eval_input()
public
Evaluates input for this session.
Show source
def eval_input
@scanner.set_prompt do
|ltype, indent, continue, line_no|
if ltype
f = @context.prompt_s
elsif continue
f = @context.prompt_c
elsif indent > 0
f = @context.prompt_n
else
f = @context.prompt_i
end
f = "" unless f
if @context.prompting?
@context.io.prompt = p = prompt(f, ltype, indent, line_no)
else
@context.io.prompt = p = ""
end
if @context.auto_indent_mode
unless ltype
ind = prompt(@context.prompt_i, ltype, indent, line_no)[/.*\z/].size +
indent * 2 - p.size
ind += 2 if continue
@context.io.prompt = p + " " * ind if ind > 0
end
end
end
@scanner.set_input(@context.io) do
signal_status(:IN_INPUT) do
if l = @context.io.gets
print l if @context.verbose?
else
if @context.ignore_eof? and @context.io.readable_after_eof?
l = "\n"
if @context.verbose?
printf "Use \"exit\" to leave %s\n", @context.ap_name
end
else
print "\n"
end
end
l
end
end
@scanner.each_top_level_statement do |line, line_no|
signal_status(:IN_EVAL) do
begin
line.untaint
@context.evaluate(line, line_no)
output_value if @context.echo?
exc = nil
rescue Interrupt => exc
rescue SystemExit, SignalException
raise
rescue Exception => exc
end
if exc
if exc.backtrace && exc.backtrace[0] =~ /irb(2)?(\/.*|-.*|\.rb)?:/ && exc.class.to_s !~ /^IRB/ &&
!(SyntaxError === exc)
irb_bug = true
else
irb_bug = false
end
messages = []
lasts = []
levels = 0
if exc.backtrace
count = 0
exc.backtrace.each do |m|
m = @context.workspace.filter_backtrace(m) or next unless irb_bug
m = sprintf("%9d: from %s", (count += 1), m)
if messages.size < @context.back_trace_limit
messages.push(m)
elsif lasts.size < @context.back_trace_limit
lasts.push(m).shift
levels += 1
end
end
end
attr = STDOUT.tty? ? ATTR_TTY : ATTR_PLAIN
print "#{attr[1]}Traceback#{attr[]} (most recent call last):\n"
unless lasts.empty?
puts lasts.reverse
printf "... %d levels...\n", levels if levels > 0
end
puts messages.reverse
messages = exc.to_s.split(/\n/)
print "#{attr[1]}#{exc.class} (#{attr[4]}#{messages.shift}#{attr[0, 1]})#{attr[]}\n"
puts messages.map {|s| "#{attr[1]}#{s}#{attr[]}\n"}
print "Maybe IRB bug!\n" if irb_bug
end
end
end
end