All Questions
Tagged with lvalue-to-rvalue lvalue
10 questions
0
votes
5
answers
2k
views
Why do we need the address-of operator (ampersand, &) when passing a variable to scanf, but not when assigning to it?
When using the scanf function, we cannot simply specify the variable name. Rather, we have to prefix the variable name with an ampersand, e.g. int a; printf("enter your value"); scanf("...
- 25
2
votes
1
answer
1k
views
C++ pass vector (lvalue to rvalue)
Lets say you have 2 vectors passed to a function as lvalue references. Later you realize, you can use recursion and pass slices of these vectors using their iterators.
Would it be an appropriate ...
- 511
-1
votes
2
answers
823
views
error: invalid initialization of non-const reference of type 'std::function<void()>&' from an rvalue of type 'main()::<lambda()>'|
EDIT: Sorry, I asked this question without a thro understanding of references...
I seem to be getting this error when I run this code...
error: invalid initialization of non-const reference of type ...
- 314
2
votes
1
answer
278
views
Lvalue to rvalue conversion with integer pointer
If I read implicit conversions correctly:
Lvalue to rvalue conversion
A glvalue of any non-function, non-array type T can be implicitly converted to a prvalue of the same type. [..]
Unless ...
- 6,920
3
votes
1
answer
274
views
Does a Comparison Between an Lvalue and a Literal Invoke an Lvalue-to-Rvalue Conversion?
I asked this question: static_assert of const Variable
And apparently it comes down to the question does a floating point lvalue get converted to an rvalue for the purposes of comparison?
So in this ...
- 38.9k
0
votes
1
answer
878
views
Delete a node from binary search tree in C
I am trying to delete a node from a binary search tree. But when I want to test the function, I'll get an error message in 'case 3: two children'.
clist->name = temp->name;
This line causes ...
- 863
3
votes
5
answers
2k
views
Will an lvalue to rvalue conversion happen?
C++ Standard (4/5) the lvalue-to-rvalue conversion is not done on the
operand of the unary & operator.
For example:
int x;
int *p = &x;
In the above case, are p are &x both lvalues? ...
- 1,544
7
votes
2
answers
1k
views
Regarding lvalue-to-rvalue conversion, when is it required?
I've been reading quite many on the Internet and it seems that many people mentioned the following rules (but i couldn't find it in the standard),
The addition operator + (and all other binary ...
- 3,964
1
vote
3
answers
906
views
regarding lvalue-to-rvalue conversion
"lvalue-to-rvalue conversion is not done on the operand of the unary & operator."
May I know what it meant for >Can any one explain ..It Please
Ex:
int a[]={1,5};
int* x=&a;
BE Student
16
votes
4
answers
7k
views
Array and Rvalue
$4.2/1 - "An lvalue or rvalue of type
“array ofN T” or “array of unknown
bound of T” can be converted to an
rvalue of type “pointer to T.” The
result is a pointer to the first
element of the ...
- 25.4k