gccrs: fnptr types can hold onto generic params so it needs to handle substs #4179
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… substs This patch adds support to recursively walk fnptr types to do generic substitutions. Fixes #4090 gcc/rust/ChangeLog: * typecheck/rust-substitution-mapper.cc (SubstMapperInternal::visit): handle fnptr * typecheck/rust-tyty.cc (FnPtr::handle_substitions): new * typecheck/rust-tyty.h: likewise gcc/testsuite/ChangeLog: * rust/compile/issue-4090-1.rs: New test. * rust/compile/issue-4090-2.rs: New test. Signed-off-by: Philip Herron <herron.philip@googlemail.com>
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This patch adds support to recursively walk fnptr types to do generic substitutions.
Fixes #4090
gcc/rust/ChangeLog:
gcc/testsuite/ChangeLog: