8 releases (4 breaking)
Uses old Rust 2015
0.5.1 | Nov 13, 2017 |
---|---|
0.5.0 | Oct 26, 2017 |
0.4.1 | Oct 26, 2017 |
0.3.0 | Jul 21, 2017 |
0.1.0 | Jul 6, 2017 |
#2296 in Parser implementations
62 downloads per month
Used in ion-shell
52KB
1.5K
SLoC
calc
calc
is a Rust library for tokenizing and evaluating arithmetic expressions with a command line application of the same name included.
NOTE: The name of the project, binary, and library are calc
but the package name is calculate
. This will remain depending on if this project can acquire the calc
crate which is currently being squatted on.
Usage
As a Library
Add calc
as a dependency in your Cargo.toml
:
[dependencies]
calculate = "0.5.*"
Then make use of the library functions:
extern crate calc;
use calc::eval;
use std::io::{self, BufRead, stdout, stdin, Write};
fn main() {
let stdout = stdout();
let mut stdout = stdout.lock();
let stdin = stdin();
for line in stdin.lock().lines() {
match line.unwrap().trim() {
"" => (),
"exit" => break,
s => writeln!(stdout, "{}", eval(s)).unwrap(),
}
}
}
As an Executable
$ cargo install calculate
...
$ calc
Dependencies
~2.2–3MB
~45K SLoC