String Assign

String Assign-5
For example, suppose you want to assign one string to another string; that is, you want to copy the contents of one string to another.

For example, suppose you want to assign one string to another string; that is, you want to copy the contents of one string to another.

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String's implicit conversion operators let you can use these objects naturally: the result would be 14 because 2 is an integer, and C 's type conversion rules put the String object in an integer context.

You can disable the operator overloads that allow these things by defining MYSQLPP_NO_BINARY_OPERS.

Otherwise, we return the String's value wrapped in the Null Return number of bytes in the string.

Note that this doesn't count the number of characters in the string. This only copies the pointer to the other String's data buffer and increments its reference counter.

This class also has some basic information about the type of data stored in it, to allow it to do the conversions more intelligently than a trivial implementation would allow. This parallels the ctor with the same parameters, for when you must do a 2-step create, or when you want to reassign the data without creating a String temporary to get around the fact that operator=() can only take one parameter. This parallels the ctor with the same parameters, for when you must do a 2-step create, or when you want to reassign the data without creating a String temporary to get around the fact that operator=() can only take one parameter. This parallels the ctor with the same parameters, for when you must do a 2-step create, or when you want to reassign the data without creating a String temporary to get around the fact that operator=() can only take one parameter.

If the String object was initialized with some string we recognize as a SQL null, we just return a copy of the global 'null' object converted to the requested type.

Strings in C are intertwined with pointers to a large extent.

You must become familiar with the pointer concepts covered in the previous articles to use C strings effectively.

The only exception is in dealing with BLOB data, which stays in String form for efficiency and to avoid corrupting the data with facile conversions.

Even then, it's best to use it through the typedef aliases like sql_blob in sql_types.h, in case we later change this underlying representation.

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