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synced 2022-11-09 12:17:21 -05:00
8b8cc01229
A closed brace in auto-indent shouldn't affect the next brace in the same line,
but it behaves like below:
p() {
}
It's a bug.
fbe59e344f
493 lines
14 KiB
Ruby
493 lines
14 KiB
Ruby
# frozen_string_literal: false
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#
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# irb/ruby-lex.rb - ruby lexcal analyzer
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# $Release Version: 0.9.6$
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# $Revision$
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# by Keiju ISHITSUKA(keiju@ruby-lang.org)
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#
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# --
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#
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#
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#
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require "ripper"
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# :stopdoc:
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class RubyLex
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class TerminateLineInput < StandardError
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def initialize
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super("Terminate Line Input")
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end
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end
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def initialize
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@exp_line_no = @line_no = 1
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@indent = 0
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@continue = false
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@line = ""
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@prompt = nil
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end
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# io functions
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def set_input(io, p = nil, &block)
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@io = io
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if @io.respond_to?(:check_termination)
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@io.check_termination do |code|
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code.gsub!(/\s*\z/, '').concat("\n")
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ltype, indent, continue, code_block_open = check_state(code)
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if ltype or indent > 0 or continue or code_block_open
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false
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else
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true
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end
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end
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end
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if @io.respond_to?(:dynamic_prompt)
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@io.dynamic_prompt do |lines|
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lines << '' if lines.empty?
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result = []
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lines.each_index { |i|
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c = lines[0..i].map{ |l| l + "\n" }.join
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ltype, indent, continue, code_block_open = check_state(c)
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result << @prompt.call(ltype, indent, continue || code_block_open, @line_no + i)
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}
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result
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end
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end
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if p.respond_to?(:call)
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@input = p
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elsif block_given?
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@input = block
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else
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@input = Proc.new{@io.gets}
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end
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end
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def set_prompt(p = nil, &block)
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p = block if block_given?
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if p.respond_to?(:call)
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@prompt = p
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else
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@prompt = Proc.new{print p}
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end
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end
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def ripper_lex_without_warning(code)
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verbose, $VERBOSE = $VERBOSE, nil
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tokens = Ripper.lex(code)
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$VERBOSE = verbose
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tokens
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end
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def set_auto_indent(context)
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if @io.respond_to?(:auto_indent) and context.auto_indent_mode
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@io.auto_indent do |lines, line_index, byte_pointer, is_newline|
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if is_newline
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md = lines[line_index - 1].match(/(\A +)/)
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prev_spaces = md.nil? ? 0 : md[1].count(' ')
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@tokens = ripper_lex_without_warning(lines[0..line_index].join("\n"))
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depth_difference = check_newline_depth_difference
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prev_spaces + depth_difference * 2
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else
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code = line_index.zero? ? '' : lines[0..(line_index - 1)].map{ |l| l + "\n" }.join
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last_line = lines[line_index]&.byteslice(0, byte_pointer)
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code += last_line if last_line
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@tokens = ripper_lex_without_warning(code)
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corresponding_token_depth = check_corresponding_token_depth
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if corresponding_token_depth
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corresponding_token_depth
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else
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nil
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end
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end
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end
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end
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end
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def check_state(code)
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@tokens = ripper_lex_without_warning(code)
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ltype = process_literal_type
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indent = process_nesting_level
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continue = process_continue
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code_block_open = check_code_block(code)
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[ltype, indent, continue, code_block_open]
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end
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def prompt
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if @prompt
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@prompt.call(@ltype, @indent, @continue, @line_no)
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end
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end
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def initialize_input
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@ltype = nil
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@indent = 0
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@continue = false
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@line = ""
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@exp_line_no = @line_no
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@code_block_open = false
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end
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def each_top_level_statement
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initialize_input
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catch(:TERM_INPUT) do
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loop do
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begin
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prompt
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unless l = lex
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throw :TERM_INPUT if @line == ''
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else
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@line_no += l.count("\n")
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next if l == "\n"
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@line.concat l
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if @code_block_open or @ltype or @continue or @indent > 0
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next
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end
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end
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if @line != "\n"
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@line.force_encoding(@io.encoding)
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yield @line, @exp_line_no
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end
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break if @io.eof?
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@line = ''
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@exp_line_no = @line_no
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@indent = 0
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rescue TerminateLineInput
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initialize_input
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prompt
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end
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end
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end
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end
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def lex
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line = @input.call
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if @io.respond_to?(:check_termination)
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return line # multiline
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end
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code = @line + (line.nil? ? '' : line)
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code.gsub!(/\s*\z/, '').concat("\n")
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@tokens = ripper_lex_without_warning(code)
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@continue = process_continue
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@code_block_open = check_code_block(code)
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@indent = process_nesting_level
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@ltype = process_literal_type
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line
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end
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def process_continue
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# last token is always newline
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if @tokens.size >= 2 and @tokens[-2][1] == :on_regexp_end
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# end of regexp literal
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return false
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elsif @tokens.size >= 2 and @tokens[-2][1] == :on_semicolon
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return false
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elsif @tokens.size >= 2 and @tokens[-2][1] == :on_kw and ['begin', 'else', 'ensure'].include?(@tokens[-2][2])
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return false
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elsif !@tokens.empty? and @tokens.last[2] == "\\\n"
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return true
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elsif @tokens.size >= 1 and @tokens[-1][1] == :on_heredoc_end # "EOH\n"
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return false
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elsif @tokens.size >= 2 and defined?(Ripper::EXPR_BEG) and @tokens[-2][3].anybits?(Ripper::EXPR_BEG | Ripper::EXPR_FNAME)
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# end of literal except for regexp
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return true
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end
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false
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end
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def check_code_block(code)
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return true if @tokens.empty?
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if @tokens.last[1] == :on_heredoc_beg
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return true
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end
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begin # check if parser error are available
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verbose, $VERBOSE = $VERBOSE, nil
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case RUBY_ENGINE
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when 'jruby'
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JRuby.compile_ir(code)
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else
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RubyVM::InstructionSequence.compile(code)
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end
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rescue SyntaxError => e
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case e.message
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when /unterminated (?:string|regexp) meets end of file/
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# "unterminated regexp meets end of file"
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#
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# example:
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# /
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#
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# "unterminated string meets end of file"
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#
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# example:
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# '
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return true
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when /syntax error, unexpected end-of-input/
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# "syntax error, unexpected end-of-input, expecting keyword_end"
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#
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# example:
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# if ture
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# hoge
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# if false
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# fuga
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# end
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return true
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when /syntax error, unexpected keyword_end/
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# "syntax error, unexpected keyword_end"
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#
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# example:
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# if (
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# end
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#
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# example:
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# end
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return false
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when /syntax error, unexpected '\.'/
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# "syntax error, unexpected '.'"
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#
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# example:
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# .
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return false
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when /unexpected tREGEXP_BEG/
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# "syntax error, unexpected tREGEXP_BEG, expecting keyword_do or '{' or '('"
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#
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# example:
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# method / f /
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return false
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end
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ensure
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$VERBOSE = verbose
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end
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if defined?(Ripper::EXPR_BEG)
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last_lex_state = @tokens.last[3]
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if last_lex_state.allbits?(Ripper::EXPR_BEG)
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return false
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elsif last_lex_state.allbits?(Ripper::EXPR_DOT)
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return true
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elsif last_lex_state.allbits?(Ripper::EXPR_CLASS)
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return true
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elsif last_lex_state.allbits?(Ripper::EXPR_FNAME)
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return true
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elsif last_lex_state.allbits?(Ripper::EXPR_VALUE)
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return true
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elsif last_lex_state.allbits?(Ripper::EXPR_ARG)
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return false
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end
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end
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false
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end
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def process_nesting_level
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indent = 0
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@tokens.each_with_index { |t, index|
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case t[1]
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when :on_lbracket, :on_lbrace, :on_lparen
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indent += 1
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when :on_rbracket, :on_rbrace, :on_rparen
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indent -= 1
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when :on_kw
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next if index > 0 and @tokens[index - 1][3].allbits?(Ripper::EXPR_FNAME)
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case t[2]
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when 'do'
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if index > 0 and @tokens[index - 1][3].anybits?(Ripper::EXPR_CMDARG | Ripper::EXPR_ENDFN | Ripper::EXPR_ARG)
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# method_with_block do; end
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indent += 1
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else
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# while cond do; end # also "until" or "for"
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# This "do" doesn't increment indent because "while" already
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# incremented.
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end
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when 'def', 'case', 'for', 'begin', 'class', 'module'
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indent += 1
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when 'if', 'unless', 'while', 'until'
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# postfix if/unless/while/until/rescue must be Ripper::EXPR_LABEL
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indent += 1 unless t[3].allbits?(Ripper::EXPR_LABEL)
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when 'end'
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indent -= 1
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end
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end
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# percent literals are not indented
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}
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indent
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end
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def check_newline_depth_difference
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depth_difference = 0
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open_brace_on_line = 0
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@tokens.each_with_index do |t, index|
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case t[1]
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when :on_ignored_nl, :on_nl, :on_comment
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if index != (@tokens.size - 1)
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depth_difference = 0
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open_brace_on_line = 0
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end
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next
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when :on_sp
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next
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end
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case t[1]
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when :on_lbracket, :on_lbrace, :on_lparen
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depth_difference += 1
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open_brace_on_line += 1
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when :on_rbracket, :on_rbrace, :on_rparen
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depth_difference -= 1 if open_brace_on_line > 0
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when :on_kw
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next if index > 0 and @tokens[index - 1][3].allbits?(Ripper::EXPR_FNAME)
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case t[2]
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when 'do'
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if index > 0 and @tokens[index - 1][3].anybits?(Ripper::EXPR_CMDARG | Ripper::EXPR_ENDFN | Ripper::EXPR_ARG)
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# method_with_block do; end
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depth_difference += 1
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else
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# while cond do; end # also "until" or "for"
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# This "do" doesn't increment indent because "while" already
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# incremented.
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end
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when 'def', 'case', 'for', 'begin', 'class', 'module'
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depth_difference += 1
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when 'if', 'unless', 'while', 'until'
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# postfix if/unless/while/until/rescue must be Ripper::EXPR_LABEL
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unless t[3].allbits?(Ripper::EXPR_LABEL)
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depth_difference += 1
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end
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when 'else', 'elsif', 'rescue', 'ensure', 'when', 'in'
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depth_difference += 1
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end
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end
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end
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depth_difference
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end
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def check_corresponding_token_depth
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corresponding_token_depth = nil
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is_first_spaces_of_line = true
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is_first_printable_of_line = true
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spaces_of_nest = []
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spaces_at_line_head = 0
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open_brace_on_line = 0
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@tokens.each_with_index do |t, index|
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case t[1]
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when :on_ignored_nl, :on_nl, :on_comment
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corresponding_token_depth = nil
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spaces_at_line_head = 0
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is_first_spaces_of_line = true
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is_first_printable_of_line = true
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open_brace_on_line = 0
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next
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when :on_sp
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spaces_at_line_head = t[2].count(' ') if is_first_spaces_of_line
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is_first_spaces_of_line = false
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next
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end
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case t[1]
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when :on_lbracket, :on_lbrace, :on_lparen
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spaces_of_nest.push(spaces_at_line_head + open_brace_on_line * 2)
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open_brace_on_line += 1
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when :on_rbracket, :on_rbrace, :on_rparen
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if is_first_printable_of_line
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corresponding_token_depth = spaces_of_nest.pop
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else
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spaces_of_nest.pop
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corresponding_token_depth = nil
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end
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open_brace_on_line -= 1
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when :on_kw
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next if index > 0 and @tokens[index - 1][3].allbits?(Ripper::EXPR_FNAME)
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case t[2]
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when 'def', 'do', 'case', 'for', 'begin', 'class', 'module'
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spaces_of_nest.push(spaces_at_line_head)
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when 'if', 'unless', 'while', 'until'
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# postfix if/unless/while/until/rescue must be Ripper::EXPR_LABEL
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unless t[3].allbits?(Ripper::EXPR_LABEL)
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spaces_of_nest.push(spaces_at_line_head)
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end
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when 'else', 'elsif', 'rescue', 'ensure', 'when', 'in'
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corresponding_token_depth = spaces_of_nest.last
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when 'end'
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if is_first_printable_of_line
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corresponding_token_depth = spaces_of_nest.pop
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else
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spaces_of_nest.pop
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corresponding_token_depth = nil
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end
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end
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end
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is_first_spaces_of_line = false
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is_first_printable_of_line = false
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end
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corresponding_token_depth
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end
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def check_string_literal
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i = 0
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start_token = []
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end_type = []
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while i < @tokens.size
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t = @tokens[i]
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case t[1]
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when :on_tstring_beg
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start_token << t
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end_type << [:on_tstring_end, :on_label_end]
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when :on_regexp_beg
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start_token << t
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end_type << :on_regexp_end
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when :on_symbeg
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acceptable_single_tokens = %i{on_ident on_const on_op on_cvar on_ivar on_gvar on_kw}
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if (i + 1) < @tokens.size and acceptable_single_tokens.all?{ |t| @tokens[i + 1][1] != t }
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start_token << t
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end_type << :on_tstring_end
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end
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when :on_backtick
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start_token << t
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end_type << :on_tstring_end
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when :on_qwords_beg, :on_words_beg, :on_qsymbols_beg, :on_symbols_beg
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start_token << t
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end_type << :on_tstring_end
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when :on_heredoc_beg
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start_token << t
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end_type << :on_heredoc_end
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when *end_type.last
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start_token.pop
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end_type.pop
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end
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i += 1
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end
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start_token.last.nil? ? '' : start_token.last
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end
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def process_literal_type
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start_token = check_string_literal
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case start_token[1]
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when :on_tstring_beg
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case start_token[2]
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when ?" then ?"
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when /^%.$/ then ?"
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when /^%Q.$/ then ?"
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when ?' then ?'
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when /^%q.$/ then ?'
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end
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when :on_regexp_beg then ?/
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when :on_symbeg then ?:
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when :on_backtick then ?`
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when :on_qwords_beg then ?]
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when :on_words_beg then ?]
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when :on_qsymbols_beg then ?]
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when :on_symbols_beg then ?]
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when :on_heredoc_beg
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start_token[2] =~ /<<[-~]?(['"`])[_a-zA-Z0-9]+\1/
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case $1
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when ?" then ?"
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when ?' then ?'
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when ?` then ?`
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else ?"
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end
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else
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nil
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end
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end
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end
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# :startdoc:
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