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js-main.k
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js-main.k
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require "js-trans.k"
require "js-str-numeric-literal.k"
require "js-prelude.k"
module JS-SYNTAX
imports JS-ORIG-SYNTAX
imports JS-STR-NUMERIC-LITERAL
endmodule
module JS-MAIN
imports JS-SYNTAX
imports JS-TRANS
imports JS-PRELUDE
//////////////////////////////////////////////////////////////////////////////
// Configuration
//////////////////////////////////////////////////////////////////////////////
syntax KItem ::= "@Run" "(" Stmt ")"
rule @Run(Pgm:Stmt) => @EnterGlobalCode(Pgm) ~> Pgm
configuration
<T>
<k> @InitConfig ~> @LoadConfig ~> @Run(^SourceElements($PGM:SourceElements)) </k>
<objs map="">
// 8.6 The Object Type
<obj multiplicity="*">
<oid key=""> .K </oid> // Oid
<properties> .Map </properties> // Var -> PropertyDescriptor
<internalProperties> .Map </internalProperties> // Var -> PropertyDescriptor
</obj>
</objs>
<envs map="">
// 10.2 Lexical Environments
<env multiplicity="*">
<eid key=""> .K </eid> // Eid
<outer> .K </outer> // Eid // Reference to an outer Lexical Environment
<strict> .K </strict> // Bool
// 10.2.1 Environment Records
// Either declarative or object environment record
// 10.2.1.1 Declarative Environment Records
<declEnvRec multiplicity="?"> .Map </declEnvRec> // Var -> ValEnv
// 10.2.1.2 Object Environment Records
<objEnvRec multiplicity="?">
<bindingObj> .K </bindingObj> // Oid
<provideThis> .K </provideThis> // Bool
</objEnvRec>
</env>
</envs>
<ctrl>
// 10.3 Execution Contexts
<ctx>
// Active Execution Contexts
<activeStack> .List </activeStack>
// Running Execution Context
<running>
// Table 19 Execution Context State Components
<lexicalEnv> .K </lexicalEnv> // Eid
<thisBinding> .K </thisBinding> // Oid + Undefined
<lastNonEmptyValue> .K </lastNonEmptyValue> // Val // last non-empty stmt value to be used by eval
</running>
</ctx>
<excStack> .List </excStack>
<pseudoCtx>
<pseudoStack> .List </pseudoStack>
<pseudoEnv> .Map </pseudoEnv>
</pseudoCtx>
</ctrl>
<in stream="stdin"> .List </in>
<out stream="stdout"> .List </out>
<log> .List </log>
</T>
// <properties>
// 8.6.1 Property Attribute
// 8.10 The Property Descriptor and Property Identifier Specification Types
syntax PropertyDescriptor ::= "@desc" "(" Map ")"
syntax Val ::= PropertyDescriptor
// <declEnvRec>
syntax Val ::= "@ve" "(" Val "," Bool "," Bool "," Bool ")" // ValEnv = Value * Initialized * Mutable * Deletable
// <activeStack>
syntax KItem ::= "@active" "(" RunningCellFragment ")"
// <excStack>
syntax KItem ::= "@excTC" "(" Var "," Stmt "," K "," CtrlCellFragment ")"
| "@excTF" "(" Stmt "," K "," CtrlCellFragment ")"
| "@excTCF" "(" Var "," Stmt "," Stmt "," K "," CtrlCellFragment ")"
// <pseudoStack>
syntax KItem ::= "@pseudo" "(" K "," Map ")"
//////////////////////////////////////////////////////////////////////////////
// Values
//////////////////////////////////////////////////////////////////////////////
// KResult 8 Types
// Undefined 8.1 The Undefined Type
// @NullVal 8.2 The Null Type
// Bool 8.3 The Boolean Type
// String 8.4 The String Type
// Number 8.5 The Number Type
// Oid 8.6 The Object Type
// Reference 8.7 The Reference Specification Type
// Vals 8.8 The List Specification Type
// CompletionType 8.9 The Completion Specification Type
// PropertyDescriptor 8.10 The Property Descriptor and Property Identifier Specification Types
// Eid 8.11 The Lexical Environment and Environment Record Specification Types
// 8.8 The List Specification Type
syntax Vals ::= "@Cons" "(" Val "," Vals ")"
| "@Nil"
syntax Val ::= UndefinedType // "Undefined" // 8.1 The Undefined Type
| NullType // "@NullVal" // 8.2 The Null Type
| Primitive
| Oid
//| Reference // NOTE: We made it using isVal
// 8.6 The Object Type
syntax Oid ::= "@o" "(" Int ")" [smtlib(smt_pointer_object)]
| "@NullOid"
// 8.11 The Lexical Environment and Environment Record Specification Types
syntax Eid ::= "@e" "(" Int ")"
| "@NullEid"
syntax UndefinedType ::= "Undefined" // 8.1 The Undefined Type
syntax NullType ::= "@NullVal" [smtlib(smt_pointer_null)] // 8.2 The Null Type
syntax Primitive ::= Bool // 8.3 The Boolean Type
| String // 8.4 The String Type
| Number
// 8.5 The Number Type
syntax Number ::= Int
| Float
| "@nz" // negative zero: -0 // TODO: make it systematically using artifical number type with explicit sign
| "@NaN"
| "@+Infinity"
| "@-Infinity"
syntax Float ::= "@MAX_VALUE"
rule @MAX_VALUE => 1.7976931348623157e308 [macro]
//
syntax Float ::= "@MIN_VALUE"
rule @MIN_VALUE => 4.9e-324 [macro]
// Subsorts information
syntax Exps ::= Vals
syntax Exp ::= Val
syntax KResult ::= Vals
| Val
// TODO: Check if it is correct
syntax KResult ::= Var
| Eid
// 8.9 The Completion Specification Type
syntax CompletionType ::= CompletionTypeNormal
| CompletionTypeAbrupt
syntax CompletionTypeNormal ::= "@Normal"
syntax CompletionTypeAbrupt ::= CompletionTypeGoto
| CompletionTypeReturn
syntax CompletionTypeGoto ::= "@Break" "(" Var ")"
| "@Continue" "(" Var ")"
syntax CompletionTypeReturn ::= "@Return" "(" Val ")"
syntax KItem ::= "@Throw" "(" K /* Val */ ")" [seqstrict] // NOTE: @Throw is no longer a completion type. Rather, we use another exception handling mechanism.
syntax KResult ::= CompletionType
syntax Stmt ::= CompletionType
// TODO: check if we can describe without following
syntax KResult ::= "@m" "(" Map ")"
syntax KResult ::= "@s" "(" Set ")"
//////////////////////////////////////////////////////////////////////////////
// Initializing Configuration
//////////////////////////////////////////////////////////////////////////////
#include "js-init-configuration.k"
syntax KItem /* .K */ ::= "@LoadConfig"
rule <k> @LoadConfig => . ... </k>
#include "js-config.k"
//////////////////////////////////////////////////////////////////////////////
// 7.6.1 Reserved Words
//////////////////////////////////////////////////////////////////////////////
// TODO: This should have been used by a front-end such as 'js-trans.k' so that we can distinguish between 'Name' and 'String', both are 'PropertyName'.
syntax KItem ::= "@CheckReserved" "(" K /* Bool */ "," K /* Var */ ")" [seqstrict]
rule @CheckReserved(Strict:Bool, X:Var)
=> BEGIN
If #@IsReservedWord(Strict,X) = true then {
Do @Throw(@SyntaxError("A reserved word cannot be used as an identifier",X));
};
END
syntax Bool ::= "#@IsReservedWord" "(" Bool "," Var ")" [function]
rule #@IsReservedWord(Strict:Bool, X:Var)
=> #@IsKeyword(X)
orBool #@IsFutureReservedWord(X)
orBool (Strict andBool #@IsFutureReservedWordInStrictMode(X))
orBool (X ==K "null")
orBool (X ==K "true")
orBool (X ==K "false")
syntax Bool ::= "#@IsKeyword" "(" Var ")" [function]
rule #@IsKeyword(X:Var)
=> (X ==K "break")
orBool (X ==K "case")
orBool (X ==K "catch")
orBool (X ==K "continue")
orBool (X ==K "debugger")
orBool (X ==K "default")
orBool (X ==K "delete")
orBool (X ==K "do")
orBool (X ==K "else")
orBool (X ==K "finally")
orBool (X ==K "for")
orBool (X ==K "function")
orBool (X ==K "if")
orBool (X ==K "in")
orBool (X ==K "instanceof")
orBool (X ==K "new")
orBool (X ==K "return")
orBool (X ==K "switch")
orBool (X ==K "this")
orBool (X ==K "throw")
orBool (X ==K "try")
orBool (X ==K "typeof")
orBool (X ==K "var")
orBool (X ==K "void")
orBool (X ==K "while")
orBool (X ==K "with")
syntax Bool ::= "#@IsFutureReservedWord" "(" Var ")" [function]
rule #@IsFutureReservedWord(X:Var)
=> (X ==K "class")
orBool (X ==K "const")
orBool (X ==K "enum")
orBool (X ==K "export")
orBool (X ==K "extends")
orBool (X ==K "import")
orBool (X ==K "super")
syntax Bool ::= "#@IsFutureReservedWordInStrictMode" "(" Var ")" [function]
rule #@IsFutureReservedWordInStrictMode(X:Var)
=> (X ==K "implements")
orBool (X ==K "interface")
orBool (X ==K "let")
orBool (X ==K "package")
orBool (X ==K "private")
orBool (X ==K "protected")
orBool (X ==K "public")
orBool (X ==K "static")
orBool (X ==K "yield")
//////////////////////////////////////////////////////////////////////////////
// 7.8 Literals
//////////////////////////////////////////////////////////////////////////////
// 7.8.1 Null Literals
rule %null => @NullVal
// 7.8.2 Boolean Literals
// Bool
// 7.8.3 Numeric Literals
// Int
// Float
// 7.8.4 String Literals
// String
// 7.8.5 Regular Expression Literals
// TODO:
//////////////////////////////////////////////////////////////////////////////
// 8.7 The Reference Specification Type
//////////////////////////////////////////////////////////////////////////////
syntax Reference ::= "@Ref" "(" K /* Base */ "," K /* Var */ "," K /* Bool */ ")" [seqstrict]
syntax ReferenceVal ::= "@Ref" "(" Base "," Var "," Bool ")"
syntax Reference ::= ReferenceVal
syntax Val ::= ReferenceVal
//rule isVal(@Ref(B:Base,N:Var,S:Bool)) => true
//rule isVal(@Ref(B,N,S)) => isBase(B) ==K true andBool isVar(N) ==K true andBool isBool(S) ==K true
syntax Base ::= UndefinedType
| Primitive
| Oid
| Eid
/* FIXME:
syntax Base
rule isBase(Undefined) => true
rule isBase(_:Primitive) => true
rule isBase(_:Oid) => true
rule isBase(_:Eid) => true
*/
syntax KItem /* Base */ ::= "GetBase" "(" K /* Reference */ ")" [seqstrict]
rule GetBase(@Ref(Base:Base,_,_)) => Base
syntax KItem /* Var */ ::= "GetReferencedName" "(" K /* Reference */ ")" [seqstrict]
rule GetReferencedName(@Ref(_,Name:Var,_)) => Name
syntax KItem /* Bool */ ::= "IsStrictReference" "(" K /* Reference */ ")" [seqstrict]
rule IsStrictReference(@Ref(_,_,Strict:Bool)) => Strict
syntax KItem /* Bool */ ::= "HasPrimitiveBase" "(" K /* Reference */ ")" [seqstrict]
rule HasPrimitiveBase(@Ref(Undefined, _,_)) => false
rule HasPrimitiveBase(@Ref(_:Primitive,_,_)) => true
rule HasPrimitiveBase(@Ref(_:Oid, _,_)) => false
rule HasPrimitiveBase(@Ref(_:Eid, _,_)) => false
syntax KItem /* Bool */ ::= "IsPropertyReference" "(" K /* Reference */ ")" [seqstrict]
rule IsPropertyReference(@Ref(Undefined, _,_)) => false
rule IsPropertyReference(@Ref(_:Primitive,_,_)) => true
rule IsPropertyReference(@Ref(_:Oid, _,_)) => true
rule IsPropertyReference(@Ref(_:Eid, _,_)) => false
syntax KItem /* Bool */ ::= "IsUnresolvableReference" "(" K /* Reference */ ")" [seqstrict]
rule IsUnresolvableReference(@Ref(Base:Base,_,_)) => Base ==K Undefined
// 8.7.1 GetValue (V)
// TODO: Do we need to consider step 1?
syntax KItem /* Val */ ::= "GetValue" "(" K /* Reference */ ")" [seqstrict]
rule GetValue(@Ref(E:Eid, N:Var, Strict:Bool)) => GetBindingValue(E,N,Strict)
rule GetValue(@Ref(O:Oid, P:Var, _ )) => Get(O,P)
rule GetValue(@Ref(Undefined, P:Var, _ )) => @Throw(@ReferenceError("GetValue",P))
/* NOTE: This does not work!!! [[Get]] with 'ToObject' differs from [[Get]] for Primitive base.
rule GetValue(@Ref(B:Bool, P:Var, Strict:Bool)) => GetValue(@Ref(ToObject(B),P,Strict))
rule GetValue(@Ref(S:String, P:Var, Strict:Bool)) => GetValue(@Ref(ToObject(S),P,Strict))
rule GetValue(@Ref(N:Number, P:Var, Strict:Bool)) => GetValue(@Ref(ToObject(N),P,Strict))
*/
rule GetValue(@Ref(B:Primitive,P:Var, _ )) => GetPrimitive(B,P)
syntax KItem /* Val */ ::= "GetPrimitive" "(" K /* Primitive */ "," K /* Var */ ")" [seqstrict]
rule GetPrimitive(Base:Primitive,P:Var)
=> BEGIN
Let $o = ToObject(Base);
Let $desc = GetProperty($o,P);
If $desc = Undefined then {
Return Undefined;
} else {
If IsDataDescriptor($desc) = true then {
Return $desc."Value";
} else {
Let $getter = $desc."Get";
If $getter = Undefined then {
Return Undefined;
} else {
Return Call($getter,Base,@Nil); // NOTE: Only difference from Get@Default: 'Base' is used, instead of '$o'.
}
}
}
END
// 8.7.2 PutValue (V, W)
// NOTE: Step 1 is covered by @GetReference that raise ReferenceError for non-reference expressions
syntax KItem /* .K */ ::= "PutValue" "(" K /* Reference */ "," K /* Val */ ")" [seqstrict]
rule PutValue(@Ref(E:Eid, N:Var, Strict:Bool), V:Val) => SetMutableBinding(E,N,V,Strict) when (N =/=K "eval" andBool N =/=K "arguments") orBool Strict =/=K true
rule PutValue(@Ref(O:Oid, P:Var, Strict:Bool), V:Val) => Put(O, P,V,Strict)
rule PutValue(@Ref(Undefined, P:Var, false ), V:Val) => Put(@GlobalOid,P,V,false)
rule PutValue(@Ref(Undefined, P:Var, true ), _ ) => @Throw(@ReferenceError("PutValue",P))
// NOTE: Handled by this: 11.13.1 step 4, 11.13.2 step 6, 11.3.1, 11.3.2, 11.4.4, 11.4.5
rule PutValue(@Ref(_:Eid, N:Var, true ), _ ) => @Throw(@SyntaxError("PutValue",N)) when N ==K "eval" orBool N ==K "arguments"
/*
/* NOTE: This does not work!!! [[Put]] with 'ToObject' differs from [[Put]] for Primitive base.
rule PutValue(@Ref(B:Bool, P:Var, Strict:Bool), V:Val) => PutValue(@Ref(ToObject(B),P,Strict),V)
rule PutValue(@Ref(S:String, P:Var, Strict:Bool), V:Val) => PutValue(@Ref(ToObject(S),P,Strict),V)
rule PutValue(@Ref(N:Number, P:Var, Strict:Bool), V:Val) => PutValue(@Ref(ToObject(N),P,Strict),V)
*/
rule PutValue(@Ref(B:Primitive,P:Var, Strict:Bool), V:Val) => PutPrimitive(B,P,V,Strict)
syntax KItem /* Val */ ::= "PutPrimitive" "(" K /* Primitive */ "," K /* Var */ "," K /* Val */ "," K /* Bool */ ")" [seqstrict]
rule PutPrimitive(Base:Primitive,P:Var,V:Val,Throw:Bool)
=> BEGIN
Let $o = ToObject(Base);
If CanPut($o,P) = false then {
If Throw = true then {
Do @Throw(@TypeError("PutPrimitive, cannot put",PutPrimitive(Base,P,V,Throw)));
} else {
Return;
}
} else {
Let $ownDesc = GetOwnProperty($o,P);
If IsDataDescriptor($ownDesc) = true then {
// NOTE: different from [[Put]]: do not put value
If Throw = true then {
Do @Throw(@TypeError("PutPrimitive, own Desc is a data descriptor",PutPrimitive(Base,P,V,Throw)));
} else {
Return;
}
} else {
Let $desc = GetProperty($o,P);
If IsAccessorDescriptor($desc) = true then {
Let $setter = $desc."Set";
DoI Call($setter,Base,@Cons(V,@Nil)); // NOTE: different from [[Put]]: use 'Base' instead of '$o'
} else {
// NOTE: different from [[Put]]: do not put value
If Throw = true then {
Do @Throw(@TypeError("PutPrimitive, inherited Desc is a data descriptor",PutPrimitive(Base,P,V,Throw)));
} else {
Return;
}
}
}
}
END
//////////////////////////////////////////////////////////////////////////////
// 8.10 The Property Descriptor and Property Identifier Specification Types
//////////////////////////////////////////////////////////////////////////////
// 8.10.1 IsAccessorDescriptor ( Desc )
syntax KItem /* Bool */ ::= "IsAccessorDescriptor" "(" K /* Val */ ")" [seqstrict]
rule IsAccessorDescriptor(Undefined) => false
rule IsAccessorDescriptor(@desc(Desc)) => ("Get" in keys(Desc)) orBool
("Set" in keys(Desc))
// 8.10.2 IsDataDescriptor ( Desc )
syntax KItem /* Bool */ ::= "IsDataDescriptor" "(" K /* Val */ ")" [seqstrict]
rule IsDataDescriptor(Undefined) => false
rule IsDataDescriptor(@desc(Desc)) => ("Value" in keys(Desc)) orBool
("Writable" in keys(Desc))
// 8.10.3 IsGenericDescriptor ( Desc )
syntax KItem /* Bool */ ::= "IsGenericDescriptor" "(" K /* Val */ ")" [seqstrict]
rule IsGenericDescriptor(Undefined) => false
rule IsGenericDescriptor(@desc(Desc)) => notBool("Get" in keys(Desc)) andBool
notBool("Set" in keys(Desc)) andBool
notBool("Value" in keys(Desc)) andBool
notBool("Writable" in keys(Desc))
// 8.10.? IsValidDescriptor ( Desc )
syntax KItem /* Bool */ ::= "IsValidDescriptor" "(" K /* PropertyDescriptor */ ")" [seqstrict]
rule IsValidDescriptor(Desc:PropertyDescriptor) => @NotBool(@AndBool(IsAccessorDescriptor(Desc),IsDataDescriptor(Desc)))
// 8.10.? #IsFullyPopulatedDescriptor ( Desc )
syntax Bool ::= "#IsFullyPopulatedDescriptor" "(" PropertyDescriptor ")" [function]
rule #IsFullyPopulatedDescriptor(@desc(Desc)) => (keys(Desc) ==K SetItem("Get") SetItem("Set") SetItem("Enumerable") SetItem("Configurable"))
orBool (keys(Desc) ==K SetItem("Value") SetItem("Writable") SetItem("Enumerable") SetItem("Configurable"))
// 8.10.? MakeFullyPopulatedDescriptor ( Desc )
syntax KItem /* PropertyDescriptor */ ::= "MakeFullyPopulatedDataDescriptor1" "(" K /* PropertyDescriptor */ ")" [seqstrict]
rule MakeFullyPopulatedDataDescriptor1(Desc:PropertyDescriptor) => MakeFullyPopulatedDataDescriptor2(Desc,@desc("Value" |-> Undefined "Writable" |-> false "Enumerable" |-> false "Configurable" |-> false))
syntax KItem /* PropertyDescriptor */ ::= "MakeFullyPopulatedAccessorDescriptor1" "(" K /* PropertyDescriptor */ ")" [seqstrict]
rule MakeFullyPopulatedAccessorDescriptor1(Desc:PropertyDescriptor) => MakeFullyPopulatedAccessorDescriptor2(Desc,@desc("Get" |-> Undefined "Set" |-> Undefined "Enumerable" |-> false "Configurable" |-> false))
syntax KItem /* PropertyDescriptor */ ::= "MakeFullyPopulatedDataDescriptor2" "(" K /* PropertyDescriptor */ "," K /* PropertyDescriptor */ ")" [seqstrict]
rule MakeFullyPopulatedDataDescriptor2(@desc(Desc),Default:PropertyDescriptor) => MakeFullyPopulatedDataDescriptor2(@desc(#@AddMap("Value", Default.."Value", Desc)),Default) when notBool("Value" in keys(Desc))
rule MakeFullyPopulatedDataDescriptor2(@desc(Desc),Default:PropertyDescriptor) => MakeFullyPopulatedDataDescriptor2(@desc(#@AddMap("Writable", Default.."Writable", Desc)),Default) when notBool("Writable" in keys(Desc))
rule MakeFullyPopulatedDataDescriptor2(@desc(Desc),Default:PropertyDescriptor) => MakeFullyPopulatedDataDescriptor2(@desc(#@AddMap("Enumerable", Default.."Enumerable", Desc)),Default) when notBool("Enumerable" in keys(Desc))
rule MakeFullyPopulatedDataDescriptor2(@desc(Desc),Default:PropertyDescriptor) => MakeFullyPopulatedDataDescriptor2(@desc(#@AddMap("Configurable",Default.."Configurable",Desc)),Default) when notBool("Configurable" in keys(Desc))
rule MakeFullyPopulatedDataDescriptor2(@desc(Desc),Default:PropertyDescriptor) => @desc(Desc) when #IsFullyPopulatedDescriptor(@desc(Desc))
syntax KItem /* PropertyDescriptor */ ::= "MakeFullyPopulatedAccessorDescriptor2" "(" K /* PropertyDescriptor */ "," K /* PropertyDescriptor */ ")" [seqstrict]
rule MakeFullyPopulatedAccessorDescriptor2(@desc(Desc),Default:PropertyDescriptor) => MakeFullyPopulatedAccessorDescriptor2(@desc(#@AddMap("Get", Default.."Get", Desc)),Default) when notBool("Get" in keys(Desc))
rule MakeFullyPopulatedAccessorDescriptor2(@desc(Desc),Default:PropertyDescriptor) => MakeFullyPopulatedAccessorDescriptor2(@desc(#@AddMap("Set", Default.."Set", Desc)),Default) when notBool("Set" in keys(Desc))
rule MakeFullyPopulatedAccessorDescriptor2(@desc(Desc),Default:PropertyDescriptor) => MakeFullyPopulatedAccessorDescriptor2(@desc(#@AddMap("Enumerable", Default.."Enumerable", Desc)),Default) when notBool("Enumerable" in keys(Desc))
rule MakeFullyPopulatedAccessorDescriptor2(@desc(Desc),Default:PropertyDescriptor) => MakeFullyPopulatedAccessorDescriptor2(@desc(#@AddMap("Configurable",Default.."Configurable",Desc)),Default) when notBool("Configurable" in keys(Desc))
rule MakeFullyPopulatedAccessorDescriptor2(@desc(Desc),Default:PropertyDescriptor) => @desc(Desc) when #IsFullyPopulatedDescriptor(@desc(Desc))
// 8.10.4 FromPropertyDescriptor ( Desc )
syntax KItem /* Val */ ::= "FromPropertyDescriptor" "(" K /* PropertyDescriptor */ ")" [seqstrict]
rule FromPropertyDescriptor(Undefined) => Undefined
syntax Id ::= "$obj"
rule FromPropertyDescriptor(Desc:PropertyDescriptor)
=> BEGIN
Let $obj = @CreateObject;
If IsDataDescriptor(Desc) = true then {
DoI DefineOwnProperty($obj, "value", @desc("Value" |-> Desc.."Value" "Writable" |-> true "Enumerable" |-> true "Configurable" |-> true), false);
DoI DefineOwnProperty($obj, "writable", @desc("Value" |-> Desc.."Writable" "Writable" |-> true "Enumerable" |-> true "Configurable" |-> true), false);
} else /* IsAccessorDescriptor(Desc) = true */ {
DoI DefineOwnProperty($obj, "get", @desc("Value" |-> Desc.."Get" "Writable" |-> true "Enumerable" |-> true "Configurable" |-> true), false);
DoI DefineOwnProperty($obj, "set", @desc("Value" |-> Desc.."Set" "Writable" |-> true "Enumerable" |-> true "Configurable" |-> true), false);
}
DoI DefineOwnProperty($obj, "enumerable", @desc("Value" |-> Desc.."Enumerable" "Writable" |-> true "Enumerable" |-> true "Configurable" |-> true), false);
DoI DefineOwnProperty($obj, "configurable", @desc("Value" |-> Desc.."Configurable" "Writable" |-> true "Enumerable" |-> true "Configurable" |-> true), false);
Return $obj;
END
when #IsFullyPopulatedDescriptor(Desc)
// 8.10.5 ToPropertyDescriptor ( Obj )
// TODO: make it more elegant
syntax KItem /* PropertyDescriptor */ ::= "ToPropertyDescriptor" "(" K /* Val */ ")" [seqstrict]
rule ToPropertyDescriptor(V:Val) => @Throw(@TypeError("ToPropertyDescriptor",V)) when notBool(#@IsOid(V))
syntax Id ::= "$desc0" | "$desc1" | "$desc2" | "$desc3" | "$desc4" | "$desc5" | "$desc6"
rule ToPropertyDescriptor(O:Oid)
=> BEGIN
Let $desc0 = @desc(.Map);
Let $desc1 = ToPropertyDescriptorAux(O,"enumerable", $desc0,"Enumerable");
Let $desc2 = ToPropertyDescriptorAux(O,"configurable",$desc1,"Configurable");
Let $desc3 = ToPropertyDescriptorAux(O,"value", $desc2,"Value");
Let $desc4 = ToPropertyDescriptorAux(O,"writable", $desc3,"Writable");
Let $desc5 = ToPropertyDescriptorAux(O,"get", $desc4,"Get");
Let $desc6 = ToPropertyDescriptorAux(O,"set", $desc5,"Set");
If IsValidDescriptor($desc6) = true then {
Return $desc6;
} else {
Do @Throw(@TypeError("ToPropertyDescriptor InvalidDescriptor",$desc6));
}
END
syntax KItem /* PropertyDescriptor */ ::= "ToPropertyDescriptorAux" "(" K /* Oid */ "," K /* Var */ "," K /* PropertyDescriptor */ "," K /* String */ ")" [seqstrict]
syntax Id ::= "$value"
rule ToPropertyDescriptorAux(O:Oid,P:Var,Desc:PropertyDescriptor,Attr:String)
=> BEGIN
If HasProperty(O,P) = true then {
Let $value = ToBoolean(Get(O,P));
Return @AddDesc(Attr, $value, Desc);
} else {
Return Desc;
}
END
when (P ==K "enumerable" andBool Attr ==K "Enumerable")
orBool (P ==K "configurable" andBool Attr ==K "Configurable")
orBool (P ==K "writable" andBool Attr ==K "Writable")
rule ToPropertyDescriptorAux(O:Oid,P:Var,Desc:PropertyDescriptor,Attr:String)
=> BEGIN
If HasProperty(O,P) = true then {
Let $value = Get(O,P);
Return @AddDesc(Attr, $value, Desc);
} else {
Return Desc;
}
END
when P ==K "value" andBool Attr ==K "Value"
rule ToPropertyDescriptorAux(O:Oid,P:Var,Desc:PropertyDescriptor,Attr:String)
=> BEGIN
If HasProperty(O,P) = true then {
Let $value = Get(O,P);
If IsCallable($value) = true then {
Nop;
} else {
If $value = Undefined then {
Nop;
} else {
Do @Throw(@TypeError("ToPropertyDescriptorAux",$value));
}
}
Return @AddDesc(Attr, $value, Desc);
} else {
Return Desc;
}
END
when (P ==K "get" andBool Attr ==K "Get")
orBool (P ==K "set" andBool Attr ==K "Set")
//////////////////////////////////////////////////////////////////////////////
// 8.12 Algorithms for Object Internal Methods
//////////////////////////////////////////////////////////////////////////////
// 8.12.1 [[GetOwnProperty]] (P)
syntax KItem /* Val */ ::= "GetOwnProperty" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
rule GetOwnProperty(O:Oid,P:Var)
=> BEGIN
If @IsArgumentsObjectNonStrictWithFormalParams(O) = true then {
Do GetOwnProperty@Arguments(O,P);
} else {
If @IsStringObject(O) = true then {
Do GetOwnProperty@String(O,P);
} else {
Do GetOwnProperty@Default(O,P);
}
}
END
syntax KItem /* Val */ ::= "GetOwnProperty@Default" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
rule <k> GetOwnProperty@Default(O:Oid,P:Var) => V ... </k>
<obj>
<oid> O </oid>
<properties> P |-> V:Val _:Map </properties>
_
</obj>
[getOwnProperty]
rule <k> GetOwnProperty@Default(O:Oid,P:Var) => Undefined ... </k>
<obj>
<oid> O </oid>
<properties> Prop:Map </properties>
_
</obj>
when notBool(P in keys(Prop))
[getOwnProperty]
// 8.12.? [[GetInternalProperty]] (P)
syntax KItem /* Val */ ::= "GetInternalProperty" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
rule <k> GetInternalProperty(O:Oid,P:Var) => V ... </k>
<obj>
<oid> O </oid>
<internalProperties> P |-> V:Val _:Map </internalProperties>
_
</obj>
rule <k> GetInternalProperty(O:Oid,P:Var) => Undefined ... </k>
<obj>
<oid> O </oid>
<internalProperties> Prop:Map </internalProperties>
_
</obj>
when notBool(P in keys(Prop))
// 8.12.? [[SetInternalProperty]] (P,V)
syntax KItem /* .K */ ::= "SetInternalProperty" "(" K /* Oid */ "," K /* Var */ "," K /* Val */ ")" [seqstrict]
rule <k> SetInternalProperty(O:Oid,P:Var,V:Val) => . ... </k>
<obj>
<oid> O </oid>
<internalProperties> Prop:Map => #@AddMap(P,V,Prop) </internalProperties>
_
</obj>
// 8.12.? [[GetInheritedProperty]] (P)
syntax KItem /* Val */ ::= "GetInheritedProperty" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
rule <k> GetInheritedProperty(O:Oid,P:Var) => GetProperty(O',P) ... </k>
<obj>
<oid> O </oid>
<internalProperties> "Prototype" |-> O':Oid _:Map </internalProperties>
_
</obj>
when O' =/=K @NullOid
rule <k> GetInheritedProperty(O:Oid,_) => Undefined ... </k>
<obj>
<oid> O </oid>
<internalProperties> "Prototype" |-> @NullOid _:Map </internalProperties>
_
</obj>
// 8.12.? [[GetInheritedPropertyOwner]] (P)
syntax KItem /* Val */ ::= "GetInheritedPropertyOwner" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
rule <k> GetInheritedPropertyOwner(O:Oid,P:Var) => GetPropertyOwner(O',P) ... </k>
<obj>
<oid> O </oid>
<internalProperties> "Prototype" |-> O':Oid _:Map </internalProperties>
_
</obj>
when O' =/=K @NullOid
rule <k> GetInheritedPropertyOwner(O:Oid,_) => @NullOid ... </k>
<obj>
<oid> O </oid>
<internalProperties> "Prototype" |-> @NullOid _:Map </internalProperties>
_
</obj>
// 8.12.2 [[GetProperty]] (P)
syntax KItem /* Val */ ::= "GetProperty" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
syntax Id ::= "$prop"
rule GetProperty(O:Oid,P:Var)
=> BEGIN
Let $prop = GetOwnProperty(O,P);
If $prop = Undefined then {
Return GetInheritedProperty(O,P);
} else {
Return $prop;
}
END
// 8.12.? [[GetPropertyOwner]] (P)
syntax KItem /* Val */ ::= "GetPropertyOwner" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
rule GetPropertyOwner(O:Oid,P:Var)
=> BEGIN
Let $prop = GetOwnProperty(O,P);
If $prop = Undefined then {
Return GetInheritedPropertyOwner(O,P);
} else {
Return O;
}
END
// 8.12.3 [[Get]] (P)
syntax KItem /* Val */ ::= "Get" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
rule Get(O:Oid,P:Var)
=> BEGIN
If @IsArgumentsObjectNonStrictWithFormalParams(O) = true then {
Do Get@Arguments(O,P);
} else {
Do Get@Default(O,P);
}
END
syntax KItem /* Val */ ::= "Get@Default" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
syntax Id ::= "$desc" | "$getter"
rule Get@Default(O:Oid,P:Var)
=> BEGIN
Let $desc = GetProperty(O,P);
If $desc = Undefined then {
Return Undefined;
} else {
If IsDataDescriptor($desc) = true then {
Return $desc."Value";
} else {
Let $getter = $desc."Get";
If $getter = Undefined then {
Return Undefined;
} else {
Return Call($getter,O,@Nil);
}
}
}
END
// 8.12.4 [[CanPut]] (P)
// Intuistic Algorithm
//
// If O has P as its own property,
// the property should be writable
// or, its setter function should be defined.
//
// If O has P as its inherited property,
// O should be extensible and the inherited property should be writable (the inherited property is not supposed to be updated, though)
// or, its setter function should be defined.
//
// If O has no P along with prototype chain,
// O should be extensible.
syntax KItem /* Bool */ ::= "CanPut" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
syntax Id ::= "$proto" | "$inherited"
rule CanPut(O:Oid,P:Var)
=> BEGIN
Let $desc = GetOwnProperty(O,P);
If $desc = Undefined then {
Let $proto = GetInternalProperty(O,"Prototype");
If $proto = @NullOid then {
Return GetInternalProperty(O,"Extensible");
} else {
Let $inherited = GetProperty($proto,P);
If $inherited = Undefined then {
Return GetInternalProperty(O,"Extensible");
} else {
If IsAccessorDescriptor($inherited) = true then {
If $inherited."Set" = Undefined then {
Return false;
} else {
Return true;
}
} else {
If GetInternalProperty(O,"Extensible") = false then {
Return false;
} else {
Return $inherited."Writable";
}
}
}
}
} else {
If IsAccessorDescriptor($desc) = true then {
If $desc."Set" = Undefined then {
Return false;
} else {
Return true;
}
} else {
Return $desc."Writable";
}
}
END
// 8.12.5 [[Put]] ( P, V, Throw )
syntax KItem /* .K */ ::= "Put" "(" K /* Oid */ "," K /* Var */ "," K /* Val */ "," K /* Bool */ ")" [seqstrict]
syntax Id ::= "$ownDesc" | "$valueDesc" | "$setter" | "$newDesc"
rule Put(O:Oid,P:Var,V:Val,Throw:Bool)
=> BEGIN
If CanPut(O,P) = false then {
If Throw = true then {
Do @Throw(@TypeError("Put",Put(O,P,V,Throw)));
} else {
Return;
}
} else {
Let $ownDesc = GetOwnProperty(O,P);
If IsDataDescriptor($ownDesc) = true then {
Let $valueDesc = @desc("Value" |-> V);
DoI DefineOwnProperty(O,P,$valueDesc,Throw);
} else {
Let $desc = GetProperty(O,P);
If IsAccessorDescriptor($desc) = true then {
Let $setter = $desc."Set";
DoI Call($setter,O,@Cons(V,@Nil));
} else {
Let $newDesc = @desc("Value" |-> V "Writable" |-> true "Enumerable" |-> true "Configurable" |-> true);
DoI DefineOwnProperty(O,P,$newDesc,Throw);
}
}
}
END
// 8.12.? [[HasOwnProperty]] (P)
syntax KItem /* Bool */ ::= "HasOwnProperty" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
rule HasOwnProperty(O:Oid,P:Var)
=> BEGIN
If GetOwnProperty(O,P) = Undefined then {
Return false;
} else {
Return true;
}
END
// 8.12.6 [[HasProperty]] (P)
syntax KItem /* Bool */ ::= "HasProperty" "(" K /* Oid */ "," K /* Var */ ")" [seqstrict]
rule HasProperty(O:Oid,P:Var)
=> BEGIN
If GetProperty(O,P) = Undefined then {
Return false;
} else {
Return true;
}
END
// 8.12.7 [[Delete]] (P, Throw)
syntax KItem /* Bool */ ::= "Delete" "(" K /* Oid */ "," K /* Var */ "," K /* Bool */ ")" [seqstrict]
rule Delete(O:Oid,P:Var,Throw:Bool)
=> BEGIN
If @IsArgumentsObjectNonStrictWithFormalParams(O) = true then {
Do Delete@Arguments(O,P,Throw);
} else {
Do Delete@Default(O,P,Throw);
}
END
syntax KItem /* Bool */ ::= "Delete@Default" "(" K /* Oid */ "," K /* Var */ "," K /* Bool */ ")" [seqstrict]
rule <k> Delete@Default(O:Oid,P:Var,Throw:Bool) => true ... </k>
<obj>
<oid> O </oid>
<properties> Prop:Map </properties>
_
</obj>
when notBool(P in keys(Prop))
rule <k> Delete@Default(O:Oid,P:Var,Throw:Bool) => true ... </k>
<obj>
<oid> O </oid>
<properties>
(P |-> @desc("Configurable" |-> true _) => .Map)
_:Map
</properties>
_
</obj>
rule <k> Delete@Default(O:Oid,P:Var,Throw:Bool) => Reject(Throw,"Delete@Default",Delete@Default(O,P,Throw)) ... </k>
<obj>
<oid> O </oid>
<properties>
P |-> @desc("Configurable" |-> false _)
_:Map
</properties>
_
</obj>
// 8.12.8 [[DefaultValue]] (hint)
syntax KItem /* Val */ ::= "DefaultValue" "(" K /* Oid */ "," K /* String */ ")" [seqstrict]
// TODO: Can we make it more elegant?
syntax Id ::= "$toString" | "$valueOf" | "$str" | "$val"
rule DefaultValue(O:Oid,"String")
=> BEGIN
Let $toString = Get(O,"toString");
If IsCallable($toString) = true then {
Let $str = Call($toString,O,@Nil);
If @IsPrimitive($str) = true then {
Return $str; Exit;
};
};
Let $valueOf = Get(O,"valueOf");
If IsCallable($valueOf) = true then {
Let $val = Call($valueOf,O,@Nil);
If @IsPrimitive($val) = true then {
Return $val; Exit;
};
};
Do @Throw(@TypeError("DefaultValue String",O));
END
rule DefaultValue(O:Oid,"Number")
=> BEGIN
Let $valueOf = Get(O,"valueOf");
If IsCallable($valueOf) = true then {
Let $val = Call($valueOf,O,@Nil);
If @IsPrimitive($val) = true then {
Return $val; Exit;
};
};
Let $toString = Get(O,"toString");
If IsCallable($toString) = true then {
Let $str = Call($toString,O,@Nil);
If @IsPrimitive($str) = true then {
Return $str; Exit;
};
};
Do @Throw(@TypeError("DefaultValue Number",O));
END
rule <k> DefaultValue(O:Oid,"") => DefaultValue(O,"String") ... </k>
<obj>
<oid> O </oid>
<internalProperties> "Class" |-> "Date" _:Map </internalProperties>
_
</obj>
rule <k> DefaultValue(O:Oid,"") => DefaultValue(O,"Number") ... </k>
<obj>
<oid> O </oid>
<internalProperties> "Class" |-> Class:String _:Map </internalProperties>
_
</obj>
when Class =/=String "Date"
// 8.12.9 [[DefineOwnProperty]] (P, Desc, Throw)
// Intuitive algorithm
//
// If O has P as its own property,
// If the property is configurable,
// any change is acceptable.
// Else,
// only value field can be updated when the property is writable.
// o.w., rejected.
//
// If O does not have P as its own property,
// If O is extensible,
// freely update it.
// Else,
// reject.
syntax KItem /* Bool */ ::= "DefineOwnProperty" "(" K /* Oid */ "," K /* Var */ "," K /* PropertyDescriptor */ "," K /* Bool */ ")" [seqstrict]
rule DefineOwnProperty(O:Oid,P:Var,Desc:PropertyDescriptor,Throw:Bool)
=> BEGIN
If @IsArgumentsObjectNonStrictWithFormalParams(O) = true then {
Do DefineOwnProperty@Arguments(O,P,Desc,Throw);
} else {
If @IsArrayObject(O) = true then {
Do DefineOwnProperty@Array(O,P,Desc,Throw);
} else {
Do DefineOwnProperty@Default(O,P,Desc,Throw);
}