| 1 | (* Copyright (C) 2017 Matthew Fluet. |
| 2 | * Copyright (C) 2003-2006 Henry Cejtin, Matthew Fluet, Suresh |
| 3 | * Jagannathan, and Stephen Weeks. |
| 4 | * |
| 5 | * MLton is released under a BSD-style license. |
| 6 | * See the file MLton-LICENSE for details. |
| 7 | *) |
| 8 | |
| 9 | structure Pretty: PRETTY = |
| 10 | struct |
| 11 | |
| 12 | open Layout |
| 13 | |
| 14 | fun casee {default, rules, test} = |
| 15 | let |
| 16 | val rules = |
| 17 | case default of |
| 18 | NONE => rules |
| 19 | | SOME l => Vector.concat [rules, Vector.new1 (str "_", l)] |
| 20 | in |
| 21 | align [seq [str "case ", test, str " of"], |
| 22 | indent (alignPrefix (Vector.toListMap |
| 23 | (rules, fn (lhs, rhs) => |
| 24 | mayAlign [seq [lhs, str " =>"], rhs]), |
| 25 | "| "), |
| 26 | 2)] |
| 27 | end |
| 28 | |
| 29 | fun conApp {arg, con, targs} = |
| 30 | seq [con, |
| 31 | if !Control.showTypes |
| 32 | then tuple (Vector.toList targs) |
| 33 | else empty, |
| 34 | case arg of |
| 35 | NONE => empty |
| 36 | | SOME x => seq [str " ", x]] |
| 37 | |
| 38 | fun handlee {catch, handler, try} = |
| 39 | align [try, |
| 40 | seq [str "handle ", catch, str " => ", handler]] |
| 41 | |
| 42 | fun nest (prefix, x, y) = |
| 43 | align [seq [str prefix, x], |
| 44 | str "in", |
| 45 | indent (y, 3), |
| 46 | str "end"] |
| 47 | |
| 48 | fun lett (d, e) = nest ("let ", d, e) |
| 49 | |
| 50 | fun locall (d, d') = nest ("local ", d, d') |
| 51 | |
| 52 | fun primApp {args, prim, targs} = |
| 53 | seq [prim, |
| 54 | if !Control.showTypes |
| 55 | andalso 0 < Vector.length targs |
| 56 | then list (Vector.toList targs) |
| 57 | else empty, |
| 58 | str " ", |
| 59 | tuple (Vector.toList args)] |
| 60 | |
| 61 | fun raisee exn = seq [str "raise ", exn] |
| 62 | |
| 63 | fun seq es = mayAlign (separateLeft (Vector.toList es, ";")) |
| 64 | |
| 65 | end |