Hi,

This is a second revision at adding support for evaluation D
expressions from gdb.  Grammar is pretty much in the same state as the
previous patch.  Just a couple of parser fixes and correct handling of
dollar variables.

Turns out that I can't really think of much good to go into the
testsuite.  So I ended up just adding in tests where behaviour in
d-exp.y is meant to differ from c-exp.y.

Regards
Iain.


    Initial pass at D language expression parser support.

    2014-06-05  Iain Buclaw  <ibuclaw@gdcproject.org>

        * Makefile.in (SFILES): Add d-exp.y.
        (YYFILES): Add d-exp.c.
        (YYOBJ): Add d-exp.o.
        (local-maintainer-clean): Delete d-exp.c.
        * d-exp.y: New file.
        * d-lang.h (d_parse): New declaration.
        (d_error): New declaration.
        * d-lang.c (d_op_print_tab): Add entry for BINOP_CONCAT and BINOP_EXP.
        Set BINOP_EQUAL and BINOP_NOTEQUAL to same precedence as other
        PREC_ORDER operators.
        (d_language_defn): Use d_parse, d_error instead of c_parse, c_error.

    2014-06-05  Iain Buclaw  <ibuclaw@gdcproject.org>

        * gdb.dlang/expression.exp: New file.

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