Merge pull request #41 from prettier/add-option-for-let

Add `@let` syntax support interface

Author: sosukesuzuki

packages/angular-html-parser/README.md

@@ -73,6 +73,10 @@ interface Options {
    * tokenize angular control flow block syntax
    */
   tokenizeAngularBlocks?: boolean,
+  /**
+   * tokenize angular let declaration syntax
+   */
+  tokenizeAngularLetDeclaration?: boolean,
 }
 ```
 

packages/angular-html-parser/src/index.ts

@@ -45,6 +45,10 @@ export interface ParseOptions {
    * tokenize angular control flow block syntax
    */
   tokenizeAngularBlocks?: boolean,
+  /**
+   * tokenize angular let declaration syntax
+   */
+  tokenizeAngularLetDeclaration?: boolean,
 }
 
 export function parse(
@@ -57,6 +61,7 @@ export function parse(
     isTagNameCaseSensitive = false,
     getTagContentType,
     tokenizeAngularBlocks = false,
+    tokenizeAngularLetDeclaration = false,
   } = options;
   return getParser().parse(
     input,
@@ -67,6 +72,7 @@ export function parse(
       canSelfClose,
       allowHtmComponentClosingTags,
       tokenizeBlocks: tokenizeAngularBlocks,
+      tokenizeLet: tokenizeAngularLetDeclaration,
     },
     isTagNameCaseSensitive,
     getTagContentType,

packages/compiler/src/ml_parser/ast.ts

@@ -208,6 +208,10 @@ export class LetDeclaration implements BaseNode {
   visit(visitor: Visitor, context: any): any {
     return visitor.visitLetDeclaration(this, context);
   }
+
+  readonly type = 'letDeclaration';
+  readonly startSourceSpan: null = null;
+  readonly endSourceSpan: null = null;
 }
 
 export interface Visitor {