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Add support for compound assignment and increment (#2526)

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Add support for user-defined assignment, as well as compound assignment and increment, following the design direction in pending proposal #2511.

Some of this isn't fully testable yet: because explorer doesn't properly support `impl` specialization, the blanket `impl`s in the prelude prevent types from customizing assignment.
This commit is contained in:
Richard Smith
2023-01-20 18:48:13 -08:00
committed by GitHub
parent f1a0645551
commit 2fd7e2b65d
32 changed files with 975 additions and 215 deletions
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explorer/interpreter/resolve_names.cpp
+5
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@@ -380,6 +380,11 @@ static auto ResolveNames(Statement& statement, StaticScope& enclosing_scope)
CARBON_RETURN_IF_ERROR(ResolveNames(assign.rhs(), enclosing_scope));
break;
}
case StatementKind::IncrementDecrement: {
auto& inc_dec = cast<IncrementDecrement>(statement);
CARBON_RETURN_IF_ERROR(ResolveNames(inc_dec.argument(), enclosing_scope));
break;
}
case StatementKind::VariableDefinition: {
auto& def = cast<VariableDefinition>(statement);
if (def.has_init()) {