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eval.c: raise with cause
* eval.c (rb_f_raise): add cause: optional keyword argument. [ruby-core:58610] [Feature #8257] [EXPERIMENTAL] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44473 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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3 changed files with 67 additions and 11 deletions
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@ -1,3 +1,8 @@
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Tue Dec 31 23:49:07 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
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* eval.c (rb_f_raise): add cause: optional keyword argument.
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[ruby-core:58610] [Feature #8257] [EXPERIMENTAL]
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Tue Dec 31 21:44:17 2013 Akio Tajima <artonx@yahoo.co.jp>
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* win32/Makefile.sub: remove HAVE_FSEEKO because fseeko removed from win32/win32.c
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59
eval.c
59
eval.c
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@ -20,7 +20,7 @@
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#include "vm_core.h"
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#include "probes_helper.h"
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NORETURN(void rb_raise_jump(VALUE));
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NORETURN(void rb_raise_jump(VALUE, VALUE));
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VALUE rb_eLocalJumpError;
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VALUE rb_eSysStackError;
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@ -429,7 +429,7 @@ rb_frozen_class_p(VALUE klass)
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}
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}
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NORETURN(static void rb_longjmp(int, volatile VALUE));
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NORETURN(static void rb_longjmp(int, volatile VALUE, volatile VALUE));
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static VALUE get_errinfo(void);
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static VALUE get_thread_errinfo(rb_thread_t *th);
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@ -460,21 +460,27 @@ exc_setup_cause(VALUE exc, VALUE cause)
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}
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static void
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setup_exception(rb_thread_t *th, int tag, volatile VALUE mesg)
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setup_exception(rb_thread_t *th, int tag, volatile VALUE mesg, VALUE cause)
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{
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VALUE at;
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VALUE e;
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const char *file;
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volatile int line = 0;
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int nocause = 0;
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if (NIL_P(mesg)) {
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mesg = th->errinfo;
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if (INTERNAL_EXCEPTION_P(mesg)) JUMP_TAG(TAG_FATAL);
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nocause = 1;
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}
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if (NIL_P(mesg)) {
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mesg = rb_exc_new(rb_eRuntimeError, 0, 0);
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nocause = 0;
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}
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exc_setup_cause(mesg, get_thread_errinfo(th));
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if (cause == Qundef) {
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cause = nocause ? Qnil : get_thread_errinfo(th);
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}
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exc_setup_cause(mesg, cause);
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file = rb_sourcefile();
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if (file) line = rb_sourceline();
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@ -548,10 +554,10 @@ setup_exception(rb_thread_t *th, int tag, volatile VALUE mesg)
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}
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static void
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rb_longjmp(int tag, volatile VALUE mesg)
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rb_longjmp(int tag, volatile VALUE mesg, VALUE cause)
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{
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rb_thread_t *th = GET_THREAD();
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setup_exception(th, tag, mesg);
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setup_exception(th, tag, mesg, cause);
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rb_thread_raised_clear(th);
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JUMP_TAG(tag);
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}
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@ -564,7 +570,7 @@ rb_exc_raise(VALUE mesg)
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if (!NIL_P(mesg)) {
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mesg = make_exception(1, &mesg, FALSE);
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}
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rb_longjmp(TAG_RAISE, mesg);
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rb_longjmp(TAG_RAISE, mesg, Qundef);
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}
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void
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@ -573,7 +579,7 @@ rb_exc_fatal(VALUE mesg)
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if (!NIL_P(mesg)) {
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mesg = make_exception(1, &mesg, FALSE);
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}
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rb_longjmp(TAG_FATAL, mesg);
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rb_longjmp(TAG_FATAL, mesg, Qnil);
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}
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void
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@ -582,6 +588,31 @@ rb_interrupt(void)
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rb_raise(rb_eInterrupt, "%s", "");
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}
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enum {raise_opt_cause, raise_max_opt};
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static int
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extract_raise_opts(int argc, VALUE *argv, VALUE *opts)
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{
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int i;
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if (argc > 0) {
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VALUE opt = argv[argc-1];
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if (RB_TYPE_P(opt, T_HASH)) {
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VALUE kw = rb_extract_keywords(&opt);
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if (!opt) --argc;
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if (kw) {
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ID keywords[1];
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CONST_ID(keywords[0], "cause");
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rb_get_kwargs(kw, keywords, 0, 1, opts);
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return argc;
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}
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}
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}
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for (i = 0; i < raise_max_opt; ++i) {
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opts[i] = Qundef;
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}
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return argc;
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}
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/*
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* call-seq:
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* raise
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@ -610,14 +641,20 @@ static VALUE
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rb_f_raise(int argc, VALUE *argv)
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{
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VALUE err;
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VALUE opts[raise_max_opt], *const cause = &opts[raise_opt_cause];
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argc = extract_raise_opts(argc, argv, opts);
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if (argc == 0) {
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if (*cause != Qundef) {
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rb_raise(rb_eArgError, "only cause is given with no arguments");
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}
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err = get_errinfo();
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if (!NIL_P(err)) {
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argc = 1;
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argv = &err;
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}
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}
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rb_raise_jump(rb_make_exception(argc, argv));
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rb_raise_jump(rb_make_exception(argc, argv), *cause);
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UNREACHABLE;
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}
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@ -680,7 +717,7 @@ rb_make_exception(int argc, VALUE *argv)
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}
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void
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rb_raise_jump(VALUE mesg)
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rb_raise_jump(VALUE mesg, VALUE cause)
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{
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rb_thread_t *th = GET_THREAD();
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rb_control_frame_t *cfp = th->cfp;
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@ -691,7 +728,7 @@ rb_raise_jump(VALUE mesg)
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th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
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EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, self, mid, klass, Qnil);
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setup_exception(th, TAG_RAISE, mesg);
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setup_exception(th, TAG_RAISE, mesg, cause);
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rb_thread_raised_clear(th);
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JUMP_TAG(TAG_RAISE);
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@ -517,4 +517,18 @@ end.join
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}
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assert_not_same(e, e.cause, "#{msg}: should not be recursive")
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end
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def test_raise_with_cause
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msg = "[Feature #8257]"
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cause = ArgumentError.new("foobar")
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e = assert_raise(RuntimeError) {raise msg, cause: cause}
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assert_same(cause, e.cause)
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end
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def test_cause_with_no_arguments
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cause = ArgumentError.new("foobar")
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assert_raise_with_message(ArgumentError, /with no arguments/) do
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raise cause: cause
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end
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end
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end
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