==== tests/cases/conformance/externalModules/foo3.ts (0 errors) ====
    import foo2 = require('./foo2');
    var x = foo2(); // should be boolean
==== tests/cases/conformance/externalModules/foo1.ts (1 errors) ====
    export function x(){
    ~~~~~~~~~~~~~~~~~~~~
    	return true;
    ~~~~~~~~~~~~~
    }
    ~
!!! Cannot compile external modules unless the '--module' flag is provided.
    
==== tests/cases/conformance/externalModules/foo2.ts (0 errors) ====
    import foo1 = require('./foo1');
    var x = foo1.x;
    export = x;