Module: RuVim::Lang::Rust

Defined in:
lib/ruvim/lang/rust.rb

Constant Summary collapse

KEYWORDS = 
%w[
  as async await break const continue crate dyn else enum extern
  false fn for if impl in let loop match mod move mut pub ref
  return self Self static struct super trait true type unsafe use
  where while
  macro_rules
].freeze
TYPES = 
%w[
  bool char str
  i8 i16 i32 i64 i128 isize
  u8 u16 u32 u64 u128 usize
  f32 f64
  String Vec Box Rc Arc Option Result HashMap HashSet
  Vec! vec!
].freeze
ALL_KEYWORDS = 
(KEYWORDS + TYPES).uniq.freeze
KEYWORD_RE = 
/\b(?:#{ALL_KEYWORDS.map { |k| Regexp.escape(k) }.join("|")})\b/
STRING_DOUBLE_RE = 
/"(?:\\.|[^"\\])*"/
STRING_RAW_RE = 
/r#*"[^"]*"#*/
CHAR_RE = 
/'(?:\\.|[^'\\])'/
LIFETIME_RE = 
/'[a-z_]\w*/
NUMBER_RE = 
/\b(?:0[xXoObB][\da-fA-F_]+|\d[\d_]*(?:\.[\d_]+)?(?:[eE][+-]?\d+)?(?:_?[iu](?:8|16|32|64|128|size)|_?f(?:32|64))?)\b/
LINE_COMMENT_RE = 
%r{//.*}
BLOCK_COMMENT_RE = 
%r{/\*.*?\*/}
ATTRIBUTE_RE = 
/#!?\[[\w:(,)\s"]*\]/
MACRO_RE = 
/\b\w+!/
CONSTANT_RE = 
/\b[A-Z][A-Z0-9_]{1,}\b/
INDENT_OPEN_RE = 
/[{(\[]\s*(?:\/\/.*)?$/
INDENT_CLOSE_RE = 
/\A\s*[}\])]/
DEDENT_TRIGGERS = 
{
  "}" => /\A(\s*)\}/,
  "]" => /\A(\s*)\]/,
  ")" => /\A(\s*)\)/
}.freeze

Class Method Summary collapse

Class Method Details

.calculate_indent(lines, target_row, shiftwidth) ⇒ Object 



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# File 'lib/ruvim/lang/rust.rb', line 48

def calculate_indent(lines, target_row, shiftwidth)
  depth = 0
  (0...target_row).each do |row|
    line = lines[row].to_s
    line.each_char do |ch|
      case ch
      when "{", "[", "(" then depth += 1
      when "}", "]", ")" then depth -= 1
      end
    end
  end

  target_line = lines[target_row].to_s.lstrip
  depth -= 1 if target_line.match?(INDENT_CLOSE_RE)
  depth = 0 if depth < 0
  depth * shiftwidth
end

.color_columns(text) ⇒ Object 



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# File 'lib/ruvim/lang/rust.rb', line 74

def color_columns(text)
  cols = {}
  Highlighter.apply_regex(cols, text, CHAR_RE, Highlighter::STRING_COLOR)
  Highlighter.apply_regex(cols, text, STRING_DOUBLE_RE, Highlighter::STRING_COLOR)
  Highlighter.apply_regex(cols, text, STRING_RAW_RE, Highlighter::STRING_COLOR)
  Highlighter.apply_regex(cols, text, LIFETIME_RE, "\e[35m")
  Highlighter.apply_regex(cols, text, KEYWORD_RE, Highlighter::KEYWORD_COLOR)
  Highlighter.apply_regex(cols, text, MACRO_RE, "\e[35m")
  Highlighter.apply_regex(cols, text, NUMBER_RE, Highlighter::NUMBER_COLOR)
  Highlighter.apply_regex(cols, text, CONSTANT_RE, Highlighter::CONSTANT_COLOR)
  Highlighter.apply_regex(cols, text, ATTRIBUTE_RE, "\e[35m")
  Highlighter.apply_regex(cols, text, BLOCK_COMMENT_RE, Highlighter::COMMENT_COLOR, override: true)
  Highlighter.apply_regex(cols, text, LINE_COMMENT_RE, Highlighter::COMMENT_COLOR, override: true)
  cols
end

.dedent_trigger(char) ⇒ Object 



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# File 'lib/ruvim/lang/rust.rb', line 70

def dedent_trigger(char)
  DEDENT_TRIGGERS[char]
end

.indent_trigger?(line) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ruvim/lang/rust.rb', line 66

def indent_trigger?(line)
  line.to_s.rstrip.match?(INDENT_OPEN_RE)
end