replace _cstr by _lit for litral C strings; ref #3300

include/mruby.h

@@ -430,7 +430,7 @@ MRB_API void mrb_define_const(mrb_state*, struct RClass*, const char *name, mrb_
  *
  *     mrb_value
  *     mrb_example_method(mrb_state *mrb){
- *       return mrb_str_new_cstr(mrb, "example");
+ *       return mrb_str_new_lit(mrb, "example");
  *     }
  *
  *     void
@@ -473,7 +473,7 @@ MRB_API void mrb_undef_method(mrb_state*, struct RClass*, const char*);
  *
  *     mrb_value
  *     mrb_example_method(mrb_state *mrb){
- *       return mrb_str_new_cstr(mrb, "example");
+ *       return mrb_str_new_lit(mrb, "example");
  *     }
  *
  *     void
@@ -696,7 +696,7 @@ MRB_API mrb_value mrb_check_to_integer(mrb_state *mrb, mrb_value val, const char
  *
  *        example_class = mrb_define_class(mrb, "ExampleClass", mrb->object_class);
  *        mrb_define_method(mrb, example_class, "example_method", exampleMethod, MRB_ARGS_NONE());
- *        mid = mrb_intern_str(mrb, mrb_str_new_cstr(mrb, "example_method" ));
+ *        mid = mrb_intern_str(mrb, mrb_str_new_lit(mrb, "example_method" ));
  *        obj_resp = mrb_obj_respond_to(mrb, example_class, mid); // => 1(true in Ruby world)
  *
  *        // If mrb_obj_respond_to returns 1 then puts "True"
@@ -884,7 +884,7 @@ MRB_API mrb_value mrb_funcall(mrb_state*, mrb_value, const char*, mrb_int,...);
  *        mrb_state *mrb = mrb_open();
  *
  *        if (!mrb) { }
- *        mrb_sym m_sym = mrb_intern_cstr(mrb, "method_name"); // Symbol for method.
+ *        mrb_sym m_sym = mrb_intern_lit(mrb, "method_name"); // Symbol for method.
  *
  *        FILE *fp = fopen("test.rb","r");
  *        mrb_value obj = mrb_load_file(mrb,fp);
@@ -912,7 +912,7 @@ MRB_API mrb_value mrb_funcall_with_block(mrb_state*, mrb_value, mrb_sym, mrb_int
  *     :pizza # => :pizza
  *
  *     // C style:
- *     mrb_sym m_sym = mrb_intern_cstr(mrb, "pizza"); //  => :pizza
+ *     mrb_sym m_sym = mrb_intern_lit(mrb, "pizza"); //  => :pizza
  * @param [mrb_state*] mrb_state* The current mruby state.
  * @param [const char*] const char* The name of the method.
  * @return [mrb_sym] mrb_sym A symbol.

include/mruby/string.h

@@ -110,8 +110,8 @@ MRB_API void mrb_str_modify(mrb_state*, struct RString*);
  *       }
  *
  *       // Creates new Ruby strings.
- *       str1 = mrb_str_new_cstr(mrb, "abc");
- *       str2 = mrb_str_new_cstr(mrb, "def");
+ *       str1 = mrb_str_new_lit(mrb, "abc");
+ *       str2 = mrb_str_new_lit(mrb, "def");
  *
  *       // Concatnates str2 to str1.
  *       mrb_str_concat(mrb, str1, str2);
@@ -158,8 +158,8 @@ MRB_API void mrb_str_concat(mrb_state*, mrb_value, mrb_value);
  *       }
  *
  *       // Creates two Ruby strings from the passed in C strings.
- *       a = mrb_str_new_cstr(mrb, "abc");
- *       b = mrb_str_new_cstr(mrb, "def");
+ *       a = mrb_str_new_lit(mrb, "abc");
+ *       b = mrb_str_new_lit(mrb, "def");
  *
  *       // Prints both C strings.
  *       mrb_p(mrb, a);
@@ -227,7 +227,7 @@ MRB_API mrb_value mrb_obj_as_string(mrb_state *mrb, mrb_value obj);
  *            // handle error
  *         }
  *         // Creates a new string.
- *         str = mrb_str_new_cstr(mrb, "Hello, world!");
+ *         str = mrb_str_new_lit(mrb, "Hello, world!");
  *         // Returns 5 characters of
  *         mrb_str_resize(mrb, str, 5);
  *         mrb_p(mrb, str);
@@ -267,7 +267,7 @@ MRB_API mrb_value mrb_str_resize(mrb_state *mrb, mrb_value str, mrb_int len);
  *         // handle error
  *       }
  *       // Creates new string.
- *       str1 = mrb_str_new_cstr(mrb, "Hello, world!");
+ *       str1 = mrb_str_new_lit(mrb, "Hello, world!");
  *       // Returns a sub-string within the range of 0..2
  *       str2 = mrb_str_substr(mrb, str1, 0, 2);
  *

include/mruby/variable.h

@@ -66,7 +66,7 @@ MRB_API mrb_bool mrb_const_defined_at(mrb_state *mrb, mrb_value mod, mrb_sym id)
  *
  *     !!!c
  *     // C style
- *     mrb_sym sym = mrb_intern_cstr(mrb, "$value");
+ *     mrb_sym sym = mrb_intern_lit(mrb, "$value");
  *     mrb_value var = mrb_gv_get(mrb, sym);
  *
  * @param mrb The mruby state reference
@@ -86,8 +86,8 @@ MRB_API mrb_value mrb_gv_get(mrb_state *mrb, mrb_sym sym);
  *
  *     !!!c
  *     // C style
- *     mrb_sym sym = mrb_intern_cstr(mrb, "$value");
- *     mrb_gv_set(mrb, sym, mrb_str_new_cstr("foo"));
+ *     mrb_sym sym = mrb_intern_lit(mrb, "$value");
+ *     mrb_gv_set(mrb, sym, mrb_str_new_lit("foo"));
  *
  * @param mrb The mruby state reference
  * @param sym The name of the global variable
@@ -106,7 +106,7 @@ MRB_API void mrb_gv_set(mrb_state *mrb, mrb_sym sym, mrb_value val);
  *
  *     !!!c
  *     // C style
- *     mrb_sym sym = mrb_intern_cstr(mrb, "$value");
+ *     mrb_sym sym = mrb_intern_lit(mrb, "$value");
  *     mrb_gv_remove(mrb, sym);
  *
  * @param mrb The mruby state reference