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Nimで変数の型名を確認する

Posted at

はじめに

Nimは型推論してくれるので、型を意識しなくても割と使えるど
いざ関数定義とかで型を書く必要が出てきたときに困ったりしてた。

で、どうやんの?

typeでOK。

type X = object of RootObj                                                      
type RefX = ref object of RootObj                                               
proc someFunc(n: int): string = $(n * 2)
echo (new X).type                                                               
echo X().type                                                                   
echo (new RefX).type                                                            
echo RefX().type                                                                
echo 3.type                                                                     
echo 3'i8.type                                                                  
echo 3'u.type                                                                   
echo 3'u32.type                                                                 
echo "hello".type                                                               
echo 'a'.type                                                                   
echo (42, 'c', "string").type                                                   
echo someFunc.type
実行結果
ref X
X
RefX
RefX
int
int8
uint
uint32
string
char
(int, char, string)
proc (n: int): string{.noSideEffect, gcsafe, locks: 0.}

以上〜。

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