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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
This commit is contained in:
nobu 2013-12-31 14:49:16 +00:00
parent 2cdee22370
commit 8a46d4027c
3 changed files with 67 additions and 11 deletions

View file

@ -1,3 +1,8 @@
Tue Dec 31 23:49:07 2013 Nobuyoshi Nakada <nobu@ruby-lang.org>
* eval.c (rb_f_raise): add cause: optional keyword argument.
[ruby-core:58610] [Feature #8257] [EXPERIMENTAL]
Tue Dec 31 21:44:17 2013 Akio Tajima <artonx@yahoo.co.jp>
* win32/Makefile.sub: remove HAVE_FSEEKO because fseeko removed from win32/win32.c

59
eval.c
View file

@ -20,7 +20,7 @@
#include "vm_core.h"
#include "probes_helper.h"
NORETURN(void rb_raise_jump(VALUE));
NORETURN(void rb_raise_jump(VALUE, VALUE));
VALUE rb_eLocalJumpError;
VALUE rb_eSysStackError;
@ -429,7 +429,7 @@ rb_frozen_class_p(VALUE klass)
}
}
NORETURN(static void rb_longjmp(int, volatile VALUE));
NORETURN(static void rb_longjmp(int, volatile VALUE, volatile VALUE));
static VALUE get_errinfo(void);
static VALUE get_thread_errinfo(rb_thread_t *th);
@ -460,21 +460,27 @@ exc_setup_cause(VALUE exc, VALUE cause)
}
static void
setup_exception(rb_thread_t *th, int tag, volatile VALUE mesg)
setup_exception(rb_thread_t *th, int tag, volatile VALUE mesg, VALUE cause)
{
VALUE at;
VALUE e;
const char *file;
volatile int line = 0;
int nocause = 0;
if (NIL_P(mesg)) {
mesg = th->errinfo;
if (INTERNAL_EXCEPTION_P(mesg)) JUMP_TAG(TAG_FATAL);
nocause = 1;
}
if (NIL_P(mesg)) {
mesg = rb_exc_new(rb_eRuntimeError, 0, 0);
nocause = 0;
}
exc_setup_cause(mesg, get_thread_errinfo(th));
if (cause == Qundef) {
cause = nocause ? Qnil : get_thread_errinfo(th);
}
exc_setup_cause(mesg, cause);
file = rb_sourcefile();
if (file) line = rb_sourceline();
@ -548,10 +554,10 @@ setup_exception(rb_thread_t *th, int tag, volatile VALUE mesg)
}
static void
rb_longjmp(int tag, volatile VALUE mesg)
rb_longjmp(int tag, volatile VALUE mesg, VALUE cause)
{
rb_thread_t *th = GET_THREAD();
setup_exception(th, tag, mesg);
setup_exception(th, tag, mesg, cause);
rb_thread_raised_clear(th);
JUMP_TAG(tag);
}
@ -564,7 +570,7 @@ rb_exc_raise(VALUE mesg)
if (!NIL_P(mesg)) {
mesg = make_exception(1, &mesg, FALSE);
}
rb_longjmp(TAG_RAISE, mesg);
rb_longjmp(TAG_RAISE, mesg, Qundef);
}
void
@ -573,7 +579,7 @@ rb_exc_fatal(VALUE mesg)
if (!NIL_P(mesg)) {
mesg = make_exception(1, &mesg, FALSE);
}
rb_longjmp(TAG_FATAL, mesg);
rb_longjmp(TAG_FATAL, mesg, Qnil);
}
void
@ -582,6 +588,31 @@ rb_interrupt(void)
rb_raise(rb_eInterrupt, "%s", "");
}
enum {raise_opt_cause, raise_max_opt};
static int
extract_raise_opts(int argc, VALUE *argv, VALUE *opts)
{
int i;
if (argc > 0) {
VALUE opt = argv[argc-1];
if (RB_TYPE_P(opt, T_HASH)) {
VALUE kw = rb_extract_keywords(&opt);
if (!opt) --argc;
if (kw) {
ID keywords[1];
CONST_ID(keywords[0], "cause");
rb_get_kwargs(kw, keywords, 0, 1, opts);
return argc;
}
}
}
for (i = 0; i < raise_max_opt; ++i) {
opts[i] = Qundef;
}
return argc;
}
/*
* call-seq:
* raise
@ -610,14 +641,20 @@ static VALUE
rb_f_raise(int argc, VALUE *argv)
{
VALUE err;
VALUE opts[raise_max_opt], *const cause = &opts[raise_opt_cause];
argc = extract_raise_opts(argc, argv, opts);
if (argc == 0) {
if (*cause != Qundef) {
rb_raise(rb_eArgError, "only cause is given with no arguments");
}
err = get_errinfo();
if (!NIL_P(err)) {
argc = 1;
argv = &err;
}
}
rb_raise_jump(rb_make_exception(argc, argv));
rb_raise_jump(rb_make_exception(argc, argv), *cause);
UNREACHABLE;
}
@ -680,7 +717,7 @@ rb_make_exception(int argc, VALUE *argv)
}
void
rb_raise_jump(VALUE mesg)
rb_raise_jump(VALUE mesg, VALUE cause)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
@ -691,7 +728,7 @@ rb_raise_jump(VALUE mesg)
th->cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, self, mid, klass, Qnil);
setup_exception(th, TAG_RAISE, mesg);
setup_exception(th, TAG_RAISE, mesg, cause);
rb_thread_raised_clear(th);
JUMP_TAG(TAG_RAISE);

View file

@ -517,4 +517,18 @@ end.join
}
assert_not_same(e, e.cause, "#{msg}: should not be recursive")
end
def test_raise_with_cause
msg = "[Feature #8257]"
cause = ArgumentError.new("foobar")
e = assert_raise(RuntimeError) {raise msg, cause: cause}
assert_same(cause, e.cause)
end
def test_cause_with_no_arguments
cause = ArgumentError.new("foobar")
assert_raise_with_message(ArgumentError, /with no arguments/) do
raise cause: cause
end
end
end