Add brack argument

corpus/bracket_argument.txt

@@ -0,0 +1,42 @@
+======================
+Empty bracket argument
+======================
+
+message([[]])
+
+---
+(source_file
+  (command_invocation
+    (identifier)
+    (arguments
+      (argument
+        (bracket_argument
+          (bracket_open)
+          (bracket_close)
+        )
+      )
+    )
+  )
+)
+
+======================
+One bracket argument
+======================
+
+message([[An argument]])
+
+---
+(source_file
+  (command_invocation
+    (identifier)
+    (arguments
+      (argument
+        (bracket_argument
+          (bracket_open)
+          (bracket_content)
+          (bracket_close)
+        )
+      )
+    )
+  )
+)

grammar.js

@@ -5,15 +5,30 @@ module.exports = grammar({
     source_file: $ => repeat($.command_invocation),
 
     line_ending: $ => $.newline,
+    seperation: $ => choice($.space, $.line_ending),
     space: $ => /[ \t]+/,
     newline: $ => /\n/,
     identifier: $ => /[A-Za-z_][A-Za-z0-9_]*/,
 
-    argument: $ => choice($.unquoted_argument),
-    seperation: $ => choice($.space, $.line_ending),
+    argument: $ => choice(
+      $.unquoted_argument,
+      $.bracket_argument,
+    ),
+
+    unquoted_argument: $ => repeat1(/[^ ()#\"\\]/),
+
+    bracket_argument: $ => seq(
+      $.bracket_open,
+      optional($.bracket_content),
+      $.bracket_close,
+    ),
+    bracket_open: $ => seq('[', repeat('='), '['),
+    bracket_content: $ => repeat1(/[^\]]/),
+    bracket_close: $ => seq(']', repeat('='), ']'),
+
 
     arguments: $ => seq($.argument, repeat($._seperated_arguments)),
-    _seperated_arguments: $ => prec.left(1, seq(
+    _seperated_arguments: $ => prec.left(seq(
       repeat1($.seperation),
       optional($.argument)
     )),
@@ -28,6 +43,5 @@ module.exports = grammar({
       ')'
     ),
 
-    unquoted_argument: $ => /[^ ()#\"\\]+/,
   }
 })

src/grammar.json

@@ -12,6 +12,19 @@
       "type": "SYMBOL",
       "name": "newline"
     },
+    "seperation": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "space"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "line_ending"
+        }
+      ]
+    },
     "space": {
       "type": "PATTERN",
       "value": "[ \\t]+"
@@ -30,19 +43,89 @@
         {
           "type": "SYMBOL",
           "name": "unquoted_argument"
-        }
-      ]
-    },
-    "seperation": {
-      "type": "CHOICE",
-      "members": [
-        {
-          "type": "SYMBOL",
-          "name": "space"
         },
         {
           "type": "SYMBOL",
-          "name": "line_ending"
+          "name": "bracket_argument"
+        }
+      ]
+    },
+    "unquoted_argument": {
+      "type": "REPEAT1",
+      "content": {
+        "type": "PATTERN",
+        "value": "[^ ()#\\\"\\\\]"
+      }
+    },
+    "bracket_argument": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "bracket_open"
+        },
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "bracket_content"
+            },
+            {
+              "type": "BLANK"
+            }
+          ]
+        },
+        {
+          "type": "SYMBOL",
+          "name": "bracket_close"
+        }
+      ]
+    },
+    "bracket_open": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "["
+        },
+        {
+          "type": "REPEAT",
+          "content": {
+            "type": "STRING",
+            "value": "="
+          }
+        },
+        {
+          "type": "STRING",
+          "value": "["
+        }
+      ]
+    },
+    "bracket_content": {
+      "type": "REPEAT1",
+      "content": {
+        "type": "PATTERN",
+        "value": "[^\\]]"
+      }
+    },
+    "bracket_close": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "]"
+        },
+        {
+          "type": "REPEAT",
+          "content": {
+            "type": "STRING",
+            "value": "="
+          }
+        },
+        {
+          "type": "STRING",
+          "value": "]"
         }
       ]
     },
@@ -64,7 +147,7 @@
     },
     "_seperated_arguments": {
       "type": "PREC_LEFT",
-      "value": 1,
+      "value": 0,
       "content": {
         "type": "SEQ",
         "members": [
@@ -139,10 +222,6 @@
           "value": ")"
         }
       ]
-    },
-    "unquoted_argument": {
-      "type": "PATTERN",
-      "value": "[^ ()#\\\"\\\\]+"
     }
   },
   "extras": [

src/node-types.json

@@ -7,6 +7,10 @@
       "multiple": false,
       "required": true,
       "types": [
+        {
+          "type": "bracket_argument",
+          "named": true
+        },
         {
           "type": "unquoted_argument",
           "named": true
@@ -33,6 +37,44 @@
       ]
     }
   },
+  {
+    "type": "bracket_argument",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "bracket_close",
+          "named": true
+        },
+        {
+          "type": "bracket_content",
+          "named": true
+        },
+        {
+          "type": "bracket_open",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "bracket_close",
+    "named": true,
+    "fields": {}
+  },
+  {
+    "type": "bracket_content",
+    "named": true,
+    "fields": {}
+  },
+  {
+    "type": "bracket_open",
+    "named": true,
+    "fields": {}
+  },
   {
     "type": "command_invocation",
     "named": true,
@@ -109,6 +151,11 @@
       ]
     }
   },
+  {
+    "type": "unquoted_argument",
+    "named": true,
+    "fields": {}
+  },
   {
     "type": "(",
     "named": false
@@ -117,6 +164,18 @@
     "type": ")",
     "named": false
   },
+  {
+    "type": "=",
+    "named": false
+  },
+  {
+    "type": "[",
+    "named": false
+  },
+  {
+    "type": "]",
+    "named": false
+  },
   {
     "type": "identifier",
     "named": true
@@ -128,9 +187,5 @@
   {
     "type": "space",
     "named": true
-  },
-  {
-    "type": "unquoted_argument",
-    "named": true
   }
 ]