44c769f7b9
# Objective
- Better error message
- More idiomatic code
## Solution
Refactorize `TypeUuid` macros to use `syn::Result` instead of panic.
## Before/After error messages
### Missing `#[uuid]` attribtue
#### Before
```
error: proc-macro derive panicked
--> src\main.rs:1:10
|
1 | #[derive(TypeUuid)]
| ^^^^^^^^
|
= help: message: No `#[uuid = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"` attribute found.
```
#### After
```
error: No `#[uuid = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"]` attribute found.
--> src\main.rs:3:10
|
3 | #[derive(TypeUuid)]
| ^^^^^^^^
|
= note: this error originates in the derive macro `TypeUuid` (in Nightly builds, run with -Z macro-backtrace for more info)
```
### Malformed attribute
#### Before
```
error: proc-macro derive panicked
--> src\main.rs:3:10
|
3 | #[derive(TypeUuid)]
| ^^^^^^^^
|
= help: message: `uuid` attribute must take the form `#[uuid = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"`.
```
#### After
```
error: `uuid` attribute must take the form `#[uuid = "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"]`.
--> src\main.rs:4:1
|
4 | #[uuid = 42]
| ^^^^^^^^^^^^
```
### UUID parse fail
#### Before
```
error: proc-macro derive panicked
--> src\main.rs:3:10
|
3 | #[derive(TypeUuid)]
| ^^^^^^^^
|
= help: message: Value specified to `#[uuid]` attribute is not a valid UUID.: Error(SimpleLength { len: 3 })
```
#### After
```
error: Invalid UUID: invalid length: expected length 32 for simple format, found 3
--> src\main.rs:4:10
|
4 | #[uuid = "000"]
| ^^^^^
```
### With [Error
Lens](https://marketplace.visualstudio.com/items?itemName=usernamehw.errorlens)
#### Before
#### After
---
## Changelog
- `#[derive(TypeUuid)]` provide better error messages.
|
||
|---|---|---|
| .. | ||
| impls | ||
| container_attributes.rs | ||
| derive_data.rs | ||
| documentation.rs | ||
| enum_utility.rs | ||
| field_attributes.rs | ||
| from_reflect.rs | ||
| lib.rs | ||
| reflect_value.rs | ||
| registration.rs | ||
| trait_reflection.rs | ||
| type_path.rs | ||
| type_uuid.rs | ||
| utility.rs | ||