Merge branch 'feature/signature_type' into 'dev'

add signature type

See merge request ligolang/ligo!164

src/passes/6-transpiler/transpiler.ml

@@ -116,6 +116,7 @@ let rec transpile_type (t:AST.type_value) : type_value result =
   | T_constant ("timestamp", []) -> ok (T_base Base_timestamp)
   | T_constant ("unit", []) -> ok (T_base Base_unit)
   | T_constant ("operation", []) -> ok (T_base Base_operation)
+  | T_constant ("signature", []) -> ok (T_base Base_signature)
   | T_constant ("contract", [x]) ->
       let%bind x' = transpile_type x in
       ok (T_contract x')

src/passes/8-compiler/compiler_type.ml

@@ -68,6 +68,7 @@ module Ty = struct
     | Base_timestamp -> return timestamp_k
     | Base_bytes -> return bytes_k
     | Base_operation -> fail (not_comparable "operation")
+    | Base_signature -> fail (not_comparable "signature")
 
   let comparable_type : type_value -> ex_comparable_ty result = fun tv ->
     match tv with
@@ -97,6 +98,7 @@ module Ty = struct
     | Base_timestamp -> return timestamp
     | Base_bytes -> return bytes
     | Base_operation -> return operation
+    | Base_signature -> return signature
 
   let rec type_ : type_value -> ex_ty result =
     function
@@ -182,6 +184,7 @@ let base_type : type_base -> O.michelson result =
   | Base_timestamp -> ok @@ O.prim T_timestamp
   | Base_bytes -> ok @@ O.prim T_bytes
   | Base_operation -> ok @@ O.prim T_operation
+  | Base_signature -> ok @@ O.prim T_signature
 
 let rec type_ : type_value -> O.michelson result =
   function

src/stages/mini_c/PP.ml

@@ -20,6 +20,7 @@ let type_base ppf : type_base -> _ = function
   | Base_timestamp -> fprintf ppf "timestamp"
   | Base_bytes -> fprintf ppf "bytes"
   | Base_operation -> fprintf ppf "operation"
+  | Base_signature -> fprintf ppf "signature"
 
 let rec type_ ppf : type_value -> _ = function
   | T_or(a, b) -> fprintf ppf "(%a) | (%a)" annotated a annotated b

src/stages/mini_c/types.ml

@@ -6,7 +6,7 @@ type type_base =
   | Base_int | Base_nat | Base_tez
   | Base_timestamp
   | Base_string | Base_bytes | Base_address
-  | Base_operation
+  | Base_operation | Base_signature
 
 type 'a annotated = string option * 'a