@[test(code_01)]
invar class Immutable
{
    var index = 123 
    var items : list<int>

    routine Immutable(){
    }
}
@[test(code_01)]
@[test(code_01)]
{{At line}} .* {{Invalid storage type/combination}}
@[test(code_01)]





@[test(code_01)]
invar class Immutable
{
    invar index = 123 
    invar items : list<int>

    routine Immutable( wrong_param: list<int> ){
    }   
}
@[test(code_01)]
@[test(code_01)]
{{At line}} .* {{Expecting primitive or immutable parameter types}}
@[test(code_01)]





@[test(code_01)]
var global = 123

invar class Immutable
{
    invar items : list<int>

    routine Immutable(){
        items = { global }
    }   
}
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]





@[test(code_01)]
var global = { 1, 2, 3 }

invar class Immutable
{
    invar items : list<int>

    routine Immutable(){
        items = global
    }   
}
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]
# {{Invalid constructor definition for invar class}}.*
# {{Invalid operation that might return external nonprimitive and mutable types}}





@[test(code_01)]
var global = { 1, 2, 3 }

invar class Immutable
{
    invar items : list<int>

    routine Immutable(){
        items = Method()
    }   

    routine Method(){
        return global
    }   
}
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]
# {{Invalid constructor definition for invar class}}.*
# {{Invalid operation that might return external nonprimitive and mutable types}}




@[test(code_01)]
invar class Immutable
{
    invar items : Immutable|none = none

    routine Immutable( dep = 10 ){
        if( dep ) items = Immutable( dep-1 )
    }   
}
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]




@[test(code_01)]
invar class Immutable
{
    invar index = 123 

    routine Immutable( i: int ){
		index = i
    }
}
im = Immutable( 12 )
im.index = 456
@[test(code_01)]
@[test(code_01)]
{{At line}} .* {{Constant or invariable cannot be modified}}
@[test(code_01)]




@[test(code_01)]
invar class K
{
    invar index = {}
}

a = { 1, 2, 3 } 

# index is of type: invar<list<any>>
# list<int> can be allowed to match to it:
k = K.{ a } 
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]




@[test(code_01)]
invar class Immutable
{
    invar index = 123 
    invar items : list<int>

    routine Immutable(){
        items = items
    }   
}
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]





@[test(code_01)]
invar class K
{
    invar index: list<any> = { { } } 

    routine M(){
        return index[0]
    }   
}
invar k = K() 
s = k.M()
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]




@[test(code_01)]
invar class K
{
    invar index: list<any> = { { } } 

    routine M(){
        return index[0]
    }   
}
k = K() 
s = k.M()
s.append( 123 );
@[test(code_01)]
@[test(code_01)]
{{[[Error::Param]]}}
@[test(code_01)]




@[test(code_01)]
class Base
{
	invar value = 123
}
invar class Derived : Base
{
}
@[test(code_01)]
@[test(code_01)]
{{At line}} .* {{Invalid parent class}}
@[test(code_01)]




@[test(code_01)]
class Base
{
	invar value = 123
}
invar class Derived ( Base )
{
}
@[test(code_01)]
@[test(code_01)]
{{At line}} .* {{Invalid parent class}}
@[test(code_01)]




@[test(code_01)]
invar class Base
{
	invar value = 123
	routine Base(){ value = 456 }
}
invar class Derived : Base
{
	invar name = 'abc'
	routine Derived() : Base() { name = 'def' }
}
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]




@[test(code_01)]
invar class Base
{
	invar value = 123
	routine Base(){ value = 456 }
}
invar class Derived ( Base )
{
	invar name = 'abc'
	routine Derived() : Base() { name = 'def' }
}
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]




@[test(code_01)]
invar class Base
{
	invar value = 123
}
invar class Derived ( Base )
{
	invar name = 'abc'
	routine Derived() : Base() { name = 'def' }
}
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]




@[test(code_01)]
invar class K { }
invar k = K()
var m = k  # Allowed, because k is immutable regardless "var" or "invar" declaration;
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]





@[test(code_01)]
invar class K { }
routine T()
{
	invar k = K()
	var m = k  # Allowed, because k is immutable regardless "var" or "invar" declaration;
}
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]





@[test(code_01)]
invar class K { }
invar k = K()
var m: tuple<int,K> = ( 123, k )
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]




@[test(code_01)]
invar class K { }
invar k = K()
var m: tuple<int,K> = ( 123, K() )
m[1] = k
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]




@[test(code_01)]
invar class K { }
invar k = K()
var m: tuple<id:int,obj:K> = ( 123, K() )
m.obj = k
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]






@[test(code_01)]
invar class K { }
routine T( k: K ) { }
invar k = K()
T( k )  # Allowed, because k is immutable regardless "var" or "invar" declaration;
@[test(code_01)]
@[test(code_01)]
@[test(code_01)]