patch 9.0.1914: Vim9: few issues when accessing object members
Commit:
https://github.com/vim/vim/commit/1db151436541a3e64cdd5e3d9eb3ace1ce1e1ad0
Author: Yegappan Lakshmanan <yegap...@yahoo.com>
Date: Tue Sep 19 20:34:05 2023 +0200
patch 9.0.1914: Vim9: few issues when accessing object members
Problem: Vim9: few issues when accessing object members
Solution: When calling an object method, check for null object.
Accessing a Dict object member doesn't work.
closes: #13119
closes: #13123
closes: #13124
Signed-off-by: Christian Brabandt <c...@256bit.org>
Co-authored-by: Yegappan Lakshmanan <yegap...@yahoo.com>
diff --git a/src/eval.c b/src/eval.c
index 0f952ee3e..931d51045 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1582,7 +1582,6 @@ get_lval(
lp->ll_tv->vval.v_object + 1)) + m_idx;
else
lp->ll_tv = &cl->class_members_tv[m_idx];
- break;
}
}
diff --git a/src/structs.h b/src/structs.h
index 4a82c82e6..f5ad17414 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1881,6 +1881,13 @@ struct ufunc_S
#define FC_NEW 0x8000 // constructor
#define FC_ABSTRACT 0x10000 // abstract method
+// Is "ufunc" an object method?
+#define IS_OBJECT_METHOD(ufunc) ((ufunc->uf_flags & FC_OBJECT) == FC_OBJECT)
+// Is "ufunc" a class new() constructor method?
+#define IS_CONSTRUCTOR_METHOD(ufunc) ((ufunc->uf_flags & FC_NEW) == FC_NEW)
+// Is "ufunc" an abstract class method?
+#define IS_ABSTRACT_METHOD(ufunc) ((ufunc->uf_flags & FC_ABSTRACT) ==
FC_ABSTRACT)
+
#define MAX_FUNC_ARGS 20 // maximum number of function arguments
#define VAR_SHORT_LEN 20 // short variable name length
#define FIXVAR_CNT 12 // number of fixed variables
diff --git a/src/testdir/test_vim9_class.vim b/src/testdir/test_vim9_class.vim
index 1021114a9..763b5a539 100644
--- a/src/testdir/test_vim9_class.vim
+++ b/src/testdir/test_vim9_class.vim
@@ -1507,6 +1507,7 @@ def Test_class_member()
END
v9.CheckSourceFailure(lines, 'E1340: Argument already declared in the class:
count')
+ # Use a local variable in a method with the same name as a class variable
lines =<< trim END
vim9script
@@ -5488,4 +5489,114 @@ def Test_nested_object_assignment()
v9.CheckSourceFailure(lines, 'E46: Cannot change read-only variable "value"')
enddef
+" Test for calling methods using a null object
+def Test_null_object_method_call()
+ # Calling a object method using a null object in script context
+ var lines =<< trim END
+ vim9script
+
+ class C
+ def Foo()
+ assert_report('This method should not be executed')
+ enddef
+ endclass
+
+ var o: C
+ o.Foo()
+ END
+ v9.CheckSourceFailure(lines, 'E1360: Using a null object', 10)
+
+ # Calling a object method using a null object in def function context
+ lines =<< trim END
+ vim9script
+
+ class C
+ def Foo()
+ assert_report('This method should not be executed')
+ enddef
+ endclass
+
+ def T()
+ var o: C
+ o.Foo()
+ enddef
+ T()
+ END
+ v9.CheckSourceFailure(lines, 'E1360: Using a null object', 2)
+
+ # Calling a object method through another class method using a null object in
+ # script context
+ lines =<< trim END
+ vim9script
+
+ class C
+ def Foo()
+ assert_report('This method should not be executed')
+ enddef
+
+ static def Bar(o_any: any)
+ var o_typed: C = o_any
+ o_typed.Foo()
+ enddef
+ endclass
+
+ var o: C
+ C.Bar(o)
+ END
+ v9.CheckSourceFailure(lines, 'E1360: Using a null object', 2)
+
+ # Calling a object method through another class method using a null object in
+ # def function context
+ lines =<< trim END
+ vim9script
+
+ class C
+ def Foo()
+ assert_report('This method should not be executed')
+ enddef
+
+ static def Bar(o_any: any)
+ var o_typed: C = o_any
+ o_typed.Foo()
+ enddef
+ endclass
+
+ def T()
+ var o: C
+ C.Bar(o)
+ enddef
+ T()
+ END
+ v9.CheckSourceFailure(lines, 'E1360: Using a null object', 2)
+enddef
+
+" Test for using a dict as an object member
+def Test_dict_object_member()
+ var lines =<< trim END
+ vim9script
+
+ class Context
+ public this.state: dict<number> = {}
+ def GetState(): dict<number>
+ return this.state
+ enddef
+ endclass
+
+ var ctx = Context.new()
+ ctx.state->extend({a: 1})
+ ctx.state['b'] = 2
+ assert_equal({a: 1, b: 2}, ctx.GetState())
+
+ def F()
+ ctx.state['c'] = 3
+ assert_equal({a: 1, b: 2, c: 3}, ctx.GetState())
+ enddef
+ F()
+ assert_equal(3, ctx.state.c)
+ ctx.state.c = 4
+ assert_equal(4, ctx.state.c)
+ END
+ v9.CheckSourceSuccess(lines)
+enddef
+
" vim: ts=8 sw=2 sts=2 expandtab tw=80 fdm=marker
diff --git a/src/version.c b/src/version.c
index c43b28f37..809fb6081 100644
--- a/src/version.c
+++ b/src/version.c
@@ -699,6 +699,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1914,
/**/
1913,
/**/
diff --git a/src/vim9class.c b/src/vim9class.c
index f122f90c1..a2e305c0a 100644
--- a/src/vim9class.c
+++ b/src/vim9class.c
@@ -534,7 +534,7 @@ validate_abstract_class_methods(
for (int i = 0; i < extends_method_count; i++)
{
ufunc_T *uf = extends_methods[i];
- if ((uf->uf_flags & FC_ABSTRACT) == 0)
+ if (!IS_ABSTRACT_METHOD(uf))
continue;
int method_found = FALSE;
diff --git a/src/vim9cmds.c b/src/vim9cmds.c
index 3f44b8873..0ca3be11a 100644
--- a/src/vim9cmds.c
+++ b/src/vim9cmds.c
@@ -2617,7 +2617,7 @@ compile_return(char_u *arg, int check_return_type, int
legacy, cctx_T *cctx)
return NULL;
}
- if (cctx->ctx_ufunc->uf_flags & FC_NEW)
+ if (IS_CONSTRUCTOR_METHOD(cctx->ctx_ufunc))
{
// For a class new() constructor, return an object of the class.
generate_instr(cctx, ISN_RETURN_OBJECT);
diff --git a/src/vim9compile.c b/src/vim9compile.c
index ab063f9ff..a8d8c7d22 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -3286,7 +3286,7 @@ compile_def_function(
// In the constructor allocate memory for the object and initialize the
// object members.
- if ((ufunc->uf_flags & FC_NEW) == FC_NEW)
+ if (IS_CONSTRUCTOR_METHOD(ufunc))
{
generate_CONSTRUCT(&cctx, ufunc->uf_class);
@@ -3949,7 +3949,7 @@ nextline:
if (ufunc->uf_ret_type->tt_type == VAR_UNKNOWN)
ufunc->uf_ret_type = &t_void;
else if (ufunc->uf_ret_type->tt_type != VAR_VOID
- && (ufunc->uf_flags & FC_NEW) != FC_NEW)
+ && !IS_CONSTRUCTOR_METHOD(ufunc))
{
emsg(_(e_missing_return_statement));
goto erret;
@@ -3957,7 +3957,7 @@ nextline:
// Return void if there is no return at the end.
// For a constructor return the object.
- if ((ufunc->uf_flags & FC_NEW) == FC_NEW)
+ if (IS_CONSTRUCTOR_METHOD(ufunc))
{
generate_instr(&cctx, ISN_RETURN_OBJECT);
ufunc->uf_ret_type = &ufunc->uf_class->class_object_type;
diff --git a/src/vim9execute.c b/src/vim9execute.c
index 7c61ff418..23dee1cfc 100644
--- a/src/vim9execute.c
+++ b/src/vim9execute.c
@@ -535,6 +535,15 @@ call_dfunc(
// If this is an object method, the object is just before the arguments.
typval_T *obj = STACK_TV_BOT(0) - argcount - vararg_count - 1;
+ if (obj->v_type == VAR_OBJECT && obj->vval.v_object == NULL
+ && !IS_CONSTRUCTOR_METHOD(ufunc))
+ {
+ // If this is not the constructor method, then a valid object is
+ // needed.
+ emsg(_(e_using_null_object));
+ return FAIL;
+ }
+
// Check the argument types.
if (check_ufunc_arg_types(ufunc, argcount, vararg_count, ectx) == FAIL)
return FAIL;
@@ -599,7 +608,7 @@ call_dfunc(
// For an object method move the object from just before the arguments to
// the first local variable.
- if (ufunc->uf_flags & FC_OBJECT)
+ if (IS_OBJECT_METHOD(ufunc))
{
*STACK_TV_VAR(0) = *obj;
obj->v_type = VAR_UNKNOWN;
@@ -1148,7 +1157,7 @@ func_return(ectx_T *ectx)
// Clear the arguments. If this was an object method also clear the
// object, it is just before the arguments.
int top = ectx->ec_frame_idx - argcount;
- if (dfunc->df_ufunc->uf_flags & FC_OBJECT)
+ if (IS_OBJECT_METHOD(dfunc->df_ufunc))
--top;
for (idx = top; idx < ectx->ec_frame_idx; ++idx)
clear_tv(STACK_TV(idx));
--
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