src/bytecode.ts

@@ -495,6 +495,18 @@ function toBytecodeFromString(str: string): Bytecode /* throws */ {
         bytecode.constants.push(toValue(null))
         operandValue = bytecode.constants.length - 1
 
+      } else if (/^\/.*\/[a-z]*$/.test(operand)) {
+        // regex literal (/pattern/flags)
+        const lastSlash = operand.lastIndexOf('/')
+        const pattern = operand.slice(1, lastSlash)
+        const flags = operand.slice(lastSlash + 1)
+        try {
+          const regex = new RegExp(pattern, flags)
+          bytecode.constants.push(toValue(regex))
+          operandValue = bytecode.constants.length - 1
+        } catch (e) {
+          throw new Error(`Invalid regex literal: ${operand}`)
+        }
       }else {
         // Assume it's a variable name if it doesn't match any other pattern
         // This allows emoji, Unicode, and other creative identifiers

tests/basic.test.ts

@@ -102,6 +102,29 @@ test("EQ - equality comparison", async () => {
   expect(await run(toBytecode(str2))).toEqual({ type: 'boolean', value: false })
 })
 
+test('EQ - equality with regexes', async () => {
+  const str = `
+  PUSH /cool/i
+  PUSH /cool/i
+  EQ
+`
+  expect(await run(toBytecode(str))).toEqual({ type: 'boolean', value: true })
+
+  const str2 = `
+  PUSH /cool/
+  PUSH /cool/i
+  EQ
+`
+  expect(await run(toBytecode(str2))).toEqual({ type: 'boolean', value: false })
+
+  const str3 = `
+  PUSH /not-cool/
+  PUSH /cool/
+  EQ
+`
+  expect(await run(toBytecode(str3))).toEqual({ type: 'boolean', value: false })
+})
+
 test("NEQ - not equal comparison", async () => {
   const str = `
   PUSH 5