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Template std.variant.VariantN.opIndex

Array and associative array operations. If a VariantN contains an (associative) array, it can be indexed into. Otherwise, an exception is thrown.

Arguments

template opIndex(K);

Functions

Function name Description
opIndex

Example

auto a = Variant(new int[10]);
a[5] = 42;
assert(a[5] == 42);
int[int] hash = [ 42:24 ];
a = hash;
assert(a[42] == 24);

Example

Caveat

Due to limitations in current language, read-modify-write operations op= will not work properly: 

Variant a = new int[10];
a[5] = 42;
a[5] += 8;
//assert(a[5] == 50); // will fail, a[5] is still 42

Authors

Andrei Alexandrescu

License

Boost License 1.0.

Comments