Questions tagged [function-signature]
80 questions
1
vote
1 answer
What does "requires" mean in F# function signature?
Please explain the following function signature which appeared when I hovered over the function in VS Code. I'm especially curious what exactly "requires" means and why 'b is 'a.
val handleSingleEvent:
: Request
-> 'b (requires :>…
LearnerX
- 137
- 2
- 8
1
vote
1 answer
Function Signatures/Interfaces from Pybind11 Module (IDE Suggestions)
Let's assume we have a simple module called _sample built with pybind11:
/* py_bindings.cpp */
#include
namespace py = pybind11;
PYBIND11_MODULE(_sample, m) {
m.def("add", [](int a, int b) { return a + b; });
…
Phil-ZXX
- 2,359
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1
vote
1 answer
Apache Drill UDF: No match found for function signature
Hi I'm developing drill user-defined functions. I have written this UDF.
package somepackage.udfs;
import io.netty.buffer.DrillBuf;
import org.apache.drill.exec.expr.DrillSimpleFunc;
import…
fields1631
- 21
- 4
1
vote
1 answer
When I decorate a python function, VS Code shows the wrapper's help, instead of the function's , when hovered
VS is code is now the most popular code editor and I love it.
When you hover your mouse over a function, it shows you the function signature and help doc string.
When you decorate a function, its help docstring changes to that of the wrapper's. ( to…
aahnik
- 1,661
- 1
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1
vote
2 answers
C++ more than one instance of overloaded function matches the argument list when creating a header file
Within my main file of my program I have the following declarations
int main()
{
Customer c;
Part p;
Builder b;
auto partsVec = readpartFile();
auto customerVec = readcustomerFile();
auto builderVec = readbuilderFile();
…
David Ling
- 145
- 1
- 12
1
vote
3 answers
Variable variables as parameters of custom function in usort()
I've been playing around and seeing if I can set up a more dynamic method in PHP.
usort(
$dataset,
function($a, $b){
return strcasecmp($a[$this->parameters], $b[$this->parameters]);
}
);
This line would sort array elements in…
NulisDefo
- 325
- 2
- 7
- 19
1
vote
2 answers
PyCharm: is this kind of automatic signature refactoring possible?
A Python code of a project has a lot of function definitions and calls like:
def some_function(a, b="", c=0, d=None, e="something"):
# whatever
pass
some_function("a", "b", 1, e="something else")
This is very hairy (bad practice - missing…
Roman Susi
- 4,135
- 2
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1
vote
1 answer
PHP type hinting is being ignored, no TypeError exception is thrown
I just debugged some PHP 7.1 code where I'd forgotten to remove a (bool) cast on the return value, but the function had a declared return type of int:
function get_foo(): int {
$val = get_option('foo');
return (bool) $val;
}
$foo =…
Luke Sawczak
- 313
- 4
- 14
1
vote
1 answer
In Haskell, can you have a signature of a function that calls other functions but doesn't have an implementation?
So I'm learning Haskell and I have to implement a treeunzip function that takes a tree of the type (Tree (a,b)) where 'a' and 'b' are integers and returns a list of the two trees unzipped, that is (Tree a, Tree b).
I can get one of the two trees but…
BourbonCreams
- 353
- 4
- 21
1
vote
1 answer
c++ regex for fetching function signature
I am trying to search a function signature using regex_search in c++. Here's what I am using
std::smatch m;
std::regex…
pgundlupet
- 41
- 5
1
vote
2 answers
Check if class object is defined in extension module
Given a class object in Python, how can I determine if the class was defined in an extension module (e.g. c, c++, cython), as opposed to being defined in standard python?
inspect.isbuiltin returns True for functions defined in an extension module,…
Robert T. McGibbon
- 5,075
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1
vote
1 answer
Difference between "function($arg = 0)" and "function($arg)"
Question
In the PHP Official Documentation I found somewhere declarations like this:
public int save ( string $filename [, int $options ] )
and like this:
public mixed load ( string $filename [, int $options = 0 ] )
What's the difference between…
Kamafeather
- 8,663
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1
vote
2 answers
Why can't the compiler deduce to this function template?
We have a function that takes a function object as parameter. There are two overloads of the function, which differ in the function signature.
#include
template
void foo(std::function bar)
{
}
template
danijar
- 32,406
- 45
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1
vote
4 answers
Excel Function format
I am quite new to writing functions in excel (been mainly coding sub procedures).
I was wondering what the following function declaration means?
public function function_name(args as string) as string
I understand everything up to the second…
SeekingAlpha
- 7,489
- 12
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1
vote
2 answers
why name mangling isn't breaking my program?
Possible Duplicate:
Is main() overloaded in C++?
here's my code:
#include
int main(void* a, void* b)
{
std::cout << "hello standalone " << std::endl;
return 0;
}
different parameters should have a…
new_perl
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