typedef struct va_start_expression_t va_start_expression_t;
typedef struct va_arg_expression_t va_arg_expression_t;
typedef struct builtin_symbol_expression_t builtin_symbol_expression_t;
+typedef struct builtin_constant_expression_t builtin_constant_expression_t;
+typedef struct builtin_prefetch_expression_t builtin_prefetch_expression_t;
typedef struct classify_type_expression_t classify_type_expression_t;
+typedef struct bitfield_extract_expression_t bitfield_extract_expression_t;
typedef union expression_t expression_t;
typedef struct initializer_base_t initializer_base_t;