fix: tuples should not be parsed if multi-value is disabled

Author: JairusSW

src/parser.ts

@@ -9,6 +9,7 @@
 
 import {
   CommonFlags,
+  Feature,
   LIBRARY_PREFIX,
   PATH_DELIMITER
 } from "./common";
@@ -91,6 +92,7 @@ import {
 
   mangleInternalPath
 } from "./ast";
+import { Options } from "./compiler";
 
 /** Represents a dependee. */
 class Dependee {
@@ -119,7 +121,8 @@ export class Parser extends DiagnosticEmitter {
   sources: Source[];
   /** Current overridden module name. */
   currentModuleName: string | null = null;
-
+  /** Temporary variable so I can disable parsing tuples if multi-variable is disabled */
+  readonly options: Options | null = null;
   /** Constructs a new parser. */
   constructor(
     diagnostics: DiagnosticMessage[] | null = null,
@@ -576,7 +579,7 @@ export class Parser extends DiagnosticEmitter {
       }
 
     // '[' Type (',' Type)* ']'
-    } else if (token == Token.OpenBracket) {
+    } else if (this.options && this.options.hasFeature(Feature.MultiValue) && token == Token.OpenBracket) {
       let elements: TypeNode[] = [];
       let elementNames: (IdentifierExpression | null)[] = [];
       let hasElementNames = false;

src/program.ts

@@ -442,6 +442,9 @@ export class Program extends DiagnosticEmitter {
     let nativeFile = new File(this, Source.native);
     this.nativeFile = nativeFile;
     this.filesByName.set(nativeFile.internalName, nativeFile);
+
+    // temporary fix
+    this.parser.options = this.options;
   }
 
   /** Module instance. */

tests/compiler/tuple-disabled.json

@@ -0,0 +1,9 @@
+{
+  "asc_flags": [
+    "--disable", "multi-value"
+  ],
+  "stderr": [
+    "TS1110: Type expected.",
+    "3 parse error(s)"
+  ]
+}

tests/compiler/tuple-disabled.ts

@@ -0,0 +1,3 @@
+export function tupleDisabled(x: [left: i32, right: i32]): void {}
+export type tupleTypeDisabled1 = [i32, i32];
+export type tupleTypeDisabled2 = [];