Issue 1066 (#1080)
Implemented `as<T>()` and `is<T>()` with accompanying tests
diff --git a/include/json/value.h b/include/json/value.h
index d0af711..bf4f9c4 100644
--- a/include/json/value.h
+++ b/include/json/value.h
@@ -412,6 +412,10 @@
bool isArray() const;
bool isObject() const;
+ /// The `as<T>` and `is<T>` member function templates and specializations.
+ template <typename T> T as() const = delete;
+ template <typename T> bool is() const = delete;
+
bool isConvertibleTo(ValueType other) const;
/// Number of values in array or object
@@ -673,6 +677,41 @@
ptrdiff_t limit_;
};
+template <> inline bool Value::as<bool>() const { return asBool(); }
+template <> inline bool Value::is<bool>() const { return isBool(); }
+
+template <> inline Int Value::as<Int>() const { return asInt(); }
+template <> inline bool Value::is<Int>() const { return isInt(); }
+
+template <> inline UInt Value::as<UInt>() const { return asUInt(); }
+template <> inline bool Value::is<UInt>() const { return isUInt(); }
+
+#if defined(JSON_HAS_INT64)
+template <> inline Int64 Value::as<Int64>() const { return asInt64(); }
+template <> inline bool Value::is<Int64>() const { return isInt64(); }
+
+template <> inline UInt64 Value::as<UInt64>() const { return asUInt64(); }
+template <> inline bool Value::is<UInt64>() const { return isUInt64(); }
+#endif
+
+template <> inline double Value::as<double>() const { return asDouble(); }
+template <> inline bool Value::is<double>() const { return isDouble(); }
+
+template <> inline String Value::as<String>() const { return asString(); }
+template <> inline bool Value::is<String>() const { return isString(); }
+
+/// These `as` specializations are type conversions, and do not have a
+/// corresponding `is`.
+template <> inline float Value::as<float>() const { return asFloat(); }
+template <> inline const char* Value::as<const char*>() const {
+ return asCString();
+}
+#ifdef JSON_USE_CPPTL
+template <> inline CppTL::ConstString Value::as<CppTL::ConstString>() const {
+ return asConstString();
+}
+#endif
+
/** \brief Experimental and untested: represents an element of the "path" to
* access a node.
*/