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
57
58
59
60
61
62
63
64
65
66

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 `Debug` trait.
pub fn handle_debug(info: &DeriveInfo, stable_ptr: SyntaxStablePtrId, result: &mut DeriveResult) {
    let header = info.format_impl_header("core::fmt", "Debug", &["core::fmt::Debug"]);
    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 {{
                    {}
                }}",
                indent_by(4,
                variants.iter().map(|variant|
                    formatdoc!(
                        "
                            {ty}::{variant}(x) => {{
                                write!(f, \"{ty}::{variant}(\")?;
                                core::fmt::Debug::fmt(x, ref f)?;
                                write!(f, \")\")
                            }},
                        ",
                        ty=info.name,
                        variant=variant.name,
                    )).join("\n"))}
            }
            TypeVariantInfo::Struct(members) => {
                formatdoc!(
                    "
                        write!(f, \"{name} {{{{\")?;{}
                        write!(f, \" }}}}\")",
                    members
                        .iter()
                        .map(|member| formatdoc!(
                            "

                                write!(f, \" {member}: \")?;
                                core::fmt::Debug::fmt(self.{member}, ref f)?;",
                            member = member.name
                        ))
                        .join("\nwrite!(f, \",\")?;"),
                )
            }
            TypeVariantInfo::Extern => {
                result.diagnostics.push(unsupported_for_extern_diagnostic(stable_ptr));
                return;
            }
        },
    );
    result.impls.push(formatdoc! {"
        {header} {{
            fn fmt(self: @{full_typename}, ref f: core::fmt::Formatter) -> core::result::Result::<(), core::fmt::Error> {{
                {body}
            }}
        }}
    "});
}