WIP: add a Val struct as an input/output when calling a function

src/env.h

@@ -39,6 +39,7 @@
 #include <vector>
 #include <map>
 #include "item.h"
+#include "val.h"
 #include "textstream/stream.h"
 
 
@@ -49,27 +50,27 @@ namespace Ezc
 /*
 	a variable
 */
-struct Var
-{
-	/*
-	 * if true then means 'str' is a function name and should be called (res is ignored)
-	 *
-	 * if false then means 'str' is a string value and res is a boolean value
-	 */
-	bool is_function;
+// struct Var
+// {
+// 	/*
+// 	 * if true then means 'str' is a function name and should be called (res is ignored)
+// 	 *
+// 	 * if false then means 'str' is a string value and res is a boolean value
+// 	 */
+// 	bool is_function;
 
-	std::wstring str;	// a string value
-	bool res;			// a boolean value
+// 	std::wstring str;	// a string value
+// 	bool res;			// a boolean value
 
-	Var()
-	{
-		res = false;
-		is_function = false;
-	}
-};
+// 	Var()
+// 	{
+// 		res = false;
+// 		is_function = false;
+// 	}
+// };
 
 
-typedef std::map<std::wstring, Var> Vars;
+//typedef std::map<std::wstring, Var> Vars;
 
 
 
@@ -141,25 +142,36 @@ struct Stack
 };
 
 
-// !! IMPROVE ME
-// the name is bad
-// may it should be called Env (environment) or FunEnv
+
 struct Env
 {
-	// a result consists of a string and a boolean value
-	// output stream
-	pt::Stream & out;
-	// return value from a user's function (default false if not set directly by the function)
-	bool res;
-
 	// table of parameters
 	// the table can be empty
-	std::vector<Var> & params;
+	std::vector<Val> & params;
+
+	// output
+	Val & res;
+
+	//
+	// old interface but still available
+	//
+
+	// a result consists of a string and a boolean value
+	// output stream
+	pt::Stream & out; // OLD INTERFACE a reference to res.stream
+	// return value from a user's function (default false if not set directly by the function)
+	//bool res;
+
+	// old interface DEPRECATED
 
 	// the first parameter
 	// you can always use it even if there are not any parameters (params is empty)
 	// in such a way the reference points to an empty string
-	const std::wstring & par;
+	//const std::wstring & par;
+
+
+	//
+
 
 	// an input stream used in [filter] statement
 	// if there is other statement than [filter] then this is an empty stream
@@ -208,11 +220,11 @@ struct Env
 
 	// arguments: output_stream, table_of_parameters, the_first_parameter
 	Env(pt::Stream & o,
-			std::vector<Var> & pars,
-			const std::wstring & first_par,
-			const pt::Stream & input_stream,
-			Stack & s,
-			const Item & item_) : out(o), params(pars), par(first_par), in(input_stream), stack(s), item(item_)
+		std::vector<Val> & pars,
+		Val & res,
+		const pt::Stream & input_stream,
+		Stack & s,
+		const Item & item_) : out(o), params(pars), res(res), in(input_stream), stack(s), item(item_)
 	{
 		Clear();
 	}

src/val.h

@@ -0,0 +1,252 @@
+/*
+ * This file is a part of EZC -- Easy templating in C++ library
+ * and is distributed under the 2-Clause BSD licence.
+ * Author: Tomasz Sowa <t.sowa@ttmath.org>
+ */
+
+/*
+ * Copyright (c) 2024, Tomasz Sowa
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef headerfile_ezc_val
+#define headerfile_ezc_val
+
+#include "spacewrapper.h"
+#include "date/date.h"
+#include "item.h"
+#include "modelcontainerwrapper.h"
+#include "textstream/textstream.h"
+
+
+namespace morm
+{
+class Model;
+}
+
+
+
+
+namespace Ezc
+{
+
+
+struct Env;
+
+
+/*
+
+*/
+class Val
+{
+public:
+
+	typedef void (*UserFunction)(Env &);
+
+	enum Type
+	{
+		TYPE_VOID,
+		TYPE_SPACE_LOCAL,
+		TYPE_STREAM,
+		TYPE_FUNCTION,
+		TYPE_DATE,
+		TYPE_MODEL,
+		TYPE_MODEL_CONTAINER_WRAPPER,
+		TYPE_SPACE_WRAPPER,
+		TYPE_SPACE,
+		TYPE_OUTPUT_STREAM,
+		TYPE_ITEM_BLOCK,
+	};
+
+
+	Val();
+	Val(pt::Stream * output_stream);
+	Val(const Val & val);
+	Val & operator=(const Val & val);
+	~Val();
+	// IMPROVEME add move cctor and operator=
+
+	void set_output_stream(pt::Stream * output_stream);
+	void set_output_stream(pt::Stream & output_stream);
+
+	Val * add_child(const std::wstring & child_name, const Val & val);
+	Val * find_child(const std::wstring & child_name);
+
+	bool has_object();
+	bool has_model_object();
+
+	void clear();
+	void clear_childs();
+
+
+	bool to_bool() const;
+
+
+	void set(const char * str);
+	void set(const wchar_t * str);
+	void set(const std::string & str);
+	void set(const std::wstring & str);
+
+	void set(bool val);
+	void set(short val);
+	void set(int val);
+	void set(long val);
+	void set(long long val);
+	void set(unsigned short val);
+	void set(unsigned int val);
+	void set(unsigned long val);
+	void set(unsigned long long val);
+
+	void set(float val);
+	void set(double val);
+	void set(long double val);
+
+	void set(pt::Stream & str);
+
+	void set(UserFunction user_function);
+
+	void set(pt::Date & date);
+
+	void set(morm::Model & model);
+
+	void set(morm::ModelContainerWrapper & model_container_wrapper);
+
+	template<typename ModelType>
+	void set(std::vector<ModelType> & model_container);
+
+	template<typename ModelType>
+	void set(std::list<ModelType> & model_container);
+
+	template<typename ModelType>
+	void set(std::vector<ModelType*> & model_container);
+
+	template<typename ModelType>
+	void set(std::list<ModelType*> & model_container);
+
+	void set(morm::SpaceWrapper & space_wrapper);
+	void set(pt::Space & space, bool create_wrapper = true);
+
+	void set(Val & val);
+	void set(Item & item_block);
+
+	// bool is_equal(const char * str) const;
+	// bool is_equal(const wchar_t * str) const;
+
+	// bool is_equal(const std::string & str) const;
+	// bool is_equal(const std::wstring & str) const;
+
+	void serialize_to(pt::Stream & str);
+
+
+	Val & operator<<(const char * str);
+	Val & operator<<(const wchar_t * str);
+	Val & operator<<(const std::string & str);
+	Val & operator<<(const std::wstring & str);
+	Val & operator<<(char val);
+	Val & operator<<(unsigned char val);
+	Val & operator<<(wchar_t val);
+	Val & operator<<(bool val);
+	Val & operator<<(short val);
+	Val & operator<<(int val);
+	Val & operator<<(long val);
+	Val & operator<<(long long val);
+	Val & operator<<(unsigned short val);
+	Val & operator<<(unsigned int val);
+	Val & operator<<(unsigned long val);
+	Val & operator<<(unsigned long long val);
+	Val & operator<<(float val);
+	Val & operator<<(double val);
+	Val & operator<<(long double val);
+	Val & operator<<(const pt::Stream & str);
+
+	Val & operator=(bool res);
+
+
+	Type type;
+	pt::Space space_local;
+
+	UserFunction user_function;
+
+	// Wrapper
+	morm::Model * model;
+	morm::ModelContainerWrapper * model_container_wrapper;
+	pt::Date * date;
+	morm::SpaceWrapper * space_wrapper;
+	//
+
+	pt::Space * space;
+	pt::Stream * stream;
+
+	Item * item_block;
+
+
+
+	// output stream
+	pt::Stream * output_stream;
+	size_t output_stream_original_size;
+
+private:
+
+
+	std::map<std::wstring, Val> childs_map;
+
+	void initialize_empty();
+	void copy(const Val & val);
+
+	// bool is_equal_bool(const char * str) const;
+	// bool is_equal_string(const char * str) const;
+
+	// bool is_equal_bool(const wchar_t * str) const;
+	// bool is_equal_string(const wchar_t * str) const;
+
+	void assert_type_output_stream();
+
+
+	/*
+	 * old
+	 */
+
+
+	/*
+	 * if true then means 'str' is a function name and should be called (res is ignored)
+	 *
+	 * if false then means 'str' is a string value and res is a boolean value
+	 */
+	//bool is_function;
+
+	//std::wstring str;	// a string value
+	//bool res;			// a boolean value
+
+};
+
+
+typedef std::map<std::wstring, Val> Vals;
+
+
+} // namespace Ezc
+
+#endif
+