Parse and lower let-else statements
#3468
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P-E-P
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Mar 11, 2025
CohenArthur
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gcc/rust/ChangeLog: * ast/rust-stmt.h (class LetStmt): Add optional expression for diverging else. * ast/rust-ast-builder.cc (Builder::let): Use new API.
CohenArthur
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gcc/rust/ChangeLog: * parse/rust-parse-impl.h (Parser::parse_let_stmt): Add new parsing in case of `else` token.
gcc/rust/ChangeLog: * ast/rust-ast-collector.cc (TokenCollector::visit): Add handling for diverging else expression.
gcc/rust/ChangeLog: * resolve/rust-ast-resolve-stmt.h: Add handling for diverging else. * resolve/rust-late-name-resolver-2.0.cc (Late::visit): Likewise.
gcc/rust/ChangeLog: * hir/tree/rust-hir-stmt.h (class LetStmt): Add optional diverging else expression. * hir/tree/rust-hir-stmt.cc: Likewise. * hir/rust-ast-lower-stmt.cc (ASTLoweringStmt::visit): Add handling for lowering diverging else.
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Fixes #3459
Fixes #3460