Commit Graph

344 Commits

Author SHA1 Message Date
Brian Anderson
9dc6938292 Merge remote-tracking branch 'nickdesaulniers/issue4524' into nocomm1 2013-02-01 11:18:58 -08:00
Nick Desaulniers
7868b6bf55 Remove fail keyword from lexer & parser and clean up remaining calls to
fail

Fix merge conflicts - Issue 4524
2013-02-01 00:15:42 -08:00
John Clements
53688addaa test cases, cleanup 2013-01-31 23:05:12 -08:00
Nick Desaulniers
aee7929469 Replace most invocations of fail keyword with die! macro 2013-01-31 20:12:49 -08:00
Niko Matsakis
71478f9ce3 Workaround for #4717: pad contents of ast. rs=breakage 2013-01-31 16:56:12 -08:00
Niko Matsakis
0682ad0eb9 Finalize moves-based-on-type implementation.
Changes:

- Refactor move mode computation
- Removes move mode arguments, unary move, capture clauses
  (though they still parse for backwards compatibility)
- Simplify how moves are handled in trans
- Fix a number of illegal copies that cropped up
- Workaround for bug involving def-ids in params
  (see details below)

Future work (I'll open bugs for these...):

- Improve error messages for moves that are due
  to bindings
- Add support for moving owned content like a.b.c
  to borrow check, test in trans (but I think it'll
  "just work")
- Proper fix for def-ids in params

Def ids in params:

Move captures into a map instead of recomputing.

This is a workaround for a larger bug having to do with the def-ids associated
with ty_params, which are not always properly preserved when inlining.  I am
not sure of my preferred fix for the larger bug yet.  This current fix removes
the only code in trans that I know of which relies on ty_param def-ids, but
feels fragile.
2013-01-31 12:09:00 -08:00
Ben Striegel
13076eb3b0 Fix RIMOV damage to libsyntax 2013-01-30 23:21:16 -05:00
Ben Striegel
0336a8633f RIMOV, round 10
find ./ -type f -name "*.rs" -exec sed -i "s/~\[mut /~\[/g" {} \;
2013-01-30 23:19:08 -05:00
Ben Striegel
3e95a13577 RIMOV, round 8
find ./ -type f -name "*.rs" -exec sed -i "s/  \([a-zA-Z_]\+\): ~\[mut /
mut \1: ~\[/g" {} \;
2013-01-30 23:19:08 -05:00
Ben Striegel
b4f47eca2a RIMOV, round 7
find ./ -type f -name "*.rs" -exec sed -i "s/ mut \([a-zA-Z_]\+\):
~\[mut / mut \1: ~\[/g" {} \;
2013-01-30 23:18:08 -05:00
Ben Striegel
5577ce635f RIMOV, round 3
find ./ -type f -name "*.rs" -exec sed -i "s/let \(.*\)\[mut[ ]\?/let
mut \1\[/g" {} \;
2013-01-30 23:16:56 -05:00
Patrick Walton
49472ec4c9 librustc: Remove legacy exports from the language. r=brson 2013-01-30 18:11:43 -08:00
Patrick Walton
b070590564 libsyntax: De-export libsyntax. rs=deexporting 2013-01-29 14:42:23 -08:00
Patrick Walton
95b892c8a7 libsyntax: De-export a lot of libsyntax. rs=deëxporting 2013-01-29 13:55:30 -08:00
Tim Chevalier
91676f3fa6 syntax: Don't add an extra space before the last comma...
...when printing struct update expressions.
2013-01-28 19:41:56 -08:00
Daniel Micay
d95c9cbe38 replace ConstVector trait with the Container trait 2013-01-24 23:02:44 -05:00
John Clements
cb504f5404 unit test cases now pass, added a few to the interner 2013-01-24 14:20:57 -08:00
John Clements
8716005581 cleaning up, adding tests 2013-01-23 17:31:12 -08:00
Patrick Walton
778aec998b libsyntax: Implement the + syntax for multiple trait bounds. r=tjc 2013-01-23 11:15:10 -08:00
Tim Chevalier
995ccc0d82 Merge pull request #4596 from Trinick/tomutrename
core: Rename to_mut and from_mut to cast_to_mut and cast_from_mut
2013-01-23 10:56:08 -08:00
Trinick
9dc8e96c5f core: Rename to_mut and from_mut to cast_to_mut and cast_from_mut 2013-01-23 10:09:45 +00:00
Tim Chevalier
83ddb55e8f syntax: Pretty-print mut qualifiers on args 2013-01-22 23:34:35 -08:00
Patrick Walton
2a1b6c4de9 librustc: Implement &static as the replacement for Durable. r=nmatsakis 2013-01-10 11:16:54 -08:00
Niko Matsakis
2b92962aa2 A collection of refactorings that I found it hard/tiresome to divide:
- Make `extern fn()` assignable to any closure type, rather than
  a subtype.
- Remove unused int_ty_set and float_ty_set
- Refactor variable unification and make it more DRY
- Do fn sub/lub/glb on the level of fn_sig
- Rename infer::to_str::ToStr to infer::to_str::InferStr
- Capitalize names of various types
- Correct hashing of FnMeta
- Convert various records-of-fns into structs-of-fns.  This is both
  eliminating use of deprecated features and more forwards compatible
  with fn reform.

r=pcwalton
2013-01-09 14:59:07 -08:00
Erick Tryzelaar
93c2ebf994 syntax: convert ast::spanned into a struct 2013-01-09 08:55:36 -08:00
Patrick Walton
2db3abddcd librustc: Make unqualified identifier searches terminate at the nearest module scope. r=tjc 2013-01-08 22:02:35 -08:00
Patrick Walton
44ab00ee37 Revert "librustc: Make unqualified identifier searches terminate at the nearest module scope. r=tjc"
This reverts commit a8d37af247.
2013-01-08 19:29:16 -08:00
Patrick Walton
a8d37af247 librustc: Make unqualified identifier searches terminate at the nearest module scope. r=tjc 2013-01-08 19:27:57 -08:00
Lindsey Kuper
816cb8c535 Rename identifiers that still use 'alt' to use 'match'
This'll be less confusing for anyone who works on match in future.
2013-01-08 14:31:58 -05:00
Patrick Walton
57c599914a librustc: Terminate name searches at the nearest module scope for paths that contain at least two components. r=graydon 2012-12-27 10:02:54 -08:00
Jakub Wieczorek
1968cb315a Add support for destructuring vectors in match expressions 2012-12-17 16:50:40 -08:00
Patrick Walton
4c2e4c37ce librustc: Make use statements crate-relative by default. r=brson 2012-12-13 13:05:22 -08:00
Graydon Hoare
9a4c669867 syntax: remove remaining #syntaxext machinery. Close #3516. 2012-12-12 17:08:09 -08:00
Graydon Hoare
e24ae85025 syntax: remove most code handling old-style syntax extensions. 2012-12-12 15:02:47 -08:00
Tim Chevalier
0046ed9462 Remove un-needed code for obsolete classes
and rename "class" to "struct" everywhere possible (except local
vars, I was too lazy for that) -- that is why this commit is so
big.

No review, just dead code removal and renaming.

Closes #3515
2012-12-10 18:45:01 -08:00
Patrick Walton
98fdcb0b9d librustc: De-mode pattern bindings. r=nmatsakis 2012-12-07 19:34:57 -08:00
Patrick Walton
ab3b752906 librustc: Implement "&mut [T]" as an expression. r=brson 2012-12-07 18:29:10 -08:00
Brian Anderson
87f3ea7705 Fix pretty-printing of trait constraints 2012-12-07 17:55:34 -08:00
Graydon Hoare
d78053ecb0 syntax: try to fix pattern printing yet again, r=burningtree. 2012-12-07 14:39:47 -08:00
Graydon Hoare
28cce241dc syntax: try to fix pattern printing harder, r=burningtree. 2012-12-07 12:52:01 -08:00
Graydon Hoare
5bdbfa41e6 syntax: pretty print bind_by_value patterns as "copy", r=burningtree. 2012-12-07 12:29:46 -08:00
Graydon Hoare
65db4315ab syntax: fix a pp bug on foreign mods. 2012-12-07 11:21:14 -08:00
Tim Chevalier
58a4a3700d Revert "Print copy patterns correctly"
This reverts commit ea6819637382e7f8979766b954dd2a1922d0dee0.
2012-12-06 22:36:32 -08:00
Tim Chevalier
f070e22360 Print copy patterns correctly 2012-12-06 21:53:25 -08:00
Patrick Walton
1282fc8074 librustc: Hook borrow check loan checking up to the moves-based-on-type infrastructure. rs=helps-unbreak-the-build 2012-12-05 15:07:48 -08:00
Patrick Walton
b8cfd5c414 librustc: Long lines. rs=rustbot 2012-12-04 21:13:02 -08:00
Patrick Walton
56ece46f7d librustc: Remove all legacy pattern bindings from libsyntax and librustc. rs=refactoring 2012-12-04 14:19:19 -08:00
Graydon Hoare
00c856c0b1 Update license, add license boilerplate to most files. Remainder will follow. 2012-12-03 17:12:14 -08:00
Patrick Walton
f34833abfc librustc: Make a.b() always a method call. r=nmatsakis 2012-11-30 20:41:46 -08:00
Patrick Walton
a0617eae68 librustc: Eliminate most expressions of the form a.b() that are not method calls. rs=refactoring 2012-11-29 17:51:56 -08:00
Paul Stansifer
0f707f42c8 Distinguish stmt_macs that are followed by semicolons and those that aren't. 2012-11-29 12:09:10 -08:00
Paul Stansifer
ee076f63f9 Allow for macros to occur in statement position. 2012-11-29 12:09:10 -08:00
Brian Anderson
fc06114ddf Merge remote-tracking branch 'brson/companion' into incoming
Conflicts:
	src/compiletest/compiletest.rs
	src/libcargo/cargo.rs
	src/libcore/core.rs
	src/librustc/rustc.rs
	src/librustdoc/rustdoc.rc
2012-11-28 13:17:33 -08:00
Brian Anderson
8179e268ef Register snapshots 2012-11-28 12:33:00 -08:00
Patrick Walton
61cfec3c52 librustc: Parse extern "C" { ... }. r=brson 2012-11-28 11:28:16 -08:00
Patrick Walton
1c348e6e38 librustc: Implement @mut [T] as the new replacement for @[mut T] 2012-11-27 09:23:31 -08:00
Patrick Walton
318e534895 rustc: Implement explicit self for Eq and Ord. r=graydon 2012-11-19 15:33:11 -08:00
Brian Anderson
1a1e99c27d Merge remote-tracking branch 'brson/codemap'
Conflicts:
	src/libsyntax/ext/source_util.rs
2012-11-17 18:38:39 -08:00
Brian Anderson
81d20156cd Change spans to use byte offsets instead of char offsets 2012-11-16 12:06:44 -08:00
Brian Anderson
f67bfe9738 Add types for character position and byte position in the codemap 2012-11-14 15:18:29 -08:00
Patrick Walton
32ad4ae4cd librustc: Require the #[derivable] attribute, remove the significance of "impl Foo : Bar;", and allow only a subset of methods in a trait to be derived. r=brson 2012-11-14 11:36:55 -08:00
Graydon Hoare
ac0fd0ddc9 rustc: fix pp build breakage. 2012-11-13 10:54:10 -08:00
Brian Anderson
2ec09c4eb9 Objectify the codemap 2012-11-12 18:24:56 -08:00
Brian Anderson
5b248a6ca8 Remove CodeMap box typedef from codemap 2012-11-12 17:09:52 -08:00
Patrick Walton
fe02814a63 rustc: Implement floating point literal inference. r=nmatsakis 2012-11-12 10:39:08 -08:00
Patrick Walton
0fc952372a rustc: Support irrefutable patterns in function arguments. r=nmatsakis 2012-11-07 19:29:30 -08:00
Niko Matsakis
b0ed151539 Cleanup how we handle proto in types, remove unsound subtyping
Fixes #1896 which was never truly fixed, just masked.
The given tests would have failed had they used `~fn()` and
not `@fn()`.  They now result in compilation errors.

Fixes #2978.

Necessary first step for #2202, #2263.
2012-11-06 08:56:29 -08:00
Patrick Walton
be93b29d30 rustc: Implement parsing and typechecking for "once fn" 2012-11-05 13:17:02 -08:00
Tim Chevalier
62f98c8ff8 Preserve parenthesization in the AST
Maintain explicit "paren" nodes in the AST so we can pretty-print
without having to guess where parens should go. We may revisit this
in the future.

r=graydon
2012-10-30 15:05:32 -07:00
Patrick Walton
c7ec183b34 libsyntax: Fix pretty printing of tuple structs. Attempt to put out fire. rs=rustbot 2012-10-26 12:11:40 -07:00
Tim Chevalier
087cbb55d0 Remove <- operator from the compiler
Yield an obsolete syntax error on things like "let foo <- bar;"
and "foo <- bar;" r=brson

Progress on #3466
2012-10-23 12:10:19 -07:00
Patrick Walton
3bf0a9b094 rustc: Implement typechecking for simple monomorphic derivable traits on monomorphic types. r=brson 2012-10-23 10:45:23 -07:00
Tim Chevalier
dd66e7549b Preliminary support for labeled break/continue for loops
This patch adds preliminary middle-end support (liveness and trans)
for breaks and `loop`s to `loop` constructs that have labels.

while and for loops can't have labels yet.

Progress on #2216
2012-10-22 09:20:37 -07:00
Tim Chevalier
46d4bbbae4 Simplify the AST representation of ty param bounds
Change ast::ty_param_bound so that all ty param bounds are represented
as traits, with no special cases for Copy/Send/Owned/Const.
typeck::collect generates the special cases.

A consequence of this is that code using the #[no_core] attribute
can't use the Copy kind/trait. Probably not a big deal?

As a side effect, any user-defined traits that happen to be called
Copy, etc. in the same module override the built-in Copy trait.

r=nmatsakis

Closes #2284
2012-10-22 09:01:12 -07:00
Philipp Brüschweiler
4174688dd4 libsyntax: adapt the pretty printer for the new fixed size array syntax
`[int]/5` -> `[int * 5]`
2012-10-20 17:50:46 -07:00
Tim Chevalier
b532a8e585 Line length 2012-10-17 12:03:18 -07:00
Tim Chevalier
7236472e67 word => word_space 2012-10-17 12:03:18 -07:00
Jyun-Yan You
66151d02f5 remove duplicate visibility and fix indentation 2012-10-17 12:03:18 -07:00
Jyun-Yan You
ca5506a5de fix the indentation of foreign constant 2012-10-17 12:03:18 -07:00
Patrick Walton
91ae5412d8 rustc: Merge module and type namespaces. r=brson 2012-10-15 15:35:36 -07:00
Niko Matsakis
98887cc7ee remove ctor from ast (take 2) (no review: just dead code removal) 2012-10-12 19:46:37 -07:00
Tim Chevalier
7bdab1e4a4 Revert "remove ctor from ast"
This reverts commit ed3689d57c.
2012-10-08 09:00:23 -07:00
Niko Matsakis
ed3689d57c remove ctor from ast 2012-10-08 06:36:42 -07:00
Tim Chevalier
f96a2a2ca1 Remove by-mutable-ref mode from the compiler
and test cases. Closes #3513
2012-10-05 22:45:50 -07:00
Tim Chevalier
f8bc0d2545 Revert "wip"
This reverts commit ca49fd402a.
2012-10-05 16:10:08 -07:00
Tim Chevalier
ca49fd402a wip 2012-10-05 15:39:12 -07:00
Brian Anderson
9e0a43c932 Pretty-print item visibility modifiers 2012-09-28 15:04:23 -07:00
Niko Matsakis
21519bc7e0 demode vec 2012-09-28 13:27:45 -07:00
Brian Anderson
438bdd687b core: More option demoding 2012-09-27 17:49:10 -07:00
Erick Tryzelaar
b96af73159 turn ast::ident into a struct
This will help with the auto_serialize2 migration. We have to change
ident from a type alias to uint into a unique type. We need to use
a struct instead of a "enum ident = token::str_num" because structs
support constants, but newtypes do not.
2012-09-26 16:20:24 -07:00
Brian Anderson
afd91f8a56 Register snapshots. Remove redundant Eq impls, Makefile hacks 2012-09-23 23:01:49 -07:00
Brian Anderson
4a78f9b166 core: Demode option 2012-09-23 17:15:00 -07:00
Patrick Walton
f3d6c506a4 libsyntax: Fix botched merge 2012-09-21 18:44:00 -07:00
Patrick Walton
d48396c986 libcore: De-mode str 2012-09-21 18:37:06 -07:00
Graydon Hoare
dffe188991 Install new pub/priv/export rules as defaults, old rules accessible under #[legacy_exports]; 2012-09-21 18:11:43 -07:00
Brian Anderson
f5be40384f Revert "syntax: Make attributes sendable for rustdoc's benefit"
This reverts commit 90e3665fa7.
2012-09-20 18:15:39 -07:00
Brian Anderson
90e3665fa7 syntax: Make attributes sendable for rustdoc's benefit 2012-09-20 17:37:21 -07:00
Patrick Walton
9117dcb968 rustc: De-mode all overloaded operators 2012-09-20 09:48:05 -07:00
Niko Matsakis
cfed923600 demode the each() method on vec and other iterables. 2012-09-19 17:03:01 -07:00
Niko Matsakis
9cf271fe96 De-mode vec::each() and many of the str iteration routines
Note that the method foo.each() is not de-moded, nor the other
vec routines.
2012-09-19 10:52:59 -07:00
Niko Matsakis
8d4928f780 Revert "replace explicit calls to vec::each with vec::each_ref, partially demode str"
This reverts commit 1be24f0758.

Not quite ready.
2012-09-18 21:41:13 -07:00
Niko Matsakis
1be24f0758 replace explicit calls to vec::each with vec::each_ref, partially demode str 2012-09-18 21:31:00 -07:00
Erick Tryzelaar
d0d68c6036 libcore: make a copyless io::BytesWriter 2012-09-18 12:56:57 -07:00
Brian Anderson
2d11a04e74 libsyntax: Remove 'unchecked_blk' from AST 2012-09-18 11:51:17 -07:00
Niko Matsakis
7107b4eff5 Have parser recognize static, self region.
Fixes a bug in methods that &self couldn't be referenced in the
body. Also fixes #2479.
2012-09-14 15:22:15 -07:00
Niko Matsakis
8a8f200d10 Introduce auto adjustment table to subsume autoderef/autoref/borrowings.
Fixes #3261
Fixes #3443
2012-09-11 21:25:01 -07:00
Brian Anderson
ea01ee2e9e Convert 'use' to 'extern mod'. Remove old 'use' syntax 2012-09-11 19:25:43 -07:00
Brian Anderson
298eb8c726 Convert 'import' to 'use'. Remove 'import' keyword. 2012-09-10 19:04:26 -07:00
Tim Chevalier
f8b3eaae82 Make all moves explicit in libsyntax 2012-09-10 18:28:47 -07:00
Patrick Walton
22b8757705 rustc: Make shape-based compare glue never called for comparison operators.
Only called for string patterns.
2012-09-10 12:48:42 -07:00
Brian Anderson
3bd1f32cd9 Convert all kind bounds to camel case. Remove send, owned keywords. 2012-09-07 18:10:11 -07:00
Brian Anderson
2810ea9a68 Convert 'again' to 'loop'. Remove 'again' keyword 2012-09-07 17:39:03 -07:00
Tim Chevalier
f5093dff7b Remove support for multiple traits in a single impl
There was half-working support for them, but they were never fully
implemented or even approved. Remove them altogether.

Closes #3410
2012-09-07 17:22:04 -07:00
Tim Chevalier
53ce42dc4f Implement &-patterns
Closes #2855
2012-09-07 17:09:07 -07:00
Patrick Walton
feb014eb3c rustc: Add an "ne" method to the Eq trait, and implement it everywhere 2012-09-07 12:24:48 -07:00
Niko Matsakis
5e36a99794 Refactor trans to replace lvalue and friends with Datum.
Also:
- report illegal move/ref combos whether or not ref comes first
- commented out fix for #3387, too restrictive and causes an ICE
2012-09-06 06:11:12 -07:00
Brian Anderson
d3e75ea375 Parse 'loop' and 'again' the same 2012-09-04 13:37:11 -07:00
Patrick Walton
8ff18acc82 libsyntax: "import" -> "use" 2012-09-04 11:43:23 -07:00
Patrick Walton
6e7d5e1cbd rustc: Implement "use mod" 2012-08-31 11:20:50 -07:00
Graydon Hoare
28b1473f84 Fix anon-extern-mod pretty print test. 2012-08-31 10:30:32 -07:00
Patrick Walton
96534365c2 rustc: Make < and = into traits 2012-08-29 18:25:22 -07:00
Tim Chevalier
cb8ecd7984 Allow extern mods to be anonymous
extern mod {
  f();
}

is now allowed, and puts f in the enclosing scope. (Requires a
link_name attribute to be really useful...)
2012-08-29 12:22:05 -07:00
Brian Anderson
161a82e433 Camel case various core constructors 2012-08-27 17:22:18 -07:00
Erick Tryzelaar
65bd46c8a5 rustc: more pattern cleanup 2012-08-27 14:10:54 -07:00
Brian Anderson
8337fa1a54 Camel case the option type 2012-08-26 15:56:16 -07:00
Patrick Walton
d77acf7d07 libsyntax: Accept ',' to separate struct fields. Closes #3263. 2012-08-25 16:06:35 -07:00
Patrick Walton
8ef4551904 rustc: Implement foreign constants.
This is needed for a lot of Apple libraries, as Apple tends to put a lot of
globals in dynamic libraries.
2012-08-25 15:09:33 -07:00
Tim Chevalier
5e22fb9c7f Remove match check 2012-08-24 22:28:12 -07:00
Niko Matsakis
a8f1bee457 fix some unused pattern binding warnings 2012-08-24 15:37:21 -07:00
Niko Matsakis
e47d2f6060 extend liveness to treat bindings more like other variables
This results in a lot of warnings in rustc.  I left them in because
many are bugs and we should fix our code, but Graydon asked that
I not touch every file in the codebase.
2012-08-24 12:55:08 -07:00
Michael Sullivan
0f996f70a6 Remove purity from fn_decl and move it out to containing AST elements. 2012-08-23 19:40:01 -07:00
Tim Chevalier
80d129aa45 Parenthesize unary move exprs in prettyprinter
Closes #3220
2012-08-23 16:59:05 -07:00
Paul Stansifer
11b640d990 Pretty-print macros with () instead of {}. 2012-08-23 11:14:15 -07:00
Paul Stansifer
29f32b4a72 m1!{...} -> m1!(...) 2012-08-23 11:14:14 -07:00
Ben Blum
5b25fc918a Parse and typecheck moving out of enums (#2329) 2012-08-22 20:40:25 -04:00
Tim Chevalier
1b804ce343 Merge find_linkage_attrs with find_linkage_metas
This gets rid of a gratuitous `match check`.
2012-08-22 16:43:23 -07:00
Tim Chevalier
0a5f88a240 Change the log level to be an enum rather than an int
This allows for eliminating a match check.
2012-08-22 16:14:39 -07:00
Paul Stansifer
1153b5dcc8 intern identifiers 2012-08-22 14:59:25 -07:00
Paul Stansifer
9a7890d73a Centralize ident interner generation. 2012-08-22 14:59:24 -07:00
Michael Sullivan
457e78cd53 Make by-val explicit self actually work. Closes #2585. 2012-08-17 17:14:32 -07:00
Michael Sullivan
2b457c2654 Pretty print explicit self types. Work on #2585. 2012-08-17 17:14:32 -07:00
Patrick Walton
0d7bef4d48 libsyntax: Fix wrong pretty printing of private fields 2012-08-15 17:48:47 -07:00
Patrick Walton
3038968f28 rustc: Perform some AST surgery to separate out class fields from methods 2012-08-15 16:20:35 -07:00
Patrick Walton
bdb206f285 rustc: Parse labeled loop, break, and again 2012-08-15 16:20:34 -07:00
Patrick Walton
fe9d07dda6 rustc: "as Trait" can now be written "as @Trait".
There is also code for ~Trait and &Trait, but these are currently (incorrectly)
synonyms for "as @Trait" and "as &Trait".
2012-08-15 16:20:31 -07:00
Brian Anderson
74c69e1053 Convert more core types to camel case 2012-08-15 14:14:20 -07:00
Brian Anderson
11258310e2 Convert more core types to camel case 2012-08-14 18:26:03 -07:00
Daniel Patterson
62a9e16cb2 syntax: fixing pretty printing of brackets in match arms 2012-08-14 09:40:56 -04:00
Graydon Hoare
8271b3f0c8 More attempts at fixing .. breakage. 2012-08-14 05:17:38 +00:00
Patrick Walton
55ee06b8ce libsyntax: Accept "1..3" as the preferred form of "1 to 3" in patterns 2012-08-13 17:37:08 -07:00