Implement map syntax

corpus/maps.txt

@@ -0,0 +1,79 @@
+==================
+Simple Maps
+==================
+
+map {
+    answer = 42
+}
+
+---
+
+(root
+  (item
+    (statement
+      (open_statement
+        (expression
+          (value
+            (map
+              (identifier)
+              (value
+                (integer)))))))))
+
+==================
+Map Assignment
+==================
+
+x = map {
+    answer = 42
+}
+
+---
+
+(root
+  (item
+    (statement
+      (open_statement
+        (expression
+          (operation
+            (expression
+              (identifier))
+            (operator)
+            (expression
+              (value
+                (map
+                  (identifier)
+                  (value
+                    (integer)))))))))))
+
+==================
+Map Access
+==================
+
+x = map {
+    answer = 42
+}
+
+x.answer
+
+---
+
+(root
+  (item
+    (statement
+      (open_statement
+        (expression
+          (operation
+            (expression
+              (identifier))
+            (operator)
+            (expression
+              (value
+                (map
+                  (identifier)
+                  (value
+                    (integer))))))))))
+  (item
+    (statement
+      (open_statement
+        (expression
+          (identifier))))))

grammar.js

@@ -38,6 +38,7 @@ module.exports = grammar({
       $.boolean,
       $.function,
       $.table,
+      $.map,
     ), 
 
     float: $ => /\d+\.\d*/,
@@ -63,15 +64,22 @@ module.exports = grammar({
       'function',
       optional(seq('<', repeat(seq($.identifier, optional(','))), '>')),
       '{',
-      repeat($.statement),
+      repeat1($.statement),
       '}',
     ),
 
     table: $ => seq(
       'table',
-      seq('<', repeat(seq($.identifier, optional(','))), '>'),
+      seq('<', repeat1(seq($.identifier, optional(','))), '>'),
       '{',
-      optional(repeat($.list)),
+      repeat($.list),
+      '}',
+    ),
+
+    map: $ => seq(
+      'map',
+      '{',
+      repeat(seq($.identifier, "=", $.value)),
       '}',
     ),
 

src/grammar.json

@@ -127,6 +127,10 @@
         {
           "type": "SYMBOL",
           "name": "table"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "map"
         }
       ]
     },
@@ -253,7 +257,7 @@
           "value": "{"
         },
         {
-          "type": "REPEAT",
+          "type": "REPEAT1",
           "content": {
             "type": "SYMBOL",
             "name": "statement"
@@ -280,7 +284,7 @@
               "value": "<"
             },
             {
-              "type": "REPEAT",
+              "type": "REPEAT1",
               "content": {
                 "type": "SEQ",
                 "members": [
@@ -314,19 +318,48 @@
           "value": "{"
         },
         {
-          "type": "CHOICE",
-          "members": [
-            {
-              "type": "REPEAT",
-              "content": {
+          "type": "REPEAT",
+          "content": {
+            "type": "SYMBOL",
+            "name": "list"
+          }
+        },
+        {
+          "type": "STRING",
+          "value": "}"
+        }
+      ]
+    },
+    "map": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "map"
+        },
+        {
+          "type": "STRING",
+          "value": "{"
+        },
+        {
+          "type": "REPEAT",
+          "content": {
+            "type": "SEQ",
+            "members": [
+              {
                 "type": "SYMBOL",
-                "name": "list"
+                "name": "identifier"
+              },
+              {
+                "type": "STRING",
+                "value": "="
+              },
+              {
+                "type": "SYMBOL",
+                "name": "value"
               }
-            },
-            {
-              "type": "BLANK"
-            }
-          ]
+            ]
+          }
         },
         {
           "type": "STRING",

src/node-types.json

@@ -65,7 +65,7 @@
     "fields": {},
     "children": {
       "multiple": true,
-      "required": false,
+      "required": true,
       "types": [
         {
           "type": "identifier",
@@ -112,6 +112,25 @@
       ]
     }
   },
+  {
+    "type": "map",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": false,
+      "types": [
+        {
+          "type": "identifier",
+          "named": true
+        },
+        {
+          "type": "value",
+          "named": true
+        }
+      ]
+    }
+  },
   {
     "type": "open_statement",
     "named": true,
@@ -187,7 +206,7 @@
     "fields": {},
     "children": {
       "multiple": true,
-      "required": false,
+      "required": true,
       "types": [
         {
           "type": "identifier",
@@ -237,6 +256,10 @@
           "type": "list",
           "named": true
         },
+        {
+          "type": "map",
+          "named": true
+        },
         {
           "type": "string",
           "named": true
@@ -320,6 +343,10 @@
     "type": "integer",
     "named": true
   },
+  {
+    "type": "map",
+    "named": false
+  },
   {
     "type": "output",
     "named": false