Started work on Database code

extra/testQuery.oq

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+GET UNIQUE name AS "Name", age, country, children 			# * can be used to get all columns; UNIQUE is optional
+IN test_table
+FOR ([age == 20] OR [year <= 1998]) AND 					# FOR conditions should support all regular comparison operators (==, !=, <, <=, >, >=) when applicable
+	([name == "Alberto"] OR [name MATCHES "regex"]) AND
+	[country IN {"Spain", "Italy", "Germany"}] AND
+	NOT [children BETWEEN 2,4 INCL]  						# Possible values: INCL (default, implicit), EXCL, INCL_L, INCL_R
+CROSS test_table_2 MATCH  									# Possible values: MATCH (default, implicit), LEFT, RIGHT, FULL
+IF test_table.id == test_table_2.user_id 					# Debating if this should support only equality, or more complex conditions, maybe even matching FOR conditions
+ORDER age, year DESC; 										# Possible values: ASC (default, implicit), DESC

other/test.txt

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+enum class eTokenType {
+    Keyword,      // GET, IN, FOR, CROSS, IF, ORDER, UNIQUE, AS, OR, AND, NOT,
+                  // IN, MATCHES, BETWEEN, INCL, EXCL, INCL_L, INCL_R,
+                  // MATCH, LEFT, RIGHT, FULL, ASC, DESC, NULL
+    Identifier,   // name, age, test_table.id
+    StringLit,    // "Alberto"
+    NumberLit,    // 20, 1998
+    Operator,     // == != < <= > >=
+    Symbol,       // ( ) [ ] { } , . * ;
+    EndOfInput
+};
+
+struct Token {
+    eTokenType type;
+    String value;       // raw text
+    u32 line, col;      // for error reporting — add from day one, you'll regret skipping it
+};

src/ostd/io/database/Lexer.cpp

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+/*
+	OmniaFramework - A collection of useful functionality
+	Copyright (C) 2026  OmniaX-Dev
+
+	This file is part of OmniaFramework.
+
+	OmniaFramework is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	OmniaFramework is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with OmniaFramework.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include "Lexer.hpp"
+
+namespace ostd
+{
+	namespace db
+	{
+	}
+}

src/ostd/io/database/Lexer.hpp

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+/*
+	OmniaFramework - A collection of useful functionality
+	Copyright (C) 2026  OmniaX-Dev
+
+	This file is part of OmniaFramework.
+
+	OmniaFramework is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	OmniaFramework is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with OmniaFramework.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include <ostd/string/String.hpp>
+
+namespace ostd
+{
+	namespace db
+	{
+	}
+}