class SyntaxSuggest::Capture::BeforeAfterKeywordEnds

显示周围的 kw/end 对

显示这些额外对的目的是为了处理当只匹配到一行可见行时的歧义情况。

例如

1  class Dog
2    def bark
4    def eat
5    end
6  end

在这种情况下，第二行可能缺少一个 ‘end`，或者第四行是错误添加的多余行（这种情况时有发生）。

当我们检测到上述问题时，它会显示问题仅出现在第二行

2    def bark

显示“相邻”关键字对可提供额外上下文

2    def bark
4    def eat
5    end

示例

lines = BeforeAfterKeywordEnds.new(
  block: block,
  code_lines: code_lines
).call()

Public Class Methods

new (code_lines:, block:)

Source

# File lib/syntax_suggest/capture/before_after_keyword_ends.rb, line 41
def initialize(code_lines:, block:)
  @scanner = ScanHistory.new(code_lines: code_lines, block: block)
  @original_indent = block.current_indent
end

Public Instance Methods

call ()

Source

# File lib/syntax_suggest/capture/before_after_keyword_ends.rb, line 46
def call
  lines = []

  @scanner.scan(
    up: ->(line, kw_count, end_count) {
      next true if line.empty?
      break if line.indent < @original_indent
      next true if line.indent != @original_indent

      # If we're going up and have one complete kw/end pair, stop
      if kw_count != 0 && kw_count == end_count
        lines << line
        break
      end

      lines << line if line.is_kw? || line.is_end?
      true
    },
    down: ->(line, kw_count, end_count) {
      next true if line.empty?
      break if line.indent < @original_indent
      next true if line.indent != @original_indent

      # if we're going down and have one complete kw/end pair,stop
      if kw_count != 0 && kw_count == end_count
        lines << line
        break
      end

      lines << line if line.is_kw? || line.is_end?
      true
    }
  )
  @scanner.stash_changes

  lines
end