handle regex with pipes in filter parser

src/compiler/parser/filter-parser.js

@@ -4,6 +4,7 @@ export function parseFilters (exp: string): string {
   let inSingle = false
   let inDouble = false
   let inTemplateString = false
+  let inRegex = false
   let curly = 0
   let square = 0
   let paren = 0
@@ -14,14 +15,13 @@ export function parseFilters (exp: string): string {
     prev = c
     c = exp.charCodeAt(i)
     if (inSingle) {
-      // check single quote
-      if (c === 0x27 && prev !== 0x5C) inSingle = !inSingle
+      if (c === 0x27 && prev !== 0x5C) inSingle = false
     } else if (inDouble) {
-      // check double quote
-      if (c === 0x22 && prev !== 0x5C) inDouble = !inDouble
+      if (c === 0x22 && prev !== 0x5C) inDouble = false
     } else if (inTemplateString) {
-      // check template literal
-      if (c === 0x60 && prev !== 0x5C) inTemplateString = !inTemplateString
+      if (c === 0x60 && prev !== 0x5C) inTemplateString = false
+    } else if (inRegex) {
+      if (c === 0x2f && prev !== 0x5C) inRegex = false
     } else if (
       c === 0x7C && // pipe
       exp.charCodeAt(i + 1) !== 0x7C &&
@@ -40,6 +40,7 @@ export function parseFilters (exp: string): string {
         case 0x22: inDouble = true; break         // "
         case 0x27: inSingle = true; break         // '
         case 0x60: inTemplateString = true; break // `
+        case 0x2f: inRegex = true; break          // /
         case 0x28: paren++; break                 // (
         case 0x29: paren--; break                 // )
         case 0x5B: square++; break                // [

test/unit/features/filter/filter.spec.js

@@ -54,6 +54,21 @@ describe('Filters', () => {
     expect(vm.$refs.bar).toBe(vm.$el)
   })
 
+  it('handle regex with pipe', () => {
+    const vm = new Vue({
+      template: `<test ref="test" :pattern="/a|b\\// | identity"></test>`,
+      filters: { identity: v => v },
+      components: {
+        test: {
+          props: ['pattern'],
+          template: '<div></div>'
+        }
+      }
+    }).$mount()
+    expect(vm.$refs.test.pattern instanceof RegExp).toBe(true)
+    expect(vm.$refs.test.pattern.toString()).toBe('/a|b\\//')
+  })
+
   it('arguments', () => {
     const vm = new Vue({
       template: `<div>{{ msg | add(a, 3) }}</div>`,