Revert "remove parser pre/post transforms (not used)"

This reverts commit 2e7a792.

src/compiler/parser/index.js

@@ -30,7 +30,9 @@ const decodeHTMLCached = cached(decodeHTML)
 let warn
 let platformGetTagNamespace
 let platformMustUseProp
+let preTransforms
 let transforms
+let postTransforms
 let delimiters
 
 /**
@@ -43,7 +45,9 @@ export function parse (
   warn = options.warn || baseWarn
   platformGetTagNamespace = options.getTagNamespace || no
   platformMustUseProp = options.mustUseProp || no
+  preTransforms = pluckModuleFunction(options.modules, 'preTransformNode')
   transforms = pluckModuleFunction(options.modules, 'transformNode')
+  postTransforms = pluckModuleFunction(options.modules, 'postTransformNode')
   delimiters = options.delimiters
   const stack = []
   const preserveWhitespace = options.preserveWhitespace !== false
@@ -88,6 +92,11 @@ export function parse (
         )
       }
 
+      // apply pre-transforms
+      for (let i = 0; i < preTransforms.length; i++) {
+        preTransforms[i](element, options)
+      }
+
       if (!inPre) {
         processPre(element)
         if (element.pre) {
@@ -151,6 +160,10 @@ export function parse (
         currentParent = element
         stack.push(element)
       }
+      // apply post-transforms
+      for (let i = 0; i < postTransforms.length; i++) {
+        postTransforms[i](element, options)
+      }
     },
 
     end () {

test/unit/modules/compiler/parser.spec.js

@@ -292,4 +292,22 @@ describe('parser', () => {
     const ast = parse('<input type="text" name="field1" :value="msg">', options)
     expect(ast.props).toBeUndefined()
   })
+
+  it('pre/post transforms', () => {
+    const options = extend({}, baseOptions)
+    const spy1 = jasmine.createSpy('preTransform')
+    const spy2 = jasmine.createSpy('postTransform')
+    options.modules = options.modules.concat([{
+      preTransformNode (el) {
+        spy1(el.tag)
+      },
+      postTransformNode (el) {
+        expect(el.staticAttrs.length).toBe(1)
+        spy2(el.tag)
+      }
+    }])
+    parse('<img v-pre src="hi">', options)
+    expect(spy1).toHaveBeenCalledWith('img')
+    expect(spy2).toHaveBeenCalledWith('img')
+  })
 })