vrl/stdlib/
upcase.rs

1use crate::compiler::prelude::*;
2
3fn upcase(value: &Value) -> Resolved {
4    Ok(value.try_bytes_utf8_lossy()?.to_uppercase().into())
5}
6
7#[derive(Clone, Copy, Debug)]
8pub struct Upcase;
9
10impl Function for Upcase {
11    fn identifier(&self) -> &'static str {
12        "upcase"
13    }
14
15    fn usage(&self) -> &'static str {
16        "Upcases `value`, where upcase is defined according to the Unicode Derived Core Property Uppercase."
17    }
18
19    fn category(&self) -> &'static str {
20        Category::String.as_ref()
21    }
22
23    fn return_kind(&self) -> u16 {
24        kind::BYTES
25    }
26
27    fn examples(&self) -> &'static [Example] {
28        &[example! {
29            title: "Upcase a string",
30            source: r#"upcase("Hello, World!")"#,
31            result: Ok("HELLO, WORLD!"),
32        }]
33    }
34
35    fn parameters(&self) -> &'static [Parameter] {
36        const PARAMETERS: &[Parameter] = &[Parameter::required(
37            "value",
38            kind::BYTES,
39            "The string to convert to uppercase.",
40        )];
41        PARAMETERS
42    }
43
44    fn compile(
45        &self,
46        _state: &state::TypeState,
47        _ctx: &mut FunctionCompileContext,
48        arguments: ArgumentList,
49    ) -> Compiled {
50        let value = arguments.required("value");
51
52        Ok(UpcaseFn { value }.as_expr())
53    }
54}
55
56#[derive(Debug, Clone)]
57struct UpcaseFn {
58    value: Box<dyn Expression>,
59}
60
61impl FunctionExpression for UpcaseFn {
62    fn resolve(&self, ctx: &mut Context) -> Resolved {
63        let value = self.value.resolve(ctx)?;
64        upcase(&value)
65    }
66
67    fn type_def(&self, _: &TypeState) -> TypeDef {
68        TypeDef::bytes().infallible()
69    }
70}
71
72#[cfg(test)]
73mod tests {
74    use super::*;
75    use crate::value;
76
77    test_function![
78        upcase => Upcase;
79
80        simple {
81            args: func_args![value: "FOO 2 bar"],
82            want: Ok(value!("FOO 2 BAR")),
83            tdef: TypeDef::bytes(),
84        }
85    ];
86}
vrl/stdlib/upcase.rs

vrl/stdlib/
upcase.rs
