lisette_diagnostics/
embed.rs

1use crate::LisetteDiagnostic;
2use syntax::ast::Span;
3
4pub fn defined_type(target: &str, span: Span) -> LisetteDiagnostic {
5    LisetteDiagnostic::error("Cannot embed this type")
6        .with_infer_code("embed_defined_type")
7        .with_span_label(&span, "not embeddable in this version")
8        .with_help(format!(
9            "Embedding `{}` is not supported in this version. Embed a record struct, an \
10             interface, or a pointer to one.",
11            target
12        ))
13}
14
15pub fn generic(target: &str, span: Span) -> LisetteDiagnostic {
16    LisetteDiagnostic::error("Cannot embed a generic type")
17        .with_infer_code("embed_generic")
18        .with_span_label(&span, "generic type")
19        .with_help(format!(
20            "Embedding `{}` is not supported in this version. Embed a non-generic struct, \
21             interface, or pointer.",
22            target
23        ))
24}
25
26pub fn imported_target(target: &str, span: Span) -> LisetteDiagnostic {
27    LisetteDiagnostic::error("Cannot embed an imported type yet")
28        .with_infer_code("embed_imported_target")
29        .with_span_label(&span, "imported embeds are not supported yet")
30        .with_help(format!(
31            "Embedding the imported Go type `{}` is not supported yet. For now, embed a \
32             Lisette struct or interface.",
33            target
34        ))
35}
36
37pub fn no_surface(target: &str, span: Span) -> LisetteDiagnostic {
38    LisetteDiagnostic::error("Type cannot be embedded")
39        .with_infer_code("embed_no_surface")
40        .with_span_label(&span, "no methods or fields to promote")
41        .with_help(format!(
42            "`{}` has no selector surface, so embedding it would promote nothing. \
43             Embed a struct, interface, or a named type with methods, or use a named field.",
44            target
45        ))
46}
47
48pub fn pointer_to_interface(target: &str, span: Span) -> LisetteDiagnostic {
49    LisetteDiagnostic::error("Cannot embed a pointer to an interface")
50        .with_infer_code("embed_pointer_to_interface")
51        .with_span_label(&span, "pointer to an interface")
52        .with_help(format!(
53            "`{}` embeds a pointer to an interface, which Go rejects. \
54             Embed the interface by value instead.",
55            target
56        ))
57}
58
59pub fn nested_ref(target: &str, span: Span) -> LisetteDiagnostic {
60    LisetteDiagnostic::error("Cannot embed a pointer to a pointer")
61        .with_infer_code("embed_nested_ref")
62        .with_span_label(&span, "pointer to a pointer")
63        .with_help(format!(
64            "`{}` embeds a pointer to a pointer, which Go rejects. \
65             Embed `T` or `Ref<T>`.",
66            target
67        ))
68}
69
70pub fn pointer_backed_newtype(target: &str, span: Span) -> LisetteDiagnostic {
71    LisetteDiagnostic::error("Cannot embed a pointer-backed type")
72        .with_infer_code("embed_pointer_backed_newtype")
73        .with_span_label(&span, "underlying type is a pointer")
74        .with_help(format!(
75            "`{}` is a defined type whose underlying type is a pointer, which Go rejects \
76             as an embedded field. Embed `T` or `Ref<T>`.",
77            target
78        ))
79}
80
81pub fn option_target(span: Span) -> LisetteDiagnostic {
82    LisetteDiagnostic::error("Cannot embed `Option<T>`")
83        .with_infer_code("embed_option_target")
84        .with_span_label(&span, "embedded type cannot be `Option`")
85        .with_help(
86            "An embed's nullability is the embedded type's own zero, so `embed` takes no \
87             `Option`. Embed `T` (or `Ref<T>` for a pointer) instead.",
88        )
89}
lisette_diagnostics/embed.rs

lisette_diagnostics/
embed.rs
