In TypeScript 0.8.1.1, a 'declare' is needed in front of the 'class Spinner', since without it the compiler attempts to compile it as an actual class definition, and fails with:
Message: Overload declaration lacks definition
Line number: 27
Column number: 5
Source error:
Line 26: class Spinner {
Line 27: constructor (options?: SpinnerOptions);
-------------^
Line 28: spin(target?: any);
The test in the typescript codebase that confirms this is intentional behavior is in tests/compiler/class.ts
http://typescript.codeplex.com/SourceControl/changeset/view/2bee84410e02#tests/compiler/class.ts
****
describe('Testing function signatures inside classes', function () {
it('Regression test - was previously giving runtime error', function () {
var code = "class A { a(completed: () => any): void; }";
Harness.Compiler.compileString(code, 'fnsig-inside-classes', function (result) {
assert.compilerWarning(result, 1, 10, 'Overload declaration lacks definition');
assert.equal(result.errors.length, 1);
});
});
});
****
The compiler code that implements the check is in src/compiler/signatures.ts
http://typescript.codeplex.com/SourceControl/changeset/view/2bee84410e02#src/compiler/signatures.ts
****
if (!hasConstruct && !this.definitionSignature && this.signatures[i].declAST && this.signatures[i].declAST.isOverload && !hasFlag(this.signatures[i].declAST.fncFlags, FncFlags.Ambient)) {
checker.errorReporter.simpleError(this.signatures[i].declAST, "Overload declaration lacks definition");
}
****
By adding the 'declare', we tell the TypeScript compiler that this is just intending to expose the API of the class, not the actual implementation.
See https://github.com/sockjs/sockjs-client
Created manually by inspecting the various parameters
and return values.
There are seperate events, since, although SockJS
exposes a Websocket-like interface, it's not 100% same.
The Backbone.Router class did not previously extend Events in the
definition file. This caused the TypeScript compiler to raise an
error when calling one of the Events methods (such as on()) on an
instance of a router.
This change allows instances of classes derived from Backbone.Router
to call methods on the Events class that are inherited by the router.
Robert S