Repalace int with mrb_bool because a return value is boolean.

src/class.c

@@ -203,7 +203,7 @@ mrb_vm_define_class(mrb_state *mrb, mrb_value outer, mrb_value super, mrb_sym id
   return c;
 }
 
-int
+mrb_bool
 mrb_class_defined(mrb_state *mrb, const char *name)
 {
   mrb_value sym = mrb_check_intern_cstr(mrb, name);
@@ -1172,7 +1172,7 @@ mrb_bob_missing(mrb_state *mrb, mrb_value mod)
   return mrb_nil_value();
 }
 
-int
+mrb_bool
 mrb_obj_respond_to(struct RClass* c, mrb_sym mid)
 {
   khiter_t k;
@@ -1196,7 +1196,7 @@ mrb_obj_respond_to(struct RClass* c, mrb_sym mid)
   return FALSE;         /* no method */
 }
 
-int
+mrb_bool
 mrb_respond_to(mrb_state *mrb, mrb_value obj, mrb_sym mid)
 {
   return mrb_obj_respond_to(mrb_class(mrb, obj), mid);

src/codegen.c

@@ -683,7 +683,7 @@ scope_body(codegen_scope *s, node *tree)
   return idx - s->idx;
 }
 
-static int
+static mrb_bool
 nosplat(node *t)
 {
   while (t) {

src/kernel.c

@@ -26,7 +26,7 @@ typedef enum {
     NOEX_RESPONDS  = 0x80
 } mrb_method_flag_t;
 
-int
+mrb_bool
 mrb_obj_basic_to_s_p(mrb_state *mrb, mrb_value obj)
 {
     struct RProc *me = mrb_method_search(mrb, mrb_class(mrb, obj), mrb_intern2(mrb, "to_s", 4));
@@ -521,7 +521,7 @@ mrb_obj_instance_eval(mrb_state *mrb, mrb_value self)
   return mrb_yield_internal(mrb, b, 0, 0, self, c);
 }
 
-int
+mrb_bool
 mrb_obj_is_instance_of(mrb_state *mrb, mrb_value obj, struct RClass* c)
 {
   if (mrb_obj_class(mrb, obj) == c) return TRUE;
@@ -938,7 +938,7 @@ mrb_obj_remove_instance_variable(mrb_state *mrb, mrb_value self)
   return val;
 }
 
-static inline int
+static inline mrb_bool
 basic_obj_respond_to(mrb_state *mrb, mrb_value obj, mrb_sym id, int pub)
 {
   return mrb_respond_to(mrb, obj, id);

src/object.c

@@ -11,7 +11,7 @@
 #include "mruby/string.h"
 #include "error.h"
 
-int
+mrb_bool
 mrb_obj_eq(mrb_state *mrb, mrb_value v1, mrb_value v2)
 {
   if (mrb_type(v1) != mrb_type(v2)) return FALSE;
@@ -33,14 +33,14 @@ mrb_obj_eq(mrb_state *mrb, mrb_value v1, mrb_value v2)
   }
 }
 
-int
+mrb_bool
 mrb_obj_equal(mrb_state *mrb, mrb_value v1, mrb_value v2)
 {
   /* temporary definition */
   return mrb_obj_eq(mrb, v1, v2);
 }
 
-int
+mrb_bool
 mrb_equal(mrb_state *mrb, mrb_value obj1, mrb_value obj2)
 {
   mrb_value result;
@@ -468,7 +468,7 @@ mrb_any_to_s(mrb_state *mrb, mrb_value obj)
  *     b.kind_of? M       #=> true
  */
 
-int
+mrb_bool
 mrb_obj_is_kind_of(mrb_state *mrb, mrb_value obj, struct RClass *c)
 {
   struct RClass *cl = mrb_class(mrb, obj);
@@ -585,7 +585,7 @@ mrb_inspect(mrb_state *mrb, mrb_value obj)
   return mrb_obj_as_string(mrb, mrb_funcall(mrb, obj, "inspect", 0, 0));
 }
 
-int
+mrb_bool
 mrb_eql(mrb_state *mrb, mrb_value obj1, mrb_value obj2)
 {
   if (mrb_obj_eq(mrb, obj1, obj2)) return TRUE;

src/range.c

@@ -170,7 +170,7 @@ mrb_range_eq(mrb_state *mrb, mrb_value range)
   return mrb_true_value();
 }
 
-static int
+static mrb_bool
 r_le(mrb_state *mrb, mrb_value a, mrb_value b)
 {
   mrb_value r = mrb_funcall(mrb, a, "<=>", 1, b); /* compare result */
@@ -184,7 +184,7 @@ r_le(mrb_state *mrb, mrb_value a, mrb_value b)
   return FALSE;
 }
 
-static int
+static mrb_bool
 r_gt(mrb_state *mrb, mrb_value a, mrb_value b)
 {
   mrb_value r = mrb_funcall(mrb, a, "<=>", 1, b);
@@ -197,7 +197,7 @@ r_gt(mrb_state *mrb, mrb_value a, mrb_value b)
   return FALSE;
 }
 
-static int
+static mrb_bool
 r_ge(mrb_state *mrb, mrb_value a, mrb_value b)
 {
   mrb_value r = mrb_funcall(mrb, a, "<=>", 1, b); /* compare result */

src/string.c

@@ -595,7 +595,7 @@ mrb_str_cmp_m(mrb_state *mrb, mrb_value str1)
   return mrb_fixnum_value(result);
 }
 
-static int
+static mrb_bool
 str_eql(mrb_state *mrb, const mrb_value str1, const mrb_value str2)
 {
   const mrb_int len = RSTRING_LEN(str1);
@@ -606,7 +606,7 @@ str_eql(mrb_state *mrb, const mrb_value str1, const mrb_value str2)
   return FALSE;
 }
 
-int
+mrb_bool
 mrb_str_equal(mrb_state *mrb, mrb_value str1, mrb_value str2)
 {
   if (mrb_obj_equal(mrb, str1, str2)) return TRUE;

src/symbol.c

@@ -251,7 +251,7 @@ sym_to_sym(mrb_state *mrb, mrb_value sym)
 #endif
 #define is_identchar(c) (SIGN_EXTEND_CHAR(c)!=-1&&(ISALNUM(c) || (c) == '_'))
 
-static int
+static mrb_bool
 is_special_global_name(const char* m)
 {
   switch (*m) {
@@ -274,7 +274,7 @@ is_special_global_name(const char* m)
   return !*m;
 }
 
-static int
+static mrb_bool
 symname_p(const char *name)
 {
   const char *m = name;