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doc-src/Tutorial/Datatype/lookupempty.ML
changeset 15338
08519594b0e4
parent 15337
628d87767434
child 15339
a7b603bbc1e6
equal
deleted
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15337:628d87767434
15338:08519594b0e4
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Goal "lookup (Trie None []) as = None";
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by(case_tac "as" 1);
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by(Auto_tac);