go 未知语法错误(好吧是我看不懂)

代码:

type List []interface{}

var testdata = List{
					List{"@expr", "312"},
					List{"+", nil},
					List"@expr", "44"},
					List{"*", nil},
					List{"@expr", "3"}}

缩进什么的好像没啥关系.

报错如下:

.\ast_builder.go:11:5: assignment mismatch: 1 variables but 3 values
.\ast_builder.go:14:10: syntax error: unexpected literal "@expr", expecting comma or }
.\ast_builder.go:16:24: syntax error: unexpected } after top level declaration

求指教