Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Tuesday, 10 July 2018 at 14:58:42 UTC, vino.B wrote:
Hi Alex,
I am getting the output as tuples of multiple arrays, but the
requirement is to get the all the tuple in a single array like
the below so that we can perform sorting and printing the
output is easy.
Something along the way
unittest
{
import std.typecons : Tuple, tuple;
alias pair = Tuple!(string, int);
pair[] values;
values ~= tuple("du", 7);
values ~= tuple("Vino", 3);
values ~= tuple(",", 4);
values ~= tuple("hur", 5);
values ~= tuple("Hej", 2);
values ~= tuple("?", 8);
values ~= tuple("mår", 6);
import std.algorithm : sort, each;
import std.stdio : write;
values.sort!((p1, p2) => p1[1] < p2[1])
.each!(p => write(p[0] ~ " "));
}
?
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Tuesday, 10 July 2018 at 14:50:53 UTC, Alex wrote:
On Tuesday, 10 July 2018 at 14:38:03 UTC, vino.B wrote:
Hi Alex,
The reason the I am storing the output of "PFresult.toRange"
to another array "rData" is that the output of the
PFresult.toRange is different each time we execute the
code.(Data is correct) but the way the it output is different.
Is there any way to get the result in a single array - Whole
Data.
Single array - Whole Data
["C:\\Temp\\TEAM1\\Test Result-Team1.docx", 2018-Jun-28
17:37:45.9376229,
"C:\\Temp\\TEAM2\\Test Result-Team2.docx", 2018-Jun-28
17:37:45.9376229,
"C:\\Temp\\SAPNAS3\\TEAM3\\Test Result-Team3.docx",
2018-Jun-28 17:37:45.9376229
]
One array - For Each Data
[ C:\\Temp\\TEAM1\\Test Result-Team1.docx", 2018-Jun-28
17:37:45.9376229] - arr1
[ C:\\Temp\\TEAM2\\Test Result-Team2.docx", 2018-Jun-28
17:37:45.9376229] - arr2
[ C:\\Temp\\TEAM3\\Test Result-Team3.docx", 2018-Jun-28
17:37:45.9376229] - arr3
The code in the program.
foreach(i; PFresult.toRange) { rData ~= i[][]; }
if (!rData[].empty) { rData[].sort!((a,b) => a[1] <
b[1]).each!(e => logF.writefln!"%-83s
%.20s"(e[0].replace(`\\?\`, ""), e[1].to!string)); }
From,
Vino.B
Not sure, if I get your point, but are you aware of tuples?
https://dlang.org/phobos/std_typecons.html#tuple
Hi Alex,
I am getting the output as tuples of multiple arrays, but the
requirement is to get the all the tuple in a single array like
the below so that we can perform sorting and printing the output
is easy.
[
"C:\\Temp\\TEAM1\\Test Result-Team1.docx", 2018-Jun-28
17:37:45.9376229,
"C:\\Temp\\TEAM2\\Test Result-Team2.docx", 2018-Jun-28
17:37:45.9376229,
"C:\\Temp\\SAPNAS3\\TEAM3\\Test Result-Team3.docx", 2018-Jun-28
17:37:45.9376229
]
if (!rData[].empty)
{
rData[].sort!((a,b) => a[1] < b[1]).each!(e =>
logF.writefln!"%-83s %.20s"(e[0],
e[1].to!string));
}
From,
Vino.B
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Tuesday, 10 July 2018 at 14:38:03 UTC, vino.B wrote:
Hi Alex,
The reason the I am storing the output of "PFresult.toRange"
to another array "rData" is that the output of the
PFresult.toRange is different each time we execute the
code.(Data is correct) but the way the it output is different.
Is there any way to get the result in a single array - Whole
Data.
Single array - Whole Data
["C:\\Temp\\TEAM1\\Test Result-Team1.docx", 2018-Jun-28
17:37:45.9376229,
"C:\\Temp\\TEAM2\\Test Result-Team2.docx", 2018-Jun-28
17:37:45.9376229,
"C:\\Temp\\SAPNAS3\\TEAM3\\Test Result-Team3.docx", 2018-Jun-28
17:37:45.9376229
]
One array - For Each Data
[ C:\\Temp\\TEAM1\\Test Result-Team1.docx", 2018-Jun-28
17:37:45.9376229] - arr1
[ C:\\Temp\\TEAM2\\Test Result-Team2.docx", 2018-Jun-28
17:37:45.9376229] - arr2
[ C:\\Temp\\TEAM3\\Test Result-Team3.docx", 2018-Jun-28
17:37:45.9376229] - arr3
The code in the program.
foreach(i; PFresult.toRange) { rData ~= i[][]; }
if (!rData[].empty) { rData[].sort!((a,b) => a[1] <
b[1]).each!(e => logF.writefln!"%-83s
%.20s"(e[0].replace(`\\?\`, ""), e[1].to!string)); }
From,
Vino.B
Not sure, if I get your point, but are you aware of tuples?
https://dlang.org/phobos/std_typecons.html#tuple
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Monday, 9 July 2018 at 18:07:49 UTC, Alex wrote:
On Monday, 9 July 2018 at 17:26:30 UTC, vino.B wrote:
Request Help:
void process(alias coRoutine, T...)(Array!string Dirlst, T
params)
{
ReturnType!coRoutine rData; / This line is not
working
alias scRType = typeof(coRoutine(string.init, T.init));
auto PFresult = taskPool.workerLocalStorage!scRType();
foreach (string FFs; parallel(Dirlst[],1)) {
PFresult.get ~= coRoutine(FFs, params); }
foreach(i; PFresult.toRange) { rData ~= i[][]; }
}
Error:
test.d(206): Error: template instance
`std.traits.ReturnType!(coAgedDirClean)` does not match
template declaration ReturnType(func...) if (func.length == 1
&& isCallable!func)
Yeah... for ReturnType to work, you need a function, but you
have only a template.
The easy solution is to execute the template and to ask the
result for its type:
´´´
void main()
{
process!fun();
}
void process(alias coRoutine, T...)(T params)
{
auto res = coRoutine(params);
pragma(msg, typeof(res));
}
auto fun(T...)(T params)
{
return 42;
}
´´´
If you need it in advance... It is a little bit longer. There
was a place, where I used this once...
See
https://run.dlang.io/is/Xy6Xf4
However, I wonder why you need this, especially as your process
is void. Why not just using auto for results of the coroutines?
Hi Alex,
The reason the I am storing the output of "PFresult.toRange" to
another array "rData" is that the output of the PFresult.toRange
is different each time we execute the code.(Data is correct) but
the way the it output is different. Is there any way to get the
result in a single array - Whole Data.
Single array - Whole Data
["C:\\Temp\\TEAM1\\Test Result-Team1.docx", 2018-Jun-28
17:37:45.9376229,
"C:\\Temp\\TEAM2\\Test Result-Team2.docx", 2018-Jun-28
17:37:45.9376229,
"C:\\Temp\\SAPNAS3\\TEAM3\\Test Result-Team3.docx", 2018-Jun-28
17:37:45.9376229
]
One array - For Each Data
[ C:\\Temp\\TEAM1\\Test Result-Team1.docx", 2018-Jun-28
17:37:45.9376229] - arr1
[ C:\\Temp\\TEAM2\\Test Result-Team2.docx", 2018-Jun-28
17:37:45.9376229] - arr2
[ C:\\Temp\\TEAM3\\Test Result-Team3.docx", 2018-Jun-28
17:37:45.9376229] - arr3
The code in the program.
foreach(i; PFresult.toRange) { rData ~= i[][]; }
if (!rData[].empty) { rData[].sort!((a,b) => a[1] <
b[1]).each!(e => logF.writefln!"%-83s %.20s"(e[0].replace(`\\?\`,
""), e[1].to!string)); }
From,
Vino.B
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Monday, 9 July 2018 at 17:26:30 UTC, vino.B wrote:
Request Help:
void process(alias coRoutine, T...)(Array!string Dirlst, T
params)
{
ReturnType!coRoutine rData; / This line is not
working
alias scRType = typeof(coRoutine(string.init, T.init));
auto PFresult = taskPool.workerLocalStorage!scRType();
foreach (string FFs; parallel(Dirlst[],1)) { PFresult.get
~= coRoutine(FFs, params); }
foreach(i; PFresult.toRange) { rData ~= i[][]; }
}
Error:
test.d(206): Error: template instance
`std.traits.ReturnType!(coAgedDirClean)` does not match
template declaration ReturnType(func...) if (func.length == 1
&& isCallable!func)
Yeah... for ReturnType to work, you need a function, but you have
only a template.
The easy solution is to execute the template and to ask the
result for its type:
´´´
void main()
{
process!fun();
}
void process(alias coRoutine, T...)(T params)
{
auto res = coRoutine(params);
pragma(msg, typeof(res));
}
auto fun(T...)(T params)
{
return 42;
}
´´´
If you need it in advance... It is a little bit longer. There was
a place, where I used this once...
See
https://run.dlang.io/is/Xy6Xf4
However, I wonder why you need this, especially as your process
is void. Why not just using auto for results of the coroutines?
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Monday, 9 July 2018 at 15:49:50 UTC, Alex wrote:
On Monday, 9 July 2018 at 15:40:53 UTC, vino.B wrote:
On Sunday, 8 July 2018 at 19:10:24 UTC, Alex wrote:
On Sunday, 8 July 2018 at 18:46:31 UTC, vino.B wrote:
Request you help, in the below code we pass the function
"Testfun" as a parameter to another function "process" in
order for the function "process" to work we have to specify
the type of the parameter that is passed to the function "(T
function(string, int) coRoutine, string Test, int Size) ",
so now how do we pass a function whose parameter would be
dynamic and the type is unknown.
What do you mean with a "function with dynamic parameters"
and "unknown type"?
But how about
´´´
void main()
{
process!fun();
}
void process(alias coRoutine, T...)(T params)
{
coRoutine(params);
}
auto fun(T...)(T params)
{
}
´´´
HI Alex,
I tried you method, but it not working as expected, the
process!fun1(Test1) works but the process!fun2(Test1, Size )
does not work, instead of displaying the value (Test, 1) it
output's the parameter "Test1".
Output:
Test
Test1
If I comment process!fun1(Test1); then the output is same
Output :
Test1
import std.stdio: writeln;
void main()
{
string Test1 = "Test";
int Size = 1;
process!fun1(Test1);
process!fun2(Test1, Size );
}
void process(alias coRoutine, T...)(T params)
{
coRoutine(params);
}
auto fun1(T...)(T params)
{
writeln(params);
}
auto fun2(T...)(T params)
{
writeln(params);
}
From,
Vino.B
As I can see, this is the expected output.
The "1" after "Test" is the value of parameter "Size"...
Hi Alex,
Thank you a lot, i was able to improvise using your logic, and i
need more help, the below code is working as expected using your
logic, now how do i get the return type of the function
Request Help:
void process(alias coRoutine, T...)(Array!string Dirlst, T params)
{
ReturnType!coRoutine rData; / This line is not working
alias scRType = typeof(coRoutine(string.init, T.init));
auto PFresult = taskPool.workerLocalStorage!scRType();
foreach (string FFs; parallel(Dirlst[],1)) { PFresult.get
~= coRoutine(FFs, params); }
foreach(i; PFresult.toRange) { rData ~= i[][]; }
}
Error:
test.d(206): Error: template instance
`std.traits.ReturnType!(coAgedDirClean)` does not match template
declaration ReturnType(func...) if (func.length == 1 &&
isCallable!func)
Working Code:
auto coAgedDirClean(T...)(string FFs, T params) {
auto dFiles = Array!(Tuple!(string,
SysTime))(dirEntries(FFs, SpanMode.shallow).filter!(a => a.isFile
&& a.size > params[0]).map!(a => tuple(a.name,
a.timeLastModified)));
return dFiles;
}
auto coAgedDirDelete(T...)(string FFs, T params) {
auto dFiles = Array!(Tuple!(string,
SysTime))(dirEntries(FFs, SpanMode.shallow).filter!(a => a.isFile
&& a.size > params[0]).map!(a => tuple(a.name,
a.timeLastModified)));
if (params[1] == "run" && !dFiles.empty) { foreach(d;
parallel(dFiles[], 1)) { remove(d[0]); }}
return dFiles;
}
void process(alias coRoutine, T...)(Array!string Dirlst, T params)
{
alias scRType = typeof(coRoutine(string.init, T.init));
auto PFresult = taskPool.workerLocalStorage!scRType();
foreach (string FFs; parallel(Dirlst[],1)) { PFresult.get
~= coRoutine(FFs, params); }
foreach(i; PFresult.toRange) { writeln(i[][]); }
}
void main()
{
Array!string AgedDir, DeleteDir;
AgedDir.insert("C:\\Temp\\TEAM1");
DeleteDir.insert("C:\\Temp\\BACKUP1");
ulong Size = 102;
string Step = "run";
process!coAgedDirClean(AgedDir, Size );
process!coAgedDirDelete(DeleteDir, Size, Step);
}
From,
Vino.B
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Monday, 9 July 2018 at 15:40:53 UTC, vino.B wrote:
On Sunday, 8 July 2018 at 19:10:24 UTC, Alex wrote:
On Sunday, 8 July 2018 at 18:46:31 UTC, vino.B wrote:
Request you help, in the below code we pass the function
"Testfun" as a parameter to another function "process" in
order for the function "process" to work we have to specify
the type of the parameter that is passed to the function "(T
function(string, int) coRoutine, string Test, int Size) ", so
now how do we pass a function whose parameter would be
dynamic and the type is unknown.
What do you mean with a "function with dynamic parameters" and
"unknown type"?
But how about
´´´
void main()
{
process!fun();
}
void process(alias coRoutine, T...)(T params)
{
coRoutine(params);
}
auto fun(T...)(T params)
{
}
´´´
HI Alex,
I tried you method, but it not working as expected, the
process!fun1(Test1) works but the process!fun2(Test1, Size )
does not work, instead of displaying the value (Test, 1) it
output's the parameter "Test1".
Output:
Test
Test1
If I comment process!fun1(Test1); then the output is same
Output :
Test1
import std.stdio: writeln;
void main()
{
string Test1 = "Test";
int Size = 1;
process!fun1(Test1);
process!fun2(Test1, Size );
}
void process(alias coRoutine, T...)(T params)
{
coRoutine(params);
}
auto fun1(T...)(T params)
{
writeln(params);
}
auto fun2(T...)(T params)
{
writeln(params);
}
From,
Vino.B
As I can see, this is the expected output.
The "1" after "Test" is the value of parameter "Size"...
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Sunday, 8 July 2018 at 19:10:24 UTC, Alex wrote:
On Sunday, 8 July 2018 at 18:46:31 UTC, vino.B wrote:
Request you help, in the below code we pass the function
"Testfun" as a parameter to another function "process" in
order for the function "process" to work we have to specify
the type of the parameter that is passed to the function "(T
function(string, int) coRoutine, string Test, int Size) ", so
now how do we pass a function whose parameter would be dynamic
and the type is unknown.
What do you mean with a "function with dynamic parameters" and
"unknown type"?
But how about
´´´
void main()
{
process!fun();
}
void process(alias coRoutine, T...)(T params)
{
coRoutine(params);
}
auto fun(T...)(T params)
{
}
´´´
HI Alex,
I tried you method, but it not working as expected, the
process!fun1(Test1) works but the process!fun2(Test1, Size ) does
not work, instead of displaying the value (Test, 1) it output's
the parameter "Test1".
Output:
Test
Test1
If I comment process!fun1(Test1); then the output is same
Output :
Test1
import std.stdio: writeln;
void main()
{
string Test1 = "Test";
int Size = 1;
process!fun1(Test1);
process!fun2(Test1, Size );
}
void process(alias coRoutine, T...)(T params)
{
coRoutine(params);
}
auto fun1(T...)(T params)
{
writeln(params);
}
auto fun2(T...)(T params)
{
writeln(params);
}
From,
Vino.B
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Monday, 9 July 2018 at 05:54:27 UTC, vino.B wrote:
On Sunday, 8 July 2018 at 19:22:32 UTC, Timoses wrote:
Perhaps you could tell us what your goal is. People here might
come up with a nice solution. Why do you feel like having to
use templated functions in the first place? That is, what is
the generic goal of the functions you are trying to define?
Hi Timoses,
We are converting a Power shell script to D in phased manner;
the PS script has many functions and we converted few function
to D in Phase 1.
Phase 1:
Structure of the Program
Main -> Thread Manager->CoFunction1(Fs1,2,3,4,5)
Main -> Thread Manager->CoFunction2(Fs1,2,3,4,5)
The thread manager will call the Cofunctions and the function
gets executed on “N” of file systems each of size 5-10 TB.
The function that we transformed all has the same number of
parameters (3) and the type was same (string, string, int), so
we wrote a static thread manager as below
void ptManager (T)(T function(string, string, int) coRoutine,
Array!string Dirlst, string Step, int Size) {
alias scRType = typeof(coRoutine(string.init, string.init,
int.init));
auto PFresult = taskPool.workerLocalStorage!scRType();
ReturnType!coRoutine rData;
foreach (string FFs; parallel(Dirlst[0 .. $],1)) {
PFresult.get ~= coRoutine(FFs.strip, Step); }
foreach(i; PFresult.toRange) { writeln(i[][]); }
}
void main () {
ptManager(, Fn1Dirlst, Step, Size);
ptManager(, Fn2Dirlst, Step, Age);
}
Phase 2:
In phase 2 we are transferring few more function to the
existing D code, and these functions has variable number of
parameter and different type eg: Function3(string, string,
string), Function(string, int, string, int).
Initially I tried to re-write the ptManager function for each
type of function which ended with 8 ptManager functions, Eg :
ptManager1(string, string, int), ptManager2(string, string,
string), ptManager3(string,int), so now trying as to whether we
can use 1 ptManager function which can process function with
“N” of parameter and types to process all the function, hence
trying to implement the Variadic function. Hence request your
help and suggestion to achieve this.
Command Parameter to all the functions:
Array!string Dirlist : This parameter will contain the the Fs
names
File logF: This parameter is used to store the outoput
File logE: This parameter is used to store the Error
Information.
Rest of the function has variable parameters/type.
From,
Vino.B
Ok, interesting. I don't really know my way around parallelism,
though I think you should take a look at Alex's suggestion
(https://forum.dlang.org/post/adepbwetsiuwguuaa...@forum.dlang.org) for a template solution. You could e.g. do
void ptManager(alias func, T ...)(T args)
{
import std.traits : Parameters, ReturnType;
static assert(is(Parameters!func == T), "Arguments don't
fit function!");
alias RetType = ReturnType!func;
// only receive value if return type is not void
static if (!is(RetType == void))
RetType mVal = func(args);
// write it to stdout if mVal is a valid symbol
// (could also combine that in the above static if...)
static if (is(typeof(mVal)))
{
import std.stdio : writeln;
writeln(mVal);
}
}
unittest
{
ptManager!((int i) => i+1)(2);
void someDelegate(string s1, string s2, int i1) { /* ...
*/ }
ptManager!someDelegate("hello", "ptManager", 100);
}
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Monday, 9 July 2018 at 05:54:27 UTC, vino.B wrote:
In phase 2 we are transferring few more function to the
existing D code, and these functions has variable number of
parameter and different type eg: Function3(string, string,
string), Function(string, int, string, int).
Initially I tried to re-write the ptManager function for each
type of function which ended with 8 ptManager functions, Eg :
ptManager1(string, string, int), ptManager2(string, string,
string), ptManager3(string,int), so now trying as to whether we
can use 1 ptManager function which can process function with
“N” of parameter and types to process all the function, hence
trying to implement the Variadic function. Hence request your
help and suggestion to achieve this.
Variadic templates to the rescue:
void ptManager1(Fn, Args...)(Fn coRoutine, Array!string Dirlst,
Args args)
if (__traits(compiles, coRoutine("", args)))
{
alias scRType = typeof(coRoutine("", args));
auto PFresult = taskPool.workerLocalStorage!scRType();
foreach (string FFs; parallel(Dirlst[], 1)) {
PFresult.get ~= coRoutine(FFs.strip, args);
}
foreach(i; PFresult.toRange) { writeln(i[][]); }
}
unittest {
ptManager1(, Fn1Dirlst, Step, Size);
ptManager1(, Fn2Dirlst, Step, Age);
}
Alternatively, pass the co-routine as an alias:
void ptManager2(alias coRoutine, Args...)(Array!string Dirlst,
Args args)
if (__traits(compiles, coRoutine("", args)))
{
alias scRType = typeof(coRoutine("", args));
auto PFresult = taskPool.workerLocalStorage!scRType();
foreach (string FFs; parallel(Dirlst[], 1)) {
PFresult.get ~= coRoutine(FFs.strip, args);
}
foreach(i; PFresult.toRange) { writeln(i[][]); }
}
unittest {
ptManager2!function1(Fn1Dirlst, Step, Size);
ptManager2!function2(Fn2Dirlst, Step, Age);
}
These options are essentially equivalent; the main reason to
prefer the first is if the functions are passed around at
runtime. If you don't do that, ptManager2 may be slightly faster.
Using logE and logF is left as an exercise for the reader. :p
As an aside, I first thought of making a less generic ptManager
that'd work something like this:
ptManager3(dir => function1(dir, Step, Size), Fn1Dirlst);
However, since the return value changes between functions, that
doesn't really buy us much - we'll still have to templatize
ptManager3 on the return type, and the contents of the function
will be very much the same.
--
Simen
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Sunday, 8 July 2018 at 19:22:32 UTC, Timoses wrote:
On Sunday, 8 July 2018 at 18:46:31 UTC, vino.B wrote:
Hi All,
Request you help, in the below code we pass the function
"Testfun" as a parameter to another function "process" in
order for the function "process" to work we have to specify
the type of the parameter that is passed to the function "(T
function(string, int) coRoutine, string Test, int Size) ", so
now how do we pass a function whose parameter would be dynamic
and the type is unknown.
void process(T)(T function(string, int) coRoutine, string
Test, int Size) {
This would templetize the return type of the coRoutine, thus
within that function you could do
T returnedValue = coRoutine(string.init, int.init);
alias scRType = typeof(coRoutine(string.init, int.init));
Eg:
Run1 : process(, Test, Size);
void process(T ...)(T function(string, int) coRoutine, string
Test) {
alias scRType = typeof(coRoutine(string.init, int.init));
Run2 : process(, Test, Size, Str1);
void process(T)(T function(string, int, string) coRoutine,
string Test, int Size, string Str1) {
alias scRType = typeof(coRoutine(string.init, int.init,
string.int));
Run3 : process(, Test);
void process(T)(T function(string, string) coRoutine, string
Test, int Size) {
alias scRType = typeof(coRoutine(string.init));
PFresult.get = coRoutine(args);
Some what like this
auto Testfun (string FFs, int Size) { return tuple(FFs, Size);
}
void process(T ...)(T function(T args) coRoutine, T args) {
This would mean that if you pass a function that returns for
example an int, it must also
- take an int as argument
- and process has to accept another int
e.g.
process((int i) => i+1, 3);
if T would be (int, string) you would have to pass something
like
process((int i, string s) {
return AliasSeq!(int, string); }, // error: not even
sure how to express this
3, "hello");
where I'm not sure how to express the return type of (int,
string)... Does anybody know this? Would the Tuple Dip make
this possible?
(https://forum.dlang.org/post/p3bdp1$2b4e$1...@digitalmars.com)
alias scRType = typeof(coRoutine(T.init));
PFresult.get = coRoutine(T);
void main() {
string Test ="C:\\Temp\\BACKUP1"; int Size = 1;
process(, Test, Size);
}
Code : Working
import std.stdio: writeln;
import std.container.array;
import std.typecons: tuple;
import std.parallelism: taskPool;
auto Testfun (string FFs, int Size) { return tuple(FFs, Size);
}
void process(T)(T function(string, int) coRoutine, string
Test, int Size) {
alias scRType = typeof(coRoutine(string.init, int.init));
auto PFresult = taskPool.workerLocalStorage!scRType();
PFresult.get = coRoutine(Test, Size);
foreach(i; PFresult.toRange) { writeln(i[][]); }
}
void main() {
string Test ="C:\\Temp\\BACKUP1"; int Size = 1;
process(, Test, Size);
}
From,
Vino.B
I suggest taking a look at
https://dlang.org/phobos/std_traits.html .
E.g. ReturnType and Parameters:
int func() { return 3; }
assert(is(ReturnType!func == int));
void gunc(int i, double j) {}
import std.meta : AliasSeq;
assert(is(Parameters!gunc == AliasSeq!(int, double)));
Perhaps you could tell us what your goal is. People here might
come up with a nice solution. Why do you feel like having to
use templated functions in the first place? That is, what is
the generic goal of the functions you are trying to define?
Hi Timoses,
We are converting a Power shell script to D in phased manner;
the PS script has many functions and we converted few function to
D in Phase 1.
Phase 1:
Structure of the Program
Main -> Thread Manager->CoFunction1(Fs1,2,3,4,5)
Main -> Thread Manager->CoFunction2(Fs1,2,3,4,5)
The thread manager will call the Cofunctions and the function
gets executed on “N” of file systems each of size 5-10 TB.
The function that we transformed all has the same number of
parameters (3) and the type was same (string, string, int), so we
wrote a static thread manager as below
void ptManager (T)(T function(string, string, int) coRoutine,
Array!string Dirlst, string Step, int Size) {
alias scRType = typeof(coRoutine(string.init, string.init,
int.init));
auto PFresult = taskPool.workerLocalStorage!scRType();
ReturnType!coRoutine rData;
foreach (string FFs; parallel(Dirlst[0 .. $],1)) {
PFresult.get ~= coRoutine(FFs.strip, Step); }
foreach(i; PFresult.toRange) { writeln(i[][]); }
}
void main () {
ptManager(, Fn1Dirlst, Step, Size);
ptManager(, Fn2Dirlst, Step, Age);
}
Phase 2:
In phase 2 we are transferring few more function to the existing
D code, and these functions has variable number of parameter and
different type eg: Function3(string, string, string),
Function(string, int, string, int).
Initially I tried to re-write the ptManager function for each
type of function which ended with 8 ptManager functions, Eg :
ptManager1(string, string, int), ptManager2(string, string,
string),
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Sunday, 8 July 2018 at 18:46:31 UTC, vino.B wrote:
Hi All,
Request you help, in the below code we pass the function
"Testfun" as a parameter to another function "process" in order
for the function "process" to work we have to specify the type
of the parameter that is passed to the function "(T
function(string, int) coRoutine, string Test, int Size) ", so
now how do we pass a function whose parameter would be dynamic
and the type is unknown.
void process(T)(T function(string, int) coRoutine, string Test,
int Size) {
This would templetize the return type of the coRoutine, thus
within that function you could do
T returnedValue = coRoutine(string.init, int.init);
alias scRType = typeof(coRoutine(string.init, int.init));
Eg:
Run1 : process(, Test, Size);
void process(T ...)(T function(string, int) coRoutine, string
Test) {
alias scRType = typeof(coRoutine(string.init, int.init));
Run2 : process(, Test, Size, Str1);
void process(T)(T function(string, int, string) coRoutine,
string Test, int Size, string Str1) {
alias scRType = typeof(coRoutine(string.init, int.init,
string.int));
Run3 : process(, Test);
void process(T)(T function(string, string) coRoutine, string
Test, int Size) {
alias scRType = typeof(coRoutine(string.init));
PFresult.get = coRoutine(args);
Some what like this
auto Testfun (string FFs, int Size) { return tuple(FFs, Size); }
void process(T ...)(T function(T args) coRoutine, T args) {
This would mean that if you pass a function that returns for
example an int, it must also
- take an int as argument
- and process has to accept another int
e.g.
process((int i) => i+1, 3);
if T would be (int, string) you would have to pass something like
process((int i, string s) {
return AliasSeq!(int, string); }, // error: not even sure
how to express this
3, "hello");
where I'm not sure how to express the return type of (int,
string)... Does anybody know this? Would the Tuple Dip make this
possible?
(https://forum.dlang.org/post/p3bdp1$2b4e$1...@digitalmars.com)
alias scRType = typeof(coRoutine(T.init));
PFresult.get = coRoutine(T);
void main() {
string Test ="C:\\Temp\\BACKUP1"; int Size = 1;
process(, Test, Size);
}
Code : Working
import std.stdio: writeln;
import std.container.array;
import std.typecons: tuple;
import std.parallelism: taskPool;
auto Testfun (string FFs, int Size) { return tuple(FFs, Size); }
void process(T)(T function(string, int) coRoutine, string Test,
int Size) {
alias scRType = typeof(coRoutine(string.init, int.init));
auto PFresult = taskPool.workerLocalStorage!scRType();
PFresult.get = coRoutine(Test, Size);
foreach(i; PFresult.toRange) { writeln(i[][]); }
}
void main() {
string Test ="C:\\Temp\\BACKUP1"; int Size = 1;
process(, Test, Size);
}
From,
Vino.B
I suggest taking a look at
https://dlang.org/phobos/std_traits.html .
E.g. ReturnType and Parameters:
int func() { return 3; }
assert(is(ReturnType!func == int));
void gunc(int i, double j) {}
import std.meta : AliasSeq;
assert(is(Parameters!gunc == AliasSeq!(int, double)));
Perhaps you could tell us what your goal is. People here might
come up with a nice solution. Why do you feel like having to use
templated functions in the first place? That is, what is the
generic goal of the functions you are trying to define?
Re: Passing function(whose parameter would be dynamic and the type is unknown) as a parameter to another function.
On Sunday, 8 July 2018 at 18:46:31 UTC, vino.B wrote:
Request you help, in the below code we pass the function
"Testfun" as a parameter to another function "process" in order
for the function "process" to work we have to specify the type
of the parameter that is passed to the function "(T
function(string, int) coRoutine, string Test, int Size) ", so
now how do we pass a function whose parameter would be dynamic
and the type is unknown.
What do you mean with a "function with dynamic parameters" and
"unknown type"?
But how about
´´´
void main()
{
process!fun();
}
void process(alias coRoutine, T...)(T params)
{
coRoutine(params);
}
auto fun(T...)(T params)
{
}
´´´
