protobuf_parse/
case_convert.rs

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1// copy-paste from Google Protobuf
2// must be kept in sync with Google for JSON interop
3#[doc(hidden)]
4pub fn camel_case(input: &str) -> String {
5    let mut capitalize_next = true;
6    let mut result = String::new();
7    result.reserve(input.len());
8
9    for c in input.chars() {
10        if c == '_' {
11            capitalize_next = true;
12        } else if capitalize_next {
13            result.push(c.to_ascii_uppercase());
14            capitalize_next = false;
15        } else {
16            result.push(c);
17        }
18    }
19
20    result
21}
22
23#[doc(hidden)]
24pub fn snake_case(input: &str) -> String {
25    let mut result = String::new();
26
27    let mut last_lower = false;
28
29    for c in input.chars() {
30        if c.is_ascii_uppercase() && last_lower {
31            result.push('_');
32        }
33        result.push(c.to_ascii_lowercase());
34        last_lower = c.is_lowercase();
35    }
36
37    result
38}
39
40#[cfg(test)]
41mod test {
42    use super::*;
43
44    #[test]
45    fn test_camel_case() {
46        assert_eq!("FooBarBazQuxQUUX", camel_case("foo_barBaz_QuxQUUX"));
47        assert_eq!("FooBarBazQuxQUUX", camel_case("Foo_barBaz_QuxQUUX"));
48    }
49
50    #[test]
51    fn test_snake_case() {
52        assert_eq!("foo_bar_baz_qux_quux", snake_case("foo_barBaz_QuxQUUX"));
53        assert_eq!("foo_bar_baz_qux_quux", snake_case("Foo_barBaz_QuxQUUX"));
54    }
55}
protobuf_parse/case_convert.rs

protobuf_parse/
case_convert.rs
