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Inform the user that a binding was redefined #362

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@rexim rexim commented Jun 14, 2017

Close #197

@rexim rexim self-assigned this Jun 14, 2017
@rexim rexim requested review from ForNeVeR and keddelzz June 14, 2017 16:35
@keddelzz keddelzz changed the title Infor the user that a binding was redefined Inform the user that a binding was redefined Jun 14, 2017
// 2. REPL message for the user
//
// We need to separate those meanings. The proposed idea is to
// attach some kind of side effect to ReplContext and use
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*to ReplResult

if (!context.contains(binding)) {
None
} else {
Some(s"${binding.variable} was redefined")
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*Warning: ${binding.variable} was redefined

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