add root attributes

examples/all.d2

@@ -0,0 +1,19 @@
+shape: oval
+label: ten
+constraint: utehu
+icon: huell
+opacity: 1
+fill: red
+stroke: red
+stroke-width: 5
+stroke-dash: 4
+border-radius: 1
+font-color: red
+shadow: true
+multiple: true
+animated: true
+link: https://to
+near: abc
+
+hello
+

grammar.js

@@ -1,11 +1,13 @@
 const PREC = {
   COMMENT: -2,
-  UNQUOTED_STRING: 5,
+  UNQUOTED_STRING: 0,
-  CONTAINER: 9,
+  CONTAINER: 2,
-  CONNECTION: 9,
+  CONNECTION: 2,
-  SHAPE: 11,
+  SHAPE: 3,
-  IDENTIFIER: 12,
+  IDENTIFIER: 0,
-  ARROW: 13,
+  ARROW: 0,
+  ATTRIBUTE: 0,
+  ATTRIBUTE_KEY: 0,
 };
 
 spaces = /[ \t]/;
@@ -18,7 +20,7 @@ module.exports = grammar({
     $.line_comment,
   ],
 
-  word: ($) => $._word,
+  word: ($) => $._identifier,
 
   conflicts: ($) => [
     [$._connection_path, $.container],
@@ -37,7 +39,20 @@ module.exports = grammar({
     source_file: ($) => repeat($._new_root_definition),
 
     _new_root_definition: ($) =>
-      choice($._eol, seq(choice($.shape, $.container, $.connection), $._end)),
+      choice(
+        $._eol,
+        seq(
+          choice(
+            alias($._new_root_attribute, $.attribute),
+            $.shape,
+            $.container,
+            $.connection
+          ),
+          $._end
+        )
+      ),
+
+    // connections
 
     connection: ($) =>
       seq(
@@ -57,6 +72,8 @@ module.exports = grammar({
         $.shape_key
       ),
 
+    // containers
+
     container: ($) =>
       prec(
         PREC.CONTAINER,
@@ -74,6 +91,20 @@ module.exports = grammar({
         )
       ),
 
+    _new_container_block: ($) =>
+      prec(
+        PREC.CONTAINER,
+        seq("{", repeat($._new_container_block_definition), "}")
+      ),
+
+    _new_container_block_definition: ($) =>
+      prec(
+        PREC.CONTAINER,
+        choice($._eol, seq(choice($.shape, $.container, $.connection), $._end))
+      ),
+
+    // shapes
+
     shape: ($) =>
       prec(
         PREC.SHAPE,
@@ -88,35 +119,87 @@ module.exports = grammar({
         )
       ),
 
-    shape_key: ($) =>
+    shape_key: ($) => choice($.string, seq($._identifier, optional($._dash))),
-      choice(
+
-        $.string,
+    _identifier: ($) =>
-        seq(
+      token(prec(PREC.IDENTIFIER, /\-?([\w\d]+|([\w\d]+( +|\-)[\w\d]+)+)/)),
-          token(prec(PREC.IDENTIFIER, /\-?([\w\d]+|([\w\d]+( +|\-)[\w\d]+)+)/)),
-          optional($._dash)
-        )
-      ),
 
     _new_shape_block: ($) =>
       prec(PREC.SHAPE, seq("{", repeat($._new_shape_block_definition), "}")),
 
     _new_shape_block_definition: ($) => prec(PREC.SHAPE, choice($._eol)),
 
-    _new_container_block: ($) =>
+    // attributes
+
+    _new_root_attribute: ($) =>
       prec(
-        PREC.CONTAINER,
+        PREC.ATTRIBUTE,
-        seq("{", repeat($._new_container_block_definition), "}")
+        seq(alias($._root_attr_key, $.attr_key), $._colon, $.attr_value)
       ),
 
-    _new_container_block_definition: ($) =>
+    _root_attr_key: ($) =>
-      prec(
+      choice(
-        PREC.CONTAINER,
+        "direction",
-        choice($._eol, seq(choice($.shape, $.container, $.connection), $._end))
+        // reserved but doesn't affected for root
+        alias(
+          choice(
+            "shape",
+            "label",
+            "constraint",
+            "icon",
+            $._common_style_attr_key,
+            $._text_attr_key
+          ),
+          $.reserved
+        )
       ),
 
+    _shape_attr_key: ($) =>
+      prec(
+        PREC.ATTRIBUTE_KEY,
+        choice(
+          "shape",
+          "label",
+          // sql
+          "constraint",
+          // image
+          "icon",
+          "width",
+          "height"
+        )
+      ),
+
+    _style_attr_key: ($) => choice($._common_style_attr_key, "3d"),
+
+    _common_style_attr_key: ($) =>
+      choice(
+        "opacity",
+        "fill",
+        "stroke",
+        "stroke-width",
+        "stroke-dash",
+        "border-radius",
+        "font-color",
+        "shadow",
+        "multiple",
+        "animated",
+        "link"
+      ),
+
+    _text_attr_key: ($) => "near",
+
+    _connection_attr_key: ($) => choice("source-arrowhead", "target-arrowhead"),
+
+    //
+
+    label: ($) => choice($.string, $._unquoted_string),
+
+    attr_value: ($) => seq(choice($.string, $._unquoted_string)),
+
     // --------------------------------------------
 
     // source_file: ($) => repeat($._root_definition),
+    /*
 
     _root_definition: ($) =>
       choice(
@@ -148,24 +231,6 @@ module.exports = grammar({
         $.shape_key
       ),
 
-    _dash: ($) => token.immediate("-"),
-
-    label: ($) => choice($.string, $._unquoted_string),
-
-    attr_value: ($) => seq(spaces, choice($.string, $._unquoted_string)),
-
-    _root_attribute: ($) =>
-      choice(
-        seq(
-          alias($._root_attr_key, $.attr_key),
-          $._colon,
-          $.attr_value,
-          $._end
-        ),
-        alias(seq($._shape_attribute, $._end), $.invalid)
-      ),
-
-    _root_attr_key: ($) => "direction",
 
     _shape_block: ($) =>
       seq(
@@ -211,38 +276,9 @@ module.exports = grammar({
 
     _connection_attribute: ($) =>
       seq(alias($._connection_attr_key, $.attr_key), $._colon, $.attr_value),
+    */
 
-    _shape_attr_key: ($) =>
+    _dash: ($) => token.immediate("-"),
-      choice(
-        "shape",
-        "label",
-        // sql
-        "constraint",
-        // image
-        "icon",
-        "width",
-        "height"
-      ),
-
-    _style_attr_key: ($) =>
-      choice(
-        "opacity",
-        "fill",
-        "stroke",
-        "stroke-width",
-        "stroke-dash",
-        "border-radius",
-        "font-color",
-        "shadow",
-        "multiple",
-        "animated",
-        "3d",
-        "link"
-      ),
-
-    _text_attr_key: ($) => "near",
-
-    _connection_attr_key: ($) => choice("source-arrowhead", "target-arrowhead"),
 
     _colon: ($) => seq(":"),
 

queries/highlights.scm

@@ -2,7 +2,7 @@
 ;-------------------------------------------------------------------------------
 
 (ERROR) @error
-(invalid (_) @error)
+; (invalid (_) @error)
 ;-------------------------------------------------------------------------------
 
 (container_key) @constant
@@ -15,7 +15,7 @@
 (container_key (string) @string.special)
 (shape_key (string) @string)
 (label) @string 
-(attr_value) @string
+; (attr_value) @string
 
 ; Comments
 ;-------------------------------------------------------------------------------
@@ -42,4 +42,4 @@
 ;-------------------------------------------------------------------------------
 
 (ERROR) @error
-(invalid (_) @error)
+; (invalid (_) @error)

src/grammar.json

@@ -1,6 +1,6 @@
 {
   "name": "d2",
-  "word": "_word",
+  "word": "_identifier",
   "rules": {
     "source_file": {
       "type": "REPEAT",
@@ -22,6 +22,15 @@
             {
               "type": "CHOICE",
               "members": [
+                {
+                  "type": "ALIAS",
+                  "content": {
+                    "type": "SYMBOL",
+                    "name": "_new_root_attribute"
+                  },
+                  "named": true,
+                  "value": "attribute"
+                },
                 {
                   "type": "SYMBOL",
                   "name": "shape"
@@ -97,7 +106,7 @@
           "type": "REPEAT",
           "content": {
             "type": "PREC",
-            "value": 9,
+            "value": 2,
             "content": {
               "type": "SEQ",
               "members": [
@@ -126,7 +135,7 @@
     },
     "container": {
       "type": "PREC",
-      "value": 9,
+      "value": 2,
       "content": {
         "type": "SEQ",
         "members": [
@@ -230,9 +239,72 @@
         ]
       }
     },
+    "_new_container_block": {
+      "type": "PREC",
+      "value": 2,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "STRING",
+            "value": "{"
+          },
+          {
+            "type": "REPEAT",
+            "content": {
+              "type": "SYMBOL",
+              "name": "_new_container_block_definition"
+            }
+          },
+          {
+            "type": "STRING",
+            "value": "}"
+          }
+        ]
+      }
+    },
+    "_new_container_block_definition": {
+      "type": "PREC",
+      "value": 2,
+      "content": {
+        "type": "CHOICE",
+        "members": [
+          {
+            "type": "SYMBOL",
+            "name": "_eol"
+          },
+          {
+            "type": "SEQ",
+            "members": [
+              {
+                "type": "CHOICE",
+                "members": [
+                  {
+                    "type": "SYMBOL",
+                    "name": "shape"
+                  },
+                  {
+                    "type": "SYMBOL",
+                    "name": "container"
+                  },
+                  {
+                    "type": "SYMBOL",
+                    "name": "connection"
+                  }
+                ]
+              },
+              {
+                "type": "SYMBOL",
+                "name": "_end"
+              }
+            ]
+          }
+        ]
+      }
+    },
     "shape": {
       "type": "PREC",
-      "value": 11,
+      "value": 3,
       "content": {
         "type": "SEQ",
         "members": [
@@ -318,15 +390,8 @@
           "type": "SEQ",
           "members": [
             {
-              "type": "TOKEN",
+              "type": "SYMBOL",
-              "content": {
+              "name": "_identifier"
-                "type": "PREC",
-                "value": 12,
-                "content": {
-                  "type": "PATTERN",
-                  "value": "\\-?([\\w\\d]+|([\\w\\d]+( +|\\-)[\\w\\d]+)+)"
-                }
-              }
             },
             {
               "type": "CHOICE",
@@ -344,9 +409,20 @@
         }
       ]
     },
+    "_identifier": {
+      "type": "TOKEN",
+      "content": {
+        "type": "PREC",
+        "value": 0,
+        "content": {
+          "type": "PATTERN",
+          "value": "\\-?([\\w\\d]+|([\\w\\d]+( +|\\-)[\\w\\d]+)+)"
+        }
+      }
+    },
     "_new_shape_block": {
       "type": "PREC",
-      "value": 11,
+      "value": 3,
       "content": {
         "type": "SEQ",
         "members": [
@@ -370,7 +446,7 @@
     },
     "_new_shape_block_definition": {
       "type": "PREC",
-      "value": 11,
+      "value": 3,
       "content": {
         "type": "CHOICE",
         "members": [
@@ -381,656 +457,122 @@
         ]
       }
     },
-    "_new_container_block": {
+    "_new_root_attribute": {
       "type": "PREC",
-      "value": 9,
+      "value": 0,
       "content": {
         "type": "SEQ",
         "members": [
           {
-            "type": "STRING",
+            "type": "ALIAS",
-            "value": "{"
-          },
-          {
-            "type": "REPEAT",
             "content": {
               "type": "SYMBOL",
-              "name": "_new_container_block_definition"
+              "name": "_root_attr_key"
-            }
+            },
+            "named": true,
+            "value": "attr_key"
           },
-          {
-            "type": "STRING",
-            "value": "}"
-          }
-        ]
-      }
-    },
-    "_new_container_block_definition": {
-      "type": "PREC",
-      "value": 9,
-      "content": {
-        "type": "CHOICE",
-        "members": [
           {
             "type": "SYMBOL",
-            "name": "_eol"
+            "name": "_colon"
           },
           {
-            "type": "SEQ",
+            "type": "SYMBOL",
-            "members": [
+            "name": "attr_value"
-              {
-                "type": "CHOICE",
-                "members": [
-                  {
-                    "type": "SYMBOL",
-                    "name": "shape"
-                  },
-                  {
-                    "type": "SYMBOL",
-                    "name": "container"
-                  },
-                  {
-                    "type": "SYMBOL",
-                    "name": "connection"
-                  }
-                ]
-              },
-              {
-                "type": "SYMBOL",
-                "name": "_end"
-              }
-            ]
           }
         ]
       }
     },
-    "_root_definition": {
-      "type": "CHOICE",
-      "members": [
-        {
-          "type": "SYMBOL",
-          "name": "_emptyline"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "_root_attribute"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "connection"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "_shape_definition"
-        }
-      ]
-    },
-    "_shape_definition": {
-      "type": "SEQ",
-      "members": [
-        {
-          "type": "SYMBOL",
-          "name": "_shape_path"
-        },
-        {
-          "type": "CHOICE",
-          "members": [
-            {
-              "type": "CHOICE",
-              "members": [
-                {
-                  "type": "SEQ",
-                  "members": [
-                    {
-                      "type": "SYMBOL",
-                      "name": "dot"
-                    },
-                    {
-                      "type": "SYMBOL",
-                      "name": "_shape_attribute"
-                    }
-                  ]
-                },
-                {
-                  "type": "SEQ",
-                  "members": [
-                    {
-                      "type": "CHOICE",
-                      "members": [
-                        {
-                          "type": "SEQ",
-                          "members": [
-                            {
-                              "type": "SYMBOL",
-                              "name": "_colon"
-                            },
-                            {
-                              "type": "CHOICE",
-                              "members": [
-                                {
-                                  "type": "SEQ",
-                                  "members": [
-                                    {
-                                      "type": "PATTERN",
-                                      "value": "[ \\t]"
-                                    },
-                                    {
-                                      "type": "SYMBOL",
-                                      "name": "label"
-                                    }
-                                  ]
-                                },
-                                {
-                                  "type": "BLANK"
-                                }
-                              ]
-                            }
-                          ]
-                        },
-                        {
-                          "type": "BLANK"
-                        }
-                      ]
-                    },
-                    {
-                      "type": "CHOICE",
-                      "members": [
-                        {
-                          "type": "ALIAS",
-                          "content": {
-                            "type": "SYMBOL",
-                            "name": "_shape_block"
-                          },
-                          "named": true,
-                          "value": "block"
-                        },
-                        {
-                          "type": "BLANK"
-                        }
-                      ]
-                    }
-                  ]
-                }
-              ]
-            },
-            {
-              "type": "BLANK"
-            }
-          ]
-        },
-        {
-          "type": "SYMBOL",
-          "name": "_end"
-        }
-      ]
-    },
-    "_shape_path": {
-      "type": "SEQ",
-      "members": [
-        {
-          "type": "PATTERN",
-          "value": "[ \\t]"
-        },
-        {
-          "type": "REPEAT",
-          "content": {
-            "type": "SEQ",
-            "members": [
-              {
-                "type": "ALIAS",
-                "content": {
-                  "type": "SYMBOL",
-                  "name": "shape_key"
-                },
-                "named": true,
-                "value": "container_key"
-              },
-              {
-                "type": "PATTERN",
-                "value": "[ \\t]"
-              },
-              {
-                "type": "SYMBOL",
-                "name": "dot"
-              },
-              {
-                "type": "PATTERN",
-                "value": "[ \\t]"
-              }
-            ]
-          }
-        },
-        {
-          "type": "SYMBOL",
-          "name": "shape_key"
-        }
-      ]
-    },
-    "_dash": {
-      "type": "IMMEDIATE_TOKEN",
-      "content": {
-        "type": "STRING",
-        "value": "-"
-      }
-    },
-    "label": {
-      "type": "CHOICE",
-      "members": [
-        {
-          "type": "SYMBOL",
-          "name": "string"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "_unquoted_string"
-        }
-      ]
-    },
-    "attr_value": {
-      "type": "SEQ",
-      "members": [
-        {
-          "type": "PATTERN",
-          "value": "[ \\t]"
-        },
-        {
-          "type": "CHOICE",
-          "members": [
-            {
-              "type": "SYMBOL",
-              "name": "string"
-            },
-            {
-              "type": "SYMBOL",
-              "name": "_unquoted_string"
-            }
-          ]
-        }
-      ]
-    },
-    "_root_attribute": {
-      "type": "CHOICE",
-      "members": [
-        {
-          "type": "SEQ",
-          "members": [
-            {
-              "type": "ALIAS",
-              "content": {
-                "type": "SYMBOL",
-                "name": "_root_attr_key"
-              },
-              "named": true,
-              "value": "attr_key"
-            },
-            {
-              "type": "SYMBOL",
-              "name": "_colon"
-            },
-            {
-              "type": "SYMBOL",
-              "name": "attr_value"
-            },
-            {
-              "type": "SYMBOL",
-              "name": "_end"
-            }
-          ]
-        },
-        {
-          "type": "ALIAS",
-          "content": {
-            "type": "SEQ",
-            "members": [
-              {
-                "type": "SYMBOL",
-                "name": "_shape_attribute"
-              },
-              {
-                "type": "SYMBOL",
-                "name": "_end"
-              }
-            ]
-          },
-          "named": true,
-          "value": "invalid"
-        }
-      ]
-    },
     "_root_attr_key": {
-      "type": "STRING",
+      "type": "CHOICE",
-      "value": "direction"
-    },
-    "_shape_block": {
-      "type": "SEQ",
       "members": [
-        {
-          "type": "PATTERN",
-          "value": "[ \\t]"
-        },
         {
           "type": "STRING",
-          "value": "{"
+          "value": "direction"
         },
         {
-          "type": "REPEAT",
+          "type": "ALIAS",
           "content": {
             "type": "CHOICE",
             "members": [
               {
-                "type": "SYMBOL",
+                "type": "STRING",
-                "name": "_emptyline"
+                "value": "shape"
               },
               {
-                "type": "SEQ",
+                "type": "STRING",
-                "members": [
+                "value": "label"
-                  {
+              },
-                    "type": "PATTERN",
+              {
-                    "value": "[ \\t]"
+                "type": "STRING",
-                  },
+                "value": "constraint"
-                  {
+              },
-                    "type": "SYMBOL",
+              {
-                    "name": "_shape_block_definition"
+                "type": "STRING",
-                  }
+                "value": "icon"
-                ]
+              },
+              {
+                "type": "SYMBOL",
+                "name": "_common_style_attr_key"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "_text_attr_key"
               }
             ]
-          }
-        },
-        {
-          "type": "CHOICE",
-          "members": [
-            {
-              "type": "SEQ",
-              "members": [
-                {
-                  "type": "SYMBOL",
-                  "name": "_shape_block_definition"
-                },
-                {
-                  "type": "CHOICE",
-                  "members": [
-                    {
-                      "type": "SYMBOL",
-                      "name": "_end"
-                    },
-                    {
-                      "type": "BLANK"
-                    }
-                  ]
-                }
-              ]
-            },
-            {
-              "type": "BLANK"
-            }
-          ]
-        },
-        {
-          "type": "PATTERN",
-          "value": "[ \\t]"
-        },
-        {
-          "type": "STRING",
-          "value": "}"
-        }
-      ]
-    },
-    "_shape_block_definition": {
-      "type": "CHOICE",
-      "members": [
-        {
-          "type": "SYMBOL",
-          "name": "connection"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "_shape_definition"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "_shape_attribute"
-        }
-      ]
-    },
-    "_shape_attribute": {
-      "type": "CHOICE",
-      "members": [
-        {
-          "type": "SEQ",
-          "members": [
-            {
-              "type": "ALIAS",
-              "content": {
-                "type": "SYMBOL",
-                "name": "_shape_attr_key"
-              },
-              "named": true,
-              "value": "attr_key"
-            },
-            {
-              "type": "SYMBOL",
-              "name": "_colon"
-            },
-            {
-              "type": "SYMBOL",
-              "name": "attr_value"
-            }
-          ]
-        },
-        {
-          "type": "SYMBOL",
-          "name": "_style_attribute"
-        }
-      ]
-    },
-    "_style_attribute": {
-      "type": "SEQ",
-      "members": [
-        {
-          "type": "ALIAS",
-          "content": {
-            "type": "STRING",
-            "value": "style"
           },
           "named": true,
-          "value": "attr_key"
+          "value": "reserved"
-        },
-        {
-          "type": "CHOICE",
-          "members": [
-            {
-              "type": "SEQ",
-              "members": [
-                {
-                  "type": "SYMBOL",
-                  "name": "dot"
-                },
-                {
-                  "type": "SYMBOL",
-                  "name": "_inner_style_attribute"
-                }
-              ]
-            },
-            {
-              "type": "SEQ",
-              "members": [
-                {
-                  "type": "SYMBOL",
-                  "name": "_colon"
-                },
-                {
-                  "type": "ALIAS",
-                  "content": {
-                    "type": "SYMBOL",
-                    "name": "_style_attr_block"
-                  },
-                  "named": true,
-                  "value": "block"
-                }
-              ]
-            }
-          ]
-        }
-      ]
-    },
-    "_style_attr_block": {
-      "type": "SEQ",
-      "members": [
-        {
-          "type": "PATTERN",
-          "value": "[ \\t]"
-        },
-        {
-          "type": "STRING",
-          "value": "{"
-        },
-        {
-          "type": "PATTERN",
-          "value": "[ \\t]"
-        },
-        {
-          "type": "REPEAT",
-          "content": {
-            "type": "CHOICE",
-            "members": [
-              {
-                "type": "SYMBOL",
-                "name": "_emptyline"
-              },
-              {
-                "type": "SEQ",
-                "members": [
-                  {
-                    "type": "SYMBOL",
-                    "name": "_inner_style_attribute"
-                  },
-                  {
-                    "type": "SYMBOL",
-                    "name": "_end"
-                  }
-                ]
-              }
-            ]
-          }
-        },
-        {
-          "type": "CHOICE",
-          "members": [
-            {
-              "type": "SEQ",
-              "members": [
-                {
-                  "type": "SYMBOL",
-                  "name": "_inner_style_attribute"
-                },
-                {
-                  "type": "CHOICE",
-                  "members": [
-                    {
-                      "type": "SYMBOL",
-                      "name": "_end"
-                    },
-                    {
-                      "type": "BLANK"
-                    }
-                  ]
-                }
-              ]
-            },
-            {
-              "type": "BLANK"
-            }
-          ]
-        },
-        {
-          "type": "PATTERN",
-          "value": "[ \\t]"
-        },
-        {
-          "type": "STRING",
-          "value": "}"
-        }
-      ]
-    },
-    "_inner_style_attribute": {
-      "type": "SEQ",
-      "members": [
-        {
-          "type": "PATTERN",
-          "value": "[ \\t]"
-        },
-        {
-          "type": "ALIAS",
-          "content": {
-            "type": "SYMBOL",
-            "name": "_style_attr_key"
-          },
-          "named": true,
-          "value": "attr_key"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "_colon"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "attr_value"
-        }
-      ]
-    },
-    "_connection_attribute": {
-      "type": "SEQ",
-      "members": [
-        {
-          "type": "ALIAS",
-          "content": {
-            "type": "SYMBOL",
-            "name": "_connection_attr_key"
-          },
-          "named": true,
-          "value": "attr_key"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "_colon"
-        },
-        {
-          "type": "SYMBOL",
-          "name": "attr_value"
         }
       ]
     },
     "_shape_attr_key": {
+      "type": "PREC",
+      "value": 0,
+      "content": {
+        "type": "CHOICE",
+        "members": [
+          {
+            "type": "STRING",
+            "value": "shape"
+          },
+          {
+            "type": "STRING",
+            "value": "label"
+          },
+          {
+            "type": "STRING",
+            "value": "constraint"
+          },
+          {
+            "type": "STRING",
+            "value": "icon"
+          },
+          {
+            "type": "STRING",
+            "value": "width"
+          },
+          {
+            "type": "STRING",
+            "value": "height"
+          }
+        ]
+      }
+    },
+    "_style_attr_key": {
       "type": "CHOICE",
       "members": [
         {
-          "type": "STRING",
+          "type": "SYMBOL",
-          "value": "shape"
+          "name": "_common_style_attr_key"
         },
         {
           "type": "STRING",
-          "value": "label"
+          "value": "3d"
-        },
-        {
-          "type": "STRING",
-          "value": "constraint"
-        },
-        {
-          "type": "STRING",
-          "value": "icon"
-        },
-        {
-          "type": "STRING",
-          "value": "width"
-        },
-        {
-          "type": "STRING",
-          "value": "height"
         }
       ]
     },
-    "_style_attr_key": {
+    "_common_style_attr_key": {
       "type": "CHOICE",
       "members": [
         {
@@ -1073,10 +615,6 @@
           "type": "STRING",
           "value": "animated"
         },
-        {
-          "type": "STRING",
-          "value": "3d"
-        },
         {
           "type": "STRING",
           "value": "link"
@@ -1100,6 +638,44 @@
         }
       ]
     },
+    "label": {
+      "type": "CHOICE",
+      "members": [
+        {
+          "type": "SYMBOL",
+          "name": "string"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "_unquoted_string"
+        }
+      ]
+    },
+    "attr_value": {
+      "type": "SEQ",
+      "members": [
+        {
+          "type": "CHOICE",
+          "members": [
+            {
+              "type": "SYMBOL",
+              "name": "string"
+            },
+            {
+              "type": "SYMBOL",
+              "name": "_unquoted_string"
+            }
+          ]
+        }
+      ]
+    },
+    "_dash": {
+      "type": "IMMEDIATE_TOKEN",
+      "content": {
+        "type": "STRING",
+        "value": "-"
+      }
+    },
     "_colon": {
       "type": "SEQ",
       "members": [
@@ -1122,7 +698,7 @@
       "type": "TOKEN",
       "content": {
         "type": "PREC",
-        "value": 13,
+        "value": 0,
         "content": {
           "type": "CHOICE",
           "members": [
@@ -1166,7 +742,7 @@
       "type": "TOKEN",
       "content": {
         "type": "PREC",
-        "value": 5,
+        "value": 0,
         "content": {
           "type": "PATTERN",
           "value": "[\\w\\-?!]([^'\"`\\n;{}]*[\\w\\-?!])?"

src/node-types.json

@@ -2,7 +2,17 @@
   {
     "type": "attr_key",
     "named": true,
-    "fields": {}
+    "fields": {},
+    "children": {
+      "multiple": false,
+      "required": false,
+      "types": [
+        {
+          "type": "reserved",
+          "named": true
+        }
+      ]
+    }
   },
   {
     "type": "attr_value",
@@ -20,12 +30,12 @@
     }
   },
   {
-    "type": "block",
+    "type": "attribute",
     "named": true,
     "fields": {},
     "children": {
       "multiple": true,
-      "required": false,
+      "required": true,
       "types": [
         {
           "type": "attr_key",
@@ -34,11 +44,18 @@
         {
           "type": "attr_value",
           "named": true
-        },
+        }
-        {
+      ]
-          "type": "block",
+    }
-          "named": true
+  },
-        },
+  {
+    "type": "block",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": false,
+      "types": [
         {
           "type": "connection",
           "named": true
@@ -47,25 +64,9 @@
           "type": "container",
           "named": true
         },
-        {
-          "type": "container_key",
-          "named": true
-        },
-        {
-          "type": "dot",
-          "named": true
-        },
-        {
-          "type": "label",
-          "named": true
-        },
         {
           "type": "shape",
           "named": true
-        },
-        {
-          "type": "shape_key",
-          "named": true
         }
       ]
     }
@@ -151,33 +152,6 @@
       ]
     }
   },
-  {
-    "type": "invalid",
-    "named": true,
-    "fields": {},
-    "children": {
-      "multiple": true,
-      "required": false,
-      "types": [
-        {
-          "type": "attr_key",
-          "named": true
-        },
-        {
-          "type": "attr_value",
-          "named": true
-        },
-        {
-          "type": "block",
-          "named": true
-        },
-        {
-          "type": "dot",
-          "named": true
-        }
-      ]
-    }
-  },
   {
     "type": "label",
     "named": true,
@@ -193,6 +167,11 @@
       ]
     }
   },
+  {
+    "type": "reserved",
+    "named": true,
+    "fields": {}
+  },
   {
     "type": "shape",
     "named": true,
@@ -239,6 +218,10 @@
       "multiple": true,
       "required": false,
       "types": [
+        {
+          "type": "attribute",
+          "named": true
+        },
         {
           "type": "connection",
           "named": true
@@ -307,6 +290,10 @@
     "type": "constraint",
     "named": false
   },
+  {
+    "type": "direction",
+    "named": false
+  },
   {
     "type": "dot",
     "named": true

test/corpus/attributes.txt

@@ -0,0 +1,45 @@
+================================================================================
+Root attribute
+================================================================================
+direction: value
+
+shape: oval
+label: ten
+constraint: utehu
+icon: huell
+opacity: 1
+fill: red
+stroke: red
+stroke-width: 5
+stroke-dash: 4
+border-radius: 1
+font-color: red
+shadow: true
+multiple: true
+animated: true
+link: https://to
+near: abc
+
+--------------------------------------------------------------------------------
+
+(source_file
+  (attribute (attr_key) (attr_value))
+
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+  (attribute (attr_key (reserved)) (attr_value))
+)
+