Merge pull request #2204 from take-cheeze/kernel_fail

Implement Kernel.fail and Kernel#fail .

include/mruby/error.h

@@ -21,6 +21,9 @@ void mrb_print_backtrace(mrb_state *mrb);
 mrb_value mrb_exc_backtrace(mrb_state *mrb, mrb_value exc);
 mrb_value mrb_get_backtrace(mrb_state *mrb);
 
+/* declaration for fail method */
+mrb_value mrb_f_raise(mrb_state*, mrb_value);
+
 #if defined(__cplusplus)
 }  /* extern "C" { */
 #endif

mrbgems/default.gembox

@@ -64,4 +64,7 @@ MRuby::GemBox.new do |conf|
 
   # Generate mruby command
   conf.gem :core => "mruby-bin-mruby"
+
+  # Use extensional Kernel module
+  conf.gem :core => "mruby-kernel-ext"
 end

mrbgems/mruby-kernel-ext/mrbgem.rake

+MRuby::Gem::Specification.new('mruby-kernel-ext') do |spec|
+  spec.license = 'MIT'
+  spec.author  = 'mruby developers'
+  spec.summary = 'extensional Kernel module'
+end

mrbgems/mruby-kernel-ext/src/kernel.c

+#include <mruby.h>
+#include <mruby/error.h>
+
+void
+mrb_mruby_kernel_ext_gem_init(mrb_state *mrb)
+{
+  struct RClass *krn = mrb->kernel_module;
+
+  mrb_define_module_function(mrb, krn, "fail", mrb_f_raise, MRB_ARGS_NONE());
+}
+
+void
+mrb_mruby_kernel_ext_gem_final(mrb_state *mrb)
+{
+}

mrbgems/mruby-kernel-ext/test/kernel.rb

+assert('Kernel.fail, Kernel#fail') do
+  assert_raise(RuntimeError) { fail }
+  assert_raise(RuntimeError) { Kernel.fail }
+end

src/kernel.c

@@ -924,7 +924,7 @@ mrb_obj_public_methods(mrb_state *mrb, mrb_value self)
  *     raise "Failed to create socket"
  *     raise ArgumentError, "No parameters", caller
  */
-static mrb_value
+mrb_value
 mrb_f_raise(mrb_state *mrb, mrb_value self)
 {
   mrb_value a[2], exc;