Re: When a variable is passed into a function, is its name kept somewhere for the function to acceess

[DLangLearner via Digitalmars-d-learn]

On Tuesday, 10 November 2015 at 14:22:49 UTC, Gary Willoughby 
wrote:
On Tuesday, 10 November 2015 at 14:14:33 UTC, DlangLearner 
wrote:

Please enlighten me if this can be done, thanks.


If i understand you, you could use a templated function:

import std.stdio;

void foo(alias a)()
{
writefln("%s was passed in.", a.stringof);
}

void main(string[] args)
{
auto bar = "bar";
foo!(bar);
}


This is what I want. Thank you so much, this is a really elegant 
solution.

When a variable is passed into a function, is its name kept somewhere for the function to acceess

[DlangLearner via Digitalmars-d-learn]

Here is what I want to know: when a function is called, does this 
function can recovery the information about which variables pass 
their values into this function's arguments. I use the following 
example to show what I want to know.


void main(){
int a = 1;
writeln(fun(a.stringof, a));
}

//to return "a is assigned to 1"
string fun(string name, int x)
return name~" is assigned to "~x;
}

For this example my question turns to become: can the name for 
fun be derived instead of passing to it?


string fun(int x)
	//is there any way we can know that this value x is passed from 
the variable a in the main function?
	string name = the name of the variable which passes its value to 
x	

return name~" is assigned to "~x;
}

Please enlighten me if this can be done, thanks.

Re: When a variable is passed into a function, is its name kept somewhere for the function to acceess

[Gary Willoughby via Digitalmars-d-learn]

On Tuesday, 10 November 2015 at 14:14:33 UTC, DlangLearner wrote:

Please enlighten me if this can be done, thanks.


If i understand you, you could use a templated function:

import std.stdio;

void foo(alias a)()
{
writefln("%s was passed in.", a.stringof);
}

void main(string[] args)
{
auto bar = "bar";
foo!(bar);
}