I have looked into AST representations here http://icps.u-strasbg.fr/~pop/gcc-ast.html and I would like to know how I can programmatically access this tree/traverse the nodes of my source.c file? Pseudocode from the link:

char * fnName = IDENTIFIER_POINTER (DECL_NAME (fnDecl));
tree fnBody = DECL_SAVED_TREE (fnDecl);


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