| 1 | theory Second_Steps imports Main |
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| 2 | begin |
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| 3 | ML{* |
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| 4 | val pretty_term = Syntax.pretty_term |
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| 5 | val pwriteln = Pretty.writeln |
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| 6 | fun pretty_terms ctxt ts = |
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| 7 | Pretty.block |
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| 8 | (Pretty.commas (map (pretty_term ctxt) ts)) |
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| 9 | *} |
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| 10 | (* Chapter 3 *) |
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| 11 | (* Section 1: Terms and Types *) |
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| 12 | ML{*@{term "(a::nat) + b = c"}*} |
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| 13 | ML{*@{term "\<lambda>x y. x y"}*} |
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| 14 | ML{*let |
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| 15 | val v1 = Var (("x", 3), @{typ bool}) |
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| 16 | val v2 = Var (("x1", 3), @{typ bool}) |
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| 17 | val v3 = Free ("x", @{typ bool}) |
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| 18 | in |
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| 19 | pretty_terms @{context} [v1, v2, v3] |
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| 20 | |> pwriteln |
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| 21 | end*} |
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| 22 | end |
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