Removed a useless len field for field lines

2 files changed, 128 insertions, 136 deletions

diff --git a/src/field.nim b/src/field.nim
index 215a0e3..82a8575 100644
--- a/src/field.nim
+++ b/src/field.nim
@@ -1,6 +1,6 @@
 type
   Line = ref object
-    x, l: int
+    x: int
     columns: seq[int]
 
   Field* = object
@@ -12,57 +12,54 @@ func Blank*(f: var Field, x, y: int) =
   if y < f.y or y >= f.y+f.ly: # outside the field
     return
   var l = f.lines[y-f.y]
-  if x < l.x or x >= l.x+l.l: # outside the field
+  if x < l.x or x >= l.x+l.columns.len: # outside the field
     return
-  if x > l.x and x < l.x+l.l-1: # just set the value
+  if x > l.x and x < l.x+l.columns.len-1: # just set the value
     l.columns[x-l.x] = int(' ')
     return
-  if l.l == 1: # this was the last character on the line
+  if l.columns.len == 1: # this was the last character on the line
     if y == f.y: # we need to trim the leading lines
       var i = 1
-      while f.lines[i] == nil or f.lines[i].l == 0:
+      while f.lines[i] == nil or f.lines[i].columns.len == 0:
         inc i
       f.y += i
       f.lines = f.lines[i..<f.ly]
       f.ly -= i
     elif y == f.y+f.ly-1: # we need to trim the trailing lines
       var i = f.ly-2
-      while f.lines[i] == nil or f.lines[i].l == 0:
+      while f.lines[i] == nil or f.lines[i].columns.len == 0:
         dec i
       f.ly = i+1
       f.lines = f.lines[0..<f.ly]
     else: # it was a line in the middle
-      l.l = 0
       l.columns = @[]
   elif x == l.x: # we need to remove leading spaces
     var i = 1
     while l.columns[i] == int(' '):
       inc i
     l.x += i
-    l.columns = l.columns[i..<l.l]
-    l.l -= i
-  elif x == l.l+l.x-1: # we need to remove trailing spaces
-    var i = l.l-2
+    l.columns = l.columns[i..<l.columns.len]
+  elif x == l.columns.len+l.x-1: # we need to remove trailing spaces
+    var i = l.columns.len-2
     while l.columns[i] == int(' '):
       dec i
-    l.l = i+1
-    l.columns = l.columns[0..<l.l]
+    l.columns = l.columns[0..i]
   # we now need to calculate the new field limits
   f.x = f.lines[0].x
-  var x2 = f.lines[0].l + f.lines[0].x
+  var x2 = f.lines[0].columns.len + f.lines[0].x
   for i in 1..<f.ly:
-    if f.lines[i] == nil or f.lines[i].l == 0:
+    if f.lines[i] == nil or f.lines[i].columns.len == 0:
       continue
     if f.x > f.lines[i].x:
       f.x = f.lines[i].x
-    if x2 < f.lines[i].x + f.lines[i].l:
-      x2 = f.lines[i].x + f.lines[i].l
+    if x2 < f.lines[i].x + f.lines[i].columns.len:
+      x2 = f.lines[i].x + f.lines[i].columns.len
   f.lx = x2-f.x
 
 func Get*(f: Field, x, y: int): int =
   if y >= f.y and y < f.y+f.ly:
     let l = f.lines[y-f.y]
-    if x >= l.x and x < l.x+l.l:
+    if x >= l.x and x < l.x+l.columns.len:
       return l.columns[x-l.x]
   return int(' ')
 
@@ -83,12 +80,12 @@ proc Load*(filename: string): ref Field =
     let n = file.readChars(data, 0, 4096)
     if n <= 0:
       if f.ly == 0:
-        if l.l == 0: # we got en empty file!
+        if l.columns.len == 0: # we got en empty file!
           return nil
         f.x = l.x
-      if l.l > 0:
-        if f.lx < l.l+l.x-f.x:
-          f.lx = l.l+l.x-f.x
+      if l.columns.len > 0:
+        if f.lx < l.columns.len+l.x-f.x:
+          f.lx = l.columns.len+l.x-f.x
         f.lines.add(l)
         inc f.ly
       break
@@ -103,14 +100,14 @@ proc Load*(filename: string): ref Field =
         continue
       if data[i] == '\n' or data[i] == '\r':
         if f.ly == 0:
-          if l.l == 0:
+          if l.columns.len == 0:
             return nil
           f.x = l.x
-        if l.l > 0:
+        if l.columns.len > 0:
           if f.x > l.x:
             f.x = l.x
-          if f.lx < l.l+l.x-f.x:
-            f.lx = l.l+l.x-f.x
+          if f.lx < l.columns.len+l.x-f.x:
+            f.lx = l.columns.len+l.x-f.x
         inc f.ly
         f.lines.add(l)
         l = new(Line)
@@ -122,22 +119,20 @@ proc Load*(filename: string): ref Field =
             lastReadIsCR = true
       else:
         if data[i] == ' ':
-          if l.l == 0: # trim leading spaces
+          if l.columns.len == 0: # trim leading spaces
             inc l.x
           else:
             inc trailingSpaces
         else:
           if trailingSpaces > 0:
-            let newL = l.l + trailingSpaces + 1
-            l.columns.setlen(newL)
-            for j in l.l..<newL-1:
+            let oldL = l.columns.len
+            l.columns.setlen(oldL+trailingSpaces+1)
+            for j in oldL..<l.columns.len-1:
               l.columns[j] = int(' ')
-            l.columns[newL-1] = int(data[i])
-            l.l = newL
+            l.columns[^1] = int(data[i])
             trailingSpaces = 0
           else:
             l.columns.add(int(data[i]))
-            inc l.l
       inc i
   return f
 
@@ -147,11 +142,10 @@ func Set*(f: var Field, x, y, v: int) =
   elif y >= f.y:
     if y < f.y+f.ly: # the line exists
       var l = f.lines[y-f.y]
-      if l == nil or l.l == 0: # An empty line is a special case
+      if l == nil or l.columns.len == 0: # An empty line is a special case
         if l == nil:
           new(l)
         l.x = x
-        l.l = 1
         l.columns = @[v]
         f.lines[y-f.y] = l
         if f.x > x:
@@ -160,35 +154,33 @@ func Set*(f: var Field, x, y, v: int) =
         if f.lx < x-f.x+1:
           f.lx = x-f.x+1
       elif x >= l.x:
-        if x < l.x+l.l: # just set the value
+        if x < l.x+l.columns.len: # just set the value
           l.columns[x-l.x] = v
         else: # append columns
-          let newL = x-l.x+1
-          l.columns.setlen(newL)
-          for i in l.l..<newL-1:
+          let oldL = l.columns.len
+          l.columns.setlen(x-l.x+1)
+          for i in oldL..<l.columns.len-1:
             l.columns[i] = int(' ')
-          l.columns[newL-1] = v
-          l.l = newL
-          if f.lx < l.l+l.x-f.x:
-            f.lx = l.l+l.x-f.x
+          l.columns[^1] = v
+          if f.lx < l.columns.len+l.x-f.x:
+            f.lx = l.columns.len+l.x-f.x
       else: # preprend columns
-        let newL = l.l + l.x - x
-        var newline = newSeqUninitialized[int](newL)
+        let oldL = l.columns.len
+        var newline = newSeqUninitialized[int](oldL+l.x-x)
         newline[0] = v
         for i in 1..<l.x-x:
           newline[i] = int(' ')
-        for i in l.x-x..<newL:
+        for i in l.x-x..<newline.len:
           newline[i] = l.columns[i-l.x+x]
         l.columns = newline
         l.x = x
-        l.l = newL
         if f.x > x:
           f.lx = f.lx + f.x - x
           f.x = x
     else: # append lines
       f.ly = y-f.y+1
       f.lines.setlen(f.ly)
-      f.lines[f.ly-1] = Line(x: x, l: 1, columns: @[v])
+      f.lines[f.ly-1] = Line(x: x, columns: @[v])
       if f.x > x:
         f.lx = f.lx + f.x - x
         f.x = x
@@ -197,7 +189,7 @@ func Set*(f: var Field, x, y, v: int) =
   else: # prepend lines
     let newLy = f.ly+f.y-y
     var newlines = newSeq[Line](newLy)
-    newlines[0] = Line(x: x, l: 1, columns: @[v])
+    newlines[0] = Line(x: x, columns: @[v])
     for i in f.y-y..<newLy:
       newlines[i] = f.lines[i-f.y+y]
     f.lines = newlines
diff --git a/tests/field.nim b/tests/field.nim
index 6196d97..deea574 100644
--- a/tests/field.nim
+++ b/tests/field.nim
@@ -9,7 +9,7 @@ func `==`(a, b: Field): bool =
         continue
       if a.lines[i] == nil xor b.lines[i] == nil:
         return false
-      if a.lines[i].x != b.lines[i].x or a.lines[i].l != b.lines[i].l or a.lines[i].columns != b.lines[i].columns:
+      if a.lines[i].x != b.lines[i].x or a.lines[i].columns != b.lines[i].columns:
         return false
     return true
   return false
@@ -19,92 +19,92 @@ func cols(a: openarray[char]): seq[int] =
   for i in 0..<a.len:
     result[i] = a[i].int()
 
-let minimal = Field(x: 0, y: 0, lx: 1, ly: 1, lines: @[Line(x: 0, l: 1, columns: @[int('@')])])
+let minimal = Field(x: 0, y: 0, lx: 1, ly: 1, lines: @[Line(x: 0, columns: @[int('@')])])
 
 suite "Field":
   test "Blank":
     var f = Field(x: -7, y: -5, lx: 17, ly: 10, lines: @[
-      Line(x: -5, l: 1, columns: @[int('x')]),
+      Line(x: -5, columns: @[int('x')]),
       nil,
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 1, columns: @[int('e')]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[int('e')]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), int('z'), 32, 32, int('r')]),
-      Line(x: -3, l: 1, columns: @[int('f')]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), int('z'), 32, 32, int('r')]),
+      Line(x: -3, columns: @[int('f')]),
+      Line(x: 5, columns: @[int('d')]),
       nil,
-      Line(x: -7, l: 1, columns: @[int('y')]),
+      Line(x: -7, columns: @[int('y')]),
     ])
     let moinsz = Field(x: -7, y: -5, lx: 17, ly: 10, lines: @[
-      Line(x: -5, l: 1, columns: @[int('x')]),
+      Line(x: -5, columns: @[int('x')]),
       nil,
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 1, columns: @[int('e')]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[int('e')]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
-      Line(x: -3, l: 1, columns: @[int('f')]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -3, columns: @[int('f')]),
+      Line(x: 5, columns: @[int('d')]),
       nil,
-      Line(x: -7, l: 1, columns: @[int('y')]),
+      Line(x: -7, columns: @[int('y')]),
     ])
     f.Blank(1, 0)
     check f == moinsz
     let moinsy = Field(x: -5, y: -5, lx: 15, ly: 8, lines: @[
-      Line(x: -5, l: 1, columns: @[int('x')]),
+      Line(x: -5, columns: @[int('x')]),
       nil,
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 1, columns: @[int('e')]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[int('e')]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
-      Line(x: -3, l: 1, columns: @[int('f')]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -3, columns: @[int('f')]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Blank(-7, 4)
     check f == moinsy
     let moinsx = Field(x: -3, y: -3, lx: 13, ly: 6, lines: @[
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 1, columns: @[int('e')]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[int('e')]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
-      Line(x: -3, l: 1, columns: @[int('f')]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -3, columns: @[int('f')]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Blank(-5, -5)
     check f == moinsx
     let moinsf = Field(x: -2, y: -3, lx: 12, ly: 6, lines: @[
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 1, columns: @[int('e')]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[int('e')]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
-      Line(x: -3, l: 0, columns: @[]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -3, columns: @[]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Blank(-3, 1)
     check f == moinsf
     let moinse = Field(x: -2, y: -3, lx: 11, ly: 6, lines: @[
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 0, columns: @[]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
-      Line(x: -3, l: 0, columns: @[]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -3, columns: @[]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Blank(9, -2)
     check f == moinse
     let moinsu = Field(x: -2, y: 0, lx: 8, ly: 3, lines: @[
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
-      Line(x: -3, l: 0, columns: @[]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -3, columns: @[]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Blank(8, -3)
     check f == moinsu
-    let moinsd = Field(x: -2, y: 0, lx: 7, ly: 1, lines: @[Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')])])
+    let moinsd = Field(x: -2, y: 0, lx: 7, ly: 1, lines: @[Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')])])
     f.Blank(5, 2)
     check f == moinsd
-    let moinsl = Field(x: 0, y: 0, lx: 5, ly: 1, lines: @[Line(x: 0, l: 5, columns: @[int('@'), 32, 32, 32, int('r')])])
+    let moinsl = Field(x: 0, y: 0, lx: 5, ly: 1, lines: @[Line(x: 0, columns: @[int('@'), 32, 32, 32, int('r')])])
     f.Blank(-2, 0)
     check f == moinsl
-    let moinsr = Field(x: 0, y: 0, lx: 1, ly: 1, lines: @[Line(x: 0, l: 1, columns: @[int('@')])])
+    let moinsr = Field(x: 0, y: 0, lx: 1, ly: 1, lines: @[Line(x: 0, columns: @[int('@')])])
     f.Blank(4, 0)
     check f == moinsr
   test "Get":
@@ -117,101 +117,101 @@ suite "Field":
     check Load("nonexistant") == nil
     check Load("examples/invalid.b98") == nil
     check Load("examples/empty.b98") == nil
-    check Load("examples/minimal.b98")[] == Field(lx: 1, ly: 1, lines: @[Line(l: 1, columns: @['@'].cols)])
-    let hello = Field(lx: 24, ly: 1, lines: @[Line(l: 24, columns: @['6', '4', '+', '"', '!', 'd', 'l', 'r', 'o', 'W', ' ', ',', 'o', 'l', 'l', 'e', 'H', '"', '>', ':', '#', ',', '_', '@'].cols)])
+    check Load("examples/minimal.b98")[] == Field(lx: 1, ly: 1, lines: @[Line(columns: @['@'].cols)])
+    let hello = Field(lx: 24, ly: 1, lines: @[Line(columns: @['6', '4', '+', '"', '!', 'd', 'l', 'r', 'o', 'W', ' ', ',', 'o', 'l', 'l', 'e', 'H', '"', '>', ':', '#', ',', '_', '@'].cols)])
     check Load("examples/hello.b98")[] == hello
     check Load("examples/rn.b98")[] == hello
     check Load("examples/hello2.b98")[] == Field(x: 1, lx: 33, ly: 2, lines: @[
-      Line(x: 33, l: 1, columns: @['v'].cols),
-      Line(x: 1, l: 33, columns: @['@', ' ', '>', ' ', '#', ';', '>', ':', '#', ',', '_', 'e', '-', 'j', ';', ' ', '"', 'H', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', '!',
+      Line(x: 33, columns: @['v'].cols),
+      Line(x: 1, columns: @['@', ' ', '>', ' ', '#', ';', '>', ':', '#', ',', '_', 'e', '-', 'j', ';', ' ', '"', 'H', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', '!',
           '"', 'd', 'a', '<'].cols)
     ])
     check Load("examples/factorial.b98")[] == Field(x: 0, lx: 15, ly: 2, lines: @[
-      Line(x: 0, l: 15, columns: @['&', '>', ':', '1', '-', ':', 'v', ' ', 'v', ' ', '*', '_', '$', '.', '@'].cols),
-      Line(x: 1, l: 11, columns: @['^', ' ', ' ', ' ', ' ', '_', '$', '>', '\\', ':', '^'].cols)
+      Line(x: 0, columns: @['&', '>', ':', '1', '-', ':', 'v', ' ', 'v', ' ', '*', '_', '$', '.', '@'].cols),
+      Line(x: 1, columns: @['^', ' ', ' ', ' ', ' ', '_', '$', '>', '\\', ':', '^'].cols)
     ])
     check Load("examples/dna.b98")[] == Field(x: 0, lx: 7, ly: 8, lines: @[
-      Line(x: 0, l: 7, columns: @['7', '^', 'D', 'N', '>', 'v', 'A'].cols),
-      Line(x: 0, l: 7, columns: @['v', '_', '#', 'v', '?', ' ', 'v'].cols),
-      Line(x: 0, l: 7, columns: @['7', '^', '<', '"', '"', '"', '"'].cols),
-      Line(x: 0, l: 7, columns: @['3', ' ', ' ', 'A', 'C', 'G', 'T'].cols),
-      Line(x: 0, l: 7, columns: @['9', '0', '!', '"', '"', '"', '"'].cols),
-      Line(x: 0, l: 7, columns: @['4', '*', ':', '>', '>', '>', 'v'].cols),
-      Line(x: 0, l: 7, columns: @['+', '8', '^', '-', '1', ',', '<'].cols),
-      Line(x: 0, l: 7, columns: @['>', ' ', ',', '+', ',', '@', ')'].cols),
+      Line(x: 0, columns: @['7', '^', 'D', 'N', '>', 'v', 'A'].cols),
+      Line(x: 0, columns: @['v', '_', '#', 'v', '?', ' ', 'v'].cols),
+      Line(x: 0, columns: @['7', '^', '<', '"', '"', '"', '"'].cols),
+      Line(x: 0, columns: @['3', ' ', ' ', 'A', 'C', 'G', 'T'].cols),
+      Line(x: 0, columns: @['9', '0', '!', '"', '"', '"', '"'].cols),
+      Line(x: 0, columns: @['4', '*', ':', '>', '>', '>', 'v'].cols),
+      Line(x: 0, columns: @['+', '8', '^', '-', '1', ',', '<'].cols),
+      Line(x: 0, columns: @['>', ' ', ',', '+', ',', '@', ')'].cols),
     ])
   test "Set":
-    var f = Field(x: 0, y: 0, lx: 1, ly: 1, lines: @[Line(x: 0, l: 1, columns: @['>'].cols)])
+    var f = Field(x: 0, y: 0, lx: 1, ly: 1, lines: @[Line(x: 0, columns: @['>'].cols)])
     f.Set(0, 0, int('@'))
     check f == minimal
     f.Set(1, 0, int(' '))
     check f == minimal
-    let xappend = Field(x: 0, y: 0, lx: 5, ly: 1, lines: @[Line(x: 0, l: 5, columns: @[int('@'), 32, 32, 32, int('r')])])
+    let xappend = Field(x: 0, y: 0, lx: 5, ly: 1, lines: @[Line(x: 0, columns: @[int('@'), 32, 32, 32, int('r')])])
     f.Set(4, 0, int('r'))
     check f == xappend
-    let xprepend = Field(x: -2, y: 0, lx: 7, ly: 1, lines: @[Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')])])
+    let xprepend = Field(x: -2, y: 0, lx: 7, ly: 1, lines: @[Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')])])
     f.Set(-2, 0, int('l'))
     check f == xprepend
     let yappend = Field(x: -2, y: 0, lx: 8, ly: 3, lines: @[
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
       nil,
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Set(5, 2, int('d'))
     check f == yappend
     let yprepend = Field(x: -2, y: -3, lx: 11, ly: 6, lines: @[
-      Line(x: 8, l: 1, columns: @[int('u')]),
+      Line(x: 8, columns: @[int('u')]),
       nil,
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
       nil,
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Set(8, -3, int('u'))
     check f == yprepend
     let xappendEmptyline = Field(x: -2, y: -3, lx: 12, ly: 6, lines: @[
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 1, columns: @[int('e')]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[int('e')]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
       nil,
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Set(9, -2, int('e'))
     check f == xappendEmptyline
     let xprependEmptyline = Field(x: -3, y: -3, lx: 13, ly: 6, lines: @[
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 1, columns: @[int('e')]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[int('e')]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
-      Line(x: -3, l: 1, columns: @[int('f')]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -3, columns: @[int('f')]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Set(-3, 1, int('f'))
     check f == xprependEmptyline
     let xprependyprepend = Field(x: -5, y: -5, lx: 15, ly: 8, lines: @[
-      Line(x: -5, l: 1, columns: @[int('x')]),
+      Line(x: -5, columns: @[int('x')]),
       nil,
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 1, columns: @[int('e')]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[int('e')]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
-      Line(x: -3, l: 1, columns: @[int('f')]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -3, columns: @[int('f')]),
+      Line(x: 5, columns: @[int('d')]),
     ])
     f.Set(-5, -5, int('x'))
     check f == xprependyprepend
     let xprependyappend = Field(x: -7, y: -5, lx: 17, ly: 10, lines: @[
-      Line(x: -5, l: 1, columns: @[int('x')]),
+      Line(x: -5, columns: @[int('x')]),
       nil,
-      Line(x: 8, l: 1, columns: @[int('u')]),
-      Line(x: 9, l: 1, columns: @[int('e')]),
+      Line(x: 8, columns: @[int('u')]),
+      Line(x: 9, columns: @[int('e')]),
       nil,
-      Line(x: -2, l: 7, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
-      Line(x: -3, l: 1, columns: @[int('f')]),
-      Line(x: 5, l: 1, columns: @[int('d')]),
+      Line(x: -2, columns: @[int('l'), 32, int('@'), 32, 32, 32, int('r')]),
+      Line(x: -3, columns: @[int('f')]),
+      Line(x: 5, columns: @[int('d')]),
       nil,
-      Line(x: -7, l: 1, columns: @[int('y')]),
+      Line(x: -7, columns: @[int('y')]),
     ])
     f.Set(-7, 4, int('y'))
     check f == xprependyappend