1 files changed, 51 insertions, 2 deletions
diff --git a/node_modules/tslint/lib/verify/parse.js b/node_modules/tslint/lib/verify/parse.js
index 1d475efd3..528f68cc8 100644
--- a/node_modules/tslint/lib/verify/parse.js
+++ b/node_modules/tslint/lib/verify/parse.js
@@ -15,6 +15,7 @@
  * limitations under the License.
  */
 Object.defineProperty(exports, "__esModule", { value: true });
+var semver = require("semver");
 var ts = require("typescript");
 var util_1 = require("util");
 var utils_1 = require("../utils");
@@ -30,6 +31,54 @@ function getTypescriptVersionRequirement(text) {
     return undefined;
 }
 exports.getTypescriptVersionRequirement = getTypescriptVersionRequirement;
+function getNormalizedTypescriptVersion() {
+    var tsVersion = new semver.SemVer(ts.version);
+    // remove prerelease suffix when matching to allow testing with nightly builds
+    return tsVersion.major + "." + tsVersion.minor + "." + tsVersion.patch;
+}
+exports.getNormalizedTypescriptVersion = getNormalizedTypescriptVersion;
+function preprocessDirectives(text) {
+    if (!/^#(?:if|else|endif)\b/m.test(text)) {
+        return text; // If there are no directives, just return the input unchanged
+    }
+    var tsVersion = getNormalizedTypescriptVersion();
+    var lines = text.split(/\n/);
+    var result = [];
+    var collecting = true;
+    var state = 0 /* Initial */;
+    for (var _i = 0, lines_2 = lines; _i < lines_2.length; _i++) {
+        var line = lines_2[_i];
+        if (line.startsWith("#if typescript")) {
+            if (state !== 0 /* Initial */) {
+                throw lintError_1.lintSyntaxError("#if directives cannot be nested");
+            }
+            state = 1 /* If */;
+            collecting = semver.satisfies(tsVersion, line.slice("#if typescript".length).trim());
+        }
+        else if (/^#else\s*$/.test(line)) {
+            if (state !== 1 /* If */) {
+                throw lintError_1.lintSyntaxError("unexpected #else");
+            }
+            state = 2 /* Else */;
+            collecting = !collecting;
+        }
+        else if (/^#endif\s*$/.test(line)) {
+            if (state === 0 /* Initial */) {
+                throw lintError_1.lintSyntaxError("unexpected #endif");
+            }
+            state = 0 /* Initial */;
+            collecting = true;
+        }
+        else if (collecting) {
+            result.push(line);
+        }
+    }
+    if (state !== 0 /* Initial */) {
+        throw lintError_1.lintSyntaxError("expected #endif");
+    }
+    return result.join("\n");
+}
+exports.preprocessDirectives = preprocessDirectives;
 /**
  * Takes the full text of a .lint file and returns the contents of the file
  * with all error markup removed
@@ -193,8 +242,8 @@ exports.createMarkupFromErrors = createMarkupFromErrors;
 /* tslint:enable:object-literal-sort-keys */
 function createCodeLineNoToErrorsMap(lines) {
     var errorLinesForCodeLine = [];
-    for (var _i = 0, lines_2 = lines; _i < lines_2.length; _i++) {
-        var line = lines_2[_i];
+    for (var _i = 0, lines_3 = lines; _i < lines_3.length; _i++) {
+        var line = lines_3[_i];
         if (line instanceof lines_1.CodeLine) {
             errorLinesForCodeLine.push([]);
         }