CAS command question
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01-11-2017, 08:19 PM
Post: #77
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RE: CAS command question
(01-11-2017 06:46 AM)parisse Wrote: I'm really not an expert in the process of parsing. I'm using flex and bison to do that, you can refer to their documentation for much better explanation. In short, the C++ code output from flex reads the strings and cut it into words with a token value according to the rules in the file input_lexer.ll from giac source code (for example "(" has token value T_BEGIN_PAR). Then the C++ code output from bison translate the string into a giac::gen expression by grouping tokens according to the grammar in the file input_parser.yy. During that step, nothing is evaluated. Ok, I get it now. Thank you for the explanation. Graph 3D | QPI | SolveSys |
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