killed spurious rotate_tac; use auto instead of blast

moved blast tactic to where it is actually needed

fixed bug in "mk_map" for the "fun" case

correct generalization to 3 or more mutually recursive datatypes

provide more guidance, exploiting our knowledge of the goal

fixed issue with bound variables in prem prems + tuning

use right version of "mk_UnIN"

select the right premise in "mk_induct_discharge_prem_prems_tac" instead of relying on backtracking

tuned code before fixing "mk_induct_discharge_prem_prems_tac"

tuned proofs;

merged

polished the induction

put the flat at the right place (to avoid exceptions)

fixed variable exporting problem

compile

added induct tactic

tuning

renamed "mk_UnN" to "mk_UnIN"

merged two commands

allow default values to refer to selector arguments -- this is useful, e.g. for tllist: ttl (TNil x) = TNil x (example by Andreas Lochbihler)

distinguish between nested and nesting BNFs

make tactic more robust in the case where "asm_simp_tac" already finishes the job

derive induction via backward proof, to ensure that the premises are in the right order for constructors like "X x y x" where x and y are mutually recursive

no longer react on global_settings (cf. 34ac36642a31);