Create list function

src/env.js

@@ -20,6 +20,11 @@ module.exports = class Env {
         '<': (a, b) => new AST.Boolean({ value: a.value < b.value }),
         '>=': (a, b) => new AST.Boolean({ value: a.value >= b.value }),
         '<=': (a, b) => new AST.Boolean({ value: a.value <= b.value }),
+        'list': function () {
+          return new AST.List({
+            elements: Object.keys(arguments).map(arg => arguments[arg])
+          })
+        }
       }
     }
   }

test/coreTest.js

@@ -0,0 +1,18 @@
+const test = require('tape')
+const helpers = require('./helpers')
+
+const AST = require('../src/ast')
+const OsloError = require('../src/osloError')
+
+test('list function', t => {
+  t.plan(1)
+
+  const tree = helpers.evaluate('(list 1 2 3)')
+  t.deepEqual(tree[0], new AST.List({
+    elements: [
+      new AST.Number({ value: 1 }),
+      new AST.Number({ value: 2 }),
+      new AST.Number({ value: 3 }),
+    ]
+  }))
+})