From 9bcd85acf3013cdadadc7d6e6a60795926723c56 Mon Sep 17 00:00:00 2001
From: Sven SAULEAU <sven.sauleau@xtuc.fr>
Date: Tue, 30 May 2017 20:12:43 +0200
Subject: [PATCH] feat: CallExpression support

---
 ast/spec.md                                   |   1 +
 src/parser/expression.js                      |  10 ++
 .../optional-chaining/function-call/actual.js |   2 +
 .../function-call/expected.json               | 133 ++++++++++++++++++
 4 files changed, 146 insertions(+)
 create mode 100644 test/fixtures/experimental/optional-chaining/function-call/expected.json

diff --git a/ast/spec.md b/ast/spec.md
index 1dd5be0282..ce24b1e5df 100644
--- a/ast/spec.md
+++ b/ast/spec.md
@@ -897,6 +897,7 @@ interface CallExpression <: Expression {
   type: "CallExpression";
   callee: Expression | Super | Import;
   arguments: [ Expression | SpreadElement ];
+  optional: boolean | null;
 }
 ```
 
diff --git a/src/parser/expression.js b/src/parser/expression.js
index 0ab2c501cd..30e459c3a0 100644
--- a/src/parser/expression.js
+++ b/src/parser/expression.js
@@ -316,6 +316,16 @@ export default class ExpressionParser extends LValParser {
           node.computed = true;
           this.expect(tt.bracketR);
           base = this.finishNode(node, "MemberExpression");
+        } if (this.eat(tt.parenL)) {
+          const possibleAsync = this.state.potentialArrowAt === base.start &&
+            base.type === "Identifier" &&
+            base.name === "async" &&
+            !this.canInsertSemicolon();
+
+          node.arguments = this.parseCallExpressionArguments(tt.parenR, possibleAsync);
+          node.optional = true;
+
+          base = this.finishNode(node, "CallExpression");
         } else {
           node.object = base;
           node.property = this.parseIdentifier(true);
diff --git a/test/fixtures/experimental/optional-chaining/function-call/actual.js b/test/fixtures/experimental/optional-chaining/function-call/actual.js
index 4488735365..7a5a8c001b 100644
--- a/test/fixtures/experimental/optional-chaining/function-call/actual.js
+++ b/test/fixtures/experimental/optional-chaining/function-call/actual.js
@@ -1 +1,3 @@
 func?.()
+
+func?.(a, b)
diff --git a/test/fixtures/experimental/optional-chaining/function-call/expected.json b/test/fixtures/experimental/optional-chaining/function-call/expected.json
new file mode 100644
index 0000000000..60248b0e79
--- /dev/null
+++ b/test/fixtures/experimental/optional-chaining/function-call/expected.json
@@ -0,0 +1,133 @@
+{
+  "type": "File",
+  "start": 0,
+  "end": 22,
+  "loc": {
+    "start": {
+      "line": 1,
+      "column": 0
+    },
+    "end": {
+      "line": 3,
+      "column": 12
+    }
+  },
+  "program": {
+    "type": "Program",
+    "start": 0,
+    "end": 22,
+    "loc": {
+      "start": {
+        "line": 1,
+        "column": 0
+      },
+      "end": {
+        "line": 3,
+        "column": 12
+      }
+    },
+    "sourceType": "script",
+    "body": [
+      {
+        "type": "ExpressionStatement",
+        "start": 0,
+        "end": 8,
+        "loc": {
+          "start": {
+            "line": 1,
+            "column": 0
+          },
+          "end": {
+            "line": 1,
+            "column": 8
+          }
+        },
+        "expression": {
+          "type": "CallExpression",
+          "start": 0,
+          "end": 8,
+          "loc": {
+            "start": {
+              "line": 1,
+              "column": 0
+            },
+            "end": {
+              "line": 1,
+              "column": 8
+            }
+          },
+          "arguments": [],
+          "optional": true
+        }
+      },
+      {
+        "type": "ExpressionStatement",
+        "start": 10,
+        "end": 22,
+        "loc": {
+          "start": {
+            "line": 3,
+            "column": 0
+          },
+          "end": {
+            "line": 3,
+            "column": 12
+          }
+        },
+        "expression": {
+          "type": "CallExpression",
+          "start": 10,
+          "end": 22,
+          "loc": {
+            "start": {
+              "line": 3,
+              "column": 0
+            },
+            "end": {
+              "line": 3,
+              "column": 12
+            }
+          },
+          "arguments": [
+            {
+              "type": "Identifier",
+              "start": 17,
+              "end": 18,
+              "loc": {
+                "start": {
+                  "line": 3,
+                  "column": 7
+                },
+                "end": {
+                  "line": 3,
+                  "column": 8
+                },
+                "identifierName": "a"
+              },
+              "name": "a"
+            },
+            {
+              "type": "Identifier",
+              "start": 20,
+              "end": 21,
+              "loc": {
+                "start": {
+                  "line": 3,
+                  "column": 10
+                },
+                "end": {
+                  "line": 3,
+                  "column": 11
+                },
+                "identifierName": "b"
+              },
+              "name": "b"
+            }
+          ],
+          "optional": true
+        }
+      }
+    ],
+    "directives": []
+  }
+}
\ No newline at end of file