https://github.com/coriolinus/trait-bound-pretty
https://github.com/coriolinus/trait-bound-pretty
Last synced: over 1 year ago
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- Host: GitHub
- URL: https://github.com/coriolinus/trait-bound-pretty
- Owner: coriolinus
- License: mit
- Created: 2020-10-12T15:38:05.000Z (almost 6 years ago)
- Default Branch: master
- Last Pushed: 2020-10-13T12:23:41.000Z (almost 6 years ago)
- Last Synced: 2025-02-01T04:16:20.642Z (over 1 year ago)
- Language: Rust
- Size: 18.6 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# `trait-bound-pretty`
Occasionally, rust hands you errors like this:
```text
error[E0277]: the trait bound `Arc, OpaqueExtrinsic>>, LocalCallExecutor, OpaqueExtrinsic>>, NativeExecutor>, sp_runtime::generic::Block, OpaqueExtrinsic>, RuntimeApi>>: HeaderBackend, OpaqueExtrinsic>>` is not satisfied
```
This is hard for humans to read. It's somewhat easier if we unpack it into a tree structure:
```text
error[E0277]: the item:
Arc<
sc_service::client::Client<
sc_client_db::Backend<
sp_runtime::generic::Block<
sp_runtime::generic::Header<
u32,
BlakeTwo256
>,
OpaqueExtrinsic
>
>,
LocalCallExecutor<
sc_client_db::Backend<
sp_runtime::generic::Block<
sp_runtime::generic::Header<
u32,
BlakeTwo256
>,
OpaqueExtrinsic
>
>,
NativeExecutor<
Executor
>
>,
sp_runtime::generic::Block<
sp_runtime::generic::Header<
u32,
BlakeTwo256
>,
OpaqueExtrinsic
>,
RuntimeApi
>
>
does not satisfy the trait bound:
HeaderBackend<
sp_runtime::generic::Block<
sp_runtime::generic::Header<
u32,
BlakeTwo256
>,
OpaqueExtrinsic
>
>
```
That's what this does.
## Usage
This executable is a line-oriented stream editor, meaning that you can just feed data through it.
If it sees a line which can be parsed as an E0277 or as a type name, it will pretty-print it.
Otherwise, it just passes the data through unchanged.
### Example: check the current project, expanding E0277
```bash
cargo check 2> >(trait-bound-pretty)
```
### Usage Documentation
```text
USAGE:
trait-bound-pretty [FLAGS]
FLAGS:
-b, --bare-item
Attempt to parse and print bare items instead of E0277 lines
-f, --fail-fast
If any parse error is produced, abort instead of continuing at the next line
-h, --help
Prints help information
-s, --strict
Activate strict mode
Normally, any line of input which can't be parsed is passed through unchanged. In strict mode, any line of
input which can't be parsed as an E0277 or a Rust type produces an error.
-V, --version
Prints version information
```