- init(mtype: MType, frame: Frame, nclosuredef: AClosureDef)
- do
- super(mtype)
- self.frame = frame
- self.nclosuredef = nclosuredef
- end
-end
-
# Information about local variables in a running method
private class Frame
# The current visited node
redef class ANode
# Aborts the program with a message
- # `v' is used to know if a colored message is displayed or not
+ # `v` is used to know if a colored message is displayed or not
private fun fatal(v: NaiveInterpreter, message: String)
do
if v.modelbuilder.toolcontext.opt_no_color.value == true then
end
redef class APropdef
- # Execute a `mpropdef' associated with the current node.
+ # Execute a `mpropdef` associated with the current node.
private fun call(v: NaiveInterpreter, mpropdef: MMethodDef, args: Array[Instance]): nullable Instance
do
fatal(v, "NOT YET IMPLEMENTED method kind {class_name}. {mpropdef}")
assert variable != null
f.map[variable] = args[i+1]
end
- for i in [0..mpropdef.msignature.mclosures.length[ do
- var c = mpropdef.msignature.mclosures[i]
- var variable = self.n_signature.n_closure_decls[i].variable
- assert variable != null
- f.map[variable] = args[i + 1 + mpropdef.msignature.arity]
- end
v.frames.unshift(f)
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
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
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
var recvval = args.first.val
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)
return v.int_instance(parser_goto(args[1].to_i, args[2].to_i))
else if pname == "parser_action" then
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)
end
fatal(v, "NOT YET IMPLEMENTED extern {mpropdef}")
abort
end
end
- # Evaluate and set the default value of the attribute in `recv'
+ # Evaluate and set the default value of the attribute in `recv`
private fun init_expr(v: NaiveInterpreter, recv: Instance)
do
assert recv isa MutableInstance
return
end
var mtype = self.mpropdef.static_mtype.as(not null)
- # TODO The needinit info is statically computed, move it to modelbuilder or whatever
- mtype = mtype.resolve_for(self.mpropdef.mclassdef.bound_mtype, self.mpropdef.mclassdef.bound_mtype, self.mpropdef.mclassdef.mmodule, true)
+ mtype = mtype.anchor_to(v.mainmodule, recv.mtype.as(MClassType))
if mtype isa MNullableType then
recv.attributes[self.mpropdef.mproperty] = v.null_instance
end
redef class ADeferredMethPropdef
redef fun call(v, mpropdef, args)
do
- fatal(v, "Deferred method called")
+ fatal(v, "Abstract method `{mpropdef.mproperty.name}` called on `{args.first.mtype}`")
abort
end
end
redef class AClassdef
- # Execute an implicit `mpropdef' associated with the current node.
+ # Execute an implicit `mpropdef` associated with the current node.
private fun call(v: NaiveInterpreter, mpropdef: MMethodDef, args: Array[Instance]): nullable Instance
do
var super_inits = self.super_inits
redef class AExpr
# Evaluate the node as a possible expression.
# Return a possible value
- # NOTE: Do not call this method directly, but use `v.expr'
+ # NOTE: Do not call this method directly, but use `v.expr`
# This method is here to be implemented by subclasses.
private fun expr(v: NaiveInterpreter): nullable Instance
do
end
# Evaluate the node as a statement.
- # NOTE: Do not call this method directly, but use `v.stmt'
+ # NOTE: Do not call this method directly, but use `v.stmt`
# This method is here to be implemented by subclasses (no need to return something).
private fun stmt(v: NaiveInterpreter)
do
end
redef class ABlockExpr
+ redef fun expr(v)
+ do
+ var last = self.n_expr.last
+ for e in self.n_expr do
+ if e == last then break
+ v.stmt(e)
+ if v.is_escaping then return null
+ end
+ return last.expr(v)
+ end
+
redef fun stmt(v)
do
for e in self.n_expr do
end
redef class AVarAssignExpr
- redef fun stmt(v)
+ redef fun expr(v)
do
var i = v.expr(self.n_value)
- if i == null then return
+ if i == null then return null
v.frame.map[self.variable.as(not null)] = i
+ return i
end
end
end
redef class AIfExpr
+ redef fun expr(v)
+ do
+ var cond = v.expr(self.n_expr)
+ if cond == null then return null
+ if cond.is_true then
+ return v.expr(self.n_then.as(not null))
+ else
+ return v.expr(self.n_else.as(not null))
+ end
+ end
+
redef fun stmt(v)
do
var cond = v.expr(self.n_expr)
end
end
+redef class AImpliesExpr
+ redef fun expr(v)
+ do
+ var cond = v.expr(self.n_expr)
+ if cond == null then return null
+ if not cond.is_true then return v.true_instance
+ return v.expr(self.n_expr2)
+ end
+end
+
redef class AAndExpr
redef fun expr(v)
do
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
do
var txt = self.value.as(not null)
var nat = v.native_string_instance(txt)
- var res = new MutableInstance(v.mainmodule.get_primitive_class("String").mclass_type)
- v.init_instance(res)
- v.send(v.force_get_primitive_method("from_cstring", res.mtype), [res, nat])
- v.check_init_instance(res)
+ var res = v.send(v.force_get_primitive_method("to_s", nat.mtype), [nat]).as(not null)
return res
end
end
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
if i == null then return null
args.add(i)
end
- for c in self.n_closure_defs do
- var mtype = c.mclosure.mtype
- var instance = new ClosureInstance(mtype, v.frame, c)
- args.add(instance)
- end
var mproperty = self.mproperty.as(not null)
var res = v.send(mproperty, args)
- if v.is_break(self.escapemark) then
- res = v.escapevalue
- v.escapevalue = null
- end
return res
end
end
# stantard call-next-method
var mpropdef = v.frame.mpropdef
- # FIXME: we do not want an ugly static call!
mpropdef = mpropdef.lookup_next_definition(v.mainmodule, recv.mtype)
assert mpropdef isa MMethodDef
- var res = v.call(mpropdef, args)
+ var res = v.call_without_varargs(mpropdef, args)
return res
end
end
end
end
-redef class AClosureCallExpr
- redef fun expr(v)
- do
- var args = new Array[Instance]
- for a in self.n_args.n_exprs do
- var i = v.expr(a)
- if i == null then return null
- args.add(i)
- end
- var i = v.frame.map[self.variable.as(not null)]
- assert i isa ClosureInstance
- var res = v.call_closure(i, args)
- return res
- end
-end
-
redef class ADebugTypeExpr
redef fun stmt(v)
do
nitlanguage / nit.git / blobdiff