patch 8.2.0312: Vim9: insufficient script tests

Problem:    Vim9: insufficient script tests.
Solution:   Add more tests.  Make "import * as Name" work.

src/proto/vim9script.pro

@@ -4,5 +4,6 @@ void ex_vim9script(exarg_T *eap);
 void ex_export(exarg_T *eap);
 void free_imports(int sid);
 void ex_import(exarg_T *eap);
-char_u *handle_import(char_u *arg_start, garray_T *gap, int sid);
+int find_exported(int sid, char_u **argp, int *name_len, ufunc_T **ufunc, type_T **type);
+char_u *handle_import(char_u *arg_start, garray_T *gap, int import_sid);
 /* vim: set ft=c : */

src/testdir/test_vim9_script.vim

@@ -330,6 +330,28 @@ def Test_vim9script()
   unlet g:imported_added
   unlet g:imported_func
   unlet g:imported_name g:imported_name_appended
+  delete('Ximport.vim')
+
+  let import_star_as_lines =<< trim END
+    vim9script
+    import * as Export from './Xexport.vim'
+    def UseExport()
+      g:imported = Export.exported
+    enddef
+    UseExport()
+  END
+  writefile(import_star_as_lines, 'Ximport.vim')
+  source Ximport.vim
+  assert_equal(9876, g:imported)
+
+  let import_star_lines =<< trim END
+    vim9script
+    import * from './Xexport.vim'
+    g:imported = exported
+  END
+  writefile(import_star_lines, 'Ximport.vim')
+  assert_fails('source Ximport.vim', 'E1045:')
+
   delete('Ximport.vim')
   delete('Xexport.vim')
 
@@ -352,6 +374,7 @@ def Test_vim9script_fails()
   CheckScriptFailure(['scriptversion 2', 'vim9script'], 'E1039:')
   CheckScriptFailure(['vim9script', 'scriptversion 2'], 'E1040:')
   CheckScriptFailure(['export let some = 123'], 'E1042:')
+  CheckScriptFailure(['import some from "./Xexport.vim"'], 'E1042:')
   CheckScriptFailure(['vim9script', 'export let g:some'], 'E1044:')
   CheckScriptFailure(['vim9script', 'export echo 134'], 'E1043:')
 

src/version.c

@@ -738,6 +738,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    312,
 /**/
     311,
 /**/

src/vim9compile.c

@@ -1522,7 +1522,11 @@ find_imported(char_u *name, size_t len, cctx_T *cctx)
  * Generate an instruction to load script-local variable "name".
  */
     static int
-compile_load_scriptvar(cctx_T *cctx, char_u *name)
+compile_load_scriptvar(
+	cctx_T *cctx,
+	char_u *name,	    // variable NUL terminated
+	char_u *start,	    // start of variable
+	char_u **end)	    // end of variable
 {
     scriptitem_T    *si = SCRIPT_ITEM(current_sctx.sc_sid);
     int		    idx = get_script_item_idx(current_sctx.sc_sid, name, FALSE);
@@ -1545,12 +1549,41 @@ compile_load_scriptvar(cctx_T *cctx, char_u *name)
 
     import = find_imported(name, 0, cctx);
     if (import != NULL)
+    {
+	if (import->imp_all)
+	{
+	    char_u	*p = skipwhite(*end);
+	    int		name_len;
+	    ufunc_T	*ufunc;
+	    type_T	*type;
+
+	    // Used "import * as Name", need to lookup the member.
+	    if (*p != '.')
+	    {
+		semsg(_("E1060: expected dot after name: %s"), start);
+		return FAIL;
+	    }
+	    ++p;
+
+	    idx = find_exported(import->imp_sid, &p, &name_len, &ufunc, &type);
+	    // TODO: what if it is a function?
+	    if (idx < 0)
+		return FAIL;
+	    *end = p;
+
+	    generate_VIM9SCRIPT(cctx, ISN_LOADSCRIPT,
+		    import->imp_sid,
+		    idx,
+		    type);
+	}
+	else
 	{
 	    // TODO: check this is a variable, not a function
 	    generate_VIM9SCRIPT(cctx, ISN_LOADSCRIPT,
 		    import->imp_sid,
 		    import->imp_var_vals_idx,
 		    import->imp_type);
+	}
 	return OK;
     }
 
@@ -1564,10 +1597,11 @@ compile_load_scriptvar(cctx_T *cctx, char_u *name)
  * When "error" is FALSE do not give an error when not found.
  */
     static int
-compile_load(char_u **arg, char_u *end, cctx_T *cctx, int error)
+compile_load(char_u **arg, char_u *end_arg, cctx_T *cctx, int error)
 {
     type_T	*type;
     char_u	*name;
+    char_u	*end = end_arg;
     int		res = FAIL;
 
     if (*(*arg + 1) == ':')
@@ -1589,7 +1623,7 @@ compile_load(char_u **arg, char_u *end, cctx_T *cctx, int error)
 	}
 	else if (**arg == 's')
 	{
-	    res = compile_load_scriptvar(cctx, name);
+	    res = compile_load_scriptvar(cctx, name, NULL, NULL);
 	}
 	else
 	{
@@ -1645,7 +1679,7 @@ compile_load(char_u **arg, char_u *end, cctx_T *cctx, int error)
 		else if (SCRIPT_ITEM(current_sctx.sc_sid)->sn_version
 							== SCRIPT_VERSION_VIM9)
 		    // in Vim9 script "var" can be script-local.
-		   res = compile_load_scriptvar(cctx, name);
+		   res = compile_load_scriptvar(cctx, name, *arg, &end);
 	    }
 	}
 	if (gen_load)
@@ -3412,7 +3446,7 @@ compile_assignment(char_u *arg, exarg_T *eap, cmdidx_T cmdidx, cctx_T *cctx)
 		    generate_LOAD(cctx, ISN_LOADG, 0, name + 2, type);
 		    break;
 		case dest_script:
-		    compile_load_scriptvar(cctx, name + (name[1] == ':' ? 2 : 0));
+		    compile_load_scriptvar(cctx, name + (name[1] == ':' ? 2 : 0), NULL, NULL);
 		    break;
 		case dest_env:
 		    // Include $ in the name here

src/vim9script.c

@@ -150,6 +150,88 @@ ex_import(exarg_T *eap)
     }
 }
 
+/*
+ * Find an exported item in "sid" matching the name at "*argp".
+ * When it is a variable return the index.
+ * When it is a user function return "*ufunc".
+ * When not found returns -1 and "*ufunc" is NULL.
+ */
+    int
+find_exported(
+	int	    sid,
+	char_u	    **argp,
+	int	    *name_len,
+	ufunc_T	    **ufunc,
+	type_T	    **type)
+{
+    char_u	*name = *argp;
+    char_u	*arg = *argp;
+    int		cc;
+    int		idx = -1;
+    svar_T	*sv;
+    scriptitem_T *script = SCRIPT_ITEM(sid);
+
+    // isolate one name
+    while (eval_isnamec1(*arg))
+	++arg;
+    *name_len = (int)(arg - name);
+
+    // find name in "script"
+    // TODO: also find script-local user function
+    cc = *arg;
+    *arg = NUL;
+    idx = get_script_item_idx(sid, name, FALSE);
+    if (idx >= 0)
+    {
+	sv = ((svar_T *)script->sn_var_vals.ga_data) + idx;
+	if (!sv->sv_export)
+	{
+	    semsg(_("E1049: Item not exported in script: %s"), name);
+	    *arg = cc;
+	    return -1;
+	}
+	*type = sv->sv_type;
+	*ufunc = NULL;
+    }
+    else
+    {
+	char_u	buffer[200];
+	char_u	*funcname;
+
+	// it could be a user function.
+	if (STRLEN(name) < sizeof(buffer) - 10)
+	    funcname = buffer;
+	else
+	{
+	    funcname = alloc(STRLEN(name) + 10);
+	    if (funcname == NULL)
+	    {
+		*arg = cc;
+		return -1;
+	    }
+	}
+	funcname[0] = K_SPECIAL;
+	funcname[1] = KS_EXTRA;
+	funcname[2] = (int)KE_SNR;
+	sprintf((char *)funcname + 3, "%ld_%s", (long)sid, name);
+	*ufunc = find_func(funcname, NULL);
+	if (funcname != buffer)
+	    vim_free(funcname);
+
+	if (*ufunc == NULL)
+	{
+	    semsg(_("E1048: Item not found in script: %s"), name);
+	    *arg = cc;
+	    return -1;
+	}
+    }
+    *arg = cc;
+    arg = skipwhite(arg);
+    *argp = arg;
+
+    return idx;
+}
+
 /*
  * Handle an ":import" command and add the resulting imported_T to "gap", when
  * not NULL, or script "import_sid" sn_imports.
@@ -289,8 +371,6 @@ handle_import(char_u *arg_start, garray_T *gap, int import_sid)
     }
     else
     {
-	scriptitem_T *script = SCRIPT_ITEM(sid);
-
 	arg = arg_start;
 	if (*arg == '{')
 	    arg = skipwhite(arg + 1);
@@ -298,68 +378,15 @@ handle_import(char_u *arg_start, garray_T *gap, int import_sid)
 	{
 	    char_u	*name = arg;
 	    int		name_len;
-	    int		cc;
 	    int		idx;
-	    svar_T	*sv;
 	    imported_T	*imported;
-	    ufunc_T	*ufunc;
+	    ufunc_T	*ufunc = NULL;
+	    type_T	*type;
 
-	    // isolate one name
-	    while (eval_isnamec1(*arg))
-		++arg;
-	    name_len = (int)(arg - name);
+	    idx = find_exported(sid, &arg, &name_len, &ufunc, &type);
 
-	    // find name in "script"
-	    // TODO: also find script-local user function
-	    cc = *arg;
-	    *arg = NUL;
-	    idx = get_script_item_idx(sid, name, FALSE);
-	    if (idx >= 0)
-	    {
-		sv = ((svar_T *)script->sn_var_vals.ga_data) + idx;
-		if (!sv->sv_export)
-		{
-		    semsg(_("E1049: Item not exported in script: %s"), name);
-		    *arg = cc;
+	    if (idx < 0 && ufunc == NULL)
 		return NULL;
-		}
-		ufunc = NULL;
-	    }
-	    else
-	    {
-		char_u	buffer[200];
-		char_u	*funcname;
-
-		// it could be a user function.
-		if (STRLEN(name) < sizeof(buffer) - 10)
-		    funcname = buffer;
-		else
-		{
-		    funcname = alloc(STRLEN(name) + 10);
-		    if (funcname == NULL)
-		    {
-			*arg = cc;
-			return NULL;
-		    }
-		}
-		funcname[0] = K_SPECIAL;
-		funcname[1] = KS_EXTRA;
-		funcname[2] = (int)KE_SNR;
-		sprintf((char *)funcname + 3, "%ld_%s", (long)sid, name);
-		ufunc = find_func(funcname, NULL);
-		if (funcname != buffer)
-		    vim_free(funcname);
-
-		if (ufunc == NULL)
-		{
-		    semsg(_("E1048: Item not found in script: %s"), name);
-		    *arg = cc;
-		    return NULL;
-		}
-		sv = NULL;
-	    }
-	    *arg = cc;
-	    arg = skipwhite(arg);
 
 	    imported = new_imported(gap != NULL ? gap
 				       : &SCRIPT_ITEM(import_sid)->sn_imports);
@@ -372,7 +399,7 @@ handle_import(char_u *arg_start, garray_T *gap, int import_sid)
 	    imported->imp_sid = sid;
 	    if (idx >= 0)
 	    {
-		imported->imp_type = sv->sv_type;
+		imported->imp_type = type;
 		imported->imp_var_vals_idx = idx;
 	    }
 	    else