Finding all Functions in a Module

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Revision as of 13:36, 23 March 2014 by PhilippeSigaud (talk | contribs)
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Level: Novice
Cookbook Type: Recipe
Cookbook Status: Draft
Approximate reading time: 15 min
0.249 hr
D Version: D2

This recipe shows how to list all functions in a module. More generally, it can be used to list all symbols in a module and filter them according to a specific predicate.

First, we need a tuple of all symbol names in a module:

__traits(allMembers, mymodule)

Note that __traits(allMembers, XXX) returns a tuple of strings, not a tuple of symbols.

To iterate on this tuple, a simple foreach works very well:

foreach(m; __traits(allMembers, mymodule)) 

Inside the foreach loop, we can use __traits(getMember, parentSymbol, name) to transform name (a string) into a real symbol. Then static if will test each symbol in turn. Here the predicate is __traits(isStaticFunction, XXX):

Program Code

module mymodule;
import std.stdio : writeln;

void main() {

    foreach(m; __traits(allMembers, mymodule)) 
        static if (__traits(isStaticFunction, __traits(getMember, mymodule, m))) 

void myfunc() {}

int myOtherFunc(int i) { return i+1; }

Compilation Output