def p_asm_expression(p):
'''asm_expression : __ASM__ volatile_opt '(' string_literal ')'
| __ASM__ volatile_opt '(' string_literal ':' str_opt_expr_pair_list ')'
| __ASM__ volatile_opt '(' string_literal ':' str_opt_expr_pair_list ':' str_opt_expr_pair_list ')'
| __ASM__ volatile_opt '(' string_literal ':' str_opt_expr_pair_list ':' str_opt_expr_pair_list ':' str_opt_expr_pair_list ')'
'''
# Definitely not ISO C, adapted from example ANTLR GCC parser at
# http://www.antlr.org/grammar/cgram//grammars/GnuCParser.g
# but more lenient (expressions permitted in optional final part, when
# they shouldn't be -- avoids shift/reduce conflict with
# str_opt_expr_pair_list).
p[0] = expressions.UnsupportedExpressionNode("This node is ASM assembler.")
def p_identifier(p):
'''identifier : IDENTIFIER
| IDENTIFIER PP_IDENTIFIER_PASTE identifier
| PP_MACRO_PARAM PP_IDENTIFIER_PASTE identifier
| IDENTIFIER PP_IDENTIFIER_PASTE PP_MACRO_PARAM
| PP_MACRO_PARAM PP_IDENTIFIER_PASTE PP_MACRO_PARAM
'''
if len(p) == 2:
p[0] = expressions.IdentifierExpressionNode(p[1])
else:
# Should it be supported? It wouldn't be very hard to add support.
# Basically, it would involve a new ExpressionNode called
# an IdentifierPasteExpressionNode that took a list of strings and
# ParameterExpressionNodes. Then it would generate code like
# "locals()['%s' + '%s' + ...]" where %s was substituted with the
# elements of the list. I haven't supported it yet because I think
# it's unnecessary and a little too powerful.
p[0] = expressions.UnsupportedExpressionNode("Identifier pasting is " \
"not supported by ctypesgen.")
