// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package lex

import (
	"go/build/constraint"
	"io"
	"os"
	"strings"
	"text/scanner"
	"unicode"

	"cmd/asm/internal/flags"
	"cmd/internal/objabi"
	"cmd/internal/src"
)

// A Tokenizer is a simple wrapping of text/scanner.Scanner, configured

environment variable when running the go tool: set it to 1 to enable
the use of cgo, and to 0 to disable it. The go tool will set the
build constraint "cgo" if cgo is enabled. The special import "C"
implies the "cgo" build constraint, as though the file also said
"//go:build cgo".  Therefore, if cgo is disabled, files that import
"C" will not be built by the go tool. (For more about build constraints

pkg go/types, method (*Term) Tilde() bool
pkg go/types, method (*Term) Type() Type
pkg go/types, method (*TypeList) At(int) Type
pkg go/types, method (*TypeList) Len() int
pkg go/types, method (*TypeParam) Constraint() Type
pkg go/types, method (*TypeParam) Index() int
pkg go/types, method (*TypeParam) Obj() *TypeName
pkg go/types, method (*TypeParam) SetConstraint(Type)
pkg go/types, method (*TypeParam) String() string

values or variables, or components of other, non-interface types.
</p>

<h4 id="Satisfying_a_type_constraint">Satisfying a type constraint</h4>

<p>
A type argument <code>T</code><i> satisfies</i> a type constraint <code>C</code>
if <code>T</code> is an element of the type set defined by <code>C</code>; i.e.,

pkg go/build/constraint, type AndExpr struct, Y Expr
pkg go/build/constraint, type Expr interface, Eval(func(string) bool) bool
pkg go/build/constraint, type Expr interface, String() string
pkg go/build/constraint, type Expr interface, unexported methods
pkg go/build/constraint, type NotExpr struct
pkg go/build/constraint, type NotExpr struct, X Expr
pkg go/build/constraint, type OrExpr struct

// (booleans, numbers, strings, pointers, channels, arrays of comparable types,
// structs whose fields are all comparable types).
// The comparable interface may only be used as a type parameter constraint,
// not as the type of a variable.
type comparable interface{ comparable }

// iota is a predeclared identifier representing the untyped integer ordinal

FieldName     = identifier .
Element       = Expression | LiteralValue .
</pre>

<p>
The LiteralType's underlying type must be a struct, array, slice, or map type
(the grammar enforces this constraint except when the type is given
as a TypeName).
The types of the elements and keys must be <a href="#Assignability">assignable</a>
to the respective field, element, and key types of the literal type;

	n := typ.NumMethods()
	list := make([]string, n)
	for i := range list {
		list[i] = typ.Method(i).Name()
	}
	sort.Strings(list)
	return list
}

// sortedEmbeddeds returns constraint types embedded in an
// interface. It does not include embedded interface types or methods.
func (w *Walker) sortedEmbeddeds(typ *types.Interface) []string {
	n := typ.NumEmbeddeds()
	list := make([]string, 0, n)

pkg syscall (windows-386), const CERT_TRUST_HAS_NOT_DEFINED_NAME_CONSTRAINT ideal-int
pkg syscall (windows-386), const CERT_TRUST_HAS_NOT_PERMITTED_NAME_CONSTRAINT ideal-int
pkg syscall (windows-386), const CERT_TRUST_HAS_NOT_SUPPORTED_CRITICAL_EXT ideal-int
pkg syscall (windows-386), const CERT_TRUST_HAS_NOT_SUPPORTED_NAME_CONSTRAINT ideal-int

pkg syscall (windows-386), const CERT_TRUST_HAS_EXCLUDED_NAME_CONSTRAINT = 32768
pkg syscall (windows-386), const CERT_TRUST_HAS_NOT_DEFINED_NAME_CONSTRAINT = 8192
pkg syscall (windows-386), const CERT_TRUST_HAS_NOT_PERMITTED_NAME_CONSTRAINT = 16384
pkg syscall (windows-386), const CERT_TRUST_HAS_NOT_SUPPORTED_CRITICAL_EXT = 134217728
pkg syscall (windows-386), const CERT_TRUST_HAS_NOT_SUPPORTED_NAME_CONSTRAINT = 4096