[cfe-dev] Print Double Precision Values

Zheng Wang jason.wangz at gmail.com
Tue Jul 5 04:14:02 PDT 2011


The VisitFloatingLiteral in StmtPrint is defined as:

        // FIXME: print value more precisely.
        OS << Node->getValueAsApproximateDouble();

This may result in lost of precision when printing double precision value.
 For example,
"-3.247834652034740e3" will be printed as "-3.247835e+03"

Is there any way to *precisely* print out a double precision value (i.e.,
the same as it appears in the source code)?

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