}

	case *Map:
		// Two map types are identical if they have identical key and value types.
		if y, ok := y.(*Map); ok {
			return c.identical(x.key, y.key, p) && c.identical(x.elem, y.elem, p)
		}

	case *Chan:
		// Two channel types are identical if they have identical value types
		// and the same direction.
		if y, ok := y.(*Chan); ok {
			return x.dir == y.dir && c.identical(x.elem, y.elem, p)
		}

	case *Named:

		}

	case *Map:
		// Two map types are identical if they have identical key and value types.
		if y, ok := y.(*Map); ok {
			return c.identical(x.key, y.key, p) && c.identical(x.elem, y.elem, p)
		}

	case *Chan:
		// Two channel types are identical if they have identical value types
		// and the same direction.
		if y, ok := y.(*Chan); ok {
			return x.dir == y.dir && c.identical(x.elem, y.elem, p)
		}

	case *Named:

        expect:
        fails("resolveSample")
        failure.assertHasDocumentedCause("Consumable configurations with identical capabilities within a project (other than the default configuration) must have unique attributes, but configuration ':sample1' and [configuration ':sample2'] contain identical attribute sets. " +
            "Consider adding an additional attribute to one of the configurations to disambiguate them.  " +

	case *types.Union:
		return h.hashUnion(t)

	case *types.Interface:
		// Interfaces are identical if they have the same set of methods, with
		// identical names and types, and they have the same set of type
		// restrictions. See go/types.identical for more details.
		var hash uint32 = 9103

		// Hash methods.
		for i, n := 0, t.NumMethods(); i < n; i++ {

{info}> {normal}first failure
   {info}> {normal}ultimate cause
{info}> {normal}There is 1 more failure with an identical cause.

* Try:
$STACKTRACE
$INFO_OR_DEBUG
$SCAN
$GET_HELP
"""
    }

    def "multi-cause exceptions have branches with identical root causes and additional intermediate failures summarized properly"() {
        def ultimateCause = new RuntimeException("ultimate cause")

// previous instances with the same identity. As a special case, generic
// *Signature origin types are only considered identical if they are pointer
// equivalent, so that instantiating distinct (but possibly identical)
// signatures will yield different instances. The use of a shared context does
// not guarantee that identical instances are deduplicated in all cases.
//
// If validate is set, Instantiate verifies that the number of type arguments

        hasScript(":module1", scripts)
        eachScriptIsUnique(scripts)
        getCompileBuildFileOperationsCount() == 4 // classpath + body for settings and for the 2 identical scripts
    }

    @ToBeFixedForConfigurationCache(because = "test expect script evaluation")
    def "identical build files are compiled once for distinct invocations"() {
        given:
        root {
            core {
                'core.gradle'(this.simpleBuild())

// previous instances with the same identity. As a special case, generic
// *Signature origin types are only considered identical if they are pointer
// equivalent, so that instantiating distinct (but possibly identical)
// signatures will yield different instances. The use of a shared context does
// not guarantee that identical instances are deduplicated in all cases.
//
// If validate is set, Instantiate verifies that the number of type arguments

	if x.mode == invalid || !isValid(T) {
		return true, 0 // avoid spurious errors
	}

	origT := T
	V := Unalias(x.typ)
	T = Unalias(T)

	// x's type is identical to T
	if Identical(V, T) {
		return true, 0
	}

	Vu := under(V)
	Tu := under(T)
	Vp, _ := V.(*TypeParam)
	Tp, _ := T.(*TypeParam)

	// x is an untyped value representable by a value of type T.

// type parameter and its core type.
// If two types are not structurally equivalent, they cannot be Go
// identical types. On the other hand, if they are structurally
// equivalent, they may be Go identical or at least assignable, or
// they may be in the type set of a constraint.
// Whether they indeed are identical or assignable is determined
// upon instantiation and function argument passing.

package types

import (