Add error messages to unreachable ends of switch statements

guanxiongwxh · Apr 25, 2024 · 80d7564 · 80d7564
1 parent ccbd9f6
commit 80d7564
Show file tree

Hide file tree

Showing 3 changed files with 12 additions and 0 deletions.
diff --git a/src/c99-flex.skl b/src/c99-flex.skl
@@ -1220,6 +1220,8 @@ int yyinput (yyscan_t yyscanner)
 			case EOB_ACT_CONTINUE_SCAN:
 				yyscanner->yy_c_buf_p = yyscanner->yytext_ptr + offset;
 				break;
+			default:
+				yypanic("unexpected return value from yy_get_next_buffer()", yyscanner);
 			}
 		}
 	}
@@ -2371,6 +2373,8 @@ m4_ifdef([[M4_MODE_FIND_ACTION_REJECT_OR_INTERACTIVE]], [[
 						yy_cp = yyscanner->yy_c_buf_p;
 						yy_bp = yyscanner->yytext_ptr + YY_MORE_ADJ;
 						goto yy_find_action;
+					default:
+						yypanic("unexpected return value from yy_get_next_buffer()", yyscanner);
 					} /* end EOB inner switch */
 				} /* end if */
 				break;

diff --git a/src/cpp-flex.skl b/src/cpp-flex.skl
@@ -2271,6 +2271,8 @@ m4_ifdef([[M4_MODE_FIND_ACTION_REJECT_OR_INTERACTIVE]], [[
 						yy_cp = YY_G(yy_c_buf_p);
 						yy_bp = YY_G(yytext_ptr) + YY_MORE_ADJ;
 						goto yy_find_action;
+					default:
+						YY_FATAL_ERROR("unexpected return value from yy_get_next_buffer()");
 					} /* end EOB inner switch */
 				} /* end if */
 				break;
@@ -2795,6 +2797,8 @@ int yyFlexLexer::yyinput()
 			case EOB_ACT_CONTINUE_SCAN:
 				YY_G(yy_c_buf_p) = YY_G(yytext_ptr) + offset;
 				break;
+			default:
+				YY_FATAL_ERROR("unexpected return value from yy_get_next_buffer()");
 			}
 		}
 	}

diff --git a/src/go-flex.skl b/src/go-flex.skl
@@ -1127,6 +1127,8 @@ int yyinput(FlexLexer *yyscanner)
 			case EOB_ACT_CONTINUE_SCAN:
 				yyscanner->yyCBufP = yyscanner->yytext_ptr + offset;
 				break;
+			default:
+				yypanic("unexpected return value from yy_get_next_buffer()", yyscanner);
 			}
 		}
 	}
@@ -2217,6 +2219,8 @@ m4_ifdef([[M4_MODE_FIND_ACTION_REJECT_OR_INTERACTIVE]], [[
 						yyCp = yyscanner->yyCBufP;
 						yyBp = yyscanner->yytext_ptr + YY_MORE_ADJ;
 						goto yyFindActionLabel;
+					default:
+						yypanic("unexpected return value from yy_get_next_buffer()", yyscanner);
 					} /* end EOB inner switch */
 				} /* end if */
 				break;