rust-lang/rust-clippy
Ver no GitHublarge_enum_variant triggered in error-chain macro has unhelpful help message
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#2.121 aberto em 9 de out. de 2017
C-enhancementE-mediumT-middlegood first issue
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Description
You know how I like to suggest E-hard new lints? Sorry, this time I only have an E-hard L-enhancement to report.
warning: large size difference between variants
--> src/main.rs:66:1
|
66 | / error_chain! {
67 | | foreign_links {
68 | | Io(::std::io::Error);
69 | | Handlebars(::handlebars::TemplateRenderError);
70 | | Yaml(::yaml::Error);
71 | | }
72 | | }
| |_^
|
= note: #[warn(large_enum_variant)] on by default
= help: for further information visit https://rust-lang-nursery.github.io/rust-clippy/v0.0.165/index.html#large_enum_variant
help: consider boxing the large fields to reduce the total size of the enum
|
113| err : Box<$ foreign_link_error_path> ) {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: this error originates in a macro outside of the current crate
= issue author's remark: this help message is not helpful
Is there a way to (easily) print the enum variants with their sizes? This might be helpful even in rather obvious cases.