_SDT_ASM_SUBSTR
_SDT_ASM_SUBSTR(\x00) \
#define _SDT_ASM_BLANK _SDT_ASM_SUBSTR(\x20)
#define _SDT_ASM_BODY_1(p,n,...) _SDT_ASM_BODY(p,n,_SDT_ASM_SUBSTR,(__VA_ARGS__))
_SDT_ASM_SUBSTR(_SDT_ARGTMPL(_SDT_A##no))