Began implementing "child iterator" interface for Stmts and Exprs. Each
subclass of Stmt will implement child_begin() and child_end(), which will
be used to iterate over all the children (subexpressions/substatements) of
a Stmt object. This will provide for easy traversal over the AST, which
is useful for a variety of purposes.
None of the interfaces to subclasses of Stmt will be changed (other than
adding the child_begin and child_end methods).
The only caveat is that the implementation of subclasses of Stmt will require
colocating all substatements (subexpressions) in an array. This is because
we define child_iterator as Stmt**. All accessor methods to subexpressions
will need to be altered to reflect this new implementation.
This patch includes the typedefs for child_iterator, as well the implementation
for child_begin/child_end for the primary expressions and some postfix
expressions.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@41363 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed