add splat expressions

grammar.js

@@ -9,12 +9,11 @@ module.exports = grammar({
   conflicts: $ => [
       [$.body],
       [$.object_elem, $.variable_expr],
+      [$.attr_splat],
+      [$.full_splat],
   ],
 
-  extras: $ => [
-    $.comment,
-    /\s/,
-  ],
+  extras: $ => [$.comment, /\s/],
 
   rules: {
     config_file: $ => $.body,
@@ -58,9 +57,9 @@ module.exports = grammar({
       $.variable_expr,
       // $.function_call,
       // $.for_expr,
-      // seq($.expr_term, $.index),
-      // seq($.expr_term, $.get_attr),
-      // seq($.expr_term, $.splat),
+      seq($.expr_term, $.index),
+      seq($.expr_term, $.get_attr),
+      seq($.expr_term, $.splat),
       seq('(', $.expression, ')'),
     ),
 
@@ -108,6 +107,15 @@ module.exports = grammar({
       $.expression,
     ),
 
+    index: $ => seq('[', $.expression, ']'),
+
+    get_attr: $ => seq('.', $.identifier),
+
+    splat: $ => choice($.attr_splat, $.full_splat),
+
+    attr_splat: $ => seq('.', '*', repeat($.get_attr)),
+    full_splat: $ => seq('[', '*', ']', repeat(choice($.get_attr, $.index))),
+
     variable_expr: $ => $.identifier,
 
     // http://stackoverflow.com/questions/13014947/regex-to-match-a-c-style-multiline-comment/36328890#36328890

src/grammar.json

@@ -152,6 +152,45 @@
           "type": "SYMBOL",
           "name": "variable_expr"
         },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "expr_term"
+            },
+            {
+              "type": "SYMBOL",
+              "name": "index"
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "expr_term"
+            },
+            {
+              "type": "SYMBOL",
+              "name": "get_attr"
+            }
+          ]
+        },
+        {
+          "type": "SEQ",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "expr_term"
+            },
+            {
+              "type": "SYMBOL",
+              "name": "splat"
+            }
+          ]
+        },
         {
           "type": "SEQ",
           "members": [
@@ -382,6 +421,102 @@
         }
       ]
     },
+    "index": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "["
+        },
+        {
+          "type": "SYMBOL",
+          "name": "expression"
+        },
+        {
+          "type": "STRING",
+          "value": "]"
+        }
+      ]
+    },
+    "get_attr": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "."
+        },
+        {
+          "type": "SYMBOL",
+          "name": "identifier"
+        }
+      ]
+    },
+    "splat": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "attr_splat"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "full_splat"
+        }
+      ]
+    },
+    "attr_splat": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "."
+        },
+        {
+          "type": "STRING",
+          "value": "*"
+        },
+        {
+          "type": "REPEAT",
+          "content": {
+            "type": "SYMBOL",
+            "name": "get_attr"
+          }
+        }
+      ]
+    },
+    "full_splat": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "STRING",
+          "value": "["
+        },
+        {
+          "type": "STRING",
+          "value": "*"
+        },
+        {
+          "type": "STRING",
+          "value": "]"
+        },
+        {
+          "type": "REPEAT",
+          "content": {
+            "type": "CHOICE",
+            "members": [
+              {
+                "type": "SYMBOL",
+                "name": "get_attr"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "index"
+              }
+            ]
+          }
+        }
+      ]
+    },
     "variable_expr": {
       "type": "SYMBOL",
       "name": "identifier"
@@ -455,6 +590,12 @@
     [
       "object_elem",
       "variable_expr"
+    ],
+    [
+      "attr_splat"
+    ],
+    [
+      "full_splat"
     ]
   ],
   "precedences": [],

src/node-types.json

@@ -1,4 +1,19 @@
 [
+  {
+    "type": "attr_splat",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": false,
+      "types": [
+        {
+          "type": "get_attr",
+          "named": true
+        }
+      ]
+    }
+  },
   {
     "type": "attribute",
     "named": true,
@@ -122,21 +137,37 @@
     "named": true,
     "fields": {},
     "children": {
-      "multiple": false,
+      "multiple": true,
       "required": true,
       "types": [
         {
           "type": "collection_value",
           "named": true
         },
+        {
+          "type": "expr_term",
+          "named": true
+        },
         {
           "type": "expression",
           "named": true
         },
+        {
+          "type": "get_attr",
+          "named": true
+        },
+        {
+          "type": "index",
+          "named": true
+        },
         {
           "type": "literal_value",
           "named": true
         },
+        {
+          "type": "splat",
+          "named": true
+        },
         {
           "type": "variable_expr",
           "named": true
@@ -159,6 +190,55 @@
       ]
     }
   },
+  {
+    "type": "full_splat",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": false,
+      "types": [
+        {
+          "type": "get_attr",
+          "named": true
+        },
+        {
+          "type": "index",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "get_attr",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "identifier",
+          "named": true
+        }
+      ]
+    }
+  },
+  {
+    "type": "index",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "expression",
+          "named": true
+        }
+      ]
+    }
+  },
   {
     "type": "literal_value",
     "named": true,
@@ -220,6 +300,25 @@
       ]
     }
   },
+  {
+    "type": "splat",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": true,
+      "types": [
+        {
+          "type": "attr_splat",
+          "named": true
+        },
+        {
+          "type": "full_splat",
+          "named": true
+        }
+      ]
+    }
+  },
   {
     "type": "string_lit",
     "named": true,
@@ -267,10 +366,18 @@
     "type": ")",
     "named": false
   },
+  {
+    "type": "*",
+    "named": false
+  },
   {
     "type": ",",
     "named": false
   },
+  {
+    "type": ".",
+    "named": false
+  },
   {
     "type": ":",
     "named": false