I have a string& parameter, and i want to assign it to string parameter.
How can it be done.
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6Post some code that illustrates what you are asking about.anon– anon2010-06-18 12:05:35 +00:00Commented Jun 18, 2010 at 12:05
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1Do you mean like a function void f(string& a, string b) within which the value of b is assigned to a? Or are you talking about something like string * b as the second parameter, to access that outside f()? Please be clear and supply us with some code.Deep-B– Deep-B2010-06-18 12:13:26 +00:00Commented Jun 18, 2010 at 12:13
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3 Answers
void f(string ¶m);
string myString = "something";
f(myString)
Is that what you need?
answered Jun 18, 2010 at 12:07
Pavel Radzivilovsky
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Comments
Generally speaking, string& or even const string& is just a name alias and if you have it somewhere in your code, it's equal to
// This means you just create a new ALIAS named "aliased_string"
// for REAL "real_string"
string& aliased_string = real_string;
Now, whenever you make something with your aliased_string, the changes are done directly with your real_string.
Hence, assigning becomes very simple:
// Create a new string
string constructed_string;
// Means the same as "constructed_string = real_string"
constructed_string = aliased_string;
Note, that if you have some function with reference in it's parameter list, the logic remains the same:
void foo (string& aliased_string) { ... }
generally means the same as
void foo () { string& aliased_string = real_string }
where real_string is passed as a parameter.
Comments
If you mean reassigning a string reference then it cannot be done
string &stringref = a_string;
stringref = &b_string; // Cannot be done
