From 2a993e0754c6c8541b88f50adc7c9acbd0569556 Mon Sep 17 00:00:00 2001
From: Anix <anik220798@gmail.com>
Date: Fri, 4 Dec 2020 14:45:09 +0000
Subject: [PATCH] Fix: sycing range and loc with start/end (fixes #349)

---
 lib/espree.js      |  8 +++++
 tests/lib/parse.js | 76 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 84 insertions(+)

diff --git a/lib/espree.js b/lib/espree.js
index 50ca6e42..b68ce486 100644
--- a/lib/espree.js
+++ b/lib/espree.js
@@ -162,10 +162,14 @@ module.exports = () => Parser => {
             if (program.range) {
                 program.range[0] = program.body.length ? program.body[0].range[0] : program.range[0];
                 program.range[1] = extra.lastToken ? extra.lastToken.range[1] : program.range[1];
+                program.start = program.range[0];
+                program.end = program.range[1];
             }
             if (program.loc) {
                 program.loc.start = program.body.length ? program.body[0].loc.start : program.loc.start;
                 program.loc.end = extra.lastToken ? extra.lastToken.loc.end : program.loc.end;
+                program.start = program.loc.start.column;
+                program.end = program.loc.end.column;
             }
 
             return program;
@@ -268,11 +272,15 @@ module.exports = () => Parser => {
                 if (result.range) {
                     result.range[0]--;
                     result.range[1] += (terminalDollarBraceL ? 2 : 1);
+                    result.start = result.range[0];
+                    result.end = result.range[1];
                 }
 
                 if (result.loc) {
                     result.loc.start.column--;
                     result.loc.end.column += (terminalDollarBraceL ? 2 : 1);
+                    result.start = result.loc.start.column;
+                    result.end = result.loc.end.column;
                 }
             }
 
diff --git a/tests/lib/parse.js b/tests/lib/parse.js
index b901c485..8161dede 100644
--- a/tests/lib/parse.js
+++ b/tests/lib/parse.js
@@ -78,6 +78,82 @@ describe("parse()", () => {
             assert.deepStrictEqual(tester.getRaw(ast), require("../fixtures/parse/all-pieces.json"));
         });
 
+        it("should output the same value for program.start, end and range when there is a leading/trailing comments", () => {
+            const ast = espree.parse("/* foo */ bar /* baz */", {
+                range: true
+            });
+
+            assert.strictEqual(ast.start, ast.range[0]);
+            assert.strictEqual(ast.end, ast.range[1]);
+        });
+
+        it("should output the same value for program.start, end and range and loc when there is a leading comments with range and loc true", () => {
+            const ast = espree.parse("/* foo */ bar", {
+                range: true,
+                loc: true
+            });
+
+            assert.strictEqual(ast.start, ast.range[0]);
+            assert.strictEqual(ast.end, ast.range[1]);
+            assert.strictEqual(ast.start, ast.loc.start.column);
+            assert.strictEqual(ast.end, ast.loc.end.column);
+        });
+
+        it("should output the same value for program.start, end and loc when there is a leading comments with loc", () => {
+            const ast = espree.parse("/* foo */ bar", {
+                loc: true
+            });
+
+            assert.strictEqual(ast.start, ast.loc.start.column);
+            assert.strictEqual(ast.end, ast.loc.end.column);
+        });
+
+        it("should output the same value for program.start, end and range when there is a trailing comments", () => {
+            const ast = espree.parse(" bar /* foo */", {
+                range: true
+            });
+
+            assert.strictEqual(ast.start, ast.range[0]);
+            assert.strictEqual(ast.end, ast.range[1]);
+        });
+
+        it("should output the same value for range and start and end in templateElement with range", () => {
+            const ast = espree.parse("`foo ${bar}`;", {
+                ecmaVersion: 6,
+                range: true
+            });
+
+            assert.strictEqual(ast.body[0].expression.quasis[0].start, ast.body[0].expression.quasis[0].range[0]);
+            assert.strictEqual(ast.body[0].expression.quasis[0].end, ast.body[0].expression.quasis[0].range[1]);
+            assert.strictEqual(ast.body[0].expression.quasis[1].start, ast.body[0].expression.quasis[1].range[0]);
+            assert.strictEqual(ast.body[0].expression.quasis[1].end, ast.body[0].expression.quasis[1].range[1]);
+        });
+
+        it("should output the same value for loc and start and end in templateElement with loc", () => {
+            const ast = espree.parse("`foo ${bar}`;", {
+                ecmaVersion: 6,
+                loc: true
+            });
+
+            assert.strictEqual(ast.body[0].expression.quasis[0].start, ast.body[0].expression.quasis[0].loc.start.column);
+            assert.strictEqual(ast.body[0].expression.quasis[0].end, ast.body[0].expression.quasis[0].loc.end.column);
+            assert.strictEqual(ast.body[0].expression.quasis[1].start, ast.body[0].expression.quasis[1].loc.start.column);
+            assert.strictEqual(ast.body[0].expression.quasis[1].end, ast.body[0].expression.quasis[1].loc.end.column);
+        });
+
+        it("should output the same value for loc, range and start and end in templateElement with loc and range", () => {
+            const ast = espree.parse("`foo ${bar}`;", {
+                ecmaVersion: 6,
+                loc: true,
+                range: true
+            });
+
+            assert.strictEqual(ast.body[0].expression.quasis[0].start, ast.body[0].expression.quasis[0].loc.start.column);
+            assert.strictEqual(ast.body[0].expression.quasis[0].end, ast.body[0].expression.quasis[0].loc.end.column);
+            assert.strictEqual(ast.body[0].expression.quasis[1].start, ast.body[0].expression.quasis[1].range[0]);
+            assert.strictEqual(ast.body[0].expression.quasis[1].end, ast.body[0].expression.quasis[1].range[1]);
+        });
+
         it("should reset lastToken on each parse", () => {
             espree.parse("var foo = bar;");
             const ast = espree.parse("//foo", {