gccrs: add unused braces lint#4625
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gcc/rust/ChangeLog: * checks/lints/unused/rust-unused-checker.cc (UnusedChecker::visit): Warn on unnecessary braces around an assigned value. * rust-lang.cc (grs_langhook_init_options_struct): Enable warn_unused. gcc/testsuite/ChangeLog: * rust/compile/unused-braces_0.rs: New test. Signed-off-by: Lucas Ly Ba <lucas.ly-ba@outlook.com>
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This patch adds the unused braces lint, which warns on unnecessary braces around the value of a let binding.
gcc/testsuite/ChangeLog: