This text is added to doc.go:
Explicit argument indexes:
In Printf, Sprintf, and Fprintf, the default behavior is for each
formatting verb to format successive arguments passed in the call.
However, the notation [n] immediately before the verb indicates that the
nth one-indexed argument is to be formatted instead. The same notation
before a '*' for a width or precision selects the argument index holding
the value. After processing a bracketed expression [n], arguments n+1,
n+2, etc. will be processed unless otherwise directed.
For example,
fmt.Sprintf("%[2]d %[1]d\n", 11, 22)
will yield "22, 11", while
fmt.Sprintf("%[3]*[2].*[1]f", 12.0, 2, 6),
equivalent to
fmt.Sprintf("%6.2f", 12.0),
will yield " 12.00". Because an explicit index affects subsequent verbs,
this notation can be used to print the same values multiple times
by resetting the index for the first argument to be repeated:
fmt.Sprintf("%d %d %#[1]x %#x", 16, 17)
will yield "16 17 0x10 0x11".
The notation chosen differs from that in C, but I believe it's easier to read
and to remember (we're indexing the arguments), and compatibility with
C's printf was never a strong goal anyway.
While we're here, change the word "field" to "arg" or "argument" in the
code; it was being misused and was confusing.
R=rsc, bradfitz, rogpeppe, minux.ma, peter.armitage
CC=golang-dev
https://golang.org/cl/9680043
This is a file of hints, not a file of polished text.
Let's not try to do polished text until we start the
release process.
R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/9750043
Several old TODOs are either resolved now (e.g. when is a return
needed), or are from a time the language wasn't frozen (^ for uints
only). Consolidated the others.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/9599044
I read docs and wrote a crawler + link checker on the plane,
which also checks for #fragments. I'll send that out later
when it's less gross.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8729050
Although one may argue that they should be legal, gc (at least)
disallows byte order marks that are not the first code point
in the file. Added a sentence to the "Implementation restriction"
clause in the "Source code representation" section to document
this better.
Lifting this restriction (again - the rule has changed at least
twice already) would not break any existing programs, should
we later decide yet again to fiddle the rules about these little
fly specks.
R=golang-dev, dsymonds, gri
CC=golang-dev
https://golang.org/cl/8649043
This version just tells you what to do, rather
than trying to teach you how it all works.
Should be much better for newcomers.
R=dave, gary.burd, alcosholik, r
CC=golang-dev
https://golang.org/cl/8247044
Also:
- put GORACE into the go env command
- do minor housekeeping on the race detector article
Fixes#4995.
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/8319044
Be deliberately vague, since the precise details should not be depended upon.
Fixes#5155.
R=golang-dev, gri, adg
CC=golang-dev
https://golang.org/cl/8283044
Also remove the introduction, which says what the rest of the
page says anyway.
Fixes#5182.
R=golang-dev, kamil.kisiel, r
CC=golang-dev
https://golang.org/cl/8281044
Mention support for NetBSD, OpenBSD, and cgo for linux/arm.
R=golang-dev, dvyukov, r, minux.ma, adg, bradfitz, adg
CC=golang-dev
https://golang.org/cl/8152043
- removed gratuitous empty lines that creeped into command line output
- changed comment color to a dark green so that links don't visually melt into them
- removed some TODOs
- updated doc.go
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8108044
Always use /home/you for $HOME in examples.
Trivial enough that someone else can integrate this change if they are editing go1.1.html
R=r
CC=golang-dev
https://golang.org/cl/8025043
Also:
- more consistenly use "xxx" statement rather than <code>xxx</code> statement
- fix/remove unnecessary links
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7821050
Will help people find the rules by searching the spec by
having a comment saying "missing return";
"terminating statement" does not evoke the rule to the
uninitiated.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/7838044
Also adjust the implementation of applyRelocationsAMD64
so that the test added in CL 6848044 still passes.
R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/7686049
Only the net stuff remains as significant work in the "minor changes" section.
R=golang-dev, dave, elias.naur, rsc
CC=golang-dev
https://golang.org/cl/7933044
The rule is not concistently followed by gc.
It appears that gccgo is ignoring it. go/types
does not implement this rule. However, both
gccgo and now go/types can compile/type-check
the entire std library (and thus all the shift
expressions occuring in it) w/o errors. For
more details see the discussion in issue 4883.
Fixes#4880.
Fixes#4881.
Fixes#4883.
R=rsc, r, iant, ken, ken, mtj, rogpeppe
CC=golang-dev
https://golang.org/cl/7707043
Tell Windows users how to update Mercurial's library.zip to add some missing dependencies.
Fixes#4745.
R=golang-dev, patrick.allen.higgins, minux.ma, adg
CC=golang-dev
https://golang.org/cl/7558043
Also rename the relevant examples and make sure the working one compiles.
R=golang-dev, bradfitz, adg, iant, rsc
CC=golang-dev
https://golang.org/cl/7597043
It's a common mistake to build a recursive String method; explain it well and
show how to avoid it.
R=golang-dev, bradfitz, adg
CC=golang-dev
https://golang.org/cl/7486049
Drop the phrase "reference types", which has caused confusion.
Add a section about 2D arrays, a common newbie question.
R=golang-dev, cespare, adg, rsc
CC=golang-dev
https://golang.org/cl/7423051
The only functional change is the new section
on terminating statements.
There is a minor syntax rewrite (not change)
of function declarations to make it easier to
refer to the notion of a function from all places
where it is used (function decls, method decls,
and function literals).
Includes some minor fixes/additions of missing links.
Based closely on Russ' proposal.
Fixes#65.
R=rsc, r, iant, ken, bradfitz
CC=golang-dev
https://golang.org/cl/7415050
