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ledger/src/filters.cc
John Wiegley 3909d2678e Removed most #if 0 blocks and callout comments
2009-10-31 04:50:07 -04:00

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/*
* Copyright (c) 2003-2009, John Wiegley. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of New Artisans LLC nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <system.hh>
#include "filters.h"
#include "iterators.h"
#include "journal.h"
#include "report.h"
#include "compare.h"
namespace ledger {
pass_down_posts::pass_down_posts(post_handler_ptr handler,
posts_iterator& iter)
: item_handler<post_t>(handler)
{
TRACE_CTOR(pass_down_posts, "post_handler_ptr, posts_iterator");
for (post_t * post = iter(); post; post = iter()) {
try {
item_handler<post_t>::operator()(*post);
}
catch (const std::exception& err) {
add_error_context(item_context(*post, _("While handling posting")));
throw;
}
}
item_handler<post_t>::flush();
}
void truncate_xacts::flush()
{
if (! posts.size())
return;
xact_t * xact = (*posts.begin())->xact;
int l = 0;
foreach (post_t * post, posts)
if (xact != post->xact) {
l++;
xact = post->xact;
}
l++;
xact = (*posts.begin())->xact;
int i = 0;
foreach (post_t * post, posts) {
if (xact != post->xact) {
xact = post->xact;
i++;
}
bool print = false;
if (head_count) {
if (head_count > 0 && i < head_count)
print = true;
else if (head_count < 0 && i >= - head_count)
print = true;
}
if (! print && tail_count) {
if (tail_count > 0 && l - i <= tail_count)
print = true;
else if (tail_count < 0 && l - i > - tail_count)
print = true;
}
if (print)
item_handler<post_t>::operator()(*post);
}
posts.clear();
item_handler<post_t>::flush();
}
void truncate_xacts::operator()(post_t& post)
{
if (last_xact != post.xact) {
if (last_xact)
xacts_seen++;
last_xact = post.xact;
}
if (tail_count == 0 && head_count > 0 &&
static_cast<int>(xacts_seen) >= head_count)
return;
posts.push_back(&post);
}
void sort_posts::post_accumulated_posts()
{
std::stable_sort(posts.begin(), posts.end(),
compare_items<post_t>(sort_order));
foreach (post_t * post, posts) {
post->xdata().drop_flags(POST_EXT_SORT_CALC);
item_handler<post_t>::operator()(*post);
}
posts.clear();
}
void anonymize_posts::operator()(post_t& post)
{
SHA1 sha;
uint_least32_t message_digest[5];
bool copy_xact_details = false;
if (last_xact != post.xact) {
temps.copy_xact(*post.xact);
last_xact = post.xact;
copy_xact_details = true;
}
xact_t& xact = temps.last_xact();
if (copy_xact_details) {
xact.copy_details(*post.xact);
sha.Reset();
sha << post.xact->payee.c_str();
sha.Result(message_digest);
xact.payee = to_hex(message_digest);
xact.note = none;
}
std::list<string> account_names;
account_t * new_account = NULL;
for (account_t * acct = post.account;
acct;
acct = acct->parent) {
if (! acct->parent) {
new_account = acct;
break;
}
sha.Reset();
sha << acct->name.c_str();
sha.Result(message_digest);
account_names.push_front(to_hex(message_digest));
}
assert(new_account);
foreach (const string& name, account_names)
new_account = new_account->find_account(name);
post_t& temp = temps.copy_post(post, xact, new_account);
temp.note = none;
(*handler)(temp);
}
void calc_posts::operator()(post_t& post)
{
post_t::xdata_t& xdata(post.xdata());
if (last_post) {
assert(last_post->has_xdata());
if (! account_wise)
xdata.total = last_post->xdata().total;
xdata.count = last_post->xdata().count + 1;
} else {
xdata.count = 1;
}
post.add_to_value(xdata.visited_value, amount_expr);
xdata.add_flags(POST_EXT_VISITED);
account_t * acct = post.reported_account();
acct->xdata().add_flags(ACCOUNT_EXT_VISITED);
if (! account_wise)
add_or_set_value(xdata.total, xdata.visited_value);
item_handler<post_t>::operator()(post);
last_post = &post;
}
namespace {
typedef function<void (post_t *)> post_functor_t;
void handle_value(const value_t& value,
account_t * account,
xact_t * xact,
temporaries_t& temps,
item_handler<post_t>& handler,
const date_t& date = date_t(),
const value_t& total = value_t(),
const bool direct_amount = false,
const optional<post_functor_t>& functor = none)
{
post_t& post = temps.create_post(*xact, account);
// If the account for this post is all virtual, then report the post as
// such. This allows subtotal reports to show "(Account)" for accounts
// that contain only virtual posts.
if (account && account->has_xdata() &&
account->xdata().has_flags(ACCOUNT_EXT_AUTO_VIRTUALIZE)) {
if (! account->xdata().has_flags(ACCOUNT_EXT_HAS_NON_VIRTUALS)) {
post.add_flags(POST_VIRTUAL);
if (! account->xdata().has_flags(ACCOUNT_EXT_HAS_UNB_VIRTUALS))
post.add_flags(POST_MUST_BALANCE);
}
}
post_t::xdata_t& xdata(post.xdata());
if (is_valid(date))
xdata.date = date;
value_t temp(value);
switch (value.type()) {
case value_t::BOOLEAN:
case value_t::INTEGER:
temp.in_place_cast(value_t::AMOUNT);
// fall through...
case value_t::AMOUNT:
post.amount = temp.as_amount();
break;
case value_t::BALANCE:
case value_t::SEQUENCE:
xdata.compound_value = temp;
xdata.add_flags(POST_EXT_COMPOUND);
break;
case value_t::DATETIME:
case value_t::DATE:
default:
assert(false);
break;
}
if (! total.is_null())
xdata.total = total;
if (direct_amount)
xdata.add_flags(POST_EXT_DIRECT_AMT);
if (functor)
(*functor)(&post);
DEBUG("filter.changed_value.rounding", "post.amount = " << post.amount);
handler(post);
}
}
void collapse_posts::report_subtotal()
{
if (! count)
return;
std::size_t displayed_count = 0;
foreach (post_t * post, component_posts) {
if (only_predicate(*post) && display_predicate(*post))
displayed_count++;
}
if (displayed_count == 1) {
item_handler<post_t>::operator()(*last_post);
}
else if (only_collapse_if_zero && ! subtotal.is_zero()) {
foreach (post_t * post, component_posts)
item_handler<post_t>::operator()(*post);
}
else {
date_t earliest_date;
foreach (post_t * post, component_posts) {
date_t reported = post->date();
if (! is_valid(earliest_date) ||
reported < earliest_date)
earliest_date = reported;
}
xact_t& xact = temps.create_xact();
xact.payee = last_xact->payee;
xact._date = (is_valid(earliest_date) ?
earliest_date : last_xact->_date);
DEBUG("filter.collapse", "Pseudo-xact date = " << *xact._date);
handle_value(subtotal, &totals_account, &xact, temps, *handler);
}
component_posts.clear();
last_xact = NULL;
last_post = NULL;
subtotal = 0L;
count = 0;
}
void collapse_posts::operator()(post_t& post)
{
// If we've reached a new xact, report on the subtotal
// accumulated thus far.
if (last_xact != post.xact && count > 0)
report_subtotal();
post.add_to_value(subtotal, amount_expr);
count++;
component_posts.push_back(&post);
last_xact = post.xact;
last_post = &post;
}
void related_posts::flush()
{
if (posts.size() > 0) {
foreach (post_t * post, posts) {
if (post->xact) {
foreach (post_t * r_post, post->xact->posts) {
post_t::xdata_t& xdata(r_post->xdata());
if (! xdata.has_flags(POST_EXT_HANDLED) &&
(! xdata.has_flags(POST_EXT_RECEIVED) ?
! r_post->has_flags(ITEM_GENERATED | POST_VIRTUAL) :
also_matching)) {
xdata.add_flags(POST_EXT_HANDLED);
item_handler<post_t>::operator()(*r_post);
}
}
} else {
// This code should only be reachable from the "output"
// command, since that is the only command which attempts to
// output auto or period xacts.
post_t::xdata_t& xdata(post->xdata());
if (! xdata.has_flags(POST_EXT_HANDLED) &&
! post->has_flags(ITEM_GENERATED)) {
xdata.add_flags(POST_EXT_HANDLED);
item_handler<post_t>::operator()(*post);
}
}
}
}
item_handler<post_t>::flush();
}
void changed_value_posts::flush()
{
if (last_post && last_post->date() <= report.terminus.date()) {
output_revaluation(last_post, report.terminus.date());
last_post = NULL;
}
item_handler<post_t>::flush();
}
void changed_value_posts::output_revaluation(post_t * post, const date_t& date)
{
if (is_valid(date))
post->xdata().date = date;
value_t repriced_total;
try {
bind_scope_t bound_scope(report, *post);
repriced_total = total_expr.calc(bound_scope);
}
catch (...) {
post->xdata().date = date_t();
throw;
}
post->xdata().date = date_t();
DEBUG("filter.changed_value",
"output_revaluation(last_balance) = " << last_total);
DEBUG("filter.changed_value",
"output_revaluation(repriced_total) = " << repriced_total);
if (! last_total.is_null()) {
if (value_t diff = repriced_total - last_total) {
DEBUG("filter.changed_value", "output_revaluation(strip(diff)) = "
<< diff.strip_annotations(report.what_to_keep()));
xact_t& xact = temps.create_xact();
xact.payee = _("Commodities revalued");
xact._date = is_valid(date) ? date : post->date();
handle_value(diff, &revalued_account, &xact, temps, *handler,
*xact._date, repriced_total, false,
optional<post_functor_t>
(bind(&changed_value_posts::output_rounding, this, _1)));
}
}
}
void changed_value_posts::output_rounding(post_t * post)
{
bind_scope_t bound_scope(report, *post);
value_t new_display_total(display_total_expr.calc(bound_scope));
DEBUG("filter.changed_value.rounding",
"rounding.new_display_total = " << new_display_total);
if (! last_display_total.is_null()) {
if (value_t repriced_amount = display_amount_expr.calc(bound_scope)) {
DEBUG("filter.changed_value.rounding",
"rounding.repriced_amount = " << repriced_amount);
value_t precise_display_total(new_display_total.truncated() -
repriced_amount.truncated());
DEBUG("filter.changed_value.rounding",
"rounding.precise_display_total = " << precise_display_total);
DEBUG("filter.changed_value.rounding",
"rounding.last_display_total = " << last_display_total);
if (value_t diff = precise_display_total - last_display_total) {
DEBUG("filter.changed_value.rounding",
"rounding.diff = " << diff);
xact_t& xact = temps.create_xact();
xact.payee = _("Commodity rounding");
xact._date = post->date();
handle_value(diff, &rounding_account, &xact, temps, *handler,
*xact._date, precise_display_total, true);
}
}
}
last_display_total = new_display_total;
}
void changed_value_posts::operator()(post_t& post)
{
if (last_post)
output_revaluation(last_post, post.date());
if (changed_values_only)
post.xdata().add_flags(POST_EXT_DISPLAYED);
output_rounding(&post);
item_handler<post_t>::operator()(post);
bind_scope_t bound_scope(report, post);
last_total = total_expr.calc(bound_scope);
last_post = &post;
}
void subtotal_posts::report_subtotal(const char * spec_fmt,
const optional<date_interval_t>& interval)
{
if (component_posts.empty())
return;
optional<date_t> range_start = interval ? interval->start : none;
optional<date_t> range_finish = interval ? interval->inclusive_end() : none;
foreach (post_t * post, component_posts) {
date_t date = post->date();
if (! range_start || date < *range_start)
range_start = date;
if (! range_finish || date > *range_finish)
range_finish = date;
}
component_posts.clear();
std::ostringstream out_date;
if (spec_fmt) {
out_date << format_date(*range_finish, FMT_CUSTOM, spec_fmt);
}
else if (date_format) {
out_date << "- " << format_date(*range_finish, FMT_CUSTOM,
date_format->c_str());
}
else {
out_date << "- " << format_date(*range_finish);
}
xact_t& xact = temps.create_xact();
xact.payee = out_date.str();
xact._date = *range_start;
foreach (values_map::value_type& pair, values)
handle_value(pair.second.value, pair.second.account, &xact, temps,
*handler);
values.clear();
}
void subtotal_posts::operator()(post_t& post)
{
component_posts.push_back(&post);
account_t * acct = post.reported_account();
assert(acct);
values_map::iterator i = values.find(acct->fullname());
if (i == values.end()) {
value_t temp;
post.add_to_value(temp, amount_expr);
std::pair<values_map::iterator, bool> result
= values.insert(values_pair(acct->fullname(), acct_value_t(acct, temp)));
assert(result.second);
} else {
post.add_to_value((*i).second.value, amount_expr);
}
// If the account for this post is all virtual, mark it as
// such, so that `handle_value' can show "(Account)" for accounts
// that contain only virtual posts.
post.reported_account()->xdata().add_flags(ACCOUNT_EXT_AUTO_VIRTUALIZE);
if (! post.has_flags(POST_VIRTUAL))
post.reported_account()->xdata().add_flags(ACCOUNT_EXT_HAS_NON_VIRTUALS);
else if (! post.has_flags(POST_MUST_BALANCE))
post.reported_account()->xdata().add_flags(ACCOUNT_EXT_HAS_UNB_VIRTUALS);
}
void interval_posts::report_subtotal(const date_interval_t& interval)
{
if (last_post && interval) {
if (exact_periods)
subtotal_posts::report_subtotal();
else
subtotal_posts::report_subtotal(NULL, interval);
}
last_post = NULL;
}
void interval_posts::operator()(post_t& post)
{
date_t date = post.date();
if (! interval.find_period(post.date()))
return;
if (interval.duration) {
if (last_interval && interval != last_interval) {
report_subtotal(last_interval);
if (generate_empty_posts) {
for (++last_interval; interval != last_interval; ++last_interval) {
// Generate a null posting, so the intervening periods can be
// seen when -E is used, or if the calculated amount ends up being
// non-zero
xact_t& null_xact = temps.create_xact();
null_xact._date = last_interval.inclusive_end();
post_t& null_post = temps.create_post(null_xact, &empty_account);
null_post.add_flags(POST_CALCULATED);
null_post.amount = 0L;
last_post = &null_post;
subtotal_posts::operator()(null_post);
report_subtotal(last_interval);
}
assert(interval == last_interval);
} else {
last_interval = interval;
}
} else {
last_interval = interval;
}
subtotal_posts::operator()(post);
} else {
item_handler<post_t>::operator()(post);
}
last_post = &post;
}
void posts_as_equity::report_subtotal()
{
date_t finish;
foreach (post_t * post, component_posts) {
date_t date = post->date();
if (! is_valid(finish) || date > finish)
finish = date;
}
component_posts.clear();
xact_t& xact = temps.create_xact();
xact.payee = _("Opening Balances");
xact._date = finish;
value_t total = 0L;
foreach (values_map::value_type& pair, values) {
handle_value(pair.second.value, pair.second.account, &xact, temps,
*handler);
total += pair.second.value;
}
values.clear();
if (total.is_balance()) {
foreach (balance_t::amounts_map::value_type pair,
total.as_balance().amounts) {
post_t& balance_post = temps.create_post(xact, balance_account);
balance_post.amount = - pair.second;
(*handler)(balance_post);
}
} else {
post_t& balance_post = temps.create_post(xact, balance_account);
balance_post.amount = - total.to_amount();
(*handler)(balance_post);
}
}
void by_payee_posts::flush()
{
foreach (payee_subtotals_map::value_type& pair, payee_subtotals)
pair.second->report_subtotal(pair.first.c_str());
item_handler<post_t>::flush();
payee_subtotals.clear();
}
void by_payee_posts::operator()(post_t& post)
{
payee_subtotals_map::iterator i = payee_subtotals.find(post.xact->payee);
if (i == payee_subtotals.end()) {
payee_subtotals_pair
temp(post.xact->payee,
shared_ptr<subtotal_posts>(new subtotal_posts(handler, amount_expr)));
std::pair<payee_subtotals_map::iterator, bool> result
= payee_subtotals.insert(temp);
assert(result.second);
if (! result.second)
return;
i = result.first;
}
(*(*i).second)(post);
}
void transfer_details::operator()(post_t& post)
{
xact_t& xact = temps.copy_xact(*post.xact);
xact._date = post.date();
post_t& temp = temps.copy_post(post, xact);
temp.set_state(post.state());
bind_scope_t bound_scope(scope, temp);
switch (which_element) {
case SET_PAYEE:
xact.payee = expr.calc(bound_scope).to_string();
break;
case SET_ACCOUNT:
temp.account->remove_post(&temp);
temp.account = master->find_account(expr.calc(bound_scope).to_string());
temp.account->add_post(&temp);
break;
default:
assert(false);
break;
}
item_handler<post_t>::operator()(temp);
}
void dow_posts::flush()
{
for (int i = 0; i < 7; i++) {
foreach (post_t * post, days_of_the_week[i])
subtotal_posts::operator()(*post);
subtotal_posts::report_subtotal("%As");
days_of_the_week[i].clear();
}
subtotal_posts::flush();
}
void generate_posts::add_period_xacts(period_xacts_list& period_xacts)
{
foreach (period_xact_t * xact, period_xacts)
foreach (post_t * post, xact->posts)
add_post(xact->period, *post);
}
void generate_posts::add_post(const date_interval_t& period, post_t& post)
{
pending_posts.push_back(pending_posts_pair(period, &post));
}
void budget_posts::report_budget_items(const date_t& date)
{
if (pending_posts.size() == 0)
return;
bool reported;
do {
reported = false;
foreach (pending_posts_list::value_type& pair, pending_posts) {
optional<date_t> begin = pair.first.start;
if (! begin) {
if (! pair.first.find_period(date))
throw_(std::runtime_error, _("Something odd has happened"));
begin = pair.first.start;
}
assert(begin);
if (*begin < date &&
(! pair.first.end || *begin < *pair.first.end)) {
post_t& post = *pair.second;
DEBUG("ledger.walk.budget", "Reporting budget for "
<< post.reported_account()->fullname());
xact_t& xact = temps.create_xact();
xact.payee = _("Budget transaction");
xact._date = begin;
post_t& temp = temps.copy_post(post, xact);
temp.amount.in_place_negate();
if (flags & BUDGET_WRAP_VALUES) {
value_t seq;
seq.push_back(0L);
seq.push_back(temp.amount);
temp.xdata().compound_value = seq;
temp.xdata().add_flags(POST_EXT_COMPOUND);
}
++pair.first;
begin = *pair.first.start;
item_handler<post_t>::operator()(temp);
reported = true;
}
}
} while (reported);
}
void budget_posts::operator()(post_t& post)
{
bool post_in_budget = false;
foreach (pending_posts_list::value_type& pair, pending_posts) {
for (account_t * acct = post.reported_account();
acct;
acct = acct->parent) {
if (acct == (*pair.second).reported_account()) {
post_in_budget = true;
// Report the post as if it had occurred in the parent account.
if (post.reported_account() != acct)
post.xdata().account = acct;
goto handle;
}
}
}
handle:
if (post_in_budget && flags & BUDGET_BUDGETED) {
report_budget_items(post.date());
item_handler<post_t>::operator()(post);
}
else if (! post_in_budget && flags & BUDGET_UNBUDGETED) {
item_handler<post_t>::operator()(post);
}
}
void forecast_posts::add_post(const date_interval_t& period, post_t& post)
{
generate_posts::add_post(period, post);
// Advance the period's interval until it is at or beyond the current date.
date_interval_t& i = pending_posts.back().first;
if (! i.start) {
if (! i.find_period(CURRENT_DATE()))
throw_(std::runtime_error, _("Something odd has happened"));
++i;
} else {
while (*i.start < CURRENT_DATE())
++i;
}
}
void forecast_posts::flush()
{
posts_list passed;
date_t last = CURRENT_DATE();
// If there are period transactions to apply in a continuing series until
// the forecast condition is met, generate those transactions now. Note
// that no matter what, we abandon forecasting beyond the next 5 years.
//
// It works like this:
//
// Earlier, in forecast_posts::add_period_xacts, we cut up all the periodic
// transactions into their components postings, so that we have N "periodic
// postings". For example, if the user had this:
//
// ~ daily
// Expenses:Food $10
// Expenses:Auto:Gas $20
// ~ monthly
// Expenses:Food $100
// Expenses:Auto:Gas $200
//
// We now have 4 periodic postings in `pending_posts'.
//
// Each periodic postings gets its own copy of its parent transaction's
// period, which is modified as we go. This is found in the second member
// of the pending_posts_list for each posting.
//
// The algorithm below works by iterating through the N periodic postings
// over and over, until each of them mets the termination critera for the
// forecast and is removed from the set.
while (pending_posts.size() > 0) {
// At each step through the loop, we find the first periodic posting whose
// period contains the earliest starting date.
pending_posts_list::iterator least = pending_posts.begin();
for (pending_posts_list::iterator i = ++pending_posts.begin();
i != pending_posts.end();
i++) {
if (*(*i).first.start < *(*least).first.start)
least = i;
}
date_t& begin = *(*least).first.start;
if ((*least).first.end)
assert(begin < *(*least).first.end);
// If the next date in the series for this periodic posting is more than 5
// years beyond the last valid post we generated, drop it from further
// consideration.
date_t next = *(*least).first.next;
assert(next > begin);
if (static_cast<std::size_t>((next - last).days()) >
static_cast<std::size_t>(365U) * forecast_years) {
DEBUG("filters.forecast",
"Forecast transaction exceeds " << forecast_years
<< " years beyond today");
pending_posts.erase(least);
continue;
}
begin = next;
++(*least).first;
// `post' refers to the posting defined in the period transaction. We
// make a copy of it within a temporary transaction with the payee
// "Forecast transaction".
post_t& post = *(*least).second;
xact_t& xact = temps.create_xact();
xact.payee = _("Forecast transaction");
xact._date = begin;
post_t& temp = temps.copy_post(post, xact);
// Submit the generated posting
DEBUG("filters.forecast",
"Forecast transaction: " << temp.date()
<< " " << temp.account->fullname()
<< " " << temp.amount);
item_handler<post_t>::operator()(temp);
// If the generated posting matches the user's report query, check whether
// it also fails to match the continuation condition for the forecast. If
// it does, drop this periodic posting from consideration.
if (temp.has_xdata() && temp.xdata().has_flags(POST_EXT_MATCHES)) {
DEBUG("filters.forecast", " matches report query");
bind_scope_t bound_scope(context, temp);
if (! pred(bound_scope)) {
DEBUG("filters.forecast", " fails to match continuation criteria");
pending_posts.erase(least);
continue;
}
}
}
item_handler<post_t>::flush();
}
pass_down_accounts::pass_down_accounts(acct_handler_ptr handler,
accounts_iterator& iter,
const optional<item_predicate>& _pred,
const optional<scope_t&>& _context)
: item_handler<account_t>(handler), pred(_pred), context(_context)
{
TRACE_CTOR(pass_down_accounts, "acct_handler_ptr, accounts_iterator, ...");
for (account_t * account = iter(); account; account = iter()) {
if (! pred) {
item_handler<account_t>::operator()(*account);
} else {
bind_scope_t bound_scope(*context, *account);
if ((*pred)(bound_scope))
item_handler<account_t>::operator()(*account);
}
}
item_handler<account_t>::flush();
}
} // namespace ledger
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