gnu-extension.txt

# GNU EXTENSION GRAMMA

attribute-specifier:
  __ATTRIBUTE__ '(' '(' attribute-list-opt ')' ')'

attribute-list:
  attribute-opt
  attribute-list ',' attribute-opt

attribute:
  attribute-name
  attribute-name '(' ')'
  attribute-name '(' parameter-list ')'

attribute-name:
  identifier

parameter-list:
  identifier
  identifier ',' expression-list
  expression-list-opt

expression-list:
  expression
  expression-list ',' expression


empty: