For(Auto [dx,dy]: {{0,1},{0,-1},{1,0},{-1,0}}) GCC => error: unable to deduce ‘std::initializer_list<auto>&&’ from

Question

For(Auto [dx,dy]: {{0,1},{0,-1},{1,0},{-1,0}}) GCC => error: unable to deduce ‘std::initializer_list<auto>&&’ from

‘{{0, 1}, {0, -1}, {1, 0}, {-1, 0}}’
for(auto [dx,dy]: {{0,1},{0,-1},{1,0},{-1,0}}){
^

Clang => error: cannot use type 'void' as a range
for(auto [dx,dy]: {{0,1},{0,-1},{1,0},{-1,0}}){
^

Is there a way to make this work? While I can make vector above and iterate over it, I am a little confused why I can't do like this

0

07.06.2020

2 ответов

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swarnim

You can't

0

08.06.2020

Cengizhan Pasaoglu · Accepted Answer

Cengizhan Pasaoglu

Because type-deduction cannot extract which type you want to use. std::array, std::vector, list? So, it cannot be known by compiler.

0

08.06.2020

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