Merge branch 'main' into language-minimum-target

microsoft · jakebailey · Apr 25, 2024 · Apr 24, 2024 · Apr 25, 2024 · Apr 25, 2024
commit 291ad427364d4faf22a5a2caec376e4686da0ea3
diff --git a/src/compiler/scanner.ts b/src/compiler/scanner.ts
@@ -2449,21 +2449,23 @@ export function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean
                 if (!isIdentifierPart(ch, languageVersion)) {
                     break;
                 }
-                const flag = characterToRegularExpressionFlag(String.fromCharCode(ch));
-                if (flag === undefined) {
-                    error(Diagnostics.Unknown_regular_expression_flag, p, 1);
-                }
-                else if (regExpFlags & flag) {
-                    error(Diagnostics.Duplicate_regular_expression_flag, p, 1);
-                }
-                else if (((regExpFlags | flag) & RegularExpressionFlags.UnicodeMode) === RegularExpressionFlags.UnicodeMode) {
-                    error(Diagnostics.The_Unicode_u_flag_and_the_Unicode_Sets_v_flag_cannot_be_set_simultaneously, p, 1);
-                }
-                else {
-                    regExpFlags |= flag;
-                    const availableFrom = regExpFlagToFirstAvailableLanguageVersion.get(flag)! as unknown as ScriptTarget;
-                    if (languageVersion < availableFrom) {
-                        error(Diagnostics.This_regular_expression_flag_is_only_available_when_targeting_0_or_later, p, 1, getNameOfScriptTarget(availableFrom));
+                if (reportErrors) {
+                    const flag = characterToRegularExpressionFlag(String.fromCharCode(ch));
+                    if (flag === undefined) {
+                        error(Diagnostics.Unknown_regular_expression_flag, p, 1);
+                    }
+                    else if (regExpFlags & flag) {
+                        error(Diagnostics.Duplicate_regular_expression_flag, p, 1);
+                    }
+                    else if (((regExpFlags | flag) & RegularExpressionFlags.UnicodeMode) === RegularExpressionFlags.UnicodeMode) {
+                        error(Diagnostics.The_Unicode_u_flag_and_the_Unicode_Sets_v_flag_cannot_be_set_simultaneously, p, 1);
+                    }
+                    else {
+                        regExpFlags |= flag;
+                        const availableFrom = regExpFlagToFirstAvailableLanguageVersion.get(flag)! as unknown as ScriptTarget;
+                        if (languageVersion < availableFrom) {
+                            error(Diagnostics.This_regular_expression_flag_is_only_available_when_targeting_0_or_later, p, 1, getNameOfScriptTarget(availableFrom));
+                        }
                     }
                 }
                 p++;