Added pattern guard syntax to Micro Rust #72
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- Make pattern translations total and tolerate wrapper forms to avoid Match in the bcase frontend. - Allow nested patterns in constructor args by expanding collection/translation logic in Basic_Case_Expression. - Normalize tuple patterns into Pair/TNil shape in the shallow match frontend. - Improve shallow match arg translation to distinguish bindings vs constructors and handle nested tuple patterns. - Add nested-pattern showcase/regression tests (Option/Result, tuples, wildcards, if-let and let-else forms). Closes awslabs#65. Signed-off-by: Dominic Mulligan <dominic.p.mulligan@gmail.com>
Can now use Boolean-valued pattern guards, for example:
```rust
match x with {
Some(x) if x > 0 => ...,
None => ...,
_otherwise => ...
}
```
Closes awslabs#67.
Signed-off-by: Dominic Mulligan <dominic.p.mulligan@gmail.com>
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Can now use Boolean-valued pattern guards, for example:
Closes #67.
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