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Template std.conv.castFrom
A wrapper on top of the built-in cast operator that allows one to restrict
casting of the original type of the value.
A common issue with using a raw cast is that it may silently continue to
compile even if the value's type has changed during refactoring,
which breaks the initial assumption about the cast.
Arguments
template castFrom(From);
Functions
| Function name | Description |
|---|---|
| to |
Parameters
| Name | Description |
|---|---|
| From | The type to cast from. The programmer must ensure it is legal
to make this cast. |
Example
// test all the hex digits
static assert( ("0123456789abcdefABCDEF").isHexLiteral);
// empty or white strings are not valid
static assert( "\r\n\t".isHexLiteral);
// but are accepted if the count of hex digits is even
static assert( "A\r\n\tB".isHexLiteral);
Authors
Walter Bright, Andrei Alexandrescu, Shin Fujishiro, Adam D. Ruppe, Kenji Hara