[Linux-kernel-mentees] [PATCH] parsing_c: Handle case of annotation and ; or = after ident

[Jaskaran Singh]

For the following case:

[const_vol] <type> [ptr] <identifier> <annotation> <semicolon|eq>

The lookahead function in Parsing_hacks would mislabel <identifier> as a
CppDirective.

Add cases in the lookahead function for handling this case.

Signed-off-by: Jaskaran Singh <jaskaransingh7654321 at gmail.com>
---
 parsing_c/parsing_hacks.ml | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/parsing_c/parsing_hacks.ml b/parsing_c/parsing_hacks.ml
index 56857f3c..43421647 100644
--- a/parsing_c/parsing_hacks.ml
+++ b/parsing_c/parsing_hacks.ml
@@ -1887,6 +1887,11 @@ let not_struct_enum = function
     (Parser_c.Tstruct _ | Parser_c.Tunion _ | Parser_c.Tenum _)::_ -> false
   | _ -> true
 
+let is_struct_enum = function
+  | (Parser_c.TIdent _)::
+    (Parser_c.Tstruct _ | Parser_c.Tunion _ | Parser_c.Tenum _)::_ -> true
+  | _ -> false
+
 let not_opar = function
     TOPar _ -> false
   | _ -> true
@@ -2061,6 +2066,32 @@ let lookahead2 ~pass next before =
 	&& is_type type_ ->
 	  TCommentCpp (Token_c.CppDirective, i1)
 
+	(* tt xx yy; : yy is an annot *)
+  | (TIdent (s, i1)::(TPtVirg _|TEq _)::_, TIdent (s2, i2)::type_::rest)
+    when (is_struct_enum (type_::rest)
+	|| is_type type_)
+	&& s ==~ regexp_annot ->
+	  TCommentCpp (Token_c.CppMacro, i1)
+
+	(* tt * xx yy; : yy is an annot *)
+  | (TIdent (s, i1)::(TPtVirg _|TEq _)::_, TIdent (s2, i2)::ptr)
+    when pointer ptr
+	&& s ==~ regexp_annot ->
+	  TCommentCpp (Token_c.CppMacro, i1)
+
+	(* tt xx yy; : yy is an annot, so xx is an ident *)
+  | (TIdent (s, i1)::TIdent (s2, i2)::(TPtVirg _|TEq _)::_, seen::_)
+    when (is_struct_enum before
+	|| is_type seen)
+	&& s2 ==~ regexp_annot ->
+	  TIdent (s, i1)
+
+	(* tt * xx yy; : yy is an annot, so xx is an ident *)
+  | (TIdent (s, i1)::TIdent (s2, i2)::(TPtVirg _|TEq _)::_, ptr)
+    when pointer ptr
+	&& s2 ==~ regexp_annot ->
+	  TIdent (s, i1)
+
 	(* tt xx yy *)
   | (TIdent (s, i1)::TIdent (s2, i2)::_  , seen::_)
     when not_struct_enum before
-- 
2.21.1