swc/crates/swc_ecma_parser/tests/tsc/constEnumPropertyAccess2.ts

// @declaration: true

// constant enum declarations are completely erased in the emitted JavaScript code.
// it is an error to reference a constant enum object in any other context
// than a property access that selects one of the enum's members

const enum G {
    A = 1,
    B = 2,
    C = A + B,
    D = A * 2
}

// Error from referring constant enum in any other context than a property access
var z = G;
var z1 = G[G.A];
var g: G;
g = "string";
function foo(x: G) { }
G.B = 3;