Function TEST

tests/test_expression_templates.cpp:37–50

// ============================================================================

TEST(ExpressionTemplates, FunctorComposition2Way) {
    // Test 2-way functor composition: g(f(x))
    ops::exp_op f;
    ops::neg_op g;

    auto composed = ops::compose(f, g);

    // Test on CPU
    float x = 2.0f;
    float result = composed(x);
    float expected = -std::exp(x);

    EXPECT_NEAR(result, expected, 1e-5f);
}

TEST(ExpressionTemplates, FunctorComposition3Way) {
    // Test 3-way functor composition: h(g(f(x)))