idl groups:
	group:a_t,overwrited from a_t
	group:b_t,overwrited from b_t
		var:a,type:int32_t
	group:c_t,overwrited from b_t
		var:a,type:double
			func:fn
				arg:1
idl vars:
	var:myraw,type:raw
	var:a,type:char
	var:b,type:uchar
	var:c,type:int8_t
	var:d,type:uint8_t
	var:e,type:int16_t
	var:f,type:uint16_t
	var:g,type:int32_t
	var:h,type:uint32_t
	var:i,type:int64_t
	var:j,type:uint64_t
	var:k,type:int32_t
		func:array
			arg:0
	var:l,type:int32_t
		func:array
			arg:2
	var:o,type:int32_t
		func:array
			arg:50
			arg:50
	var:p,type:int32_t
		func:array
			arg:0
			arg:50
	var:r,type:int32_t
		func:fn
	var:s,type:int32_t
		func:fn
			arg:"a"
	var:t,type:int32_t
		func:fn
			arg:"a"
		func:fn1
			arg:"b"
	var:u,type:int32_t
		func:fn
			arg:"a"
			arg:"b"
	var:w,type:string
		func:default
			arg:"hello,world"
idl error: