func TestSmoke(t *testing.T) {
	const src = "if (+foo\t+=..123/***/0.9_0e-0i'a'`raw`\"string\"..f;//$"
	tokens := []token{_If, _Lparen, _Operator, _Name, _AssignOp, _Dot, _Literal, _Literal, _Literal, _Literal, _Literal, _Dot, _Dot, _Name, _Semi, _EOF}

	var got scanner
	got.init(strings.NewReader(src), errh, 0)
	for _, want := range tokens {
		got.next()
		if got.tok != want {
			t.Errorf("%d:%d: got %s; want %s", got.line, got.col, got.tok, want)

// Go source. After initialization, consecutive calls of
// next advance the scanner one token at a time.
//
// This file, source.go, tokens.go, and token_string.go are self-contained
// (`go tool compile scanner.go source.go tokens.go token_string.go` compiles)
// and thus could be made into their own package.

package syntax

import (
	"fmt"
	"io"
	"unicode"
	"unicode/utf8"
)

		expect64(t, "g", g, float64(int64(0x7fffffffffffffff)))
		expect64(t, "h", h, float64(uint64(0xffffffffffffffff)))
		expect64(t, "i", i, float64(float32(3.402823e38)))
	}
	{
		// Check minimum values (and tweaks for unsigned)
		a, b, c, d, e, f, g, h, i := conv2Float64_ssa(-128, 254, -32768, 65534, ^0x7fffffff, 0xfffffffe, ^0x7fffFFFFffffFFFF, 0xffffFFFFffffF401, 1.5e-45)
		expect64(t, "a", a, -128)
		expect64(t, "b", b, 254)

	}
}

// have reports whether the remaining tokens (including the current one) contain the specified token.
func (p *Parser) have(token lex.ScanToken) bool {
	for i := p.inputPos; i < len(p.input); i++ {
		if p.input[i].ScanToken == token {
			return true
		}
	}
	return false
}

// at reports whether the next tokens are as requested.
func (p *Parser) at(next ...lex.ScanToken) bool {

	// unaligned loads and unaligned stores.
	if !f.Config.unalignedOK {
		return
	}

	memcombineLoads(f)
	memcombineStores(f)
}

func memcombineLoads(f *Func) {
	// Find "OR trees" to start with.
	mark := f.newSparseSet(f.NumValues())
	defer f.retSparseSet(mark)
	var order []*Value

	// Mark all values that are the argument of an OR.
	for _, b := range f.Blocks {
		for _, v := range b.Values {

//
//	if #next op c { [#next = 0;] thens... }
func (r *rewriter) ifNext(op syntax.Operator, c int, zeroNext bool, thens ...syntax.Stmt) syntax.Stmt {
	var thenList []syntax.Stmt
	if zeroNext {
		clr := &syntax.AssignStmt{
			Lhs: r.next(),
			Rhs: r.intConst(0),
		}
		thenList = append(thenList, clr)
	}
	for _, then := range thens {
		thenList = append(thenList, then)
	}

		_Break, _Continue, _Fallthrough, _Return,
		/*_Inc, _Dec,*/ _Rparen, _Rbrack, _Rbrace: // TODO(gri) fix this
		return true
	}
	return false
}

// TODO(gri) provide table of []byte values for all tokens to avoid repeated string conversion

func lineComment(text string) bool {
	return strings.HasPrefix(text, "//")
}

func (p *printer) addWhitespace(kind ctrlSymbol, text string) {

		fmt.Printf("--- %s ---\n", filename)
		fmt.Printf("%s\n", bytes1)
		fmt.Println()

		fmt.Printf("--- %s ---\n", filename)
		fmt.Printf("%s\n", bytes2)
		fmt.Println()

		t.Error("printed syntax trees do not match")
	}
}

func TestIssue17697(t *testing.T) {
	_, err := Parse(nil, bytes.NewReader(nil), nil, nil, 0) // return with parser error, don't panic
	if err == nil {
		t.Errorf("no error reported")
	}

		return
	}
	actuals := in.argsFor(macro)
	var tokens []Token
	for _, tok := range macro.tokens {
		if tok.ScanToken != scanner.Ident {
			tokens = append(tokens, tok)
			continue
		}
		substitution := actuals[tok.text]
		if substitution == nil {
			tokens = append(tokens, tok)
			continue
		}
		tokens = append(tokens, substitution...)
	}
	in.Push(NewSlice(in.Base(), in.Line(), tokens))

			last.Cond = &ast.BinaryExpr{
				Op: token.LOR,
				X:  last.Cond,
				Y:  node.Cond,
			}
			return
		}
	}

	w.List = append(w.List, node)
}

// predeclared contains globally known tokens that should not be redefined.
var predeclared = map[string]bool{
	"nil":   true,
	"false": true,
	"true":  true,
}

// declared reports if the body contains a Declare with the given name.