// This file implements printing of syntax trees in source format.

package syntax

import (
	"fmt"
	"io"
	"strings"
)

// Form controls print formatting.
type Form uint

const (
	_         Form = iota // default
	LineForm              // use spaces instead of linebreaks where possible
	ShortForm             // like LineForm but print "…" for non-empty function or composite literal bodies
)

	scope         *Scope                    // top-most scope for lookups
	pos           syntax.Pos                // if valid, identifiers are looked up as if at position pos (used by Eval)
	iota          constant.Value            // value of iota in a constant declaration; nil otherwise
	errpos        syntax.Pos                // if valid, identifier position of a constant with inherited initializer

}

// A Kind represents the specific kind of type that a Type represents.
// The zero Kind is not a valid kind.
type Kind uint8

const (
	Invalid Kind = iota
	Bool
	Int
	Int8
	Int16
	Int32
	Int64
	Uint
	Uint8
	Uint16
	Uint32
	Uint64
	Uintptr
	Float32
	Float64
	Complex64
	Complex128
	Array
	Chan
	Func
	Interface
	Map

	// Diffie-Hellman. This means that it should only be selected when the
	// client indicates that it supports ECC with a curve and point format
	// that we're happy with.
	suiteECDHE = 1 << iota
	// suiteECSign indicates that the cipher suite involves an ECDSA or
	// EdDSA signature and therefore may only be selected when the server's
	// certificate is ECDSA or EdDSA. If this is not set then the cipher suite

			return &labelError{s, "V6"}
		}
		i += sz
	}
	return nil
}

const (
	zwnj = "\u200c"
	zwj  = "\u200d"
)

type joinState int8

const (
	stateStart joinState = iota
	stateVirama
	stateBefore
	stateBeforeVirama
	stateAfter
	stateFAIL
)

var joinStates = [][numJoinTypes]joinState{
	stateStart: {
		joiningL:   stateBefore,
		joiningD:   stateBefore,

// Formatting can be controlled with these flags.
const (
	// Ignore html tags and treat entities (starting with '&'
	// and ending in ';') as single characters (width = 1).
	FilterHTML uint = 1 << iota

	// Strip Escape characters bracketing escaped text segments
	// instead of passing them through unchanged with the text.
	StripEscape

	// Force right-alignment of cell content.
	// Default is left-alignment.

func syscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)

// Constant expected by package but not supported
const (
	_ = iota
	TIOCSCTTY
	SYS_EXECVE
	SYS_FCNTL
)

const (
	F_DUPFD_CLOEXEC = 0
	// AF_LOCAL doesn't exist on AIX
	AF_LOCAL = AF_UNIX

	_F_DUP2FD_CLOEXEC = 0
)

	"cmd/compile/internal/syntax"
	"fmt"
	"go/constant"
	. "internal/types/errors"
)

// An operandMode specifies the (addressing) mode of an operand.
type operandMode byte

const (
	invalid   operandMode = iota // operand is invalid
	novalue                      // operand represents no value (result of a function call w/o result)
	builtin                      // operand is a built-in function

	}
	return nil
}

// pathKind indicates what kind of path we're checking. Module paths,
// import paths, and file paths have different restrictions.
type pathKind int

const (
	modulePath pathKind = iota
	importPath
	filePath
)

// checkPath checks that a general path is valid. kind indicates what
// specific constraints should be applied.
//

	"make":    true,
	"new":     true,
	"panic":   true,
	"print":   true,
	"println": true,
	"real":    true,
	"recover": true,
}

var predeclaredConstants = map[string]bool{
	"false": true,
	"iota":  true,
	"nil":   true,
	"true":  true,
}

// assumedPackageName returns the assumed package name
// for a given import path. This is a copy of
// golang.org/x/tools/internal/imports.ImportPathToAssumedName.