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* NEWS: Add note about frozen string literals

Browse source 
* compile.c (case_when_optimizable_literal): optimize NODE_LIT strings
  in when clauses of case statements

* ext/ripper/eventids2.c: add tSTRING_SUFFIX

* parse.y: add 'f' suffix on string literals for frozen strings

* test/ripper/test_scanner_events.rb: add scanner tests

* test/ruby/test_string.rb: add frozen string tests

[Feature #8579] [ruby-core:55699]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42773 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
charliesome 2013-09-02 07:11:41 +00:00
parent 78c75d91ae
commit a056098cb7
7 changed files with 175 additions and 9 deletions
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17
ChangeLog
View file

@ -1,3 +1,20 @@
Mon Sep 2 16:06:00 2013 Charlie Somerville <charliesome@ruby-lang.org>
* NEWS: Add note about frozen string literals
* compile.c (case_when_optimizable_literal): optimize NODE_LIT strings
in when clauses of case statements
* ext/ripper/eventids2.c: add tSTRING_SUFFIX
* parse.y: add 'f' suffix on string literals for frozen strings
* test/ripper/test_scanner_events.rb: add scanner tests
* test/ruby/test_string.rb: add frozen string tests
[Feature #8579] [ruby-core:55699]
Mon Sep 2 14:39:29 2013 Akinori MUSHA <knu@iDaemons.org>
* ruby.c (Process#setproctitle): [DOC] Fix and improve rdoc.

2
NEWS
View file

@ -24,6 +24,8 @@ with all sufficient information, see the ChangeLog file.
* def-expr now returns the symbol of its name instead of nil.
* Added 'f' suffix for string literals that returns a frozen String object.
=== Core classes updates (outstanding ones only)
* Bignum

3
compile.c
View file

@ -2504,7 +2504,8 @@ case_when_optimizable_literal(NODE * node)
modf(RFLOAT_VALUE(v), &ival) == 0.0) {
return FIXABLE(ival) ? LONG2FIX((long)ival) : rb_dbl2big(ival);
}
if (SYMBOL_P(v) || rb_obj_is_kind_of(v, rb_cNumeric)) {
if (SYMBOL_P(v) || RB_TYPE_P(v, T_STRING) ||
rb_obj_is_kind_of(v, rb_cNumeric)) {
return v;
}
break;

3
ext/ripper/eventids2.c
View file

@ -37,6 +37,7 @@ static ID ripper_id_symbeg;
static ID ripper_id_tstring_beg;
static ID ripper_id_tstring_content;
static ID ripper_id_tstring_end;
static ID ripper_id_tstring_suffix;
static ID ripper_id_words_beg;
static ID ripper_id_qwords_beg;
static ID ripper_id_qsymbols_beg;
@ -94,6 +95,7 @@ ripper_init_eventids2(void)
ripper_id_tstring_beg = rb_intern_const("on_tstring_beg");
ripper_id_tstring_content = rb_intern_const("on_tstring_content");
ripper_id_tstring_end = rb_intern_const("on_tstring_end");
ripper_id_tstring_suffix = rb_intern_const("on_tstring_suffix");
ripper_id_words_beg = rb_intern_const("on_words_beg");
ripper_id_qwords_beg = rb_intern_const("on_qwords_beg");
ripper_id_qsymbols_beg = rb_intern_const("on_qsymbols_beg");
@ -252,6 +254,7 @@ static const struct token_assoc {
{tSTRING_DEND, &ripper_id_embexpr_end},
{tSTRING_DVAR, &ripper_id_embvar},
{tSTRING_END, &ripper_id_tstring_end},
{tSTRING_SUFFIX, &ripper_id_tstring_suffix},
{tSYMBEG, &ripper_id_symbeg},
{tUMINUS, &ripper_id_op},
{tUMINUS_NUM, &ripper_id_op},

107
parse.y
View file

@ -400,6 +400,8 @@ static NODE *new_evstr_gen(struct parser_params*,NODE*);
#define new_evstr(n) new_evstr_gen(parser,(n))
static NODE *evstr2dstr_gen(struct parser_params*,NODE*);
#define evstr2dstr(n) evstr2dstr_gen(parser,(n))
static NODE *str_suffix_gen(struct parser_params*, NODE*, long);
#define str_suffix(n,o) str_suffix_gen(parser,(n),(o))
static NODE *splat_array(NODE*);
static NODE *call_bin_op_gen(struct parser_params*,NODE*,ID,NODE*);
@ -531,6 +533,9 @@ static int lvar_defined_gen(struct parser_params*, ID);
#define RE_OPTION_MASK 0xff
#define RE_OPTION_ARG_ENCODING_NONE 32
#define STR_OPTION_FROZEN 1
#define STR_OPTION_BINARY 0 /* disabled */
#define NODE_STRTERM NODE_ZARRAY /* nothing to gc */
#define NODE_HEREDOC NODE_ARRAY /* 1, 3 to gc */
#define SIGN_EXTEND(x,n) (((1<<(n)-1)^((x)&~(~0<<(n))))-(1<<(n)-1))
@ -758,7 +763,7 @@ static void token_info_pop(struct parser_params*, const char *token);
%token <id> tIDENTIFIER tFID tGVAR tIVAR tCONSTANT tCVAR tLABEL
%token <node> tINTEGER tFLOAT tRATIONAL tIMAGINARY tSTRING_CONTENT tCHAR
%token <node> tNTH_REF tBACK_REF
%token <num> tREGEXP_END
%token <num> tREGEXP_END tSTRING_SUFFIX
%type <node> singleton strings string string1 xstring regexp
%type <node> string_contents xstring_contents regexp_contents string_content
@ -784,6 +789,7 @@ static void token_info_pop(struct parser_params*, const char *token);
%type <id> fsym keyword_variable user_variable sym symbol operation operation2 operation3
%type <id> cname fname op f_rest_arg f_block_arg opt_f_block_arg f_norm_arg f_bad_arg
%type <id> f_kwrest f_label
%type <num> opt_string_sfx
/*%%%*/
/*%
%type <val> program reswords then do dot_or_colon
@ -3806,7 +3812,7 @@ literal : numeric
| dsym
;
strings : string
strings : string opt_string_sfx
{
/*%%%*/
NODE *node = $1;
@ -3816,6 +3822,7 @@ strings : string
else {
node = evstr2dstr(node);
}
node = str_suffix(node, $2);
$$ = node;
/*%
$$ = $1;
@ -3845,6 +3852,10 @@ string1 : tSTRING_BEG string_contents tSTRING_END
}
;
opt_string_sfx : tSTRING_SUFFIX
| /* none */ {$$ = 0;}
;
xstring : tXSTRING_BEG xstring_contents tSTRING_END
{
/*%%%*/
@ -5008,6 +5019,7 @@ none : /* none */
# define yylval (*((YYSTYPE*)(parser->parser_yylval)))
static int parser_regx_options(struct parser_params*);
static int parser_str_options(struct parser_params*);
static int parser_tokadd_string(struct parser_params*,int,int,int,long*,rb_encoding**);
static void parser_tokaddmbc(struct parser_params *parser, int c, rb_encoding *enc);
static int parser_parse_string(struct parser_params*,NODE*);
@ -5023,6 +5035,7 @@ static int parser_here_document(struct parser_params*,NODE*);
# define read_escape(flags,e) parser_read_escape(parser, (flags), (e))
# define tokadd_escape(e) parser_tokadd_escape(parser, (e))
# define regx_options() parser_regx_options(parser)
# define str_options() parser_str_options(parser)
# define tokadd_string(f,t,p,n,e) parser_tokadd_string(parser,(f),(t),(p),(n),(e))
# define parse_string(n) parser_parse_string(parser,(n))
# define tokaddmbc(c, enc) parser_tokaddmbc(parser, (c), (enc))
@ -5532,10 +5545,11 @@ rb_parser_compile_file_path(volatile VALUE vparser, VALUE fname, VALUE file, int
#define STR_FUNC_QWORDS 0x08
#define STR_FUNC_SYMBOL 0x10
#define STR_FUNC_INDENT 0x20
#define STR_FUNC_OPTION 0x40
enum string_type {
str_squote = (0),
str_dquote = (STR_FUNC_EXPAND),
str_squote = (STR_FUNC_OPTION),
str_dquote = (STR_FUNC_EXPAND|STR_FUNC_OPTION),
str_xquote = (STR_FUNC_EXPAND),
str_regexp = (STR_FUNC_REGEXP|STR_FUNC_ESCAPE|STR_FUNC_EXPAND),
str_sword = (STR_FUNC_QWORDS),
@ -5982,6 +5996,40 @@ parser_regx_options(struct parser_params *parser)
return options | RE_OPTION_ENCODING(kcode);
}
static int
parser_str_options(struct parser_params *parser)
{
int c, options = 0;
newtok();
while (c = nextc(), ISALPHA(c)) {
switch (c) {
#if STR_OPTION_FROZEN
case 'f':
options |= STR_OPTION_FROZEN;
break;
#endif
#if STR_OPTION_BINARY
case 'b':
options |= STR_OPTION_BINARY;
break;
#endif
default:
tokadd(c);
break;
}
}
pushback(c);
if (toklen()) {
tokfix();
compile_error(PARSER_ARG "unknown string option%s - %s",
toklen() > 1 ? "s" : "", tok());
}
return options;
}
static void
dispose_string(VALUE str)
{
@ -6248,6 +6296,10 @@ parser_parse_string(struct parser_params *parser, NODE *quote)
rb_encoding *enc = current_enc;
if (func == -1) return tSTRING_END;
if (func == 0) {
set_yylval_num(term);
return tSTRING_SUFFIX;
}
c = nextc();
if ((func & STR_FUNC_QWORDS) && ISSPACE(c)) {
do {c = nextc();} while (ISSPACE(c));
@ -6256,11 +6308,18 @@ parser_parse_string(struct parser_params *parser, NODE *quote)
if (c == term && !quote->nd_nest) {
if (func & STR_FUNC_QWORDS) {
quote->nd_func = -1;
quote->u2.id = 0;
return ' ';
}
if (!(func & STR_FUNC_REGEXP)) return tSTRING_END;
set_yylval_num(regx_options());
return tREGEXP_END;
if (func & STR_FUNC_REGEXP) {
set_yylval_num(regx_options());
return tREGEXP_END;
}
if ((func & STR_FUNC_OPTION) && (func = str_options()) != 0) {
quote->nd_func = 0;
quote->u2.id = func;
}
return tSTRING_END;
}
if (space) {
pushback(c);
@ -6948,7 +7007,8 @@ parser_yylex(struct parser_params *parser)
}
else {
token = parse_string(lex_strterm);
if (token == tSTRING_END || token == tREGEXP_END) {
if ((token == tSTRING_END && lex_strterm->nd_func) ||
token == tSTRING_SUFFIX || token == tREGEXP_END) {
rb_gc_force_recycle((VALUE)lex_strterm);
lex_strterm = 0;
lex_state = EXPR_END;
@ -8497,6 +8557,37 @@ evstr2dstr_gen(struct parser_params *parser, NODE *node)
return node;
}
static NODE *
str_suffix_gen(struct parser_params *parser, NODE *node, long opt)
{
if (nd_type(node) == NODE_STR) {
#if STR_OPTION_BINARY
if (opt & STR_OPTION_BINARY) {
rb_enc_associate_index(node->nd_lit, ENCINDEX_ASCII);
}
#endif
#if STR_OPTION_FROZEN
if (opt & STR_OPTION_FROZEN) {
OBJ_FREEZE(node->nd_lit);
nd_set_type(node, NODE_LIT);
}
#endif
}
else {
#if STR_OPTION_BINARY
if (opt & STR_OPTION_BINARY) {
node = NEW_CALL(node, rb_intern("b"), 0);
}
#endif
#if STR_OPTION_FROZEN
if (opt & STR_OPTION_FROZEN) {
node = NEW_CALL(node, rb_intern("freeze"), 0);
}
#endif
}
return node;
}
static NODE *
new_evstr_gen(struct parser_params *parser, NODE *node)
{

9
test/ripper/test_scanner_events.rb
View file

@ -591,6 +591,15 @@ class TestRipper::ScannerEvents < Test::Unit::TestCase
scan('tstring_end', '%Q[abcdef]')
end
def test_tstring_suffix
assert_equal ['"f'],
scan('tstring_end', '"abcdef"f')
assert_equal [']f'],
scan('tstring_end', '%q[abcdef]f')
assert_equal [']f'],
scan('tstring_end', '%Q[abcdef]f')
end
def test_regexp_beg
assert_equal [],
scan('regexp_beg', '')

43
test/ruby/test_string.rb
View file

@ -2192,6 +2192,49 @@ class TestString < Test::Unit::TestCase
assert_equal(false, "\u3042".byteslice(0, 2).valid_encoding?)
assert_equal(false, ("\u3042"*10).byteslice(0, 20).valid_encoding?)
end
def test_unknown_string_option
assert_raises(SyntaxError) do
eval(%{
"hello"x
})
end
end
def test_frozen_string
assert_equal "hello", "hello"f
assert_predicate "hello"f, :frozen?
f = -> { "hello"f }
assert_equal f.call.object_id, f.call.object_id
end
def test_frozen_dstring
assert_equal "hello123", "hello#{123}"f
assert_predicate "hello#{123}"f, :frozen?
i = 0
f = -> { "#{i += 1}"f }
assert_equal "1", f.call
assert_equal "2", f.call
end
def test_frozen_string_cannot_be_adjacent
assert_raises(SyntaxError) do
eval(%{
"hello"f "world"
})
end
assert_raises(SyntaxError) do
eval(%{
"hello"f "world"
})
end
end
end
class TestString2 < TestString