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Don't suggest removing variable when it's bound in a branch pattern

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Instead, suggest prefixing it with an underscore, or replacing with an
underscore.

Closes #3820
This commit is contained in:
Ayaz Hafiz 2022-08-17 11:53:01 -05:00
parent 34c3f266e0
commit b30c90b500
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4 changed files with 47 additions and 4 deletions
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crates/compiler/can/src/expr.rs
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@ -1414,7 +1414,7 @@ fn canonicalize_when_branch<'a>(
if output.references.has_value_lookup(symbol) {
pattern_bound_symbols_body_needs.insert(symbol);
} else {
env.problem(Problem::UnusedDef(symbol, region));
env.problem(Problem::UnusedBranchDef(symbol, region));
}
}