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ASF GitHub Bot commented on THRIFT-3631: ---------------------------------------- Github user mygityf commented on the pull request: https://github.com/apache/thrift/pull/864#issuecomment-184034288 The precision is 15 bits after dot of format casting from double to string in Thrift-cpp-library- json-protocol. But the precision is 16 bits after dot in Thrift-lua-library-json-protocol. So, test with C++ server is break. @nsuke can we modify the precision to 16 bits for C++ server? The solution: To Change code 'str.precision(std::numeric_limits<double>::digits10 + 1);' to 'str.precision(std::numeric_limits<double>::digits10 + 2);' in function doubeToString file TJSONProtocol.cpp at line 524, e.g: before: In C++ TJsonProtocol.cpp: double a = 1.12345678906666663; string astr = doubleToString(a); double b = stringToDouble(astr); the result as below: a = 1.1234567890666667 astr = "1.123456789066667" b = 1.1234567890666669 after changing: the result as below: a = 1.1234567890666667 astr = "1.1234567890666667" b = 1.1234567890666667 This result is expected. > JSON protocol implementation for Lua > ------------------------------------ > > Key: THRIFT-3631 > URL: https://issues.apache.org/jira/browse/THRIFT-3631 > Project: Thrift > Issue Type: Improvement > Components: Lua - Library > Affects Versions: 0.9.3 > Environment: Linux Mac Windows > Reporter: WangYaofu > Assignee: WangYaofu > Fix For: 0.9.4 > > > This is JSON protocol implement for thrift-lua library. > TJsonProtocol.lua is new source of lua for thrift JSON protocol. -- This message was sent by Atlassian JIRA (v6.3.4#6332)