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238 Commits

Author SHA1 Message Date
Rob Pike
d55370760f allow "comma ok" in initializers 
DELTA=11  (4 added, 0 deleted, 7 changed)
OCL=33698
CL=33712
 2009-08-22 00:04:04 -07:00
Rob Pike
83cbca5657 rewrite type rules for expressions and add shift examples 
DELTA=48  (22 added, 0 deleted, 26 changed)
OCL=33657
CL=33668
 2009-08-21 14:18:08 -07:00
Robert Griesemer
ef45e64afc - unifying rules for var decls, short var decls, and assignments 
DELTA=39  (4 added, 15 deleted, 20 changed)
OCL=33639
CL=33649
 2009-08-21 11:25:00 -07:00
Russ Cox
8a45917f3d len and cap on chans 
R=ken
OCL=33599
CL=33599
 2009-08-20 11:12:04 -07:00
Russ Cox
7c4f7cc7eb introduce meaningful section names, so that 
go_spec.html#Return_statements

can be used to link to spec sections.  passes hlint.
renamed final section to simply "Implementation differences"
to shorten the name, but otherwise no non-formatting changes

R=gri
DELTA=230  (10 added, 0 deleted, 220 changed)
OCL=33598
CL=33598
 2009-08-20 11:11:03 -07:00
Russ Cox
fe53795422 clean up multifile package section. 
remove ASCII digit comment that isn't true.

R=gri
DELTA=41  (1 added, 25 deleted, 15 changed)
OCL=33594
CL=33596
 2009-08-20 10:47:40 -07:00
Russ Cox
16b95ba614 simplifications. 
mark multifile section with TODO only
because that is a bigger change.

R=gri
DELTA=45  (9 added, 22 deleted, 14 changed)
OCL=33565
CL=33593
 2009-08-20 10:22:52 -07:00
Robert Griesemer
0a162a1433 new scope rules 
DELTA=137  (50 added, 24 deleted, 63 changed)
OCL=33476
CL=33553
 2009-08-19 16:44:04 -07:00
Ian Lance Taylor
3e804ba7a7 There should not be a prohibition against embedding an 
interface type in a struct.  It is meaningful and the
compilers support it.

R=gri
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=33378
CL=33384
 2009-08-17 11:40:57 -07:00
Robert Griesemer
4023dce70f - remove language on forward decls 
- remove language on (in-)complete types

DELTA=95  (8 added, 62 deleted, 25 changed)
OCL=33310
CL=33322
 2009-08-14 17:41:52 -07:00
Robert Griesemer
4b90833803 - clarified section on return statements 
- added some TODOs

DELTA=46  (15 added, 4 deleted, 27 changed)
OCL=32901
CL=32918
 2009-08-07 17:05:41 -07:00
Robert Griesemer
7539c8501d language re: conversion of left operand in shift operations 
DELTA=5  (5 added, 0 deleted, 0 changed)
OCL=32484
CL=32617
 2009-07-31 18:05:07 -07:00
Robert Griesemer
e1b8cb8cf0 - renamed SimpleVarDecl -> ShortVarDecl, in sync with terminology used in prose 
- added a few TODOs

R=r
DELTA=4  (2 added, 0 deleted, 2 changed)
OCL=31751
CL=31756
 2009-07-16 20:31:41 -07:00
Robert Griesemer
7c06f285d0 capital_letter was never used 
R=rsc
DELTA=2  (0 added, 1 deleted, 1 changed)
OCL=31472
CL=31477
 2009-07-10 18:21:07 -07:00
Robert Griesemer
f7ac313629 - mark actual EBNF with pre-formatted class "ebnf" instead of "grammar" 
- make real productions for Unicode char classes so that they can be parsed
- use `` for tokens that contain "'s or \'s so that they can be parsed
- added a missing '.'

This version of the spec passes through ebnflint (forthcoming) without errors.

R=r,rsc
DELTA=74  (3 added, 1 deleted, 70 changed)
OCL=31464
CL=31466
 2009-07-10 16:06:40 -07:00
Russ Cox
ec9b0428f8 various spec tunings 
R=gri
DELTA=6  (0 added, 1 deleted, 5 changed)
OCL=31415
CL=31419
 2009-07-09 16:44:13 -07:00
Russ Cox
eaa92e027b Allow indexing of slice types, but not pointer to slice type. 
Allow indexing of string type, but not pointer to string type.
Do not allow indexing of pointer to map type.

R=r
DELTA=18  (14 added, 0 deleted, 4 changed)
OCL=30586
CL=30754
 2009-06-25 14:43:55 -07:00
Robert Griesemer
e2cb60b378 fix for conversion rule 
R=rsc
DELTA=25  (10 added, 7 deleted, 8 changed)
OCL=30516
CL=30531
 2009-06-19 13:03:01 -07:00
Robert Griesemer
db7a6221e9 raw strings may span multiple lines 
R=r
DELTA=7  (2 added, 0 deleted, 5 changed)
OCL=30492
CL=30494
 2009-06-18 13:51:14 -07:00
Robert Griesemer
cfe9211753 - removed duplicate definition of StringLit 
- fixed nonsense sentence in numeric basic type section
- hlinted

R=r,rsc
DELTA=50  (10 added, 22 deleted, 18 changed)
OCL=30484
CL=30490
 2009-06-18 13:29:40 -07:00
Robert Griesemer
3b576a7704 fix for incorrect type switch clause: 
- nil is not a keyword
- type -> Type

R=rsc
DELTA=10  (4 added, 0 deleted, 6 changed)
OCL=30433
CL=30435
 2009-06-17 14:31:33 -07:00
Rob Pike
6739b8d606 string([]int) is now implemented 
R=rsc
DELTA=18  (10 added, 2 deleted, 6 changed)
OCL=29909
CL=29909
 2009-06-04 16:51:47 -07:00
Russ Cox
d83dc4f5c6 unary ^ update. 
[]int -> string is already in the document.

DELTA=7  (1 added, 1 deleted, 5 changed)
OCL=29622
CL=29631
 2009-05-29 16:04:16 -07:00
Rob Pike
65ec16b637 Automated g4 rollback of changelist 29478. 
*** Reason for rollback ***

  these semicolons are necessary only because of a bug in 6g

*** Original change description ***

add missing semicolons in example

TBR=gri
OCL=29624
CL=29624
 2009-05-29 15:46:03 -07:00
Rob Pike
c4a74b0b4a add missing semicolons in example 
R=rsc
DELTA=5  (0 added, 0 deleted, 5 changed)
OCL=29475
CL=29478
 2009-05-27 18:31:28 -07:00
Robert Griesemer
838cf124f0 key:value notation for composites 
R=rsc
DELTA=106  (69 added, 9 deleted, 28 changed)
OCL=29203
CL=29254
 2009-05-22 10:25:06 -07:00
Russ Cox
b89a54e5c6 new, stricter interface rule: 
in x.(T) x cannot be a nil (uninitialized) interface variable.

remove TODO per discussion.

DELTA=3  (1 added, 1 deleted, 1 changed)
OCL=29123
CL=29134
 2009-05-20 18:16:04 -07:00
Robert Griesemer
c1fd171d18 removed TODO 
(new rules on type compatibility cover this already)

DELTA=2  (0 added, 2 deleted, 0 changed)
OCL=29094
CL=29096
 2009-05-20 11:10:18 -07:00
Robert Griesemer
56809d0ade new method set rules 
DELTA=63  (27 added, 6 deleted, 30 changed)
OCL=29065
CL=29091
 2009-05-20 11:02:48 -07:00
Robert Griesemer
533dfd6291 New type compatibility rules: 
- changed type equality to type compatibility, updated rules
- string literals have ideal string type
- conversion w/ relaxed type compatibilty

DELTA=123  (26 added, 22 deleted, 75 changed)
OCL=28763
CL=28780
 2009-05-13 16:56:00 -07:00
Robert Griesemer
98b4f6ac38 cleanup of unsafe documentation 
R=r
DELTA=19  (4 added, 7 deleted, 8 changed)
OCL=28723
CL=28732
 2009-05-12 21:37:46 -07:00
Rob Pike
fb24d792da update spec to io.Writer 
R=rsc
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=28528
CL=28531
 2009-05-08 11:21:20 -07:00
Robert Griesemer
1a304e1d93 - document string([]int{...}) conversion 
- cleanup of open issues section

R=r
DELTA=31  (12 added, 9 deleted, 10 changed)
OCL=28450
CL=28513
 2009-05-08 10:25:06 -07:00
Robert Griesemer
4f18549c02 clarifying ambiguity of evaluation order 
R=r
DELTA=16  (0 added, 3 deleted, 13 changed)
OCL=28133
CL=28178
 2009-05-01 17:00:16 -07:00
Robert Griesemer
ce9fbdbee0 typo in spec 
R=tgs
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=28032
CL=28032
 2009-04-29 11:45:08 -07:00
Robert Griesemer
88a0c4071d fixed typo in EBNF of ENBF 
R=iant
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=27801
CL=27806
 2009-04-23 14:42:21 -07:00
Robert Griesemer
40d6bb5969 - book-keeping in the TODO section: 
- removed closed, resolved, or off-the-table items
  - consolidated remaining items
- no changes to the spec

R=r
DELTA=116  (1 added, 102 deleted, 13 changed)
OCL=27596
CL=27640
 2009-04-20 15:32:20 -07:00
Rob Pike
2a1683a007 spec change for redeclaration 
R=iant,gri
DELTA=14  (14 added, 0 deleted, 0 changed)
OCL=27615
CL=27618
 2009-04-19 20:04:15 -07:00
Russ Cox
bcdc247f28 spec edits for array slice change 
R=r
DELTA=6  (0 added, 2 deleted, 4 changed)
OCL=27532
CL=27582
 2009-04-16 23:06:48 -07:00
Rob Pike
55faa5f10e fix one word for consistency. 
R=gri
OCL=27543
CL=27543
 2009-04-15 21:49:50 -07:00
Rob Pike
b340879ce3 tweak grammar and associated prose to permit things like x.y in range clauses. 
R=rsc
DELTA=5  (3 added, 0 deleted, 2 changed)
OCL=27536
CL=27540
 2009-04-15 20:51:17 -07:00
Rob Pike
7aee71bd4f spec for range on strings 
R=rsc,iant
DELTA=17  (11 added, 0 deleted, 6 changed)
OCL=27529
CL=27535
 2009-04-15 20:28:25 -07:00
Rob Pike
c956e90913 add a section about order of evaluation 
DELTA=32  (29 added, 2 deleted, 1 changed)
OCL=27197
CL=27469
 2009-04-14 20:10:49 -07:00
Rob Pike
736a1aeb81 an attempt at simpler yet more correct semicolon rules. 
(i'd be happy to drop the paren one as well, reducing it to one case)

DELTA=4  (0 added, 3 deleted, 1 changed)
OCL=27058
CL=27060
 2009-04-02 23:03:41 -07:00
Rob Pike
f538760552 fix last 3 references to 'type guards' 
R=gri
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=26908
CL=26908
 2009-03-30 16:08:41 -07:00
Robert Griesemer
c5c577c1ff - minor tweak to composite literal production: 
renamed PairExpr -> KeyValueExpr and PairExprList -> KeyValueList
(to match corresponding nodes in AST per rsc' suggestion)

- added a couple of TODOs

R=r,rsc
DELTA=10  (2 added, 0 deleted, 8 changed)
OCL=26837
CL=26840
 2009-03-27 13:43:28 -07:00
Robert Griesemer
62fd90ab76 use FunctionType in FunctionLit production 
R=r
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=26738
CL=26753
 2009-03-25 13:58:44 -07:00
Rob Pike
21d03496e7 add some words (written by rsc) about the state of typed constants. 
DELTA=31  (31 added, 0 deleted, 0 changed)
OCL=26709
CL=26716
 2009-03-24 19:16:42 -07:00
Rob Pike
1141716c5c change notation: s/Stat/Stmt/ in grammatical productions 
DELTA=26  (0 added, 0 deleted, 26 changed)
OCL=26703
CL=26705
 2009-03-24 17:45:53 -07:00
Rob Pike
94b67eb8d8 delete incorrect, dreg example of select on type 
R=gri,rsc
DELTA=48  (28 added, 11 deleted, 9 changed)
OCL=26630
CL=26701
 2009-03-24 17:40:47 -07:00
Rob Pike
afee1c5f0c add simple text about & and *. 
clean up html: PLEASE RUN TIDY WHEN YOU EDIT THIS DOCUMENT
deferring method value update until we decide what happens.

R=gri
DELTA=50  (38 added, 4 deleted, 8 changed)
OCL=26609
CL=26612
 2009-03-20 17:41:25 -07:00
Rob Pike
2a5af744a6 fix wording of &T{x} 
R=rsc
DELTA=5  (0 added, 2 deleted, 3 changed)
OCL=26607
CL=26607
 2009-03-20 17:03:48 -07:00
Robert Griesemer
091cba8d03 minor adjustments to switches text 
R=r
DELTA=16  (5 added, 1 deleted, 10 changed)
OCL=26530
CL=26543
 2009-03-19 08:39:40 -07:00
Rob Pike
37ab838d3a &Foo{x,y} wasn't in the spec. This gets it in, dependent on a proper section regarding 
address operators, to follow.

R=rsc
DELTA=11  (10 added, 0 deleted, 1 changed)
OCL=26529
CL=26532
 2009-03-18 22:58:36 -07:00
Rob Pike
70c1a106e6 drop the ,ok switch; keep the straight type switch. 
R=rsc,gri
DELTA=97  (26 added, 42 deleted, 29 changed)
OCL=26436
CL=26527
 2009-03-18 19:23:59 -07:00
Rob Pike
5a5784977a type switches 
R=rsc,gri
DELTA=107  (90 added, 1 deleted, 16 changed)
OCL=26420
CL=26427
 2009-03-17 16:48:35 -07:00
Robert Griesemer
dea4394a67 instead of unlabeled statements, have a single labeled statement 
- no syntactic or semantic change

R=r
DELTA=45  (24 added, 18 deleted, 3 changed)
OCL=26349
CL=26368
 2009-03-16 17:36:52 -07:00
Russ Cox
f8ba0f4511 mem.html: nit 
go_spec.html: document const type propagation

R=ken
OCL=26223
CL=26225
 2009-03-12 19:04:56 -07:00
Rob Pike
9b5d82327b s/expressios/expressions/ 
OCL=26222
CL=26222
 2009-03-12 18:47:49 -07:00
Rob Pike
e20834092f weasel words about types in shift expressions suggested by rsc 
R=rsc
OCL=26220
CL=26220
 2009-03-12 18:40:07 -07:00
Rob Pike
ce9417ee1a fix language regarding type of numeric literals 
R=rsc
DELTA=4  (0 added, 2 deleted, 2 changed)
OCL=26208
CL=26212
 2009-03-12 17:08:47 -07:00
Rob Pike
307ec21932 what is the name for "&^". let's go with bit clear (and not) 
R=rsc
DELTA=14  (0 added, 0 deleted, 14 changed)
OCL=26159
CL=26206
 2009-03-12 15:53:56 -07:00
Rob Pike
0282719387 fix unqouted & 
R=gri
OCL=26158
CL=26158
 2009-03-11 22:02:18 -07:00
Rob Pike
cd04ec95ea bit clear: &^ and &^= 
R=gri
DELTA=5  (3 added, 0 deleted, 2 changed)
OCL=26155
CL=26157
 2009-03-11 21:59:05 -07:00
Rob Pike
ef1b9653dd conversions are mostly cleaned up; bring the spec in line. 
R=gri
DELTA=31  (12 added, 18 deleted, 1 changed)
OCL=25974
CL=25976
 2009-03-09 22:35:06 -07:00
Robert Griesemer
b813ee0e44 revert QualifiedIdent to old production 
R=r
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=25732
CL=25777
 2009-03-05 15:01:54 -08:00
Rob Pike
811dd2584c fix an HTML glitch. 
say a little more about package main.

R=rsc
DELTA=7  (4 added, 0 deleted, 3 changed)
OCL=25725
CL=25725
 2009-03-04 20:39:39 -08:00
Russ Cox
5958dd6f94 Suggested tweaks up to package section. 
Major ones:
* Be consistent: "numeric type" and "arithmetic operator".
* if/swtch take "simple statement" not "short variable declaration".
* There was a comment that implied for x,y := range z() might
  evaluate z() multiple times.  I deleted it.

R=r,gri
DELTA=124  (24 added, 4 deleted, 96 changed)
OCL=25706
CL=25715
 2009-03-04 17:19:21 -08:00
Russ Cox
461dd9126c change Go logo to link to home page 
fix grammar for forward declaration of interface, struct.

move array down next to slice.

fix type equal example for structs.

R=r,gri
DELTA=247  (122 added, 114 deleted, 11 changed)
OCL=25694
CL=25704
 2009-03-04 14:44:51 -08:00
Rob Pike
337ce2220f rephrase redundancy. 
R=rsc
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=25652
CL=25656
 2009-03-03 16:10:15 -08:00
Russ Cox
7a5e97ba91 The final piece of the alternative to my parens proposal 
(i.e., the status quo with braces in composite literals).

DELTA=20  (16 added, 0 deleted, 4 changed)
OCL=25640
CL=25646
 2009-03-03 15:40:30 -08:00
Russ Cox
e8b43190bb clarify conversions vs type guards. 
allow conversions between equal types.

R=r
DELTA=15  (4 added, 4 deleted, 7 changed)
OCL=25618
CL=25630
 2009-03-03 08:10:25 -08:00
Rob Pike
da34bea950 redo poor example of slices. 
R=rsc
OCL=25614
CL=25614
 2009-03-02 20:17:12 -08:00
Rob Pike
da38974c88 address most of the editorial comments through "types" 
R=rsc
DELTA=41  (9 added, 4 deleted, 28 changed)
OCL=25611
CL=25611
 2009-03-02 19:13:40 -08:00
Rob Pike
426335f87b delete paragraph about unimplemented select-on-type feature. 
change () to {} in all composite literals

DELTA=20  (0 added, 7 deleted, 13 changed)
OCL=25604
CL=25606
 2009-03-02 17:52:52 -08:00
Rob Pike
4659685b8f Packages. 
DELTA=170  (73 added, 21 deleted, 76 changed)
OCL=25556
CL=25594
 2009-03-02 16:17:29 -08:00
Rob Pike
96750f130c most of the rest. 
only the package section is untouched.

R=gri
DELTA=542  (186 added, 70 deleted, 286 changed)
OCL=25485
CL=25532
 2009-02-27 16:47:48 -08:00
Rob Pike
df3183f528 finish types. 
expressions.  (they were in pretty good shape; mostly cosmetic and HTML edits)

R=gri
DELTA=655  (226 added, 97 deleted, 332 changed)
OCL=25459
CL=25481
 2009-02-26 16:37:23 -08:00
Robert Griesemer
f88c6c136c fixed a typo 
R=r
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=25449
CL=25449
 2009-02-25 16:58:57 -08:00
Rob Pike
8f2330dd7a Continue editing types section. 
Do a little work polishing the "zero value" discussion.

R=gri
DELTA=486  (129 added, 120 deleted, 237 changed)
OCL=25392
CL=25444
 2009-02-25 16:20:44 -08:00
Rob Pike
cdbf619750 complete types 
R=gri
DELTA=29  (0 added, 12 deleted, 17 changed)
OCL=25388
CL=25391
 2009-02-24 17:47:45 -08:00
Rob Pike
5af7de3fe3 Updated the section on Types. 
Moved assignment compatibility to its own small section. Although most rules are type-specific,
some are not and it reduces redundancy to combine them.
Also, more experimentally, wrote a section on comparison compatibility.

R=gri
DELTA=382  (125 added, 122 deleted, 135 changed)
OCL=25355
CL=25382
 2009-02-24 15:17:59 -08:00
Rob Pike
a9ed30ff37 Move Types before Declarations and Scopes. 
This is the only change in this CL: only rearrangement, no content change, so subsequent edits will be easier to understand.

R=gri
OCL=25353
CL=25353
 2009-02-23 19:26:07 -08:00
Rob Pike
f27e9f072d Work on declarations, unsafe, alignment. 
Change <tt> to <code>

R=gri
DELTA=664  (222 added, 189 deleted, 253 changed)
OCL=25294
CL=25352
 2009-02-23 19:22:05 -08:00
Rob Pike
ff70f09d27 Rewrite lexical section. 
Put grammar productions into a box with a separate background color.

R=gri
DELTA=397  (132 added, 49 deleted, 216 changed)
OCL=25235
CL=25258
 2009-02-20 13:36:14 -08:00
Rob Pike
fd1f3830c1 autogenerate the table of contents 
R=rsc
DELTA=149  (1 added, 145 deleted, 3 changed)
OCL=25231
CL=25234
 2009-02-19 19:49:56 -08:00
Rob Pike
4501d348e8 Fix most HTML errors. 
Cut introduction.
Start rewrite.

R=gri
DELTA=201  (20 added, 118 deleted, 63 changed)
OCL=25226
CL=25229
 2009-02-19 17:31:36 -08:00
Robert Griesemer
c2d5586c76 go_spec.txt formatted in html. 
No textual changes except for html formatting.
Seems like a fine intermediate step.

R=r
DELTA=7638  (4079 added, 3559 deleted, 0 changed)
OCL=25211
CL=25224
 2009-02-19 16:49:10 -08:00