Allow comma separated patterns

tree-sitter · Dec 14, 2021 · e0ab4cd · e0ab4cd
1 parent 9dd2ea3
commit e0ab4cd
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Showing 5 changed files with 25,387 additions and 22,064 deletions.
diff --git a/grammar.js b/grammar.js
@@ -264,7 +264,7 @@ module.exports = grammar({
 
     case_clause: $ => seq(
       'case',
-      field('pattern', $.expression),
+      commaSep1(field('pattern', choice($.expression, $.list_splat_pattern))),
       optional($.if_clause),
       ':',
       field('consequence', $._suite)

diff --git a/src/grammar.json b/src/grammar.json
@@ -925,12 +925,55 @@
           "value": "case"
         },
         {
-          "type": "FIELD",
-          "name": "pattern",
-          "content": {
-            "type": "SYMBOL",
-            "name": "expression"
-          }
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "FIELD",
+              "name": "pattern",
+              "content": {
+                "type": "CHOICE",
+                "members": [
+                  {
+                    "type": "SYMBOL",
+                    "name": "expression"
+                  },
+                  {
+                    "type": "SYMBOL",
+                    "name": "list_splat_pattern"
+                  }
+                ]
+              }
+            },
+            {
+              "type": "REPEAT",
+              "content": {
+                "type": "SEQ",
+                "members": [
+                  {
+                    "type": "STRING",
+                    "value": ","
+                  },
+                  {
+                    "type": "FIELD",
+                    "name": "pattern",
+                    "content": {
+                      "type": "CHOICE",
+                      "members": [
+                        {
+                          "type": "SYMBOL",
+                          "name": "expression"
+                        },
+                        {
+                          "type": "SYMBOL",
+                          "name": "list_splat_pattern"
+                        }
+                      ]
+                    }
+                  }
+                ]
+              }
+            }
+          ]
         },
         {
           "type": "CHOICE",

diff --git a/src/node-types.json b/src/node-types.json
@@ -803,12 +803,16 @@
         ]
       },
       "pattern": {
-        "multiple": false,
+        "multiple": true,
         "required": true,
         "types": [
           {
             "type": "expression",
             "named": true
+          },
+          {
+            "type": "list_splat_pattern",
+            "named": true
           }
         ]
       }