add support for Yarn, #927

Author: AlDanial

Unix/cloc

@@ -9749,6 +9749,7 @@ sub set_constants {                          # {{{1
             'yaml'        => 'YAML'                  ,
             'yml'         => 'YAML'                  ,
             'yang'        => 'Yang'                  ,
+            'yarn'        => 'Yarn'                  ,
             'zig'         => 'Zig'                   ,
             'zsh'         => 'zsh'                   ,
             'rego'        => 'Rego'                  ,
@@ -11635,6 +11636,9 @@ sub set_constants {                          # {{{1
                                 [ 'rm_comments_in_strings', '"', '//', '' ],
                                 [ 'call_regexp_common'  , 'C++'    ],
                             ],
+    'Yarn'               => [
+                                [ 'remove_matches'      , '^\s*//'  ],
+                            ],
     'Zig'                => [
                                 [ 'remove_matches'      , '^\s*//'  ],
                                 [ 'remove_inline'       , '//.*$'   ],
@@ -12212,6 +12216,7 @@ sub set_constants {                          # {{{1
     'yacc'                         =>   1.51,
     'yacc++'                       =>   1.51,
     'YAML'                         =>   0.90,
+    'Yarn'                         => 2.00,
     'Expect'                       => 2.00,
     'Gencat NLS'                   => 1.50,
     'C/C++ Header'                 => 1.00,

Unix/t/00_C.t

@@ -1541,6 +1541,11 @@ my @Tests = (
                     'ref'  => '../tests/outputs/bbf-device.yang.yaml',
                     'args' => '../tests/inputs/bbf-device.yang',
                 },
+                {
+                    'name' => 'Yarn',
+                    'ref'  => '../tests/outputs/guard_talking.yarn.yaml',
+                    'args' => '../tests/inputs/guard_talking.yarn',
+                },
                 {
                     'name' => 'Zig',
                     'ref'  => '../tests/outputs/zir_sema.zig.yaml',

cloc

@@ -9741,6 +9741,7 @@ sub set_constants {                          # {{{1
             'yaml'        => 'YAML'                  ,
             'yml'         => 'YAML'                  ,
             'yang'        => 'Yang'                  ,
+            'yarn'        => 'Yarn'                  ,
             'zig'         => 'Zig'                   ,
             'zsh'         => 'zsh'                   ,
             'rego'        => 'Rego'                  ,
@@ -11627,6 +11628,9 @@ sub set_constants {                          # {{{1
                                 [ 'rm_comments_in_strings', '"', '//', '' ],
                                 [ 'call_regexp_common'  , 'C++'    ],
                             ],
+    'Yarn'               => [
+                                [ 'remove_matches'      , '^\s*//'  ],
+                            ],
     'Zig'                => [
                                 [ 'remove_matches'      , '^\s*//'  ],
                                 [ 'remove_inline'       , '//.*$'   ],
@@ -12204,6 +12208,7 @@ sub set_constants {                          # {{{1
     'yacc'                         =>   1.51,
     'yacc++'                       =>   1.51,
     'YAML'                         =>   0.90,
+    'Yarn'                         => 2.00,
     'Expect'                       => 2.00,
     'Gencat NLS'                   => 1.50,
     'C/C++ Header'                 => 1.00,

tests/inputs/guard_talking.yarn

@@ -0,0 +1,32 @@
+// https://docs.yarnspinner.dev/write-yarn-scripts/scripting-fundamentals/detour
+title: Guard
+---
+Guard: Have I told you my backstory?
+-> Yes.
+	Guard: Oh. Well, then.
+-> No?
+	<<detour Guard_Backstory>>
+Guard: Anyway, you can't come in.
+===
+
+title: Guard_Backstory
+---
+Guard: Do you want the detailed version or the short version?
+    -> Detailed.
+        <<detour Guard_Detailed_Backstory>>
+        Guard: I hope you enjoyed learning all that.. Anyway...
+    -> Short.
+        Guard: Right, well, I was a recruit, then I wasn't.
+===
+
+title: Guard_Detailed_Backstory
+---
+Guard: It all started when I was a mere recruit.
+// (five minutes of exposition omitted)
+// (other stuff happens)
+Guard: Want to hear more?
+    -> Yes.
+    -> No.
+        <<return>>
+Guard: (speaks more garbage)
+===

tests/outputs/guard_talking.yarn.yaml

@@ -0,0 +1,21 @@
+---
+# github.com/AlDanial/cloc
+header : 
+  cloc_url           : github.com/AlDanial/cloc
+  cloc_version       : 2.07
+  elapsed_seconds    : 0.00369501113891602
+  n_files            : 1
+  n_lines            : 32
+  files_per_second   : 270.63517873274
+  lines_per_second   : 8660.32571944767
+  report_file        : ../outputs/guard_talking.yarn.yaml
+'Yarn' :
+  nFiles: 1
+  blank: 2
+  comment: 3
+  code: 27
+SUM: 
+  blank: 2
+  comment: 3
+  code: 27
+  nFiles: 1