Add optional_chain named field

Optional chaining property/array access and optional function calls now produce an `optional_chain` named field. When traversing a parsed program, once can retrieve the operator by looking at the source code, indeed, but it seems _hacky_ (in a bad sense).
tree-sitter · Aug 18, 2022 · 186f2ad · 186f2ad
1 parent 3dac6b0
commit 186f2ad
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Showing 7 changed files with 34,600 additions and 34,280 deletions.
diff --git a/grammar.js b/grammar.js
@@ -728,14 +728,16 @@ module.exports = grammar({
     _call_signature: $ => field('parameters', $.formal_parameters),
     _formal_parameter: $ => choice($.pattern, $.assignment_pattern),
 
+    optional_chain: $ => '?.',
+
     call_expression: $ => choice(
       prec('call', seq(
         field('function', $.expression),
         field('arguments', choice($.arguments, $.template_string))
       )),
       prec('member', seq(
         field('function', $.primary_expression),
-        '?.',
+        field('optional_chain', $.optional_chain),
         field('arguments', $.arguments)
       ))
     ),
@@ -753,15 +755,15 @@ module.exports = grammar({
 
     member_expression: $ => prec('member', seq(
       field('object', choice($.expression, $.primary_expression)),
-      choice('.', '?.'),
+      choice('.', field('optional_chain', $.optional_chain)),
       field('property', choice(
         $.private_property_identifier,
         alias($.identifier, $.property_identifier)))
     )),
 
     subscript_expression: $ => prec.right('member', seq(
       field('object', choice($.expression, $.primary_expression)),
-      optional('?.'),
+      optional(field('optional_chain', $.optional_chain)),
       '[', field('index', $._expressions), ']'
     )),
 

diff --git a/queries/highlights.scm b/queries/highlights.scm
@@ -99,7 +99,7 @@
 
 [
   ";"
-  "?."
+  (optional_chain)
   "."
   ","
 ] @punctuation.delimiter

diff --git a/src/grammar.json b/src/grammar.json
@@ -3244,6 +3244,10 @@
         }
       ]
     },
+    "optional_chain": {
+      "type": "STRING",
+      "value": "?."
+    },
     "call_expression": {
       "type": "CHOICE",
       "members": [
@@ -3296,8 +3300,12 @@
                 }
               },
               {
-                "type": "STRING",
-                "value": "?."
+                "type": "FIELD",
+                "name": "optional_chain",
+                "content": {
+                  "type": "SYMBOL",
+                  "name": "optional_chain"
+                }
               },
               {
                 "type": "FIELD",
@@ -3410,8 +3418,12 @@
                 "value": "."
               },
               {
-                "type": "STRING",
-                "value": "?."
+                "type": "FIELD",
+                "name": "optional_chain",
+                "content": {
+                  "type": "SYMBOL",
+                  "name": "optional_chain"
+                }
               }
             ]
           },
@@ -3467,8 +3479,12 @@
             "type": "CHOICE",
             "members": [
               {
-                "type": "STRING",
-                "value": "?."
+                "type": "FIELD",
+                "name": "optional_chain",
+                "content": {
+                  "type": "SYMBOL",
+                  "name": "optional_chain"
+                }
               },
               {
                 "type": "BLANK"

diff --git a/src/node-types.json b/src/node-types.json
@@ -772,6 +772,16 @@
             "named": true
           }
         ]
+      },
+      "optional_chain": {
+        "multiple": false,
+        "required": false,
+        "types": [
+          {
+            "type": "optional_chain",
+            "named": true
+          }
+        ]
       }
     }
   },
@@ -2056,6 +2066,16 @@
           }
         ]
       },
+      "optional_chain": {
+        "multiple": false,
+        "required": false,
+        "types": [
+          {
+            "type": "optional_chain",
+            "named": true
+          }
+        ]
+      },
       "property": {
         "multiple": false,
         "required": true,
@@ -2633,6 +2653,16 @@
             "named": true
           }
         ]
+      },
+      "optional_chain": {
+        "multiple": false,
+        "required": false,
+        "types": [
+          {
+            "type": "optional_chain",
+            "named": true
+          }
+        ]
       }
     }
   },
@@ -3244,10 +3274,6 @@
     "type": "?",
     "named": false
   },
-  {
-    "type": "?.",
-    "named": false
-  },
   {
     "type": "??",
     "named": false
@@ -3424,6 +3450,10 @@
     "type": "of",
     "named": false
   },
+  {
+    "type": "optional_chain",
+    "named": true
+  },
   {
     "type": "private_property_identifier",
     "named": true