Update prolog samples

lib/linguist/samples.json

@@ -319,6 +319,10 @@
     "Processing": [
       ".pde"
     ],
+    "Prolog": [
+      ".pl",
+      ".prolog"
+    ],
     "Protocol Buffer": [
       ".proto"
     ],
@@ -519,8 +523,8 @@
       ".gemrc"
     ]
   },
-  "tokens_total": 439417,
-  "languages_total": 511,
+  "tokens_total": 439684,
+  "languages_total": 513,
   "tokens": {
     "ABAP": {
       "*/**": 1,
@@ -38586,6 +38590,56 @@
       "PI": 1,
       "TWO_PI": 1
     },
+    "Prolog": {
+      "-": 38,
+      "male": 3,
+      "(": 29,
+      "john": 2,
+      ")": 29,
+      ".": 17,
+      "peter": 3,
+      "female": 2,
+      "vick": 2,
+      "christie": 3,
+      "parents": 4,
+      "brother": 1,
+      "X": 3,
+      "Y": 2,
+      "F": 2,
+      "M": 2,
+      "turing": 1,
+      "Tape0": 2,
+      "Tape": 2,
+      "perform": 4,
+      "q0": 1,
+      "[": 12,
+      "]": 12,
+      "Ls": 12,
+      "Rs": 16,
+      "reverse": 1,
+      "Ls1": 4,
+      "append": 1,
+      "qf": 1,
+      "Q0": 2,
+      "Ls0": 6,
+      "Rs0": 6,
+      "symbol": 3,
+      "Sym": 6,
+      "RsRest": 2,
+      "once": 1,
+      "rule": 1,
+      "Q1": 2,
+      "NewSym": 2,
+      "Action": 2,
+      "action": 4,
+      "|": 7,
+      "Rs1": 2,
+      "b": 2,
+      "left": 4,
+      "stay": 1,
+      "right": 1,
+      "L": 2
+    },
     "Protocol Buffer": {
       "package": 1,
       "tutorial": 1,
@@ -46930,6 +46984,7 @@
     "PostScript": 107,
     "PowerShell": 12,
     "Processing": 74,
+    "Prolog": 267,
     "Protocol Buffer": 63,
     "Python": 5715,
     "R": 175,
@@ -47068,6 +47123,7 @@
     "PostScript": 1,
     "PowerShell": 2,
     "Processing": 1,
+    "Prolog": 2,
     "Protocol Buffer": 1,
     "Python": 7,
     "R": 2,
@@ -47111,5 +47167,5 @@
     "Xtend": 2,
     "YAML": 1
   },
-  "md5": "3969c4c97eb1dc3e7063e0478775dd9a"
+  "md5": "2418026a91f287eda7faac9b75d06236"
 }

samples/Prolog/test-prolog.prolog

@@ -0,0 +1,12 @@
+-/* Prolog test file */
+ -male(john).
+ -male(peter).
+ -
+ -female(vick).
+ -female(christie).
+ -
+ -parents(john, peter, christie).
+ -parents(vick, peter, christie).
+ -
+ -/* X is a brother of Y */
+ -brother(X, Y) :- male(X), parents(X, F, M), parents(Y, F, M).

samples/Prolog/turing.pl

@@ -0,0 +1,21 @@
+-turing(Tape0, Tape) :-
+ -    perform(q0, [], Ls, Tape0, Rs),
+ -    reverse(Ls, Ls1),
+ -    append(Ls1, Rs, Tape).
+ -
+ -perform(qf, Ls, Ls, Rs, Rs) :- !.
+ -perform(Q0, Ls0, Ls, Rs0, Rs) :-
+ -    symbol(Rs0, Sym, RsRest),
+ -    once(rule(Q0, Sym, Q1, NewSym, Action)),
+ -    action(Action, Ls0, Ls1, [NewSym|RsRest], Rs1),
+ -    perform(Q1, Ls1, Ls, Rs1, Rs).
+ -
+ -symbol([], b, []).
+ -symbol([Sym|Rs], Sym, Rs).
+ -
+ -action(left, Ls0, Ls, Rs0, Rs) :- left(Ls0, Ls, Rs0, Rs).
+ -action(stay, Ls, Ls, Rs, Rs).
+ -action(right, Ls0, [Sym|Ls0], [Sym|Rs], Rs).
+ -
+ -left([], [], Rs0, [b|Rs0]).
+ -left([L|Ls], Ls, Rs, [L|Rs]).