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Implement keyword argument to last positional hash emulation

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For methods that accept keyword arguments but do not accept a
keyword splat, if a keyword splat is passed, or keywords are
used with a non-symbol key, check the hash.  If the hash contains
all symbols, keep the same behavior as before.  If the hash
contains all non-symbols, move the hash to the last positional
hash and warn. If the hash contains symbols and non-Symbols, split
the hash and use the symbol keys for the keyword hash and non-symbol
keys for the positional hash and warn.
This commit is contained in:
Jeremy Evans 2019-08-17 22:43:26 -07:00
parent 8399609e5a
commit 5c507db467
Notes: git 2019-08-31 04:40:14 +09:00 
Merged: https://github.com/ruby/ruby/pull/2395
1 changed files with 27 additions and 1 deletions
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28
vm_args.c
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@ -584,6 +584,20 @@ get_loc(struct rb_calling_info *calling, const struct rb_call_info *ci)
return rb_obj_method_location(calling->recv, ci->mid);
}
static inline void
rb_warn_keyword_to_last_hash(struct rb_calling_info *calling, const struct rb_call_info *ci)
{
if (calling->recv == Qundef) return;
VALUE loc = get_loc(calling, ci);
if (NIL_P(loc)) {
rb_warn("The keyword argument for `%s' is passed as the last hash parameter", rb_id2name(ci->mid));
}
else {
rb_warn("The keyword argument for `%s' (defined at %s:%d) is passed as the last hash parameter",
rb_id2name(ci->mid), RSTRING_PTR(RARRAY_AREF(loc, 0)), FIX2INT(RARRAY_AREF(loc, 1)));
}
}
static inline void
rb_warn_split_last_hash_to_keyword(struct rb_calling_info *calling, const struct rb_call_info *ci)
{
@ -746,9 +760,21 @@ setup_parameters_complex(rb_execution_context_t * const ec, const rb_iseq_t * co
(kw_splat && given_argc > max_argc)) &&
args->kw_argv == NULL) {
if (((kw_flag & (VM_CALL_KWARG | VM_CALL_KW_SPLAT)) || !ec->cfp->iseq /* called from C */)) {
if (args_pop_keyword_hash(args, &keyword_hash, 0)) {
int check_only_symbol = (kw_flag & VM_CALL_KW_SPLAT) &&
iseq->body->param.flags.has_kw &&
!iseq->body->param.flags.has_kwrest;
if (args_pop_keyword_hash(args, &keyword_hash, check_only_symbol)) {
given_argc--;
}
else if (check_only_symbol) {
if (keyword_hash != Qnil) {
rb_warn_split_last_hash_to_keyword(calling, ci);
}
else {
rb_warn_keyword_to_last_hash(calling, ci);
}
}
}
else if (args_pop_keyword_hash(args, &keyword_hash, 1)) {
/* Warn the following: