megamove

src/SqlLexer.h

@@ -0,0 +1,43 @@
+#ifndef SQLLEXER_H
+#define SQLLEXER_H
+
+#include <QString>
+
+enum class BasicTokenType {
+	None,
+	End, // End of input
+	Symbol, // can be many things, keyword, object name, operator, ..
+	Comment,
+	QuotedString,
+	DollarQuotedString,
+	QuotedIdentifier
+};
+
+enum class LexerState {
+	Null,
+	InDollarQuotedString
+};
+
+
+class SqlLexer {
+public:
+	SqlLexer(const QString &block, LexerState currentstate);
+	QChar nextChar();
+	QChar peekChar();
+	/**
+	 * @brief NextBasicToken
+	 * @param in
+	 * @param ofs
+	 * @param start
+	 * @param length
+	 * @return false when input seems invalid, it will return what it did recognize but something wasn't right, parser should try to recover
+	 */
+	bool nextBasicToken(int &startpos, int &length, BasicTokenType &tokentype, QString &out);
+
+private:
+	QString m_block;
+	int m_pos = 0;
+	LexerState m_state;
+};
+
+#endif // SQLLEXER_H