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parser:
- call parse_value
- next_token
? <EOF> nop.
parse_value:
- next_token
? <OBJ_BEGIN> call parse_object.
? <ARR_BEGIN> call parse_array.
? <STRING> push. return.
? <BOOLEAN> push. return.
? <NULL> push. return.
? <NUMBER> push. return.
parse_object:
- push table
- next_token
? <STRING> push.
- next_token
? <COLON> nop.
- call parse_value
- set table
- next_token
? <OBJ_END> return.
? <COMMA> loop parse_object.
parse_array:
- push table
- call parse_value
- table append
- next_token
? <COMMA> loop parse_array.
? ] return.
next_token:
- check next character
? { return <OBJ_BEGIN>
? } return <OBJ_END>
? [ return <ARR_BEGIN>
? ] return <ARR_END>
? , return <COMMA>
? : return <COLON>
? [-0-9] gobble number. return <NUMBER>
? " gobble string. return <STRING>
? [ \t\n] eat whitespace.
? n Check "null". return <NULL> or <UNKNOWN>
? t Check "true". return <BOOLEAN> or <UNKNOWN>
? f Check "false". return <BOOLEAN> or <UNKNOWN>
? . return <UNKNOWN>
? \0 return <END>
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