go/src/cmd/compile/internal/types2/conversions.go

// conversion type-checks the conversion T(x).
// The result is in x.
func (check *Checker) conversion(x *operand, T Type) { … }

// convertibleTo reports whether T(x) is valid. In the failure case, *cause
// may be set to the cause for the failure.
// The check parameter may be nil if convertibleTo is invoked through an
// exported API call, i.e., when all methods have been type-checked.
func (x *operand) convertibleTo(check *Checker, T Type, cause *string) bool { … }

func isUintptr(typ Type) bool { … }

func isUnsafePointer(typ Type) bool { … }

func isPointer(typ Type) bool { … }

func isBytesOrRunes(typ Type) bool { … }