1 files changed, 10 insertions, 10 deletions
diff --git a/neb/std/types.py b/neb/std/types.py
index b5fb993..f8d5405 100644
--- a/neb/std/types.py
+++ b/neb/std/types.py
@@ -6,33 +6,33 @@ TYPES = Environment()
 def interpretIsBool(symbol, args, env, ns):
     return Bool(isinstance(args[0], Bool))
 
-TYPES.register("bool?", Builtin("bool?", interpretIsBool, [Arg("arg", TypeEnum.ANY)]))
+TYPES.register("bool?", Builtin("bool?", interpretIsBool, [Arg("arg", TypeEnum.ANY)], return_type=Type(":bool")))
 
 def interpretIsFloat(symbol, args, env, ns):
     return Bool(isinstance(args[0], Float))
 
-TYPES.register("float?", Builtin("float?", interpretIsFloat, [Arg("arg", TypeEnum.ANY)]))
+TYPES.register("float?", Builtin("float?", interpretIsFloat, [Arg("arg", TypeEnum.ANY)], return_type=Type(":bool")))
 
 def interpretIsNumber(symbol, args, env, ns):
     ret = isinstance(args[0], Int) or isinstance(args[0], Float)
     return Bool(ret)
 
-TYPES.register("number?", Builtin("number?", interpretIsNumber, [Arg("arg", TypeEnum.ANY)]))
+TYPES.register("number?", Builtin("number?", interpretIsNumber, [Arg("arg", TypeEnum.ANY)], return_type=Type(":bool")))
 
 def interpretIsInt(symbol, args, env, ns):
     return Bool(isinstance(args[0], Int))
 
-TYPES.register("int?", Builtin("int?", interpretIsInt, [Arg("arg", TypeEnum.ANY)]))
+TYPES.register("int?", Builtin("int?", interpretIsInt, [Arg("arg", TypeEnum.ANY)], return_type=Type(":bool")))
 
 def interpretIsList(symbol, args, env, ns):
     return Bool(isinstance(args[0], List))
 
-TYPES.register("list?", Builtin("list?", interpretIsList, [Arg("arg", TypeEnum.ANY)]))
+TYPES.register("list?", Builtin("list?", interpretIsList, [Arg("arg", TypeEnum.ANY)], return_type=Type(":bool")))
 
 def interpretIsString(symbol, args, env, ns):
     return Bool(isinstance(args[0], String))
 
-TYPES.register("string?", Builtin("string?", interpretIsString, [Arg("arg", TypeEnum.ANY)]))
+TYPES.register("string?", Builtin("string?", interpretIsString, [Arg("arg", TypeEnum.ANY)], return_type=Type(":bool")))
 
 def interpretStringToInt(symbol, args, env, ns):
     try:
@@ -41,7 +41,7 @@ def interpretStringToInt(symbol, args, env, ns):
     except:
         raise InterpretPanic(symbol, "can't convert to an :int", args[0])
 
-TYPES.register("string->int", Builtin("string->int", interpretStringToInt, [Arg("arg", TypeEnum.STRING)]))
+TYPES.register("string->int", Builtin("string->int", interpretStringToInt, [Arg("arg", TypeEnum.STRING)], return_type=Type(":int")))
 
 def interpretToString(symbol, args, env, ns):
     item = args[0]
@@ -52,7 +52,7 @@ def interpretToString(symbol, args, env, ns):
     else:
         return String(f"{item}")
 
-TYPES.register("->string", Builtin("->string", interpretToString, [Arg("arg", TypeEnum.ANY)]))
+TYPES.register("->string", Builtin("->string", interpretToString, [Arg("arg", TypeEnum.ANY)], return_type=Type(":string")))
 
 def interpretTypeOf(symbol, args, env, ns):
     return Type(f"{args[0].type_}")
@@ -62,12 +62,12 @@ TYPES.register("typeof", Builtin("typeof", interpretTypeOf, [Arg("candidate", Ty
 def interpretIsAny(symbol, args, env, ns):
     return Bool(True)
 
-TYPES.register("any?", Builtin("any?", interpretIsAny, [Arg("arg", TypeEnum.ANY)]))
+TYPES.register("any?", Builtin("any?", interpretIsAny, [Arg("arg", TypeEnum.ANY)], return_type=Type(":bool")))
 
 def interpretIsLiteral(symbol, args, env, ns):
     return Bool(isinstance(args[0], Literal))
 
-TYPES.register("literal?", Builtin("literal?", interpretIsLiteral, [Arg("arg", TypeEnum.ANY)]))
+TYPES.register("literal?", Builtin("literal?", interpretIsLiteral, [Arg("arg", TypeEnum.ANY)], return_type=Type(":bool")))
 
 # add types to env
 any_type = NebType(":any", None, interpretIsAny)