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[EXPERIMENTAL] Expression with modifier in

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[Feature #15865]
This commit is contained in:
Nobuyoshi Nakada 2019-05-21 10:29:34 +09:00
parent 1fe73dc860
commit 3cee99808d
Notes: git 2019-09-26 15:11:14 +09:00 
Merged: https://github.com/ruby/ruby/pull/2485
3 changed files with 26 additions and 3 deletions
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20
parse.y
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@ -1127,7 +1127,7 @@ static void token_info_warn(struct parser_params *p, const char *token, token_in
%nonassoc tLOWEST
%nonassoc tLBRACE_ARG
%nonassoc modifier_if modifier_unless modifier_while modifier_until
%nonassoc modifier_if modifier_unless modifier_while modifier_until keyword_in
%left keyword_or keyword_and
%right keyword_not
%nonassoc keyword_defined
@ -1537,7 +1537,23 @@ expr : command_call
{
$$ = call_uni_op(p, method_cond(p, $2, &@2), '!', &@1, &@$);
}
| arg
| arg keyword_in
{
SET_LEX_STATE(EXPR_BEG|EXPR_LABEL);
p->command_start = FALSE;
$<num>$ = p->in_kwarg;
p->in_kwarg = 1;
}
p_top_expr_body
{
p->in_kwarg = !!$<num>2;
/*%%%*/
$$ = NEW_CASE3($1, NEW_IN($4, NEW_TRUE(&@4), NEW_FALSE(&@4), &@4), &@$);
rb_warn0L(nd_line($$), "Pattern matching is experimental, and the behavior may change in future versions of Ruby!");
/*% %*/
/*% ripper: case!($1, in!($4, Qnil, Qnil)) %*/
}
| arg %prec tLBRACE_ARG
;
expr_value : expr

2
test/ruby/test_iseq.rb
View file

@ -434,7 +434,7 @@ class TestISeq < Test::Unit::TestCase
end
def test_to_binary_pattern_matching
code = "case foo in []; end"
code = "case foo; in []; end"
iseq = compile(code)
assert_include(iseq.disasm, "TypeError")
assert_include(iseq.disasm, "NoMatchingPatternError")

7
test/ruby/test_pattern_matching.rb
View file

@ -1180,6 +1180,13 @@ END
end
end
end
################################################################
def test_modifier_in
assert_equal true, (1 in a)
assert_equal 1, a
end
end
END_of_GUARD
$VERBOSE = verbose