Generate a cond statement from this simplified parse tree fragment p; returns nil if p does not represent a (MEXPR) cond statement.

Generate a cond clause from this simplified parse tree fragment p; returns nil if p does not represent a cond clause.

Generate a list, which may be dot-terminated, from this partial parse tree ‘p’. Note that the function acts recursively and progressively decapitates its argument, so that the argument will not always be a valid parse tree.

Generate a function call from this simplified parse tree fragment p; returns nil if p does not represent a (MEXPR) function call. TODO: I’m not yet certain but it appears that args in mexprs are implicitly quoted; this function does not (yet) do that.

Generate lisp structure from this parse tree p. It is assumed that p has been simplified.

Shortcut macro - the internals of read; or, if you like, read-string. Argument s should be a string representation of a valid Lisp expression.

Parse a string presented as argument into a parse tree which can then be operated upon further.

TODO: write docs

Simplify this parse tree p. If p is an instaparse failure object, throw an ex-info, with p as the value of its :failure key.

read-string interprets strings with leading zeros as octal; strip any from this string s. If what’s left is empty (i.e. there were only zeros, return "0".