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Allow integer to char -u (#5174)

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Tiffany Bennett 2022-04-13 03:33:08 -07:00 committed by GitHub
parent 3783c19d02
commit cfefb65d55
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1 changed files with 16 additions and 6 deletions
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20
crates/nu-command/src/strings/char_.rs
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@ -192,6 +192,11 @@ impl Command for Char {
example: r#"char -u 1f378"#,
result: Some(Value::test_string("\u{1f378}")),
},
Example {
description: "Output a character from an integer",
example: r#"char -u 0x61"#,
result: Some(Value::test_string("a")),
},
Example {
description: "Output multi-byte Unicode character",
example: r#"char -u 1F468 200D 1F466 200D 1F466"#,
@ -235,8 +240,8 @@ impl Command for Char {
.into_pipeline_data(engine_state.ctrlc.clone()));
}
// handle -u flag
let args: Vec<String> = call.rest(engine_state, stack, 0)?;
if call.has_flag("unicode") {
let args: Vec<Value> = call.rest(engine_state, stack, 0)?;
if args.is_empty() {
return Err(ShellError::MissingParameter(
"missing at least one unicode character".into(),
@ -249,10 +254,11 @@ impl Command for Char {
.positional_nth(i)
.expect("Unexpected missing argument")
.span;
multi_byte.push(string_to_unicode_char(arg, &span)?)
multi_byte.push(value_to_unicode_char(arg, &span)?)
}
Ok(Value::string(multi_byte, call_span).into_pipeline_data())
} else {
let args: Vec<String> = call.rest(engine_state, stack, 0)?;
if args.is_empty() {
return Err(ShellError::MissingParameter(
"missing name of the character".into(),
@ -274,10 +280,14 @@ impl Command for Char {
}
}
fn string_to_unicode_char(s: &str, t: &Span) -> Result<char, ShellError> {
let decoded_char = u32::from_str_radix(s, 16)
fn value_to_unicode_char(value: &Value, t: &Span) -> Result<char, ShellError> {
let decoded_char = match *value {
Value::String { ref val, .. } => u32::from_str_radix(val, 16)
.ok()
.and_then(std::char::from_u32);
.and_then(std::char::from_u32),
Value::Int { val, .. } => val.try_into().ok().and_then(std::char::from_u32),
_ => return Err(ShellError::TypeMismatch("string or int".to_owned(), *t)),
};
if let Some(ch) = decoded_char {
Ok(ch)