• Marc (9/21) Mar 14 2018 myModule.d
• Adam D. Ruppe (14/16) Mar 14 2018 Check the help text:
• Seb (10/32) Mar 14 2018 Not even that dmd mymodule.d -run app.d works and dmd -i -run

Marc <jckj33 gmail.com> writes:

assume the files:

app.d

 void main() {
   import myModule : foo;
    writeln(foo(...));

 }

myModule.d

module myModule;
 int foo(int n) { .... }

the following fail:

 dmd -run app.d mymodule.d

give error like this:

 Error: module `myModule` is in file 'myModule.d' which cannot 
 be read

but this doesn't fail:

 dmd app.d mymodule.d && app

Why does -run fail here? I thought it was a shorthand to this 
batch:

 dmd app.d mymodule.d
 app.exe
 del app.exe

Adam D. Ruppe <destructionator gmail.com> writes:

On Wednesday, 14 March 2018 at 14:44:24 UTC, Marc wrote:
 Why does -run fail here? I thought it was a shorthand to this 
 batch:

Check the help text:

$ dmd -h
   dmd [<option>...] -run <file> [<arg>...]
   <arg>            Argument to pass when running the resulting 
program

Notice that there's only one file there. Everything after it is 
passed as args to the resulting program. So dmd -run cannot 
support multiple D files.

Though, with the new `-i` option you might be able to get it to 
infer modules.

dmd -i -run file_with_main.d args_to_main.......

and if it can locate the other modules automatically it should 
bring them in there.

Seb <seb wilzba.ch> writes:

On Wednesday, 14 March 2018 at 14:44:24 UTC, Marc wrote:
 assume the files:

 app.d

 void main() {
   import myModule : foo;
    writeln(foo(...));

 }

 myModule.d

 module myModule;
 int foo(int n) { .... }

 the following fail:

 dmd -run app.d mymodule.d

 give error like this:

 Error: module `myModule` is in file 'myModule.d' which cannot 
 be read

 but this doesn't fail:

 dmd app.d mymodule.d && app

 Why does -run fail here? I thought it was a shorthand to this 
 batch:

 dmd app.d mymodule.d
 app.exe
 del app.exe


Not even that dmd mymodule.d -run app.d works and dmd -i -run 
app.d works too.

However, at the moment -run needs to be the last parameter. 
That's a more or less arbitrary restriction.
And no one has lifted it (yet).
Though there's a bit of work on that front:

https://github.com/dlang/dmd/pull/7927

The main problem is that the arguments after -run module are 
passed to the program and thus -run can be ambiguous.