Add Prolog Syntax Highlighting

.gitmodules

@@ -260,3 +260,6 @@
 [submodule "assets/syntaxes/02_Extra/vscode-wgsl"]
 	path = assets/syntaxes/02_Extra/vscode-wgsl
 	url = https://github.com/PolyMeilex/vscode-wgsl.git
+[submodule "assets/syntaxes/02_Extra/Prolog"]
+	path = assets/syntaxes/02_Extra/Prolog
+	url = https://github.com/alnkpa/sublimeprolog

CHANGELOG.md

@@ -43,6 +43,7 @@
 - Added auto detect syntax for `.jsonc` #2795 (@mxaddict)
 - Added auto detect syntax for `.aws/{config,credentials}` #2795 (@mxaddict)
 - Add syntax mapping for Wireguard config #2874 (@cyqsimon)
+- Add Prolog syntax, see #2848 (@laalsaas)
 
 ## Themes
 

assets/syntaxes/02_Extra/Prolog

@@ -0,0 +1 @@
+Subproject commit 9e8e142e55557465511338d5b26ca585cb729310

assets/syntaxes/02_Extra/Prolog.sublime-syntax

@@ -0,0 +1,137 @@
+%YAML 1.2
+---
+# http://www.sublimetext.com/docs/3/syntax.html
+name: SWI-Prolog
+comment: This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+file_extensions:
+  - pro
+  - prolog
+  - swiplrc
+scope: source.prolog
+contexts:
+  main:
+    - include: comments
+    - match: (?<=:-)\s*
+      push:
+        - meta_scope: meta.clause.body.prolog
+        - match: (\.)
+          captures:
+            1: keyword.control.clause.bodyend.prolog
+          pop: true
+        - include: comments
+        - include: builtin
+        - include: controlandkeywords
+        - include: atom
+        - include: variable
+        - include: constants
+        - match: .
+          scope: meta.clause.body.prolog
+    - match: '^\s*([a-z][a-zA-Z0-9_]*)(\(?)(?=.*:-.*)'
+      captures:
+        1: entity.name.function.clause.prolog
+        2: punctuation.definition.parameters.begin
+      push:
+        - meta_scope: meta.clause.head.prolog
+        - match: ((\)?))\s*(:-)
+          captures:
+            1: punctuation.definition.parameters.end
+            3: keyword.control.clause.bodybegin.prolog
+          pop: true
+        - include: atom
+        - include: variable
+        - include: constants
+    - match: '^\s*([a-z][a-zA-Z0-9_]*)(\(?)(?=.*-->.*)'
+      captures:
+        1: entity.name.function.dcg.prolog
+        2: punctuation.definition.parameters.begin
+      push:
+        - meta_scope: meta.dcg.head.prolog
+        - match: ((\)?))\s*(-->)
+          captures:
+            1: punctuation.definition.parameters.end
+            3: keyword.control.dcg.bodybegin.prolog
+          pop: true
+        - include: atom
+        - include: variable
+        - include: constants
+    - match: (?<=-->)\s*
+      push:
+        - meta_scope: meta.dcg.body.prolog
+        - match: (\.)
+          captures:
+            1: keyword.control.dcg.bodyend.prolog
+          pop: true
+        - include: comments
+        - include: controlandkeywords
+        - include: atom
+        - include: variable
+        - include: constants
+        - match: .
+          scope: meta.dcg.body.prolog
+    - match: '^\s*([a-zA-Z][a-zA-Z0-9_]*)(\(?)(?!.*(:-|-->).*)'
+      captures:
+        1: entity.name.function.fact.prolog
+        2: punctuation.definition.parameters.begin
+      push:
+        - meta_scope: meta.fact.prolog
+        - match: ((\)?))\s*(\.)(?!\d+)
+          captures:
+            1: punctuation.definition.parameters.end
+            3: keyword.control.fact.end.prolog
+          pop: true
+        - include: atom
+        - include: variable
+        - include: constants
+  atom:
+    - match: '(?<![a-zA-Z0-9_])[a-z][a-zA-Z0-9_]*(?!\s*\(|[a-zA-Z0-9_])'
+      scope: constant.other.atom.simple.prolog
+    - match: "'.*?'"
+      scope: constant.other.atom.quoted.prolog
+    - match: '\[\]'
+      scope: constant.other.atom.emptylist.prolog
+  builtin:
+    - match: \b(op|findall|write|nl|writeln|fail|use_module|module)\b
+      scope: keyword.other
+  comments:
+    - match: "%.*"
+      scope: comment.line.percent-sign.prolog
+    - match: /\*
+      captures:
+        0: punctuation.definition.comment.prolog
+      push:
+        - meta_scope: comment.block.prolog
+        - match: \*/
+          captures:
+            0: punctuation.definition.comment.prolog
+          pop: true
+  constants:
+    - match: '(?<![a-zA-Z]|/)(\d+|(\d+\.\d+))'
+      scope: constant.numeric.integer.prolog
+    - match: '".*?"'
+      scope: string.quoted.double.prolog
+  controlandkeywords:
+    - match: (->)
+      captures:
+        1: keyword.control.if.prolog
+      push:
+        - meta_scope: meta.if.prolog
+        - match: (;)
+          captures:
+            1: keyword.control.else.prolog
+          pop: true
+        - include: main
+        - include: builtin
+        - include: comments
+        - include: atom
+        - include: variable
+        - match: .
+          scope: meta.if.body.prolog
+    - match: "!"
+      scope: keyword.control.cut.prolog
+    - match: (\s(is)\s)|=:=|=?\\?=|\\\+|@?>|@?=?<|\+|\*|\-
+      scope: keyword.operator.prolog
+  variable:
+    - match: "(?<![a-zA-Z0-9_])[_A-Z][a-zA-Z0-9_]*"
+      scope: variable.parameter.uppercase.prolog
+    - match: (?<!\w)_
+      scope: variable.language.anonymous.prolog

tests/syntax-tests/highlighted/Prolog/test.pro

@@ -0,0 +1,34 @@
+% A formulation of Einstein's Riddle (aka Zebra Puzzle) in Prolog (specifically, SWI-Prolog - see http://www.swi-prolog.org/) as appeared on Life International magazine 17/12/1962
+% Source: https://en.wikipedia.org/wiki/Zebra_Puzzle
+
+% Modelling the problem:
+% - Each house is represented by the predicate house/5
+% - The five houses are modelled as a(n) (ordered) list of house(Color, Nationality, Pet, Beverage, Cigaret) in the variable Houses
+% - The predicate solve/2 for solving the riddle is of the form solve(WaterDrinker, ZebraOwner) where WaterDrinker is the nationality of the person who drinks water and ZebraOwner the nationality of the person owning a zebra as a pet
+
+% Expected solution: if the problem is modelled correctly by this program then the only solution set should be:
+% WaterDrinker = norwegian, ZebraOwner = japanese.
+
+% adjacent/3 - A helper function for expressing the "directly next to" relation in a list
+% adjacent(A, B, List) means that either A is directly left of B in List or A is directly right of B in List
+adjacent(A, B, List) :- nextto(A, B, List); nextto(B, A, List).
+
+% solve/2 - The main predicate for solving the puzzle
+solve(WaterDrinker, ZebraOwner) :-
+  length(Houses, 5),                                                          % 1. There are five houses.
+  member(house(red, english, _, _, _), Houses),                               % 2. The Englishman lives in the red house.
+  member(house(_, spanish, dog, _, _), Houses),                               % 3. The Spaniard owns the dog.
+  member(house(green, _, _, coffee, _), Houses),                              % 4. Coffee is drunk in the green house.
+  member(house(_, ukrainian, _, tea, _), Houses),                             % 5. The Ukrainian drinks tea.
+  nextto(house(ivory, _, _, _, _), house(green, _, _, _, _), Houses),         % 6. The green house is immediately to the right of the ivory house.
+  member(house(_, _, snail, _, old_gold), Houses),                            % 7. The Old Gold smoker owns snails.
+  member(house(yellow, _, _, _, kools), Houses),                              % 8. Kools are smoked in the yellow house.
+  nth1(3, Houses, house(_, _, _, milk, _)),                                   % 9. Milk is drunk in the middle house.
+  nth1(1, Houses, house(_, norwegian, _, _, _)),                              % 10. The Norwegian lives in the first house.
+  adjacent(house(_, _, _, _, chesterfields), house(_, _, fox, _, _), Houses), % 11. The man who smokes Chesterfields lives in the house next to the man with the fox.
+  adjacent(house(_, _, _, _, kools), house(_, _, horse, _, _), Houses),       % 12. Kools are smoked in the house next to the house where the horse is kept.
+  member(house(_, _, _, orange_juice, lucky_strike), Houses),                 % 13. The Lucky Strike smoker drinks orange juice.
+  member(house(_, japanese, _, _, parliaments), Houses),                      % 14. The Japanese smokes Parliaments.
+  adjacent(house(_, norwegian, _, _, _), house(blue, _, _, _, _), Houses),    % 15. The Norwegian lives next to the blue house
+  member(house(_, WaterDrinker, _, water, _), Houses),                        % Who (WaterDrinker) drinks water?
+  member(house(_, ZebraOwner, zebra, _, _), Houses).                          % Who (ZebraOwner) owns the zebra?

tests/syntax-tests/source/Prolog/test.pro

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+% A formulation of Einstein's Riddle (aka Zebra Puzzle) in Prolog (specifically, SWI-Prolog - see http://www.swi-prolog.org/) as appeared on Life International magazine 17/12/1962
+% Source: https://en.wikipedia.org/wiki/Zebra_Puzzle
+
+% Modelling the problem:
+% - Each house is represented by the predicate house/5
+% - The five houses are modelled as a(n) (ordered) list of house(Color, Nationality, Pet, Beverage, Cigaret) in the variable Houses
+% - The predicate solve/2 for solving the riddle is of the form solve(WaterDrinker, ZebraOwner) where WaterDrinker is the nationality of the person who drinks water and ZebraOwner the nationality of the person owning a zebra as a pet
+
+% Expected solution: if the problem is modelled correctly by this program then the only solution set should be:
+% WaterDrinker = norwegian, ZebraOwner = japanese.
+
+% adjacent/3 - A helper function for expressing the "directly next to" relation in a list
+% adjacent(A, B, List) means that either A is directly left of B in List or A is directly right of B in List
+adjacent(A, B, List) :- nextto(A, B, List); nextto(B, A, List).
+
+% solve/2 - The main predicate for solving the puzzle
+solve(WaterDrinker, ZebraOwner) :-
+  length(Houses, 5),                                                          % 1. There are five houses.
+  member(house(red, english, _, _, _), Houses),                               % 2. The Englishman lives in the red house.
+  member(house(_, spanish, dog, _, _), Houses),                               % 3. The Spaniard owns the dog.
+  member(house(green, _, _, coffee, _), Houses),                              % 4. Coffee is drunk in the green house.
+  member(house(_, ukrainian, _, tea, _), Houses),                             % 5. The Ukrainian drinks tea.
+  nextto(house(ivory, _, _, _, _), house(green, _, _, _, _), Houses),         % 6. The green house is immediately to the right of the ivory house.
+  member(house(_, _, snail, _, old_gold), Houses),                            % 7. The Old Gold smoker owns snails.
+  member(house(yellow, _, _, _, kools), Houses),                              % 8. Kools are smoked in the yellow house.
+  nth1(3, Houses, house(_, _, _, milk, _)),                                   % 9. Milk is drunk in the middle house.
+  nth1(1, Houses, house(_, norwegian, _, _, _)),                              % 10. The Norwegian lives in the first house.
+  adjacent(house(_, _, _, _, chesterfields), house(_, _, fox, _, _), Houses), % 11. The man who smokes Chesterfields lives in the house next to the man with the fox.
+  adjacent(house(_, _, _, _, kools), house(_, _, horse, _, _), Houses),       % 12. Kools are smoked in the house next to the house where the horse is kept.
+  member(house(_, _, _, orange_juice, lucky_strike), Houses),                 % 13. The Lucky Strike smoker drinks orange juice.
+  member(house(_, japanese, _, _, parliaments), Houses),                      % 14. The Japanese smokes Parliaments.
+  adjacent(house(_, norwegian, _, _, _), house(blue, _, _, _, _), Houses),    % 15. The Norwegian lives next to the blue house
+  member(house(_, WaterDrinker, _, water, _), Houses),                        % Who (WaterDrinker) drinks water?
+  member(house(_, ZebraOwner, zebra, _, _), Houses).                          % Who (ZebraOwner) owns the zebra?