Re: [cdt-dev] Is AST a compiler independent tool?

[Chris Recoskie <recoskie@xxxxxxxxxx>]

Yes and no...

The same nodes are generally used to construct the tree, but some compilers have different language features, and so may be associated with different parsers, which may generate a different structure and add new node types (or extend ones that already existed).

Furthermore, macro definitions often change when moving to platform to platform, and if there is conditionally compiled code, then the structure will be different.

Assuming that the same parser is used on "vanilla" C or C++ code without conditional compilation, then for all intents and purposes, the AST will be the same.

===========================
Chris Recoskie
Team Lead, IBM CDT and RDT
IBM Toronto
wang yu <wangyumi@xxxxxxxxx>

wang yu <wangyumi@xxxxxxxxx>
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04/23/2009 01:50 AM

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Subject	[cdt-dev] Is AST a compiler independent tool?

Hello,
If my understanding is correct, AST is a compiler independent tool
which means its layout or structure is exactly identical no matter
which OS platform or compiler is used, right?

Regard,
Yu Wang
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