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https://issues.apache.org/jira/browse/THRIFT-4156?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16735811#comment-16735811
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James E. King III commented on THRIFT-4156:
-------------------------------------------

With THRIFT-4720 we've removed the runtime library dependency on boost.  This 
would introduce a build-time dependency on boost to build the compiler.  
Boost.Spirit has one of the widest dependency lists in Boost, requiring much of 
the release.  I agree it is a cool idea.  I don't necessarily see flex and 
bison as difficult dependencies compared to boost however, especially in a 
product with a stable IDL.  It would be nice to see this completed if the dev 
team thinks it's worth introducing boost as a dependency for building the 
compiler.  We could link boost static to the compiler to eliminate runtime 
dependencies but you would still need it to build, and that's a pretty big 
dependency.

> Using boost spirit instead of lex and yacc
> ------------------------------------------
>
>                 Key: THRIFT-4156
>                 URL: https://issues.apache.org/jira/browse/THRIFT-4156
>             Project: Thrift
>          Issue Type: Improvement
>          Components: Compiler (General)
>            Reporter: Mike Gresens
>            Priority: Major
>         Attachments: MyService.hpp, MyService.thrift, ast.hpp, 
> doxygen_enum.png, doxygen_service.png, doxygen_struct.png, parser.cpp
>
>
> As a developer I want to use boost spirit to get rid of lex and yacc.
> This kicks dependency to lex, flex, yacc, bison or what ever.
> This makes building easier, because only c++ code must be compiled.
> All grammar is inside the code - all c++. No need to learn ll and yy.



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