Rust is a native system programming language; its most notable use is the research layout engine Servo. Use this tag for specific issues for version 0.8
Questions tagged [rust-0.8]
7 questions
18
votes
1 answer
How can I read and write a text file in Rust?
Note: this question is about pre Rust 1.0 and thus outdated. See the linked duplicate for an up to date answer.
I'm writing a test program using Rust 0.8 on Win8, and I need to read and write some parameters used by the program to/from a text…
Brian Oh
- 9,604
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11
votes
3 answers
How do I return an owned array from a function?
I'm a Rust newbie trying to figure out the language by playing with it. I've hit some problems on trying to return an array from a function:
struct Widget {
thingies: ~[int]
}
impl Widget {
fn new() -> Widget {
Widget { thingies: ~[4,…
Greg Malcolm
- 3,238
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8
votes
4 answers
Can this Rust code be written without the "match" statement?
linuxfood has created bindings for sqlite3, for which I am thankful. I'm just starting to learn Rust (0.8), and I'm trying to understand exactly what this bit of code is doing:
extern mod sqlite;
fn db() {
let database =
match…
Brian Oh
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7
votes
1 answer
Why using Rust does passing a mutable struct to a function result in immutable fields?
I'm learning Rust using 0.8 on Win8-64. I have a test program I'm working on where a function that handles input of parameters returned a struct containing those parameters. That worked OK. I then altered the program to pass the &struct to the…
Brian Oh
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4
votes
1 answer
Calling an on-heap function argument inside of a closure
I'm using rust 0.8.
Why is it that I can do this:
fn add(num: ~int) -> ~fn(int) -> int { |x|
*num + x
}
but not this:
fn outer(num: ~int) -> ~fn(int) -> int { |x|
*inner(num) + x
}
fn inner(num: ~int) -> ~int {
num
}
the second one…
nnythm
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2
votes
2 answers
How do I convert a Zip into an array in rust 0.8?
The docs seem to indicate that after zipping two iterators together, you can turn them into an array with .from_iterator(), but when I try to do this, rust reports:
std::iter::Zip,std::vec::VecIterator<,int>>` does not…
mcandre
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2
votes
1 answer
How can I detect an error rather than have this Rust program abort?
When running the following test program (below) using Rust 0.8 on win8, if I run two instances of the program simultaneously, when the first program is waiting for input (line 12), then the second program aborts (line 7) with fatal error message…
Brian Oh
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