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Template std.functional.unaryFun
Transforms a string
representing an expression into a unary
function. The string
must either use symbol name a
as
the parameter or provide the symbol via the parmName
argument.
template unaryFun(alias fun, string parmName = "a")
;
Contained Functions
Name | Description |
---|---|
unaryFun |
Parameters
Name | Description |
---|---|
fun | a string or a callable |
parmName | the name of the parameter if fun is a string. Defaults
to "a" . |
Returns
If fun
is a string
, a new single parameter function
If fun
is not a string
, an alias to fun
.
Example
// Strings are compiled into functions:
alias isEven = unaryFun!("(a & 1) == 0");
assert(isEven(2) && !isEven(1));
Authors
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.