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test_val_assignment.cpp

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#include <emscripten/val.h>

using emscripten::val;

int main() {

val obj = val::object();

// Code like below doesn't work like the user might expect.

// `obj[...] = ...` only modifies the on-stack `val` binding, whereas user probably wanted to set the property on the actual JS object.

// The correct way to set the property is via `val::set()` instead, like `obj.set("foo", 42)`.

// Test here that we help catch this mistake and produce a compilation error for the line below.

obj["foo"] = val(42);

}