isIterable

Returns true if T can be iterated over using a foreach loop with a single loop variable of automatically inferred type, regardless of how the foreach loop is implemented. This includes ranges, structs/classes that define opApply with a single loop variable, and builtin dynamic, static and associative arrays.

enum bool isIterable(T);

Examples

1 struct OpApply
2 {
3     int opApply(scope int delegate(ref uint) dg) { assert(0); }
4 }
5 
6 struct Range
7 {
8     @property uint front() { assert(0); }
9     void popFront() { assert(0); }
10     enum bool empty = false;
11 }
12 
13 static assert( isIterable!(uint[]));
14 static assert( isIterable!OpApply);
15 static assert( isIterable!(uint[string]));
16 static assert( isIterable!Range);
17 
18 static assert(!isIterable!uint);

isIterable

Examples

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