我尝试动态计算Erlang术语
启动Erlang

basho-catah% erl
Erlang R16B03 (erts-5.10.4) [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V5.10.4  (abort with ^G)

创建术语

1> {a,[b,c,d]}.
{a,[b,c,d]}

试着用同样的术语来扫描

2> {ok, Tokens, _ } = erl_scan:string("{a,[b,c,d]}").
{ok,[{'{',1},
     {atom,1,a},
     {',',1},
     {'[',1},
     {atom,1,b},
     {',',1},
     {atom,1,c},
     {',',1},
     {atom,1,d},
     {']',1},
     {'}',1}],
    1}

3> Tokens.
[{'{',1},
 {atom,1,a},
 {',',1},
 {'[',1},
 {atom,1,b},
 {',',1},
 {atom,1,c},
 {',',1},
 {atom,1,d},
 {']',1},
 {'}',1}]

但是它不能解析这个标记化的字符串。

4> Foo = erl_parse:parse(Tokens).
{error,{1,erl_parse,["syntax error before: ","'{'"]}}

知道我哪里做错了吗？