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Sometimes, nested lambdas of templated functions get no code generation due to them being marked as instantianted outside of all modules being compiled in the current compilation unit. This despite enclosing template instances being marked as instantiated inside the current compilation unit. To fix, all enclosing templates are now checked in `function_defined_in_root_p'. Because of this change, `function_needs_inline_definition_p' has also been fixed up to only check whether the regular function definition itself is to be emitted in the current compilation unit. PR d/108055 gcc/d/ChangeLog: * decl.cc (function_defined_in_root_p): Check all enclosing template instances for definition in a root module. (function_needs_inline_definition_p): Replace call to function_defined_in_root_p with test for outer module `isRoot'. gcc/testsuite/ChangeLog: * gdc.dg/torture/imports/pr108055conv.d: New. * gdc.dg/torture/imports/pr108055spec.d: New. * gdc.dg/torture/imports/pr108055write.d: New. * gdc.dg/torture/pr108055.d: New test.
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