whoami7 - Manager
:
/
opt
/
alt
/
ruby32
/
share
/
ruby
/
syntax_suggest
/
Upload File:
files >> //opt/alt/ruby32/share/ruby/syntax_suggest/left_right_lex_count.rb
# frozen_string_literal: true module SyntaxSuggest # Find mis-matched syntax based on lexical count # # Used for detecting missing pairs of elements # each keyword needs an end, each '{' needs a '}' # etc. # # Example: # # left_right = LeftRightLexCount.new # left_right.count_kw # left_right.missing.first # # => "end" # # left_right = LeftRightLexCount.new # source = "{ a: b, c: d" # Note missing '}' # LexAll.new(source: source).each do |lex| # left_right.count_lex(lex) # end # left_right.missing.first # # => "}" class LeftRightLexCount def initialize @kw_count = 0 @end_count = 0 @count_for_char = { "{" => 0, "}" => 0, "[" => 0, "]" => 0, "(" => 0, ")" => 0, "|" => 0 } end def count_kw @kw_count += 1 end def count_end @end_count += 1 end # Count source code characters # # Example: # # left_right = LeftRightLexCount.new # left_right.count_lex(LexValue.new(1, :on_lbrace, "{", Ripper::EXPR_BEG)) # left_right.count_for_char("{") # # => 1 # left_right.count_for_char("}") # # => 0 def count_lex(lex) case lex.type when :on_tstring_content # ^^^ # Means it's a string or a symbol `"{"` rather than being # part of a data structure (like a hash) `{ a: b }` # ignore it. when :on_words_beg, :on_symbos_beg, :on_qwords_beg, :on_qsymbols_beg, :on_regexp_beg, :on_tstring_beg # ^^^ # Handle shorthand syntaxes like `%Q{ i am a string }` # # The start token will be the full thing `%Q{` but we # need to count it as if it's a `{`. Any token # can be used char = lex.token[-1] @count_for_char[char] += 1 if @count_for_char.key?(char) when :on_embexpr_beg # ^^^ # Embedded string expressions like `"#{foo} <-embed"` # are parsed with chars: # # `#{` as :on_embexpr_beg # `}` as :on_embexpr_end # # We cannot ignore both :on_emb_expr_beg and :on_embexpr_end # because sometimes the lexer thinks something is an embed # string end, when it is not like `lol = }` (no clue why). # # When we see `#{` count it as a `{` or we will # have a mis-match count. # case lex.token when "\#{" @count_for_char["{"] += 1 end else @end_count += 1 if lex.is_end? @kw_count += 1 if lex.is_kw? @count_for_char[lex.token] += 1 if @count_for_char.key?(lex.token) end end def count_for_char(char) @count_for_char[char] end # Returns an array of missing syntax characters # or `"end"` or `"keyword"` # # left_right.missing # # => ["}"] def missing out = missing_pairs out << missing_pipe out << missing_keyword_end out.compact! out end PAIRS = { "{" => "}", "[" => "]", "(" => ")" }.freeze # Opening characters like `{` need closing characters # like `}`. # # When a mis-match count is detected, suggest the # missing member. # # For example if there are 3 `}` and only two `{` # return `"{"` private def missing_pairs PAIRS.map do |(left, right)| case @count_for_char[left] <=> @count_for_char[right] when 1 right when 0 nil when -1 left end end end # Keywords need ends and ends need keywords # # If we have more keywords, there's a missing `end` # if we have more `end`-s, there's a missing keyword private def missing_keyword_end case @kw_count <=> @end_count when 1 "end" when 0 nil when -1 "keyword" end end # Pipes come in pairs. # If there's an odd number of pipes then we # are missing one private def missing_pipe if @count_for_char["|"].odd? "|" end end end end
Copyright ©2021 || Defacer Indonesia