[Issue 10396] New: Optional, simplified syntax for simple contracts

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http://d.puremagic.com/issues/show_bug.cgi?id=10396

           Summary: Optional, simplified syntax for simple contracts
           Product: D
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: tommitissari at hotmail.com


--- Comment #0 from Tommi <tommitissari at hotmail.com> 2013-06-17 18:20:47 PDT ---
"Simple things should be simple, complex things should be 
possible." -Alan Kay

I'd like to simplify the syntax of function pre- and 
post-conditions when the contract block consists of a single 
assert statement. A special syntax for this special case would 
omit all of the following:
1) the block's curly braces
2) the assert keyword
3) the semi-colon ending the assert statement
4) the body keyword (if and only if it's right after the block)

So, instead of writing this:

int func(int i)
in
{
    assert(i < 5);
}
out(r)
{
    assert(r < 9);
}
body
{
    return i * 2;
}

...you'd be able to write this:

int func(int i)
in (i < 5)
out(r) (r < 9)
{
    return i * 2;
}

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