Util: Add GenericLexer class

2022-07-20 22:49:41 +02:00
parent 4e6c5ca341
commit 4ce026ec78
2 changed files with 98 additions and 0 deletions
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#ifndef UTIL_GENERIC_LEXER_H
+#define UTIL_GENERIC_LEXER_H
+
+#include <cassert> // assert
+#include <cstddef> // size_t
+#include <string_view>
+
+namespace Util {
+
+class GenericLexer {
+public:
+	GenericLexer(std::string_view input);
+	virtual ~GenericLexer();
+
+	// Position
+
+	size_t tell() const;
+	bool isEOF() const;
+
+	// Access
+
+	char peek(size_t offset = 0) const;
+
+	// Modifiers
+
+	void ignore(size_t count = 1);
+	void retreat(size_t count = 1);
+	char consume();
+
+protected:
+	size_t m_index { 0 };
+	std::string_view m_input;
+};
+
+} // namespace Util
+
+#endif // UTIL_GENERIC_LEXER_H