Firstly, we can do SLRR and simplification with primary_no_array_creation_expression:
| Code Block |
|---|
primary_no_array_creation_expression
: (literal
| simple_name
| parenthesized_expression
| member_access
| invocation_expression
| this_access
| base_access
| post_increment_expression
| post_decrement_expression
| object_creation_expression
| delegate_creation_expression
| anonymous_object_creation_expression
| typeof_expression
| checked_expression
| unchecked_expression
| default_value_expression
| anonymous_method_expression
| sizeof_expression
| primary_expression OP_PTR IDENTIFIER
) (OPEN_BRACKET (expression_list | expression) CLOSE_BRACKET)*
;
|
...
This point seems to be problematic. primary_expression is actually SLR. But due to the parentheses ANTLR considers them MLR. In-factoring is the only and somewhat ugly solution to allow SLRR:
...
The only simplification which preserves the equivalence without checking for validity would be the out-factoring of "(OPEN_BRACKET (expression_list | expression) CLOSE_BRACKET)*", but as I use a second pass for my compiler a further simplification can be done.
The first move is to pretend the line "array_creation_expression (OPEN_BRACKET (expression_list | expression) CLOSE_BRACKET)*" and out-factor the inner trailing. Thus the outer trailing can be turn into:
...
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