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Suggestion for StringBuffer [message #44904]

Mon, 20 July 2015 00:50

rxantos
Messages: 73
Registered: October 2011

Member

Could it be possible to Add

void  Set(const String& s);
StringBuffer(const String& s){ Zero(); Set(s);}

to StringBuffer in uppsrc/Core/String.h
and

void StringBuffer::Set(const String& s)
{
	int len = s.GetLength();
	if(0 < len) {
		SetLength(len);
		memcpy(begin, s.Begin(), len);
	} else {
		Zero();
	}
}

in uppsrc/Core/String.cpp

Sometimes I need top create a string buffer from a constant string to edit in a copy without affecting the original.

[Updated on: Mon, 20 July 2015 00:52]

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Re: Suggestion for StringBuffer [message #45084 is a reply to message #44904]

Sat, 29 August 2015 07:36

mirek
Messages: 14261
Registered: November 2005

Ultimate Member

Hi,

after carefully considering this, I tentatively decided it is not a good idea:

a) by adding StringBuffer(const String& s) the action that is going to happen would be quite strangely defined. Consider

void Fn(const String& p) { StringBuffer b(p); }

void Fn(String p) { StringBuffer b(p); }

I would say this would be a great source of accidental errors...

b) Set is in function almost identical to Cat

So, if you need to assign data now, you can use

String s;
StringBuffer b;
b.Cat(s);

I think this is sufficient.

Anyway, all of this is not final. But if I could be convinced we need anything new here, I would rather use

StringBuffer(const String& s, int); // standard way of saying 'deep copy'
void Set(const String& s) { Clear(); Cat(s); } // simpler implementation

Mirek

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