[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [avr-gcc-list] string initialization using "" and { }

From: Graham Davies
Subject: Re: [avr-gcc-list] string initialization using "" and { }
Date: Wed, 27 May 2009 10:12:34 -0400

Zoran Rilak wrote:
 I can't find an explanation ... why
there should be a difference in the
generated code for string vs.
array-of-chars initializers.

If you declare a string and then use it as an initializer for an array of characters, the compiler will arrange for the string to be stored somewhere and then copy it to the array to perform the initialization. Should you need the string "abd" elsewhere in your program, the same copy might be used. None of this applies to initializing each element of the array separately. The compiler is at liberty to generate code that uses literals, which is more efficient. The initializer values are not available for reuse elsewhere.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]