//
// A zero Group is valid, has no limit on the number of active goroutines,
// and does not cancel on error.
type Group struct {
	cancel func(error)

	wg sync.WaitGroup

	sem chan token

	errOnce sync.Once
	err     error
}

func (g *Group) done() {
	if g.sem != nil {
		<-g.sem
	}
	g.wg.Done()
}

// WithContext returns a new Group and an associated Context derived from ctx.
//

	if err != nil {
		return nil, err
	}

	group := C._goboringcrypto_EC_GROUP_new_by_curve_name(nid)
	if group == nil {
		return nil, fail("EC_GROUP_new_by_curve_name")
	}
	defer C._goboringcrypto_EC_GROUP_free(group)
	key := C._goboringcrypto_EC_POINT_new(group)
	if key == nil {
		return nil, fail("EC_POINT_new")
	}

        group = {name: name, src: src, sumpos: 0, sumneg: 0, self: 0, places: []};
        groupMap.set(src, group);
        groups.push(group);
      }
      if (stack.Value < 0) {
	group.sumneg += -stack.Value;
      } else {
	group.sumpos += stack.Value;
      }
      group.self += (place.Pos == stack.Sources.length-1) ? stack.Value : 0;
      group.places.push(place);
    }

	8:  {lang: 0x529, script: 0x3c, group: 0x2, distance: 0x4},
	9:  {lang: 0x529, script: 0x3c, group: 0x82, distance: 0x4},
	10: {lang: 0x3a, script: 0x0, group: 0x80, distance: 0x5},
	11: {lang: 0x139, script: 0x0, group: 0x80, distance: 0x5},
	12: {lang: 0x13e, script: 0x0, group: 0x80, distance: 0x5},
	13: {lang: 0x3c0, script: 0x0, group: 0x80, distance: 0x5},
	14: {lang: 0x529, script: 0x3c, group: 0x80, distance: 0x5},

			// There was some kind of serious error reading nm's output.
			return nil, err
		}

		// If this symbol is at the same address as the current group, add it to the group.
		if symAddr == start {
			names = append(names, name)
			continue
		}

		// Otherwise append the current group to the list of symbols.
		if match := matchSymbol(names, start, symAddr-1, r, address); match != nil {

		return nil, fail("EC_KEY_new_by_curve_name")
	}
	group := C._goboringcrypto_EC_KEY_get0_group(key)
	pt := C._goboringcrypto_EC_POINT_new(group)
	if pt == nil {
		C._goboringcrypto_EC_KEY_free(key)
		return nil, fail("EC_POINT_new")
	}
	bx := bigToBN(X)
	by := bigToBN(Y)
	ok := bx != nil && by != nil && C._goboringcrypto_EC_POINT_set_affine_coordinates_GFp(group, pt, bx, by, nil) != 0 &&

	}

	// Name Type
	TypeDecl struct {
		Group      *Group // nil means not part of a group
		Pragma     Pragma
		Name       *Name
		TParamList []*Field // nil means no type parameters
		Alias      bool
		Type       Expr
		decl
	}

	// NameList Type
	// NameList Type = Values
	// NameList      = Values
	VarDecl struct {
		Group    *Group // nil means not part of a group
		Pragma   Pragma
		NameList []*Name

}

func checkGoFile(pass *analysis.Pass, f *ast.File) {
	pastCutoff := false
	for _, group := range f.Comments {
		// A +build comment is ignored after or adjoining the package declaration.
		if group.End()+1 >= f.Package {
			pastCutoff = true
		}

		// "+build" is ignored within or after a /*...*/ comment.
		if !strings.HasPrefix(group.List[0].Text, "//") {
			pastCutoff = true
			continue
		}

		}
		// Accumulate groups by Name.
		groupsByName := make(map[string]goroutineGroup)
		for _, summary := range summaries {
			group := groupsByName[summary.Name]
			group.Name = summary.Name
			group.N++
			group.ExecTime += summary.ExecTime
			groupsByName[summary.Name] = group
		}
		var groups []goroutineGroup
		for _, group := range groupsByName {
			groups = append(groups, group)
		}

			if label != "" {
				// add phase to existing group, or start a new group
				l := commonPrefix(group.label, label)
				if group.size == 1 && l != "" || group.size > 1 && l == group.label {
					// add to existing group
					group.label = l
					group.tot += dt
					group.size++
				} else {
					// start a new group
					if group.size > 1 {
						lines.add(prefix+group.label+"subtotal", 1, group.tot, tot, nil)
					}