patch 9.1.0994: Vim9: not able to use comment after opening curly brace

Problem:  Vim9: not able to use comment after opening curly brace
          (lifepillar)
Solution: allow to use comments after curly braces of an inner-block,
          modify the logic to search for comment in a line, update Vim9
          tests to use specific class type instead of any
          (Yegappan Lakshmanan)

fixes: #16363
closes: #16405

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/testdir/test_vim9_class.vim

@@ -4345,23 +4345,20 @@ def Test_lockvar_object_variable()
   END
   v9.CheckSourceFailure(lines, 'E1335: Variable "val4" in class "C" is not writable')
 
-  # TODO: the following tests use type "any" for argument. Need a run time
-  #       check for access. Probably OK as is for now.
-
   # read-only lockvar from object method arg
   lines =<< trim END
     vim9script
 
     class C
       var val5: number
-      def Lock(o_any: any)
+      def Lock(c: C)
-        lockvar o_any.val5
+        lockvar c.val5
       enddef
     endclass
     var o = C.new(3)
     o.Lock(C.new(5))
   END
-  v9.CheckSourceFailure(lines, 'E1391: Cannot (un)lock variable "o_any.val5" in class "C"')
+  v9.CheckSourceFailure(lines, 'E1391: Cannot (un)lock variable "c.val5" in class "C"')
 
   # read-only lockvar from class method arg
   lines =<< trim END
@@ -4369,14 +4366,14 @@ def Test_lockvar_object_variable()
 
     class C
       var val6: number
-      static def Lock(o_any: any)
+      static def Lock(c: C)
-        lockvar o_any.val6
+        lockvar c.val6
       enddef
     endclass
     var o = C.new(3)
     C.Lock(o)
   END
-  v9.CheckSourceFailure(lines, 'E1391: Cannot (un)lock variable "o_any.val6" in class "C"')
+  v9.CheckSourceFailure(lines, 'E1391: Cannot (un)lock variable "c.val6" in class "C"')
 
   #
   # lockvar of public object variable
@@ -4444,14 +4441,14 @@ def Test_lockvar_object_variable()
 
     class C
       public var val5: number
-      def Lock(o_any: any)
+      def Lock(c: C)
-        lockvar o_any.val5
+        lockvar c.val5
       enddef
     endclass
     var o = C.new(3)
     o.Lock(C.new(5))
   END
-  v9.CheckSourceFailure(lines, 'E1391: Cannot (un)lock variable "o_any.val5" in class "C"', 1)
+  v9.CheckSourceFailure(lines, 'E1391: Cannot (un)lock variable "c.val5" in class "C"', 1)
 
   # lockvar from class method arg
   lines =<< trim END
@@ -4459,14 +4456,14 @@ def Test_lockvar_object_variable()
 
     class C
       public var val6: number
-      static def Lock(o_any: any)
+      static def Lock(c: C)
-        lockvar o_any.val6
+        lockvar c.val6
       enddef
     endclass
     var o = C.new(3)
     C.Lock(o)
   END
-  v9.CheckSourceFailure(lines, 'E1391: Cannot (un)lock variable "o_any.val6" in class "C"', 1)
+  v9.CheckSourceFailure(lines, 'E1391: Cannot (un)lock variable "c.val6" in class "C"', 1)
 enddef
 
 " Test trying to lock a class variable from various places

src/testdir/test_vim9_func.vim

@@ -4697,6 +4697,23 @@ def Test_test_override_defcompile()
   test_override('defcompile', 0)
 enddef
 
+" Test for using a comment after the opening curly brace of an inner block.
+def Test_comment_after_inner_block()
+  var lines =<< trim END
+    vim9script
+
+    def F(G: func)
+    enddef
+
+    F(() => {       # comment1
+      F(() => {     # comment2
+        echo 'ok'   # comment3
+      })            # comment4
+    })              # comment5
+  END
+  v9.CheckScriptSuccess(lines)
+enddef
+
 " The following messes up syntax highlight, keep near the end.
 if has('python3')
   def Test_python3_command()

src/testdir/test_vim9_script.vim

@@ -595,6 +595,27 @@ def Test_autocommand_block()
   unlet g:otherVar
 enddef
 
+def Test_block_in_a_string()
+  var lines =<< trim END
+    vim9script
+
+    def Foo(): string
+      var x = ' => { # abc'
+      return x
+    enddef
+
+    assert_equal(' => { # abc', Foo())
+
+    def Bar(): string
+      var x = " => { # abc"
+      return x
+    enddef
+
+    assert_equal(" => { # abc", Bar())
+  END
+  v9.CheckSourceSuccess(lines)
+enddef
+
 func g:NoSuchFunc()
   echo 'none'
 endfunc

src/userfunc.c

@@ -859,6 +859,92 @@ function_using_block_scopes(ufunc_T *fp, cstack_T *cstack)
 	cstack->cs_flags[i] |= CSF_FUNC_DEF;
 }
 
+/*
+ * Skip over all the characters in a single quoted string starting at "p" and
+ * return a pointer to the character following the ending single quote.
+ * If the ending single quote is missing, then return a pointer to the NUL
+ * character.
+ */
+    static char_u *
+skip_single_quote_string(char_u *p)
+{
+    p++;	    // skip the beginning single quote
+    while (*p != NUL)
+    {
+	// Within the string, a single quote can be escaped by using
+	// two single quotes.
+	if (*p == '\'' && *(p + 1) == '\'')
+	    p += 2;
+	else if (*p == '\'')
+	{
+	    p++;    // skip the ending single quote
+	    break;
+	}
+	else
+	    MB_PTR_ADV(p);
+    }
+
+    return p;
+}
+
+/*
+ * Skip over all the characters in a double quoted string starting at "p" and
+ * return a pointer to the character following the ending double quote.
+ * If the ending double quote is missing, then return a pointer to the NUL
+ * character.
+ */
+    static char_u *
+skip_double_quote_string(char_u *p)
+{
+    p++;	    // skip the beginning double quote
+    while (*p != NUL)
+    {
+	// Within the string, a double quote can be escaped by
+	// preceding it with a backslash.
+	if (*p == '\\' && *(p + 1) == '"')
+	    p += 2;
+	else if (*p == '"')
+	{
+	    p++;    // skip the ending double quote
+	    break;
+	}
+	else
+	    MB_PTR_ADV(p);
+    }
+
+    return p;
+}
+
+/*
+ * Return the start of a Vim9 comment (#) in the line starting at "line".
+ * If a comment is not found, then returns a pointer to the end of the
+ * string (NUL).
+ */
+    static char_u *
+find_start_of_vim9_comment(char_u *line)
+{
+    char_u	*p = line;
+
+    while (*p != NUL)
+    {
+	if (*p == '\'')
+	    // Skip a single quoted string.
+	    p = skip_single_quote_string(p);
+	else if (*p == '"')
+	    // Skip a double quoted string.
+	    p = skip_double_quote_string(p);
+	else
+	{
+	    if (*p == '#')
+		// Found the start of a Vim9 comment
+		break;
+	    MB_PTR_ADV(p);
+	}
+    }
+
+    return p;
+}
+
 /*
  * Read the body of a function, put every line in "newlines".
  * This stops at "}", "endfunction" or "enddef".
@@ -1123,7 +1209,17 @@ get_function_body(
 	    if (nesting_def[nesting] ? *p != '#' : *p != '"')
 	    {
 		// Not a comment line: check for nested inline function.
+
+		if (nesting_inline[nesting])
+		{
+		    // A comment (#) can follow the opening curly brace of a
+		    // block statement.  Need to ignore the comment and look
+		    // for the opening curly brace before the comment.
+		    end = find_start_of_vim9_comment(p) - 1;
+		}
+		else
 		    end = p + STRLEN(p) - 1;
+
 		while (end > p && VIM_ISWHITE(*end))
 		    --end;
 		if (end > p + 1 && *end == '{' && VIM_ISWHITE(end[-1]))

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    994,
 /**/
     993,
 /**/