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disallowd a non-pointer object to inherit a pointer object with instance variables

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This commit is contained in:
hyunghwan.chung 2018-01-06 17:42:42 +00:00
parent de1f8c9551
commit e9b33016a4
2 changed files with 47 additions and 14 deletions
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15
moo/kernel/Socket.moo
View File

@ -223,6 +223,17 @@ class SocketAddress(Object) from 'sck.addr'
}
}
class X(Object)
{
var tt,yy.
method x {
self.yy := 9.
}
}
class(#byte(3)) Y(X)
{
}
##class InetSocketAddress(SocketAddress)
##{
@ -367,6 +378,10 @@ class MyObject(Object)
{
| s conact inact outact |
s := Y new.
s x.
s basicSize dump.
'****************************' dump.
s := ByteArray new: 100.
s basicFillFrom: 0 with: ($a asInteger) count: 100.

32
moo/lib/comp.c
View File

@ -3246,7 +3246,8 @@ if super is variable-nonpointer, no instance variable is allowed.
*/
if (dcl_type == VAR_INSTANCE && (moo->c->cls.flags & CLASS_INDEXED) && (moo->c->cls.indexed_type != MOO_OBJ_TYPE_OOP))
{
set_syntax_error (moo, MOO_SYNERR_VARNAMEDUPL, TOKEN_LOC(moo), TOKEN_NAME(moo));
/* a non-pointer object cannot have instance variables */
set_syntax_error (moo, MOO_SYNERR_VARDCLBANNED, TOKEN_LOC(moo), TOKEN_NAME(moo));
return -1;
}
@ -3388,7 +3389,8 @@ if super is variable-nonpointer, no instance variable is allowed.
*/
if (dcl_type == VAR_INSTANCE && (moo->c->cls.flags & CLASS_INDEXED) && (moo->c->cls.indexed_type != MOO_OBJ_TYPE_OOP))
{
set_syntax_error (moo, MOO_SYNERR_VARNAMEDUPL, TOKEN_LOC(moo), TOKEN_NAME(moo));
/* a non-pointer object cannot have instance variables */
set_syntax_error (moo, MOO_SYNERR_VARDCLBANNED, TOKEN_LOC(moo), TOKEN_NAME(moo));
return -1;
}
@ -6932,8 +6934,8 @@ static int make_defined_class (moo_t* moo)
if (moo->c->cls.type_size > 0)
{
/* class(#byte(N)), class(#word(N)), etc */
/* TODO: ensure that this size is equal to greater than the type size of the parent */
MOO_ASSERT (moo, moo->c->cls.var[VAR_INSTANCE].total_count == 0);
MOO_ASSERT (moo, moo->c->cls.flags & CLASS_INDEXED);
MOO_ASSERT (moo, moo->c->cls.indexed_type != MOO_OBJ_TYPE_OOP);
spec = MOO_CLASS_SPEC_MAKE (moo->c->cls.type_size, flags, moo->c->cls.indexed_type);
}
@ -7131,6 +7133,8 @@ static int __compile_class_definition (moo_t* moo, int extend)
* NOTE: when extending a class, class-module-import and variable-definition are not allowed.
*/
moo_oop_association_t ass;
moo_ioloc_t type_size_loc;
if (!extend && TOKEN_TYPE(moo) == MOO_IOTOK_LPAREN)
{
@ -7258,6 +7262,7 @@ static int __compile_class_definition (moo_t* moo, int extend)
return -1;
}
type_size_loc = moo->c->tok.loc;
GET_TOKEN (moo);
if (TOKEN_TYPE(moo) != MOO_IOTOK_RPAREN)
@ -7517,18 +7522,31 @@ static int __compile_class_definition (moo_t* moo, int extend)
/* [NOTE] class variables are not inherited.
* so no data about them are not transferred over */
if ((moo->c->cls.flags & CLASS_INDEXED) && moo->c->cls.indexed_type != MOO_OBJ_TYPE_OOP)
{
/* TODO: do i need to check if the parent class and the current class have the same indexed type? */
/* the class defined is a non-pointer object. */
if (MOO_CLASS_SPEC_INDEXED_TYPE(spec) == MOO_OBJ_TYPE_OOP && MOO_CLASS_SPEC_NAMED_INSTVARS(spec) > 0)
{
/* a non-pointer object cannot inherit from a pointer object with instance variables */
set_syntax_error (moo, MOO_SYNERR_CLASSTSIZEINVAL, &moo->c->cls.fqn_loc, &moo->c->cls.fqn); /* TODO: enhance error message */
return -1;
}
/* NOTE: I don't mandate that the parent and the child be of the same type.
* Say, for a parent class(#byte(4)), a child can be defined to be
* class(#word(4)). */
if (moo->c->cls.type_size < MOO_CLASS_SPEC_NAMED_INSTVARS(spec))
{
set_syntax_error (moo, MOO_SYNERR_CLASSTSIZEINVAL, TOKEN_LOC(moo), TOKEN_NAME(moo)); /* TODO: change error location... */
//set_syntax_error (moo, MOO_SYNERR_CLASSTSIZEINVAL, &type_size_loc, MOO_NULL); /* TODO: enhance error message */
set_syntax_error (moo, MOO_SYNERR_CLASSTSIZEINVAL, MOO_NULL, MOO_NULL); /* TODO: enhance error message */
return -1;
}
}
else
{
/* the class defined is a pointer object or a variable-pointer object */
MOO_ASSERT (moo, moo->c->cls.type_size == 0); /* no such thing as class(#pointer(N)). so it must be 0 */
moo->c->cls.var[VAR_INSTANCE].total_count = MOO_CLASS_SPEC_NAMED_INSTVARS(spec);
}
@ -7697,7 +7715,7 @@ static int compile_class_definition (moo_t* moo, int extend)
/* reset the structure to hold information about a class to be compiled */
moo->c->cls.flags = 0;
moo->c->cls.indexed_type = MOO_OBJ_TYPE_OOP;
moo->c->cls.indexed_type = MOO_OBJ_TYPE_OOP; /* whether indexed or not, it's the pointer type by default */
moo->c->cls.type_size = 0;
moo->c->cls.name.len = 0;