// len(src) and len(dst).
func copy(dst, src []Type) int

// The delete built-in function deletes the element with the specified key
// (m[key]) from the map. If m is nil or there is no such element, delete
// is a no-op.
func delete(m map[Type]Type1, key Type)

// The len built-in function returns the length of v, according to its type:
//
//	Array: the number of elements in v.

<pre class="ebnf">
Expression = UnaryExpr | Expression binary_op Expression .
UnaryExpr  = PrimaryExpr | unary_op UnaryExpr .

binary_op  = "||" | "&amp;&amp;" | rel_op | add_op | mul_op .
rel_op     = "==" | "!=" | "&lt;" | "&lt;=" | ">" | ">=" .
add_op     = "+" | "-" | "|" | "^" .
mul_op     = "*" | "/" | "%" | "&lt;&lt;" | "&gt;&gt;" | "&amp;" | "&amp;^" .

unary_op   = "+" | "-" | "!" | "^" | "*" | "&amp;" | "&lt;-" .
</pre>

pkg regexp/syntax, const OpAlternate Op
pkg regexp/syntax, const OpAnyChar Op
pkg regexp/syntax, const OpAnyCharNotNL Op
pkg regexp/syntax, const OpBeginLine Op
pkg regexp/syntax, const OpBeginText Op
pkg regexp/syntax, const OpCapture Op
pkg regexp/syntax, const OpCharClass Op
pkg regexp/syntax, const OpConcat Op
pkg regexp/syntax, const OpEmptyMatch Op
pkg regexp/syntax, const OpEndLine Op

</ul>

<h3 id="special-instructions">Special instructions</h3>

<p>
The <code>PCALIGN</code> pseudo-instruction is used to indicate that the next instruction should be aligned
to a specified boundary by padding with no-op instructions.
</p>

<p>
It is currently supported on arm64, amd64, ppc64, loong64 and riscv64.

For example, the start of the <code>MOVD</code> instruction below is aligned to 32 bytes:
<pre>
PCALIGN $32

		if !ok || len(c.Args) != 1 {
			break
		}
		if !p.isType(c.Fun) && !p.isUnsafeData(c.Fun, false) {
			break
		}
		x = c.Args[0]
	}
	u, ok := x.(*ast.UnaryExpr)
	if !ok || u.Op != token.AND {
		return false
	}
	index, ok := u.X.(*ast.IndexExpr)
	if !ok {
		return false
	}

	addr := ""
	deref := ""
	if p.isVariable(index.X) {
		addr = "&"

pkg syscall (freebsd-arm64), const SYS___SYSCTL = 202
pkg syscall (freebsd-arm64), const SYS___SYSCTL ideal-int
pkg syscall (freebsd-arm64), const SYS__UMTX_OP = 454
pkg syscall (freebsd-arm64), const SYS__UMTX_OP ideal-int
pkg syscall (freebsd-arm64), const SYS_ABORT2 = 463
pkg syscall (freebsd-arm64), const SYS_ABORT2 ideal-int
pkg syscall (freebsd-arm64), const SYS_ACCEPT = 30

pkg syscall (freebsd-riscv64), const SYS_YIELD = 321 #53466
pkg syscall (freebsd-riscv64), const SYS_YIELD ideal-int #53466
pkg syscall (freebsd-riscv64), const SYS__UMTX_OP = 454 #53466
pkg syscall (freebsd-riscv64), const SYS__UMTX_OP ideal-int #53466
pkg syscall (freebsd-riscv64), const SYS___ACL_ACLCHECK_FD = 354 #53466
pkg syscall (freebsd-riscv64), const SYS___ACL_ACLCHECK_FD ideal-int #53466

pkg io/fs, type GlobFS interface, Open(string) (File, error)
pkg io/fs, type PathError struct
pkg io/fs, type PathError struct, Err error
pkg io/fs, type PathError struct, Op string
pkg io/fs, type PathError struct, Path string
pkg io/fs, type ReadDirFS interface { Open, ReadDir }
pkg io/fs, type ReadDirFS interface, Open(string) (File, error)

pkg debug/elf, const R_ALPHA_LITERAL = 4
pkg debug/elf, const R_ALPHA_LITUSE = 5
pkg debug/elf, const R_ALPHA_NONE = 0
pkg debug/elf, const R_ALPHA_OP_PRSHIFT = 15
pkg debug/elf, const R_ALPHA_OP_PSUB = 14
pkg debug/elf, const R_ALPHA_OP_PUSH = 12
pkg debug/elf, const R_ALPHA_OP_STORE = 13
pkg debug/elf, const R_ALPHA_REFLONG = 1
pkg debug/elf, const R_ALPHA_REFQUAD = 2
pkg debug/elf, const R_ALPHA_RELATIVE = 27

pkg os, type FileInfo interface, Size() int64
pkg os, type FileInfo interface, Sys() interface{}
pkg os, type FileMode uint32
pkg os, type PathError struct
pkg os, type PathError struct, Err error
pkg os, type PathError struct, Op string
pkg os, type PathError struct, Path string
pkg syscall (darwin-amd64), const ImplementsGetwd = false
pkg syscall (darwin-amd64), func Fchflags(string, int) error
pkg syscall (darwin-amd64-cgo), const ImplementsGetwd = false