acorn-es7-plugin - npm Package Compare versions

Comparing version 1.0.4 to 1.0.5

acorn-es7-plugin.js

 var NotAsync = {} ;
 var asyncExit = /^async[\t ]+(return|throw)/ ;
 var asyncFunction = /^async[\t ]+function/ ;
+var atomOrPropertyOrLabel = /^\s*[:;]/ ;
 
@@ -124,2 +125,7 @@ /* Create a new parser derived from the specified parser, so that in the
 						// could not be an identifier with the name 'await'.
+
+						// Look-ahead to see if this is really a property or label called async or await
+						if (this.input.slice(r.end).match(atomOrPropertyOrLabel))
+							return r ; // This is a valid property name or label
+
 						if (typeof options==="object" && options.awaitAnywhere) {
@@ -149,10 +155,13 @@ var start = this.start ;
 			if (key.type === "Identifier" && key.name === "async") {
-				es7check(prop) ;
-				prop.async = true ;
-				key = base.apply(this,arguments) ;
-				if (key.type==='Identifier') {
-					if (key.name==='constructor')
-						this.raise(key.start,"'constructor()' cannot be be async") ;
-					else if (key.name==='set')
-						this.raise(key.start,"'set <member>(value)' cannot be be async") ;
+				// Look-ahead to see if this is really a property or label called async or await
+				if (!this.input.slice(key.end).match(atomOrPropertyOrLabel)){
+					es7check(prop) ;
+					prop.async = true ;
+					key = base.apply(this,arguments) ;
+					if (key.type==='Identifier') {
+						if (key.name==='constructor')
+							this.raise(key.start,"'constructor()' cannot be be async") ;
+						else if (key.name==='set')
+							this.raise(key.start,"'set <member>(value)' cannot be be async") ;
+					}
 				}
@@ -159,0 +168,0 @@ }

package.json

 {
   "name": "acorn-es7-plugin",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "description": "A plugin for the Acorn parser that understands the ES7 keywords async and await",
@@ -5,0 +5,0 @@ "main": "acorn-es7-plugin.js",

README.md

@@ -22,9 +22,7 @@ [![NPM](https://nodei.co/npm/acorn-es7-plugin.png?downloads=true&downloadRank=true)](https://nodei.co/npm/acorn-es7-plugin/)
 
-	var code = "async function x(){ return ; }\n";
-	code += "await x(1);" ;
-	
+	var code = "async function x(){ if (x) return await(x-1) ; return 0 ; }\n";	
 	var ast = acorn.parse(code,{
-	// Specify use of the plugin
+		// Specify use of the plugin
 		plugins:{asyncawait:true},
-	// Specify the ecmaVersion
+		// Specify the ecmaVersion
 		ecmaVersion:7
@@ -35,2 +33,63 @@ }) ;
 	
+Output:
+
+	{
+		"type": "Program",
+		"body": [
+		{
+		  "type": "FunctionDeclaration",
+		  "id": {
+		    "type": "Identifier",
+		    "name": "x"
+		  },
+		  "generator": false,
+		  "expression": false,
+		  "params": [],
+		  "body": {
+		    "type": "BlockStatement",
+		    "body": [
+		      {
+		        "type": "IfStatement",
+		        "test": {
+		          "type": "Identifier",
+		          "name": "x"
+		        },
+		        "consequent": {
+		          "type": "ReturnStatement",
+		          "argument": {
+		            "type": "AwaitExpression",
+		            "operator": "await",
+		            "argument": {
+		              "type": "BinaryExpression",
+		              "left": {
+		                "type": "Identifier",
+		                "name": "x"
+		              },
+		              "operator": "-",
+		              "right": {
+		                "type": "Literal",
+		                "value": 1,
+		                "raw": "1"
+		              }
+		            }
+		          }
+		        },
+		        "alternate": null
+		      },
+		      {
+		        "type": "ReturnStatement",
+		        "argument": {
+		          "type": "Literal",
+		          "value": 0,
+		          "raw": "0"
+		        }
+		      }
+		    ]
+		  },
+		  "async": true
+		}
+		],
+		"sourceType": "script"
+	}
+	
 Options & Compliance
@@ -45,2 +104,2 @@ ====================
 | awaitAnywhere | If `await` is used outside of an async function and could not be an identifier, generate an AwaitExpression node. This typically means you can use `await` anywhere _except_ when its argument would require parentheses, as this parses to a call to 'await(....)'. |
-| asyncExits | Allow the additional sequences `async return <optional-expression>` and `async throw <optional-expression>`. These sequences are used with [nodent](https://github.com/MatAtBread/nodent). In each case, as with async functions, a standard ReturnStatement (or ThrowStatement) node is generated, with an additional member 'async' set to true.
+| asyncExits | Allow the additional sequences `async return <optional-expression>` and `async throw <expression>`. These sequences are used with [nodent](https://github.com/MatAtBread/nodent). In each case, as with async functions, a standard ReturnStatement (or ThrowStatement) node is generated, with an additional member 'async' set to true.

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Improved metrics

Total package byte prevSize

9456

increased by21.62%

Lines of code

164

increased by4.46%

Number of lines in readme file

103

increased by134.09%

No dependency changes