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Fix code in WASI-tutorial.md

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This commit is contained in:
hayasshi
2020-12-26 17:22:12 +09:00
committed by Dan Gohman
parent 40887c655f
commit 4c7e66e58e
1 changed files with 3 additions and 3 deletions
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6
docs/WASI-tutorial.md
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@@ -121,14 +121,14 @@ use std::io::{Read, Write};
fn process(input_fname: &str, output_fname: &str) -> Result<(), String> { fn process(input_fname: &str, output_fname: &str) -> Result<(), String> {
let mut input_file = let mut input_file =
fs::File::open(input_fname).map_err(|err| format!("error opening input: {}", err))?; fs::File::open(input_fname).map_err(|err| format!("error opening input {}: {}", input_fname, err))?;
let mut contents = Vec::new(); let mut contents = Vec::new();
input_file input_file
.read_to_end(&mut contents) .read_to_end(&mut contents)
.map_err(|err| format!("read error: {}", err))?; .map_err(|err| format!("read error: {}", err))?;
let mut output_file = fs::File::create(output_fname) let mut output_file = fs::File::create(output_fname)
.map_err(|err| format!("error opening output '{}': {}", output_fname, err))?; .map_err(|err| format!("error opening output {}: {}", output_fname, err))?;
output_file output_file
.write_all(&contents) .write_all(&contents)
.map_err(|err| format!("write error: {}", err)) .map_err(|err| format!("write error: {}", err))
@@ -139,7 +139,7 @@ fn main() {
let program = args[0].clone(); let program = args[0].clone();
if args.len() < 3 { if args.len() < 3 {
eprintln!("{} <input_file> <output_file>", program); eprintln!("usage: {} <input_file> <output_file>", program);
return; return;
} }