/usr/lib/ruby/vendor_ruby/erubis/engine/optimized.rb is in ruby-erubis 2.7.0-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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## $Release: 2.7.0 $
## copyright(c) 2006-2011 kuwata-lab.com all rights reserved.
##
require 'erubis/engine/eruby'
module Erubis
module OptimizedGenerator
include Generator
def self.supported_properties() # :nodoc:
return []
end
def init_generator(properties={})
super
@escapefunc ||= "Erubis::XmlHelper.escape_xml"
@initialized = false
@prev_is_expr = false
end
protected
def escape_text(text)
text.gsub(/['\\]/, '\\\\\&') # "'" => "\\'", '\\' => '\\\\'
end
def escaped_expr(code)
@escapefunc ||= 'Erubis::XmlHelper.escape_xml'
return "#{@escapefunc}(#{code})"
end
def switch_to_expr(src)
return if @prev_is_expr
@prev_is_expr = true
src << ' _buf'
end
def switch_to_stmt(src)
return unless @prev_is_expr
@prev_is_expr = false
src << ';'
end
def add_preamble(src)
#@initialized = false
#@prev_is_expr = false
end
def add_text(src, text)
return if text.empty?
if @initialized
switch_to_expr(src)
src << " << '" << escape_text(text) << "'"
else
src << "_buf = '" << escape_text(text) << "';"
@initialized = true
end
end
def add_stmt(src, code)
switch_to_stmt(src) if @initialized
#super
src << code
src << ';' unless code[-1] == ?\n
end
def add_expr_literal(src, code)
unless @initialized; src << "_buf = ''"; @initialized = true; end
switch_to_expr(src)
src << " << (" << code << ").to_s"
end
def add_expr_escaped(src, code)
unless @initialized; src << "_buf = ''"; @initialized = true; end
switch_to_expr(src)
src << " << " << escaped_expr(code)
end
def add_expr_debug(src, code)
code.strip!
s = (code.dump =~ /\A"(.*)"\z/) && $1
src << ' $stderr.puts("*** debug: ' << s << '=#{(' << code << ').inspect}");'
end
def add_postamble(src)
#super if @initialized
src << "\n_buf\n" if @initialized
end
end # end of class OptimizedEruby
##
## Eruby class which generates optimized ruby code
##
class OptimizedEruby < Basic::Engine # Eruby
include RubyEvaluator
include OptimizedGenerator
def init_converter(properties={})
@pi = 'rb'
super(properties)
end
end
##
## XmlEruby class which generates optimized ruby code
##
class OptimizedXmlEruby < OptimizedEruby
include EscapeEnhancer
def add_expr_debug(src, code)
switch_to_stmt(src) if indicator == '===' && !@initialized
super
end
end # end of class OptimizedXmlEruby
end
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