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vm_args.c: warn splat to var 

* vm_args.c (setup_parameters_complex): [EXPERIMENTAL] warn when
  splat keyword arguments is passed as a single ordinary argument,
  not as a keyword rest argument.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62914 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2018-03-25 02:22:14 +00:00
parent 0de07300f0
commit a23eca2672
2 changed files with 19 additions and 4 deletions
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12
test/ruby/test_keyword.rb
View File

@ -507,6 +507,7 @@ class TestKeywordArguments < Test::Unit::TestCase
m = Object.new
def m.f() :ok; end
def m.f2(a = nil) a; end
def m.f3(**a) a; end
o = {a: 1}
assert_raise_with_message(ArgumentError, /unknown keyword: a/) {
m.f(**o)
@ -517,9 +518,16 @@ class TestKeywordArguments < Test::Unit::TestCase
assert_equal(:ok, m.f(*a, **o), '[ruby-core:83638] [Bug #10856]')
o = {a: 42}
assert_equal({a: 42}, m.f2(**o), '[ruby-core:82280] [Bug #13791]')
assert_warning(/splat keyword/) do
assert_equal({a: 42}, m.f2(**o), '[ruby-core:82280] [Bug #13791]')
end
assert_warning('') do
assert_equal({a: 42}, m.f3(**o), 'splat to kwrest')
end
assert_equal({a: 42}, m.f2("a".to_sym => 42), '[ruby-core:82291] [Bug #13793]')
assert_warning('') do
assert_equal({a: 42}, m.f2("a".to_sym => 42), '[ruby-core:82291] [Bug #13793]')
end
o = {}
a = [:ok]

11
vm_args.c
View File

@ -509,6 +509,7 @@ setup_parameters_complex(rb_execution_context_t * const ec, const rb_iseq_t * co
const int max_argc = (iseq->body->param.flags.has_rest == FALSE) ? min_argc + iseq->body->param.opt_num : UNLIMITED_ARGUMENTS;
int opt_pc = 0;
int given_argc;
int kw_splat = FALSE;
struct args_info args_body, *args;
VALUE keyword_hash = Qnil;
VALUE * const orig_sp = ec->cfp->sp;
@ -600,10 +601,12 @@ setup_parameters_complex(rb_execution_context_t * const ec, const rb_iseq_t * co
}
}
if (ci->flag & VM_CALL_KW_SPLAT) {
kw_splat = !iseq->body->param.flags.has_rest;
}
if (given_argc > min_argc &&
(iseq->body->param.flags.has_kw || iseq->body->param.flags.has_kwrest ||
(!iseq->body->param.flags.has_rest && given_argc > max_argc &&
(ci->flag & VM_CALL_KW_SPLAT))) &&
(kw_splat && given_argc > max_argc)) &&
args->kw_argv == NULL) {
if (args_pop_keyword_hash(args, &keyword_hash)) {
given_argc--;
@ -667,6 +670,10 @@ setup_parameters_complex(rb_execution_context_t * const ec, const rb_iseq_t * co
else if (!NIL_P(keyword_hash) && RHASH_SIZE(keyword_hash) > 0) {
argument_kw_error(ec, iseq, "unknown", rb_hash_keys(keyword_hash));
}
else if (kw_splat && NIL_P(keyword_hash)) {
rb_warning("passing splat keyword arguments as a single Hash"
" to `% "PRIsVALUE"'", rb_id2str(ci->mid));
}
if (iseq->body->param.flags.has_block) {
if (iseq->body->local_iseq == iseq) {