On Monday, 11 November 2013 at 10:10:33 UTC, Timothee Cour wrote:
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
<[email protected]>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.
Perhaps an alternative would be:
asserts {
x < y
z == z
}
Where the macro would do something like this once converted:
if (!(x < y)) writeln("x < y failed with x=", x, " y= ", y);
if (!(z == z)) writeln("z == z failed with z=", z);
This would also have the benefit of allowing for multiple assert
statements for one block.
