This represents a location in the source.
A Source object that is used to determine more information from the given offset and length.
The byte offset from the beginning of the source where this location starts.
The length of this location in bytes.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 180
def initialize(source, start_offset, length)
@source = source
@start_offset = start_offset
@length = length
# These are used to store comments that are associated with this location.
# They are initialized to `nil` to save on memory when there are no
# comments to be attached and/or the comment-related APIs are not used.
@leading_comments = nil
@trailing_comments = nil
end
Create a new location object with the given source, start byte offset, and byte length.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 344
def ==(other)
Location === other &&
other.start_offset == start_offset &&
other.end_offset == end_offset
end
Returns true if the given other location is equal to this location.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 363
def adjoin(string)
line_suffix = source.slice(end_offset, source.line_end(end_offset) - end_offset)
line_suffix_index = line_suffix.byteindex(string)
raise "Could not find #{string}" if line_suffix_index.nil?
Location.new(source, start_offset, length + line_suffix_index + string.bytesize)
end
Join this location with the first occurrence of the string in the source that occurs after this location on the same line, and return the new location. This will raise an error if the string does not exist.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 226
def chop
copy(length: length == 0 ? length : length - 1)
end
Returns a new location that is the result of chopping off the last byte.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 216
def comments
[*@leading_comments, *@trailing_comments]
end
Returns all comments that are associated with this location (both leading and trailing comments).
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 221
def copy(source: self.source, start_offset: self.start_offset, length: self.length)
Location.new(source, start_offset, length)
end
Create a new location object with the given options.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 334
def deconstruct_keys(keys)
{ start_offset: start_offset, end_offset: end_offset }
end
Implement the hash pattern matching interface for Location.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 323
def end_character_column
source.character_column(end_offset)
end
The column number in characters where this location ends from the start of the line.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 272
def end_character_offset
source.character_offset(end_offset)
end
The character offset from the beginning of the source where this location ends.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 329
def end_code_units_column(encoding = Encoding::UTF_16LE)
source.code_units_column(end_offset, encoding)
end
The column number in code units of the given encoding where this location ends from the start of the line.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 277
def end_code_units_offset(encoding = Encoding::UTF_16LE)
source.code_units_offset(end_offset, encoding)
end
The offset from the start of the file in code units of the given encoding.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 317
def end_column
source.column(end_offset)
end
The column number in bytes where this location ends from the start of the line.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 293
def end_line
source.line(end_offset)
end
The line number where this location ends.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 266
def end_offset
start_offset + length
end
The byte offset from the beginning of the source where this location ends.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 231
def inspect
"#<Prism::Location @start_offset=#{@start_offset} @length=#{@length} start_line=#{start_line}>"
end
Returns a string representation of this location.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 353
def join(other)
raise "Incompatible sources" if source != other.source
raise "Incompatible locations" if start_offset > other.start_offset
Location.new(source, start_offset, other.end_offset - start_offset)
end
Returns a new location that stretches from this location to the given other location. Raises an error if this location is not before the other location or if they don’t share the same source.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 199
def leading_comment(comment)
leading_comments << comment
end
Attach a comment to the leading comments of this location.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 194
def leading_comments
@leading_comments ||= []
end
These are the comments that are associated with this location that exist before the start of this location.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 339
def pretty_print(q)
q.text("(#{start_line},#{start_column})-(#{end_line},#{end_column})")
end
Implement the pretty print interface for Location.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 241
def slice
source.slice(start_offset, length)
end
The source code that this location represents.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 248
def slice_lines
line_start = source.line_start(start_offset)
line_end = source.line_end(end_offset)
source.slice(line_start, line_end - line_start)
end
The source code that this location represents starting from the beginning of the line that this location starts on to the end of the line that this location ends on.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 236
def source_lines
source.lines
end
Returns all of the lines of the source code associated with this location.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 305
def start_character_column
source.character_column(start_offset)
end
The column number in characters where this location ends from the start of the line.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 256
def start_character_offset
source.character_offset(start_offset)
end
The character offset from the beginning of the source where this location starts.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 311
def start_code_units_column(encoding = Encoding::UTF_16LE)
source.code_units_column(start_offset, encoding)
end
The column number in code units of the given encoding where this location starts from the start of the line.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 261
def start_code_units_offset(encoding = Encoding::UTF_16LE)
source.code_units_offset(start_offset, encoding)
end
The offset from the start of the file in code units of the given encoding.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 299
def start_column
source.column(start_offset)
end
The column number in bytes where this location starts from the start of the line.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 282
def start_line
source.line(start_offset)
end
The line number where this location starts.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 287
def start_line_slice
offset = source.line_start(start_offset)
source.slice(offset, start_offset - offset)
end
The content of the line where this location starts before this location.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 210
def trailing_comment(comment)
trailing_comments << comment
end
Attach a comment to the trailing comments of this location.
# File tmp/rubies/ruby-master/lib/prism/parse_result.rb, line 205
def trailing_comments
@trailing_comments ||= []
end
These are the comments that are associated with this location that exist after the end of this location.