def self.builtins
@builtins ||= %w(
append assign block call capture config_load debug extends
for foreach foreachelse break continue function if elseif
else include include_php insert ldelim rdelim literal nocache
php section sectionelse setfilter strip while
counter cycle eval fetch html_checkboxes html_image html_options
html_radios html_select_date html_select_time html_table
mailto math textformat
capitalize cat count_characters count_paragraphs
count_sentences count_words date_format default escape
from_charset indent lower nl2br regex_replace replace spacify
string_format strip strip_tags to_charset truncate unescape
upper wordwrap
)
end