Make vespalib hash functors noexcept

Make ducktyped functor conditionally noexcept on `hash()` member function.
Follow up on `-Werror=noexcept` warnings indicating where `noexcept` can
be trivially added for such functions.

1 files changed, 2 insertions, 2 deletions

diff --git a/document/src/vespa/document/base/field.h b/document/src/vespa/document/base/field.h
index 613fcd9df1b..3a0c9b82136 100644
--- a/document/src/vespa/document/base/field.h
+++ b/document/src/vespa/document/base/field.h
@@ -97,13 +97,13 @@ public:
 
     const DataType &getDataType() const { return *_dataType; }
 
-    int getId() const { return _fieldId; }
+    int getId() const noexcept { return _fieldId; }
 
     vespalib::string toString(bool verbose=false) const;
     bool contains(const FieldSet& fields) const override;
     Type getType() const override { return Type::FIELD; }
     bool valid() const { return _fieldId != 0; }
-    uint32_t hash() const { return getId(); }
+    uint32_t hash() const noexcept { return getId(); }
 private:
     int calculateIdV7();