代码：
proc ds2;
data _null_;
method init();
dcl package json j();
dcl int rc tokenType parseFlags;
dcl bigint lineNum colNum;
dcl nvarchar(128) token abc t1;
abc = 'xyz';
t1 = '{"abc" : 1 }';
rc = j.createParser( t1 );
if (rc ne 0) then goto TestError;
* obj open;
j.getNextToken( rc, token, tokenType, parseFlags, lineNum, colNum );
if ( rc ne 0 ) then goto TestError;
PUT "1、" rc= token= tokenType= parseFlags= lineNum= colNum= ;
* obj label;
j.getNextToken( rc, token, tokenType, parseFlags, lineNum, colNum );
if ( rc ne 0 ) then goto TestError;
PUT "2、" rc= token= tokenType= parseFlags= lineNum= colNum= ;
* obj value;
j.getNextToken( rc, token, tokenType, parseFlags, lineNum, colNum );
if ( rc ne 0) then goto TestError;
PUT "3、" rc= token= tokenType= parseFlags= lineNum= colNum= ;
* obj close;
j.getNextToken( rc, token, tokenType, parseFlags, lineNum, colNum );
if ( rc ne 0 ) then goto TestError;
PUT "4、" rc= token= tokenType= parseFlags= lineNum= colNum= ;
Exit:
rc = j.destroyParser();
return;
TestError:
put 'Test ended abnormally.';
goto Exit;
end;
enddata;
run;
quit;
运行日记：
. rc=0 token={ tokenType=64 parseFlags=0 lineNum=1 colNum=1
. rc=0 token=abc tokenType=256 parseFlags=1 lineNum=1 colNum=6
. rc=0 token=1 tokenType=512 parseFlags=3 lineNum=1 colNum=10
. rc=0 token=} tokenType=128 parseFlags=0 lineNum=1 colNum=12
GETNEXTTOKEN Method
Returns the next validated JSON language item or element from the JSON text.
Syntax
Form 1:
package.GETNEXTTOKEN (rc, token-type, parse-flags,);
Form 2:
package.GETNEXTTOKEN (rc, token, token-type, parse-flags,);
Form 3:
package.GETNEXTTOKEN (rc, token, token-type, parse-flags, line-number,
column-number);
Arguments
package
specifies an instance of the JSON package.
rc
specifies the variable to hold the return code value. Possible return code values are as follows:
0 Success
100 The output token argument's maximum length was not large enough and truncation occurred.
101 Done. Depending on the use case, this might or might not be expected.
300 End of text. Depending on the use case, this might or might not be expected.
301 An error occurred while parsing the text.
token-type
token-type can be one of the following values:
4 Boolean true
8 Boolean false
16 Left bracket ( [ )
32 Right bracket ( [ )
64 Left brace ( { )
128 Right brace ( } )
256 String
512 Numeric
1024 Null
parse-flags
parse-flags output value can be an integer flag set consisting of one or more of the following flags:
0x00000001 token is a label in an object
0x00000002 token is not complete
0x00000003 token is an integral numeric
0x00000004 token is a floating point number
token
is the next token or string.
line-number
Updates the given integer variable argument with the line number within the text where the token is located.
Tip You can use the line number to help determine the location of the token within the text.
column-number
Updates the given integer variable argument with the column number within the text where the token is located.
Tip You can use the column number to help determine the location of the token within the text.
Details
All of the arguments to the GETNEXTTOKEN method are passed by reference.
You can use the IS* methods to test the token type.