Meta: Improve project when used as a dependency

src/blaze/ast.h

@@ -11,16 +11,18 @@
 #include <functional> // std::function
 #include <list>
 #include <map>
-#include <memory> // std::shared_ptr
+#include <memory> // std::make_shared, std::shared_ptr
 #include <span>
 #include <string>
 #include <string_view>
 #include <typeinfo> // typeid
+#include <utility>  // std::forward
 #include <vector>
 
 #include "ruc/format/formatter.h"
 
 #include "blaze/forward.h"
+#include "blaze/to-from-hashmap.h"
 
 namespace blaze {
 
@@ -77,13 +79,12 @@ protected:
 #define WITH_META(Type)                                         \
 	virtual ValuePtr withMetaImpl(ValuePtr meta) const override \
 	{                                                           \
-		return makePtr<Type>(*this, meta);                      \
+		return std::make_shared<Type>(*this, meta);             \
 	}
 
 #define WITH_NO_META()                                     \
-	virtual ValuePtr withMetaImpl(ValuePtr meta) const override \
+	virtual ValuePtr withMetaImpl(ValuePtr) const override \
 	{                                                      \
-		(void)meta;                                             \
 		return nullptr;                                    \
 	}
 
@@ -195,6 +196,20 @@ public:
 	HashMap(const HashMap& that, ValuePtr meta);
 	virtual ~HashMap() = default;
 
+	static HashMapPtr create(const Elements& elements)
+	{
+		return std::make_shared<HashMap>(elements);
+	}
+
+	// Customization Point
+	template<typename T>
+	static HashMapPtr create(T value)
+	{
+		HashMapPtr hash_map;
+		to_hash_map(hash_map, std::forward<T>(value));
+		return hash_map;
+	}
+
 	static std::string getKeyString(ValuePtr key);
 
 	bool exists(const std::string& key);
@@ -222,6 +237,11 @@ public:
 	String(char character);
 	virtual ~String() = default;
 
+	static ValuePtr create(const std::string& data)
+	{
+		return std::make_shared<String>(data);
+	}
+
 	const std::string& data() const { return m_data; }
 	size_t size() const { return m_data.size(); }
 	bool empty() const { return m_data.empty(); }
@@ -287,6 +307,11 @@ public:
 	Decimal(double decimal);
 	virtual ~Decimal() = default;
 
+	static ValuePtr create(float value)
+	{
+		return std::make_shared<Decimal>(value);
+	}
+
 	double decimal() const { return m_decimal; }
 
 	WITH_NO_META();

src/blaze/env/macro.h

@@ -6,15 +6,17 @@
 
 #pragma once
 
+#include <iterator> // std::distance
 #include <unordered_map>
 
 #include "blaze/env/environment.h"
+#include "blaze/forward.h"
 
 #define ADD_FUNCTION(name, signature, documentation, lambda) \
-	Environment::registerFunction(                           \
+	blaze::Environment::registerFunction(                    \
 		{ name,                                              \
 	      signature,                                         \
 	      documentation,                                     \
-	      [](ValueVectorConstIt begin, ValueVectorConstIt end) -> blaze::ValuePtr lambda });
+	      [](blaze::ValueVectorConstIt begin, blaze::ValueVectorConstIt end) -> blaze::ValuePtr lambda });
 
 #define SIZE() std::distance(begin, end)

src/blaze/forward.h

@@ -15,7 +15,9 @@ namespace blaze {
 // Types
 
 class Value;
+class HashMap;
 typedef std::shared_ptr<Value> ValuePtr;
+typedef std::shared_ptr<HashMap> HashMapPtr;
 typedef std::vector<ValuePtr> ValueVector;
 typedef ValueVector::iterator ValueVectorIt;
 typedef ValueVector::reverse_iterator ValueVectorReverseIt;

src/blaze/to-from-hashmap.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2023 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include <utility> // std::forward
+
+#include "ruc/meta/odr.h"
+
+namespace blaze {
+
+namespace detail {
+
+// struct hashMapConstructor {
+// 	template<typename HashMap>
+// 	static void construct(HashMap& hash_map, bool boolean)
+// 	{
+// 		//..
+// 	}
+// };
+
+// template<typename HashMap, typename T>
+// void toHashMap(HashMap& hash_map, const T& value)
+// {
+// 	hashMapConstructor::construct(hash_map, value);
+// }
+
+struct toHashMapFunction {
+	template<typename HashMapPtr, typename T>
+	auto operator()(HashMapPtr& hash_map, T&& value) const
+	{
+		return to_hash_map(hash_map, std::forward<T>(value));
+	}
+};
+
+} // namespace detail
+
+// Anonymous namespace prevents multiple definition of the reference
+namespace {
+// Function object
+constexpr const auto& to_hash_map = ruc::detail::staticConst<detail::toHashMapFunction>; // NOLINT(misc-definitions-in-headers,clang-diagnostic-unused-variable)
+} // namespace
+
+} // namespace blaze
+
+// Customization Points
+// https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4381.html
+
+// blaze::to_hash_map is a function object, the type of which is
+// blaze::detail::toHashMapFunction. In the blaze::detail namespace are the to_hash_map
+// free functions. The function call operator of toHashMapFunction makes an
+// unqualified call to to_hash_map which, since it shares the detail namespace with
+// the to_hash_map free functions, will consider those in addition to any overloads
+// that are found by argument-dependent lookup.
+
+// Variable templates are linked externally, therefor every translation unit
+// will see the same address for detail::staticConst<detail::toHashMapFunction>.
+// Since blaze::to_hash_map is a reference to the variable template, it too will have
+// the same address in all translation units.

src/blaze/util.h

@@ -36,7 +36,7 @@
 
 #define CHECK_ARG_COUNT_IS_IMPL(name, size, expected, result)                               \
 	if (size != expected) {                                                                 \
-		Error::the().add(::format("wrong number of arguments: {}, {}", name, size)); \
+		blaze::Error::the().add(::format("wrong number of arguments: {}, {}", name, size)); \
 		return result;                                                                      \
 	}
 
@@ -54,7 +54,7 @@
 
 #define CHECK_ARG_COUNT_AT_LEAST_IMPL(name, size, min, result)                              \
 	if (size < min) {                                                                       \
-		Error::the().add(::format("wrong number of arguments: {}, {}", name, size)); \
+		blaze::Error::the().add(::format("wrong number of arguments: {}, {}", name, size)); \
 		return result;                                                                      \
 	}
 
@@ -72,7 +72,7 @@
 
 #define CHECK_ARG_COUNT_BETWEEN_IMPL(name, size, min, max, result)                          \
 	if (size < min || size > max) {                                                         \
-		Error::the().add(::format("wrong number of arguments: {}, {}", name, size)); \
+		blaze::Error::the().add(::format("wrong number of arguments: {}, {}", name, size)); \
 		return result;                                                                      \
 	}
 
@@ -90,7 +90,7 @@
 
 #define CHECK_ARG_COUNT_EVEN_IMPL(name, size, result)                                       \
 	if (size % 2 != 0) {                                                                    \
-		Error::the().add(::format("wrong number of arguments: {}, {}", name, size)); \
+		blaze::Error::the().add(::format("wrong number of arguments: {}, {}", name, size)); \
 		return result;                                                                      \
 	}
 
@@ -108,7 +108,7 @@
 
 #define IS_VALUE_IMPL(type, value, result)                                              \
 	if (!is<type>(value.get())) {                                                       \
-		Error::the().add(::format("wrong argument type: {}, {}", #type, value)); \
+		blaze::Error::the().add(::format("wrong argument type: {}, {}", #type, value)); \
 		return result;                                                                  \
 	}