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check and show a warning for incorrect yield.

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* compile.c (check_yield_place): this function check the yield location.
  * show a warning if yield in `class` syntax. [Feature #15575]

  * do strict check for toplevel `yield`. Without this patch,
    `1.times{ yield }` in toplevel is valid-syntax (raise LocalJumpError
    at runtime) although toplevel simple `yield` is not valid syntax.
    This patch make them syntax error.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66999 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
ko1 2019-02-04 07:10:05 +00:00
parent 8bda94f78c
commit 0fc597f29c
1 changed files with 19 additions and 4 deletions
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23
compile.c
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@ -5921,6 +5921,21 @@ qcall_branch_end(rb_iseq_t *iseq, LINK_ANCHOR *const ret, LABEL *else_label, VAL
ADD_LABEL(ret, end_label);
}
static int
check_yield_place(const rb_iseq_t *iseq)
{
switch (iseq->body->local_iseq->body->type) {
case ISEQ_TYPE_TOP:
case ISEQ_TYPE_MAIN:
return FALSE;
case ISEQ_TYPE_CLASS:
rb_warn("`yield' in class syntax will not be supported from Ruby 3.0. [Feature #15575]");
return TRUE;
default:
return TRUE;
}
}
static int
iseq_compile_each0(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *node, int popped)
{
@ -6827,11 +6842,11 @@ iseq_compile_each0(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *node, in
struct rb_call_info_kw_arg *keywords = NULL;
INIT_ANCHOR(args);
if (body->type == ISEQ_TYPE_TOP ||
body->type == ISEQ_TYPE_MAIN) {
if (check_yield_place(iseq) == FALSE) {
COMPILE_ERROR(ERROR_ARGS "Invalid yield");
goto ng;
}
goto ng;
}
if (node->nd_head) {
argc = setup_args(iseq, args, node->nd_head, &flag, &keywords);