added missing type fields in typings and tests for them

types/index.d.ts

@@ -270,6 +270,7 @@ declare namespace hbs {
       interface Statement extends Node {}
 
       interface MustacheStatement extends Statement {
+          type: 'MustacheStatement';
           path: PathExpression | Literal;
           params: Expression[];
           hash: Hash;
@@ -280,6 +281,7 @@ declare namespace hbs {
       interface Decorator extends MustacheStatement { }
 
       interface BlockStatement extends Statement {
+          type: 'BlockStatement';
           path: PathExpression;
           params: Expression[];
           hash: Hash;
@@ -293,6 +295,7 @@ declare namespace hbs {
       interface DecoratorBlock extends BlockStatement { }
 
       interface PartialStatement extends Statement {
+          type: 'PartialStatement';
           name: PathExpression | SubExpression;
           params: Expression[];
           hash: Hash;
@@ -301,6 +304,7 @@ declare namespace hbs {
       }
 
       interface PartialBlockStatement extends Statement {
+          type: 'PartialBlockStatement';
           name: PathExpression | SubExpression;
           params: Expression[];
           hash: Hash;
@@ -310,11 +314,13 @@ declare namespace hbs {
       }
 
       interface ContentStatement extends Statement {
+          type: 'ContentStatement';
           value: string;
           original: StripFlags;
       }
 
       interface CommentStatement extends Statement {
+          type: 'CommentStatement';
           value: string;
           strip: StripFlags;
       }
@@ -322,12 +328,14 @@ declare namespace hbs {
       interface Expression extends Node {}
 
       interface SubExpression extends Expression {
+          type: 'SubExpression';
           path: PathExpression;
           params: Expression[];
           hash: Hash;
       }
 
       interface PathExpression extends Expression {
+          type: 'PathExpression';
           data: boolean;
           depth: number;
           parts: string[];
@@ -336,29 +344,38 @@ declare namespace hbs {
 
       interface Literal extends Expression {}
       interface StringLiteral extends Literal {
+          type: 'StringLiteral';
           value: string;
           original: string;
       }
 
       interface BooleanLiteral extends Literal {
+          type: 'BooleanLiteral';
           value: boolean;
           original: boolean;
       }
 
       interface NumberLiteral extends Literal {
+          type: 'NumberLiteral';
           value: number;
           original: number;
       }
 
-      interface UndefinedLiteral extends Literal {}
+      interface UndefinedLiteral extends Literal {
+          type: 'UndefinedLiteral';
+	  }
 
-      interface NullLiteral extends Literal {}
+      interface NullLiteral extends Literal {
+          type: 'NullLiteral';
+	  }
 
       interface Hash extends Node {
+          type: 'Hash';
           pairs: HashPair[];
       }
 
       interface HashPair extends Node {
+          type: 'HashPair';
           key: string;
           value: Expression;
       }

types/test.ts

@@ -111,3 +111,85 @@ Handlebars.compile('test', {
 Handlebars.compile('test')({},{allowCallsToHelperMissing: true});
 
 Handlebars.compile('test')({},{});
+
+
+const allthings = {} as hbs.AST.MustacheStatement |
+  hbs.AST.BlockStatement |
+  hbs.AST.PartialStatement |
+  hbs.AST.PartialBlockStatement |
+  hbs.AST.ContentStatement |
+  hbs.AST.CommentStatement |
+  hbs.AST.SubExpression |
+  hbs.AST.PathExpression |
+  hbs.AST.StringLiteral |
+  hbs.AST.BooleanLiteral |
+  hbs.AST.NumberLiteral |
+  hbs.AST.UndefinedLiteral |
+  hbs.AST.NullLiteral |
+  hbs.AST.Hash |
+  hbs.AST.HashPair;
+
+switch(allthings.type) {
+  case "MustacheStatement":
+    let mustacheStatement: hbs.AST.MustacheStatement;
+    mustacheStatement = allthings;
+    break;
+  case "BlockStatement":
+    let blockStatement: hbs.AST.BlockStatement;
+    blockStatement = allthings;
+    break;
+  case "PartialStatement":
+    let partialStatement: hbs.AST.PartialStatement;
+    partialStatement = allthings;
+    break;
+  case "PartialBlockStatement":
+    let partialBlockStatement: hbs.AST.PartialBlockStatement;
+    partialBlockStatement = allthings;
+    break;
+  case "ContentStatement":
+    let ContentStatement: hbs.AST.ContentStatement;
+    ContentStatement = allthings;
+    break;
+  case "CommentStatement":
+    let CommentStatement: hbs.AST.CommentStatement;
+    CommentStatement = allthings;
+    break;
+  case "SubExpression":
+    let SubExpression: hbs.AST.SubExpression;
+    SubExpression = allthings;
+    break;
+  case "PathExpression":
+    let PathExpression: hbs.AST.PathExpression;
+    PathExpression = allthings;
+    break;
+  case "StringLiteral":
+    let StringLiteral: hbs.AST.StringLiteral;
+    StringLiteral = allthings;
+    break;
+  case "BooleanLiteral":
+    let BooleanLiteral: hbs.AST.BooleanLiteral;
+    BooleanLiteral = allthings;
+    break;
+  case "NumberLiteral":
+    let NumberLiteral: hbs.AST.NumberLiteral;
+    NumberLiteral = allthings;
+    break;
+  case "UndefinedLiteral":
+    let UndefinedLiteral: hbs.AST.UndefinedLiteral;
+    UndefinedLiteral = allthings;
+    break;
+  case "NullLiteral":
+    let NullLiteral: hbs.AST.NullLiteral;
+    NullLiteral = allthings;
+    break;
+  case "Hash":
+    let Hash: hbs.AST.Hash;
+    Hash = allthings;
+    break;
+  case "HashPair":
+    let HashPair: hbs.AST.HashPair;
+    HashPair = allthings;
+    break;
+  default:
+    break;
+}