fix(compiler-sfc): support method signature in defineProps

fix #2983

packages/compiler-sfc/__tests__/__snapshots__/compileScript.spec.ts.snap

@@ -864,6 +864,7 @@ export default _defineComponent({
     recordRef: { type: Object, required: true },
     interface: { type: Object, required: true },
     alias: { type: Array, required: true },
+    method: { type: Function, required: true },
     union: { type: [String, Number], required: true },
     literalUnion: { type: [String, String], required: true },
     literalUnionMixed: { type: [String, Number, Boolean], required: true },
@@ -887,6 +888,7 @@ export default _defineComponent({
         recordRef: Record<string, null>
         interface: Test
         alias: Alias
+        method(): void
 
         union: string | number
         literalUnion: 'foo' | 'bar'

packages/compiler-sfc/__tests__/compileScript.spec.ts

@@ -532,6 +532,7 @@ const emit = defineEmits(['a', 'b'])
         recordRef: Record<string, null>
         interface: Test
         alias: Alias
+        method(): void
 
         union: string | number
         literalUnion: 'foo' | 'bar'
@@ -557,6 +558,7 @@ const emit = defineEmits(['a', 'b'])
       expect(content).toMatch(`recordRef: { type: Object, required: true }`)
       expect(content).toMatch(`interface: { type: Object, required: true }`)
       expect(content).toMatch(`alias: { type: Array, required: true }`)
+      expect(content).toMatch(`method: { type: Function, required: true }`)
       expect(content).toMatch(
         `union: { type: [String, Number], required: true }`
       )
@@ -585,6 +587,7 @@ const emit = defineEmits(['a', 'b'])
         recordRef: BindingTypes.PROPS,
         interface: BindingTypes.PROPS,
         alias: BindingTypes.PROPS,
+        method: BindingTypes.PROPS,
         union: BindingTypes.PROPS,
         literalUnion: BindingTypes.PROPS,
         literalUnionMixed: BindingTypes.PROPS,

packages/compiler-sfc/src/compileScript.ts

@@ -1355,14 +1355,25 @@ function extractRuntimeProps(
 ) {
   const members = node.type === 'TSTypeLiteral' ? node.members : node.body
   for (const m of members) {
-    if (m.type === 'TSPropertySignature' && m.key.type === 'Identifier') {
+    if (
+      (m.type === 'TSPropertySignature' || m.type === 'TSMethodSignature') &&
+      m.key.type === 'Identifier'
+    ) {
+      let type
+      if (__DEV__) {
+        if (m.type === 'TSMethodSignature') {
+          type = ['Function']
+        } else if (m.typeAnnotation) {
+          type = inferRuntimeType(
+            m.typeAnnotation.typeAnnotation,
+            declaredTypes
+          )
+        }
+      }
       props[m.key.name] = {
         key: m.key.name,
         required: !m.optional,
-        type:
-          __DEV__ && m.typeAnnotation
-            ? inferRuntimeType(m.typeAnnotation.typeAnnotation, declaredTypes)
-            : [`null`]
+        type: type || [`null`]
       }
     }
   }