I would really like to use AST macros for the following use case:

myAssert( x < y);

//will print, on failure, a message, along with all values appearing inside macro myAssert:

x<y failed: x=..., y=...

myAssert( fun(x,y)==z1+z2)

//likewise, but nesting down to all individual variables appearing inside the macro:

x=..., y=..., fun(x,y)=..., z1=..., z2=..., bar(z1+z2)=...

This would advantageously replace the plethora of unittest helpers found in other languages, eg: CHECK_EQ, CHECK_LEQ, etc.

Invaluable for debugging or informative unittests and logs.

On Mon, Nov 11, 2013 at 1:52 AM, Rikki Cattermole <alphaglosined@gmail.com> wrote:

On Monday, 11 November 2013 at 09:01:31 UTC, dennis luehring wrote:

One of our targets for AST macros should be the ability to
replicate roughly linq from c# / .net.

An example syntax for use with AST could be:

auto data = [5, 7, 9];
int[] data2;
query {
from value in data
where value >= 6
add to data2
}

Could be unwrapped to:

auto data = [5, 7, 9];
int[] data2;
foreach(value; data) {
if (value >= 6) data2 ~= value;
}

could you add the example to the DIP wiki page

Adding use case section with Linq example.
Please remove / modify as required as is first time editing wiki.