other.
If the indices are out of range at run time, a <a href="#Run_time_panics">run-time panic</a> occurs.
</p>

<h3 id="Type_assertions">Type assertions</h3>

<p>
For an expression <code>x</code> of <a href="#Interface_types">interface type</a>
and a type <code>T</code>, the primary expression
</p>

<pre>
x.(T)
</pre>

other.
If the indices are out of range at run time, a <a href="#Run_time_panics">run-time panic</a> occurs.
</p>

<h3 id="Type_assertions">Type assertions</h3>

<p>
For an expression <code>x</code> of <a href="#Interface_types">interface type</a>,
but not a <a href="#Type_parameter_declarations">type parameter</a>, and a type <code>T</code>,

type typeConv struct {
	// Cache of already-translated or in-progress types.
	m map[string]*Type

	// Map from types to incomplete pointers to those types.
	ptrs map[string][]*Type
	// Keys of ptrs in insertion order (deterministic worklist)
	// ptrKeys contains exactly the keys in ptrs.
	ptrKeys []dwarf.Type

	// Type names X for which there exists an XGetTypeID function with type func() CFTypeID.

// a semicolon. We only have to worry about cases that can occur in an
// expression passed through gofmt, which means composite literals and
// (due to the printer possibly inserting newlines because of position
// information) operators.
var gofmtLineReplacer = strings.NewReplacer(
	// Want to replace \n without ; after everything from
	// https://golang.org/ref/spec#Operators_and_punctuation