51 lines
1.6 KiB
C++
51 lines
1.6 KiB
C++
/*
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* ITableListener.h
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*/
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#ifndef ITABLELISTENER_H_
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#define ITABLELISTENER_H_
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#include <memory>
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#include "llvm/StringRef.h"
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#include "nt_Value.h"
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class ITable;
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/**
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* A listener that listens to changes in values in a {@link ITable}
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*/
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class ITableListener {
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public:
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virtual ~ITableListener() = default;
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/**
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* Called when a key-value pair is changed in a {@link ITable}
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* @param source the table the key-value pair exists in
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* @param key the key associated with the value that changed
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* @param value the new value
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* @param isNew true if the key did not previously exist in the table,
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* otherwise it is false
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*/
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virtual void ValueChanged(ITable* source,
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llvm::StringRef key,
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std::shared_ptr<nt::Value> value,
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bool isNew) = 0;
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/**
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* Extended version of ValueChanged. Called when a key-value pair is
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* changed in a {@link ITable}. The default implementation simply calls
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* ValueChanged(). If this is overridden, ValueChanged() will not be called.
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* @param source the table the key-value pair exists in
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* @param key the key associated with the value that changed
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* @param value the new value
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* @param flags update flags; for example, NT_NOTIFY_NEW if the key did not
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* previously exist in the table
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*/
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virtual void ValueChangedEx(ITable* source,
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llvm::StringRef key,
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std::shared_ptr<nt::Value> value,
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unsigned int flags);
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};
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#endif /* ITABLELISTENER_H_ */
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