Port str upcase (#404)

* Port str upcase

* Switch to to_uppercase to support more characters than only ASCII
This commit is contained in:
onthebridgetonowhere 2021-12-03 03:00:32 +01:00 committed by GitHub
parent c5297d2b64
commit bf82417d52
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3 changed files with 112 additions and 0 deletions

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@ -148,6 +148,7 @@ pub fn create_default_context() -> EngineState {
StrStartsWith,
StrReverse,
StrSubstring,
StrUpcase,
StrTrim,
Sys,
Table,

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@ -13,6 +13,7 @@ mod rpad;
mod starts_with;
mod substring;
mod trim;
mod upcase;
pub use capitalize::SubCommand as StrCapitalize;
pub use case::*;
@ -29,3 +30,4 @@ pub use rpad::SubCommand as StrRpad;
pub use starts_with::SubCommand as StrStartsWith;
pub use substring::SubCommand as StrSubstring;
pub use trim::Trim as StrTrim;
pub use upcase::SubCommand as StrUpcase;

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@ -0,0 +1,109 @@
use nu_engine::CallExt;
use nu_protocol::ast::Call;
use nu_protocol::ast::CellPath;
use nu_protocol::engine::{Command, EngineState, Stack};
use nu_protocol::{Example, PipelineData, ShellError, Signature, Span, SyntaxShape, Value};
#[derive(Clone)]
pub struct SubCommand;
impl Command for SubCommand {
fn name(&self) -> &str {
"str upcase"
}
fn signature(&self) -> Signature {
Signature::build("str upcase").rest(
"rest",
SyntaxShape::CellPath,
"optionally upcase text by column paths",
)
}
fn usage(&self) -> &str {
"upcases text"
}
fn run(
&self,
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
operate(engine_state, stack, call, input)
}
fn examples(&self) -> Vec<Example> {
vec![Example {
description: "Upcase contents",
example: "'nu' | str upcase",
result: Some(Value::test_string("NU")),
}]
}
}
fn operate(
engine_state: &EngineState,
stack: &mut Stack,
call: &Call,
input: PipelineData,
) -> Result<PipelineData, ShellError> {
let head = call.head;
let column_paths: Vec<CellPath> = call.rest(engine_state, stack, 0)?;
input.map(
move |v| {
if column_paths.is_empty() {
action(&v, head)
} else {
let mut ret = v;
for path in &column_paths {
let r =
ret.update_cell_path(&path.members, Box::new(move |old| action(old, head)));
if let Err(error) = r {
return Value::Error { error };
}
}
ret
}
},
engine_state.ctrlc.clone(),
)
}
fn action(input: &Value, head: Span) -> Value {
match input {
Value::String { val: s, .. } => Value::String {
val: s.to_uppercase(),
span: head,
},
other => {
let got = format!("Expected string but got {}", other.get_type());
Value::Error {
error: ShellError::UnsupportedInput(got, head),
}
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use super::{action, SubCommand};
#[test]
fn test_examples() {
use crate::test_examples;
test_examples(SubCommand {})
}
#[test]
fn upcases() {
let word = Value::test_string("andres");
let actual = action(&word, Span::unknown());
let expected = Value::test_string("ANDRES");
assert_eq!(actual, expected);
}
}