Implement select expression

corpus/lists.txt

@@ -51,7 +51,6 @@ x = foobar.0
 
 ---
 
-
 (root
   (item
     (statement

corpus/tables.txt

@@ -65,6 +65,10 @@ select number from foobar where text == 'answer'
   (item
     (statement
       (open_statement
+        (expression
+          (select
+            (identifier)
+            (identifier)
             (expression
               (operation
                 (expression
@@ -72,20 +76,8 @@ select number from foobar where text == 'answer'
                 (operator)
                 (expression
                   (value
-                (table
+                    (string)))))))))))
-                  (identifier)
+
-                  (identifier)
-                  (list
-                    (value
-                      (string))
-                    (value
-                      (integer)))))))))))
-  (item
-    (statement
-      (open_statement
-        (expression
-          (value
-            (42)))))))
 
 ==================
 Table Insert

grammar.js

@@ -28,6 +28,7 @@ module.exports = grammar({
       $.operation,
       $.control_flow,
       $.tool,
+      $.select,
     ),
 
     identifier: $ => /[a-z|_|.]+[0-9]?/,
@@ -86,7 +87,7 @@ module.exports = grammar({
       '}',
     ),
 
-    operator: $ => prec(2, choice(
+    operator: $ => choice(
       '=',
       '+',
       '-',
@@ -105,7 +106,7 @@ module.exports = grammar({
       'select',
       'from',
       'where',
-    )),
+    ),
 
     operation: $ => prec.right(seq(
       $.expression,
@@ -113,6 +114,16 @@ module.exports = grammar({
       $.expression,
     )),
 
+    select: $ => prec.right(seq(
+      'select',
+      $.identifier,
+      'from',
+      $.identifier,
+      optional(
+        seq('where', $.expression)
+      ),
+    )),
+
     control_flow: $ => prec.right(seq(
       'if',
       $.expression,

src/grammar.json

@@ -106,6 +106,10 @@
         {
           "type": "SYMBOL",
           "name": "tool"
+        },
+        {
+          "type": "SYMBOL",
+          "name": "select"
         }
       ]
     },
@@ -388,9 +392,6 @@
       ]
     },
     "operator": {
-      "type": "PREC",
-      "value": 2,
-      "content": {
       "type": "CHOICE",
       "members": [
         {
@@ -466,7 +467,6 @@
           "value": "where"
         }
       ]
-      }
     },
     "operation": {
       "type": "PREC_RIGHT",
@@ -489,6 +489,52 @@
         ]
       }
     },
+    "select": {
+      "type": "PREC_RIGHT",
+      "value": 0,
+      "content": {
+        "type": "SEQ",
+        "members": [
+          {
+            "type": "STRING",
+            "value": "select"
+          },
+          {
+            "type": "SYMBOL",
+            "name": "identifier"
+          },
+          {
+            "type": "STRING",
+            "value": "from"
+          },
+          {
+            "type": "SYMBOL",
+            "name": "identifier"
+          },
+          {
+            "type": "CHOICE",
+            "members": [
+              {
+                "type": "SEQ",
+                "members": [
+                  {
+                    "type": "STRING",
+                    "value": "where"
+                  },
+                  {
+                    "type": "SYMBOL",
+                    "name": "expression"
+                  }
+                ]
+              },
+              {
+                "type": "BLANK"
+              }
+            ]
+          }
+        ]
+      }
+    },
     "control_flow": {
       "type": "PREC_RIGHT",
       "value": 0,

src/node-types.json

@@ -48,6 +48,10 @@
           "type": "operation",
           "named": true
         },
+        {
+          "type": "select",
+          "named": true
+        },
         {
           "type": "tool",
           "named": true
@@ -185,6 +189,25 @@
       ]
     }
   },
+  {
+    "type": "select",
+    "named": true,
+    "fields": {},
+    "children": {
+      "multiple": true,
+      "required": true,
+      "types": [
+        {
+          "type": "expression",
+          "named": true
+        },
+        {
+          "type": "identifier",
+          "named": true
+        }
+      ]
+    }
+  },
   {
     "type": "statement",
     "named": true,