forked from lix-project/lix
34 lines
772 B
C++
34 lines
772 B
C++
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#include "fix-expr.hh"
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#include "expr.hh"
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ATerm bottomupRewrite(TermFun & f, ATerm e)
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{
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e = f(e);
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if (ATgetType(e) == AT_APPL) {
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AFun fun = ATgetAFun(e);
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int arity = ATgetArity(fun);
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ATermList args = ATempty;
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for (int i = arity - 1; i >= 0; i--)
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args = ATinsert(args, bottomupRewrite(f, ATgetArgument(e, i)));
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return (ATerm) ATmakeApplList(fun, args);
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}
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if (ATgetType(e) == AT_LIST) {
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ATermList in = (ATermList) e;
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ATermList out = ATempty;
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while (!ATisEmpty(in)) {
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out = ATinsert(out, bottomupRewrite(f, ATgetFirst(in)));
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in = ATgetNext(in);
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}
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return (ATerm) ATreverse(out);
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}
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throw badTerm("cannot rewrite", e);
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}
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