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Old 11-25-2014, 03:59 AM   #1
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i am trying to run a yaac program it counters error as not exist

i am running a yaac program states that
cc: error: No such file or directory
how to resolve plzz help
Old 11-25-2014, 08:07 AM   #2
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It depends on what you are trying to do.

The is a definition file that contains values for the terminal symbols used to interface with a scanner. This is automatically generated if you use flex to create the scanner.

Depending on the language of course. Flex scanners are not necessarily optimal for a given language (rather sucky for things like python which use white space to determine blocks - possible, but it gets tricky).

Bison+flex is the usual way to generate context free languages (LR(1)), and has some features that allow for the use of ambiguous grammar specifications.

The order of compilation is for flex to be run first (generating the file), then bison/yacc afterward.

This is normally handled by dependencies specified for make.

A very simple example of the combination of bison and flex is shown at

The details on flex are available at

Last edited by jpollard; 11-25-2014 at 08:14 AM.


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