At this point of the book, reader have likely use `cargo new --bin`,
likely 2 times, once if they are lazy. This remind them of the `cargo`
syntax.
I was myself unsure whether it was `cargo create`, `cargo new`, and
whether it would initialize in current working directory or needed a
target.
The book was located under 'src/doc/trpl' because originally, it was
going to be hosted under that URL. Late in the game, before 1.0, we
decided that /book was a better one, so we changed the output, but
not the input. This causes confusion for no good reason. So we'll change
the source directory to look like the output directory, like for every
other thing in src/doc.
Fixes#29853Fixes#29852
While these points are true, we're not going for 100% accuracy here,
this is introductory material. Changing these things would be more
confusing, but it is important to note that we're presenting an
abstraction here.
r? @huonw
I noticed the nomicon was not listed!
I also removed links to racer and rustfmt since they were not *doc-specific* links, just links to tools, as well as pointed the cargo link directly at the docs.
Removed all the community stuff. There are lots of other places to find this now, including the website.
With pending website changes this page will continue to be pared back, reflecting only what's in-tree, not general Rust docs.
r? @steveklabnik
Fixes#29853Fixes#29852
While these points are true, we're not going for 100% accuracy here,
this is introductory material. Changing these things would be more
confusing, but it is important to note that we're presenting an
abstraction here.
- Check privacy sanity in all blocks, not only function bodies
- Check all fields, not only named
- Check all impl items, not only methods
- Check default impls
- Move the sanity check in the beginning of privacy checking, so others could rely on it
Technically it's a [breaking-change], but I expect no breakage because, well, it's *sane* privacy visitor, if code is broken it must be insane by definition!
The struct_variant feature was accepted and is no longer feature gated.
See #19122, #19124
§6.1.6 Enumerations shows an example of a struct-like enum variant.
In src/doc/trpl/error-handling.md, in this section:
It mentions three steps, to "convert this to proper error handling", the last one being:
3. Handle the error in main.
However, it is not shown. This pull request adds a code example showing how `main`'s call to `search` should use case analysis. I am still very much new to learning Rust, so this may not be idiomatic. Happy to make changes with guidance.
The struct_variant feature was accepted and is no longer feature gated.
See #19122, #19124
§6.1.6 Enumerations shows an example of a struct-like enum variant.
Originally, this was my 30 minute introduction, and we eventually made
it the opener to the book. But as #25918 has shown, the example I use
here has some issues. The good news is that Rust makes heap allocation
syntatically expensive, but the bad news is that that means showing
equivalent programs from Rust and other languages is difficult. After
thinking about it, I'm not sure this section is pulling its weight, and
since it has problems, I'd rather just pull it than try to re-write it
right now. I think the book is fine without it.
FIxes#25918
Originally, this was my 30 minute introduction, and we eventually made
it the opener to the book. But as #25918 has shown, the example I use
here has some issues. The good news is that Rust makes heap allocation
syntatically expensive, but the bad news is that that means showing
equivalent programs from Rust and other languages is difficult. After
thinking about it, I'm not sure this section is pulling its weight, and
since it has problems, I'd rather just pull it than try to re-write it
right now. I think the book is fine without it.
FIxes#25918
Reword "Writing the logic" paragraph to prevent `unwrap` being confused for a macro (and other small changes to improve the flow of the paragraph).
cc @steveklabnik
I did some preliminary editing work with No Starch on the first chapter of the book, and here's some of the results. We're going to want to return to this later when @brson etc's new rustup work is done, so this is mostly just a first pass.
But, we agreed that having separate chapters for each of this bit of intro is a bit excessive. So let's move all of this intro stuff into one chapter.
I'd appreciate a careful review of this, as there was also some confusion about some things, which resulted in me taking one huge markdown file apart and splitting it back up, as well as some editor issues, so I _think_ this looks good, but double checking things matters!
/cc @aturon
I read this section a few times before even having a guess what
was meant, then consulted IRC for confirmation. It may be that I
was thick-headed, but I think this is a useful addition.
I read this section a few times before even having a guess what
was meant, then consulted IRC for confirmation. It may be that I
was thick-headed, but I think this is a useful addition.
Note: for now, this change only affects `-windows-gnu` builds.
So why was this `libgcc` dylib dependency needed in the first place?
The stack unwinder needs to know about locations of unwind tables of all the modules loaded in the current process. The easiest portable way of achieving this is to have each module register itself with the unwinder when loaded into the process. All modules compiled by GCC do this by calling the __register_frame_info() in their startup code (that's `crtbegin.o` and `crtend.o`, which are automatically linked into any gcc output).
Another important piece is that there should be only one copy of the unwinder (and thus unwind tables registry) in the process. This pretty much means that the unwinder must be in a shared library (unless everything is statically linked).
Now, Rust compiler tries very hard to make sure that any given Rust crate appears in the final output just once. So if we link the unwinder statically to one of Rust's crates, everything should be fine.
Unfortunately, GCC startup objects are built under assumption that `libgcc` is the one true place for the unwind info registry, so I couldn't find any better way than to replace them. So out go `crtbegin`/`crtend`, in come `rsbegin`/`rsend`!
A side benefit of this change is that rustc is now more in control of the command line that goes to the linker, so we could stop using `gcc` as the linker driver and just invoke `ld` directly.
This is two sentences that have been comma spliced, and should
be split with a full stop. (This error made me stop and re-read,
and I submit this as an actual improvement to readability, not
as a grammar weird-o!)
This is two sentences that have been comma spliced, and should
be split with a full stop. (This error made me stop and re-read,
and I submit this as an actual improvement to readability, not
as a grammar weird-o!)
I put the reference under the function return operator `->` rather than near the suggested `!` operators as I thought it was more relevant there.
Resolves#29431
