[Linux-kernel-mentees] [PATCH 01/13] parsing_cocci: Align C AST and SmPL AST for enum

[Jaskaran Singh]

The C AST and SmPL AST differs with respect to the enum type.

For an enumerator, the C AST is as follows:
	Enum -> list of (name, (info, expression))

For the same, the SmPL AST is as follows:
	EnumDef -> list of expression

While the SmPL parser does make sure that enumerators are
parsed as per C rules, the OCaml types for an enumerator themselves
mismatch, due to their organization. This causes bugs/mismatches for
cases where enums are in disjunctions.

Make the enumerator type of the SmPL AST closer to that of
the C AST.

Signed-off-by: Jaskaran Singh <jaskaransingh7654321 at gmail.com>
---
 parsing_cocci/ast0_cocci.ml  | 11 ++++++++++-
 parsing_cocci/ast0_cocci.mli | 10 +++++++++-
 parsing_cocci/ast_cocci.ml   |  9 ++++++++-
 parsing_cocci/ast_cocci.mli  | 10 +++++++++-
 4 files changed, 36 insertions(+), 4 deletions(-)

diff --git a/parsing_cocci/ast0_cocci.ml b/parsing_cocci/ast0_cocci.ml
index 77dc46f0..b3d8b137 100644
--- a/parsing_cocci/ast0_cocci.ml
+++ b/parsing_cocci/ast0_cocci.ml
@@ -211,7 +211,7 @@ and base_typeC =
 	               string mcode (* ) *) (* IBM C only *)
   | EnumName        of string mcode (*enum*) * ident option (* name *)
   | EnumDef  of typeC (* either StructUnionName or metavar *) *
-	string mcode (* { *) * expression dots * string mcode (* } *)
+	string mcode (* { *) * enum_decl dots * string mcode (* } *)
   | StructUnionName of Ast.structUnion mcode * ident option (* name *)
   | StructUnionDef  of typeC (* either StructUnionName or metavar *) *
 	string mcode (* { *) * field dots * string mcode (* } *)
@@ -288,6 +288,15 @@ and bitfield = string mcode (* : *) * expression
 
 and field = base_field wrap
 
+and base_enum_decl =
+    Enum of ident * (string mcode (* = *) * expression) option
+  | EnumComma of string mcode (* , *)
+  | EnumDots of string mcode (* ... *) * (string mcode * string mcode *
+                enum_decl) option (* whencode *)
+
+and enum_decl = base_enum_decl wrap
+
+
 (* --------------------------------------------------------------------- *)
 (* Initializers *)
 
diff --git a/parsing_cocci/ast0_cocci.mli b/parsing_cocci/ast0_cocci.mli
index 274c6bc2..732a1345 100644
--- a/parsing_cocci/ast0_cocci.mli
+++ b/parsing_cocci/ast0_cocci.mli
@@ -202,7 +202,7 @@ and base_typeC =
 	               string mcode (* ) *) (* IBM C only *)
   | EnumName        of string mcode (*enum*) * ident option (* name *)
   | EnumDef  of typeC (* either StructUnionName or metavar *) *
-	string mcode (* { *) * expression dots * string mcode (* } *)
+	string mcode (* { *) * enum_decl dots * string mcode (* } *)
   | StructUnionName of Ast_cocci.structUnion mcode * ident option (* name *)
   | StructUnionDef  of typeC (* either StructUnionName or metavar *) *
 	string mcode (* { *) * field dots * string mcode (* } *)
@@ -276,6 +276,14 @@ and bitfield = string mcode (* : *) * expression
 
 and field = base_field wrap
 
+and base_enum_decl =
+    Enum of ident * (string mcode (* = *) * expression) option
+  | EnumComma of string mcode (* , *)
+  | EnumDots of string mcode (* ... *) * (string mcode * string mcode *
+                enum_decl) option (* whencode *)
+
+and enum_decl = base_enum_decl wrap
+
 (* --------------------------------------------------------------------- *)
 (* Initializers *)
 
diff --git a/parsing_cocci/ast_cocci.ml b/parsing_cocci/ast_cocci.ml
index ba6ec29e..8fa64dcc 100644
--- a/parsing_cocci/ast_cocci.ml
+++ b/parsing_cocci/ast_cocci.ml
@@ -351,7 +351,7 @@ and base_typeC =
 	               string mcode (* ) *) (* IBM C only *)
   | EnumName        of string mcode (*enum*) * ident option (* name *)
   | EnumDef  of fullType (* either EnumName or metavar *) *
-	string mcode (* { *) * expression dots * string mcode (* } *)
+	string mcode (* { *) * enum_decl dots * string mcode (* } *)
   | StructUnionName of structUnion mcode * ident option (* name *)
   | StructUnionDef  of fullType (* either StructUnionName or metavar *) *
 	string mcode (* { *) * annotated_field dots * string mcode (* } *)
@@ -443,6 +443,13 @@ and base_annotated_field =
 
 and annotated_field = base_annotated_field wrap
 
+and base_enum_decl =
+    Enum of ident * (string mcode (* = *) * expression) option
+  | EnumComma of string mcode (* , *)
+  | EnumDots of string mcode (* ... *) * enum_decl option (* whencode *)
+
+and enum_decl = base_enum_decl wrap
+
 (* --------------------------------------------------------------------- *)
 (* Initializers *)
 
diff --git a/parsing_cocci/ast_cocci.mli b/parsing_cocci/ast_cocci.mli
index 5f21664b..e921f917 100644
--- a/parsing_cocci/ast_cocci.mli
+++ b/parsing_cocci/ast_cocci.mli
@@ -333,7 +333,7 @@ and base_typeC =
 	               string mcode (* ) *) (* IBM C only *)
   | EnumName        of string mcode (*enum*) * ident option (* name *)
   | EnumDef  of fullType (* either EnumName or metavar *) *
-	string mcode (* { *) * expression dots * string mcode (* } *)
+	string mcode (* { *) * enum_decl dots * string mcode (* } *)
   | StructUnionName of structUnion mcode * ident option (* name *)
   | StructUnionDef  of fullType (* either StructUnionName or metavar *) *
 	string mcode (* { *) * annotated_field dots * string mcode (* } *)
@@ -424,6 +424,14 @@ and base_annotated_field =
 
 and annotated_field = base_annotated_field wrap
 
+and base_enum_decl =
+    Enum of ident * (string mcode (* = *) * expression) option
+  | EnumComma of string mcode (* , *)
+  | EnumDots of string mcode (* ... *) * enum_decl option (* whencode *)
+
+and enum_decl = base_enum_decl wrap
+
+
 (* --------------------------------------------------------------------- *)
 (* Initializers *)
 
-- 
2.21.1