[Issue 5953] New: Too many trailing commas are accepted

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5953

           Summary: Too many trailing commas are accepted
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Keywords: accepts-invalid
          Severity: minor
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2011-05-07 16:28:09 PDT ---
Accepting an extra trailing comma is acceptable, but this looks excessive (this
compiles and runs with no errors, DMD 2.053 beta):


void main() {
    auto a = [,,,,,,,,,,,,,,,,,,,,,,,,,,,,,];
    assert(a.length == 0);
}


As in Python I suggest to accept only one extra trailing comma:

>>> a = [1]
>>> a = [1,]
>>> a = [1,,]
  File "<stdin>", line 1
    a = [1,,]
           ^
SyntaxError: invalid syntax

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