add function.sent

README.md

@@ -71,3 +71,4 @@ require("babylon").parse("code", {
  - `exportExtensions`
  - `exponentiationOperator`
  - `asyncGenerators`
+ - `functionSent`

src/parser/expression.js

@@ -28,7 +28,7 @@ const pp = Parser.prototype;
 // strict mode, init properties are also not allowed to be repeated.
 
 pp.checkPropClash = function (prop, propHash) {
-  if (prop.computed || prop.method) return;
+  if (prop.computed) return;
 
   let key = prop.key;
   let name;
@@ -459,9 +459,7 @@ pp.parseExprAtom = function (refShorthandDefaultPos) {
       return this.parseObj(false, refShorthandDefaultPos);
 
     case tt._function:
-      node = this.startNode();
-      this.next();
-      return this.parseFunction(node, false);
+      return this.parseFunctionExpression();
 
     case tt.at:
       this.parseDecorators();
@@ -493,6 +491,27 @@ pp.parseExprAtom = function (refShorthandDefaultPos) {
   }
 };
 
+pp.parseFunctionExpression = function () {
+  let node = this.startNode();
+  let meta = this.parseIdentifier(true);
+  if (this.state.inGenerator && this.eat(tt.dot) && this.hasPlugin("functionSent")) {
+    return this.parseMetaProperty(node, meta, "sent");
+  } else {
+    return this.parseFunction(node, false);
+  }
+};
+
+pp.parseMetaProperty = function (node, meta, propertyName) {
+  node.meta = meta;
+  node.property = this.parseIdentifier(true);
+
+  if (node.property.name !== propertyName) {
+    this.raise(node.property.start, `The only valid meta property for new is ${meta.name}.${propertyName}`);
+  }
+
+  return this.finishNode(node, "MetaProperty");
+};
+
 pp.parseLiteral = function (value, type) {
   let node = this.startNode();
   this.addExtra(node, "rawValue", value);
@@ -592,14 +611,7 @@ pp.parseNew = function () {
   let meta = this.parseIdentifier(true);
 
   if (this.eat(tt.dot)) {
-    node.meta = meta;
-    node.property = this.parseIdentifier(true);
-
-    if (node.property.name !== "target") {
-      this.raise(node.property.start, "The only valid meta property for new is new.target");
-    }
-
-    return this.finishNode(node, "MetaProperty");
+    return this.parseMetaProperty(node, meta, "target");
   }
 
   node.callee = this.parseNoCallExpr();

test/fixtures/experimental/function-sent/inside-function/actual.js

@@ -0,0 +1,3 @@
+function foo() {
+  return function.sent;
+}

test/fixtures/experimental/function-sent/inside-function/options.json

@@ -0,0 +1,3 @@
+{
+  "throws": "Unexpected token (2:17)"
+}

test/fixtures/experimental/function-sent/inside-generator/actual.js

@@ -0,0 +1,3 @@
+function* foo() {
+  return function.sent;
+}

test/fixtures/experimental/function-sent/inside-generator/expected.json

@@ -0,0 +1,148 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 43,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 3,
+      "column": 1
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 43,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 3,
+        "column": 1
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "FunctionDeclaration",
+        "start": 0,
+        "end": 43,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 3,
+            "column": 1
+          }
+        },
+        "id": {
+          "type": "Identifier",
+          "start": 10,
+          "end": 13,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 10
+            },
+            "end": {
+              "line": 1,
+              "column": 13
+            }
+          },
+          "name": "foo"
+        },
+        "generator": true,
+        "expression": false,
+        "params": [],
+        "body": {
+          "type": "BlockStatement",
+          "start": 16,
+          "end": 43,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 16
+            },
+            "end": {
+              "line": 3,
+              "column": 1
+            }
+          },
+          "body": [
+            {
+              "type": "ReturnStatement",
+              "start": 20,
+              "end": 41,
+              "loc": {
+                "start": {
+                  "line": 2,
+                  "column": 2
+                },
+                "end": {
+                  "line": 2,
+                  "column": 23
+                }
+              },
+              "argument": {
+                "type": "MetaProperty",
+                "start": 27,
+                "end": 40,
+                "loc": {
+                  "start": {
+                    "line": 2,
+                    "column": 9
+                  },
+                  "end": {
+                    "line": 2,
+                    "column": 22
+                  }
+                },
+                "meta": {
+                  "type": "Identifier",
+                  "start": 27,
+                  "end": 35,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 9
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 17
+                    }
+                  },
+                  "name": "function"
+                },
+                "property": {
+                  "type": "Identifier",
+                  "start": 36,
+                  "end": 40,
+                  "loc": {
+                    "start": {
+                      "line": 2,
+                      "column": 18
+                    },
+                    "end": {
+                      "line": 2,
+                      "column": 22
+                    }
+                  },
+                  "name": "sent"
+                }
+              }
+            }
+          ],
+          "directives": []
+        }
+      }
+    ],
+    "directives": []
+  }
+}

test/fixtures/experimental/function-sent/options.json

@@ -0,0 +1,3 @@
+{
+  "plugins": ["functionSent"]
+}