# See the License for the specific language governing permissions and
# limitations under the License.
-# This module is used to model Nit source-file and locations in source-file
+# Nit source-file and locations in source-file
module location
# A raw text Nit source file
var string: String is noinit
# The original stream used to initialize `string`
- var stream: IStream
+ var stream: Reader
init
do
super Comparable
redef type OTHER: Location
+ # The associated source-file
var file: nullable SourceFile
+
+ # The starting line number (starting from 1)
+ #
+ # If `line_start==0` then the whole file is considered
var line_start: Int
+
+ # The stopping line number (starting from 1)
var line_end: Int
+
+ # Start of this location on `line_start`
+ #
+ # A `column_start` of 1 means the first column or character.
+ #
+ # If `column_start == 0` this location concerns the whole line.
+ #
+ # Require: `column_start >= 0`
var column_start: Int
+
+ # End of this location on `line_end`
var column_end: Int
+ # Builds a location instance from its string representation.
+ #
+ # Examples:
+ #
+ # ~~~
+ # var loc = new Location.from_string("location.nit:82,2--105,8")
+ # assert loc.to_s == "location.nit:82,2--105,8"
+ #
+ # loc = new Location.from_string("location.nit")
+ # assert loc.to_s == "location.nit"
+ #
+ # loc = new Location.from_string("location.nit:82,2")
+ # assert loc.to_s == "location.nit:82,2--0,0"
+ #
+ # loc = new Location.from_string("location.nit:82--105")
+ # assert loc.to_s == "location.nit:82,0--105,0"
+ #
+ # loc = new Location.from_string("location.nit:82,2--105")
+ # assert loc.to_s == "location.nit:82,2--105,0"
+ #
+ # loc = new Location.from_string("location.nit:82--105,8")
+ # assert loc.to_s == "location.nit:82,0--105,8"
+ # ~~~
+ init from_string(string: String) do
+ self.line_start = 0
+ self.line_end = 0
+ self.column_start = 0
+ self.column_end = 0
+ # parses the location string and init position vars
+ var parts = string.split_with(":")
+ var filename = parts.shift
+ self.file = new SourceFile(filename, new FileReader.open(filename))
+ # split position
+ if parts.is_empty then return
+ var pos = parts.first.split_with("--")
+ # split start position
+ if pos.first.has(",") then
+ var pos1 = pos.first.split_with(",")
+ self.line_start = pos1[0].to_i
+ if pos1.length > 1 then
+ self.column_start = pos1[1].to_i
+ end
+ else
+ self.line_start = pos.first.to_i
+ end
+ # split end position
+ if pos.length <= 1 then return
+ if pos[1].has(",") then
+ var pos2 = pos[1].split_with(",")
+ if pos2.length > 1 then
+ self.line_end = pos2[0].to_i
+ self.column_end = pos2[1].to_i
+ else
+ self.line_end = self.line_start
+ self.column_end = pos2[0].to_i
+ end
+ else
+ self.line_end = pos[1].to_i
+ end
+ end
+
# The index in the start character in the source
fun pstart: Int do return file.line_starts[line_start-1] + column_start-1
private var text_cache: nullable String = null
- init with_file(f: SourceFile) do init(f,0,0,0,0)
-
redef fun ==(other: nullable Object): Bool do
if other == null then return false
if not other isa Location then return false
var file_part = ""
if file != null then
file_part = file.filename
- if file.filename.length > 0 then file_part += ":"
end
+ if line_start <= 0 then return file_part
+
+ if file != null and file.filename.length > 0 then file_part += ":"
+
if line_start == line_end then
if column_start == column_end then
return "{file_part}{line_start},{column_start}"
var l = self
var i = l.line_start
+ if i <= 0 then return ""
+
var line_start = l.file.line_starts[i-1]
var line_end = line_start
var string = l.file.string
while line_end+1 < string.length and string.chars[line_end+1] != '\n' and string.chars[line_end+1] != '\r' do
line_end += 1
end
- var lstart = string.substring(line_start, l.column_start - 1)
+ var lstart
+ if l.column_start > 0 then
+ lstart = string.substring(line_start, l.column_start - 1)
+ else
+ lstart = ""
+ end
var cend
if i != l.line_end then
cend = line_end - line_start + 1
nitlanguage / nit.git / blobdiff