Hi Jeremy,
On Sun, Mar 08, 2020 at 10:40:03AM +0000, Jeremy Sowden wrote:
> Just noticed that the production for right shifts differs from the
> production for left shifts (src/parser_bison.y, ll. 3020ff.):
>
> shift_stmt_expr : primary_stmt_expr
> | shift_stmt_expr LSHIFT primary_stmt_expr
> {
> $$ = binop_expr_alloc(&@$, OP_LSHIFT, $1, $3);
> }
> | shift_stmt_expr RSHIFT primary_rhs_expr
> {
> $$ = binop_expr_alloc(&@$, OP_RSHIFT, $1, $3);
> }
> ;
>
> Is there a reason why the RHS of LSHIFT is primary_stmt_expr, but the
> RHS of RSHIFT is primary_rhs_expr?
It's likely a leftover. The rhs rule was introduced to reduce chances
of hitting shift/reduce conflicts, and to restrict syntax on the rhs.
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