cairo-lang-plugins 2.5.0-dev.1

Cairo core plugin implementations.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56

use cairo_lang_syntax::node::ids::SyntaxStablePtrId;
use indent::indent_by;
use indoc::formatdoc;
use itertools::Itertools;

use super::{unsupported_for_extern_diagnostic, DeriveInfo, DeriveResult};
use crate::plugins::derive::TypeVariantInfo;

/// Adds derive result for the `Clone` trait.
pub fn handle_clone(info: &DeriveInfo, stable_ptr: SyntaxStablePtrId, result: &mut DeriveResult) {
    let header =
        info.format_impl_header("core::clone", "Clone", &["core::clone::Clone", "Destruct"]);
    let full_typename = info.full_typename();
    let name = &info.name;
    let body = indent_by(
        8,
        match &info.specific_info {
            TypeVariantInfo::Enum(variants) => {
                formatdoc! {"
                match self {{
                    {}
                }}",
                variants.iter().map(|variant|
                    format!(
                        "{ty}::{variant}(x) => {ty}::{variant}(core::clone::Clone::clone(x)),",
                        ty=info.name,
                        variant=variant.name,
                    )).join("\n    ")}
            }
            TypeVariantInfo::Struct(members) => {
                formatdoc! {"
                {name} {{
                    {}
                }}",
                    indent_by(4, members.iter().map(|member| {
                        format!(
                            "{member}: core::clone::Clone::clone(self.{member}),",
                            member=member.name,
                        )
                    }).join("\n"))
                }
            }
            TypeVariantInfo::Extern => {
                result.diagnostics.push(unsupported_for_extern_diagnostic(stable_ptr));
                return;
            }
        },
    );
    result.impls.push(formatdoc! {"
        {header} {{
            fn clone(self: @{full_typename}) -> {full_typename} {{
                {body}
            }}
        }}
    "});
}