Added manual and tests for version 5.4-w2

1 files changed, 302 insertions, 0 deletions

diff --git a/testes/constructs.lua b/testes/constructs.lua
new file mode 100644
index 00000000..7796c46f
--- /dev/null
+++ b/testes/constructs.lua
@@ -0,0 +1,302 @@
+-- $Id: constructs.lua,v 1.43 2018/02/21 17:41:07 roberto Exp $
+-- See Copyright Notice in file all.lua
+
+;;print "testing syntax";;
+
+local debug = require "debug"
+
+
+local function checkload (s, msg)
+  assert(string.find(select(2, load(s)), msg))
+end
+
+-- testing semicollons
+do ;;; end
+; do ; a = 3; assert(a == 3) end;
+;
+
+
+-- invalid operations should not raise errors when not executed
+if false then a = 3 // 0; a = 0 % 0 end
+
+
+-- testing priorities
+
+assert(2^3^2 == 2^(3^2));
+assert(2^3*4 == (2^3)*4);
+assert(2.0^-2 == 1/4 and -2^- -2 == - - -4);
+assert(not nil and 2 and not(2>3 or 3<2));
+assert(-3-1-5 == 0+0-9);
+assert(-2^2 == -4 and (-2)^2 == 4 and 2*2-3-1 == 0);
+assert(-3%5 == 2 and -3+5 == 2)
+assert(2*1+3/3 == 3 and 1+2 .. 3*1 == "33");
+assert(not(2+1 > 3*1) and "a".."b" > "a");
+
+assert(0xF0 | 0xCC ~ 0xAA & 0xFD == 0xF4)
+assert(0xFD & 0xAA ~ 0xCC | 0xF0 == 0xF4)
+assert(0xF0 & 0x0F + 1 == 0x10)
+
+assert(3^4//2^3//5 == 2)
+
+assert(-3+4*5//2^3^2//9+4%10/3 == (-3)+(((4*5)//(2^(3^2)))//9)+((4%10)/3))
+
+assert(not ((true or false) and nil))
+assert(      true or false  and nil)
+
+-- old bug
+assert((((1 or false) and true) or false) == true)
+assert((((nil and true) or false) and true) == false)
+
+local a,b = 1,nil;
+assert(-(1 or 2) == -1 and (1 and 2)+(-1.25 or -4) == 0.75);
+x = ((b or a)+1 == 2 and (10 or a)+1 == 11); assert(x);
+x = (((2<3) or 1) == true and (2<3 and 4) == 4); assert(x);
+
+x,y=1,2;
+assert((x>y) and x or y == 2);
+x,y=2,1;
+assert((x>y) and x or y == 2);
+
+assert(1234567890 == tonumber('1234567890') and 1234567890+1 == 1234567891)
+
+
+-- silly loops
+repeat until 1; repeat until true;
+while false do end; while nil do end;
+
+do  -- test old bug (first name could not be an `upvalue')
+ local a; function f(x) x={a=1}; x={x=1}; x={G=1} end
+end
+
+function f (i)
+  if type(i) ~= 'number' then return i,'jojo'; end;
+  if i > 0 then return i, f(i-1); end;
+end
+
+x = {f(3), f(5), f(10);};
+assert(x[1] == 3 and x[2] == 5 and x[3] == 10 and x[4] == 9 and x[12] == 1);
+assert(x[nil] == nil)
+x = {f'alo', f'xixi', nil};
+assert(x[1] == 'alo' and x[2] == 'xixi' and x[3] == nil);
+x = {f'alo'..'xixi'};
+assert(x[1] == 'aloxixi')
+x = {f{}}
+assert(x[2] == 'jojo' and type(x[1]) == 'table')
+
+
+local f = function (i)
+  if i < 10 then return 'a';
+  elseif i < 20 then return 'b';
+  elseif i < 30 then return 'c';
+  end;
+end
+
+assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == nil)
+
+for i=1,1000 do break; end;
+n=100;
+i=3;
+t = {};
+a=nil
+while not a do
+  a=0; for i=1,n do for i=i,1,-1 do a=a+1; t[i]=1; end; end;
+end
+assert(a == n*(n+1)/2 and i==3);
+assert(t[1] and t[n] and not t[0] and not t[n+1])
+
+function f(b)
+  local x = 1;
+  repeat
+    local a;
+    if b==1 then local b=1; x=10; break
+    elseif b==2 then x=20; break;
+    elseif b==3 then x=30;
+    else local a,b,c,d=math.sin(1); x=x+1;
+    end
+  until x>=12;
+  return x;
+end;
+
+assert(f(1) == 10 and f(2) == 20 and f(3) == 30 and f(4)==12)
+
+
+local f = function (i)
+  if i < 10 then return 'a'
+  elseif i < 20 then return 'b'
+  elseif i < 30 then return 'c'
+  else return 8
+  end
+end
+
+assert(f(3) == 'a' and f(12) == 'b' and f(26) == 'c' and f(100) == 8)
+
+local a, b = nil, 23
+x = {f(100)*2+3 or a, a or b+2}
+assert(x[1] == 19 and x[2] == 25)
+x = {f=2+3 or a, a = b+2}
+assert(x.f == 5 and x.a == 25)
+
+a={y=1}
+x = {a.y}
+assert(x[1] == 1)
+
+function f(i)
+  while 1 do
+    if i>0 then i=i-1;
+    else return; end;
+  end;
+end;
+
+function g(i)
+  while 1 do
+    if i>0 then i=i-1
+    else return end
+  end
+end
+
+f(10); g(10);
+
+do
+  function f () return 1,2,3; end
+  local a, b, c = f();
+  assert(a==1 and b==2 and c==3)
+  a, b, c = (f());
+  assert(a==1 and b==nil and c==nil)
+end
+
+local a,b = 3 and f();
+assert(a==1 and b==nil)
+
+function g() f(); return; end;
+assert(g() == nil)
+function g() return nil or f() end
+a,b = g()
+assert(a==1 and b==nil)
+
+print'+';
+
+
+f = [[
+return function ( a , b , c , d , e )
+  local x = a >= b or c or ( d and e ) or nil
+  return x
+end , { a = 1 , b = 2 >= 1 , } or { 1 };
+]]
+f = string.gsub(f, "%s+", "\n");   -- force a SETLINE between opcodes
+f,a = load(f)();
+assert(a.a == 1 and a.b)
+
+function g (a,b,c,d,e)
+  if not (a>=b or c or d and e or nil) then return 0; else return 1; end;
+end
+
+function h (a,b,c,d,e)
+  while (a>=b or c or (d and e) or nil) do return 1; end;
+  return 0;
+end;
+
+assert(f(2,1) == true and g(2,1) == 1 and h(2,1) == 1)
+assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
+assert(f(1,2,'a')
+~=          -- force SETLINE before nil
+nil, "")
+assert(f(1,2,'a') == 'a' and g(1,2,'a') == 1 and h(1,2,'a') == 1)
+assert(f(1,2,nil,1,'x') == 'x' and g(1,2,nil,1,'x') == 1 and
+                                   h(1,2,nil,1,'x') == 1)
+assert(f(1,2,nil,nil,'x') == nil and g(1,2,nil,nil,'x') == 0 and
+                                     h(1,2,nil,nil,'x') == 0)
+assert(f(1,2,nil,1,nil) == nil and g(1,2,nil,1,nil) == 0 and
+                                   h(1,2,nil,1,nil) == 0)
+
+assert(1 and 2<3 == true and 2<3 and 'a'<'b' == true)
+x = 2<3 and not 3; assert(x==false)
+x = 2<1 or (2>1 and 'a'); assert(x=='a')
+
+
+do
+  local a; if nil then a=1; else a=2; end;    -- this nil comes as PUSHNIL 2
+  assert(a==2)
+end
+
+function F(a)
+  assert(debug.getinfo(1, "n").name == 'F')
+  return a,2,3
+end
+
+a,b = F(1)~=nil; assert(a == true and b == nil);
+a,b = F(nil)==nil; assert(a == true and b == nil)
+
+----------------------------------------------------------------
+------------------------------------------------------------------
+
+-- sometimes will be 0, sometimes will not...
+_ENV.GLOB1 = math.floor(os.time()) % 2
+
+-- basic expressions with their respective values
+local basiccases = {
+  {"nil", nil},
+  {"false", false},
+  {"true", true},
+  {"10", 10},
+  {"(0==_ENV.GLOB1)", 0 == _ENV.GLOB1},
+}
+
+print('testing short-circuit optimizations (' .. _ENV.GLOB1 .. ')')
+
+
+-- operators with their respective values
+local binops = {
+  {" and ", function (a,b) if not a then return a else return b end end},
+  {" or ", function (a,b) if a then return a else return b end end},
+}
+
+local cases = {}
+
+-- creates all combinations of '(cases[i] op cases[n-i])' plus
+-- 'not(cases[i] op cases[n-i])' (syntax + value)
+local function createcases (n)
+  local res = {}
+  for i = 1, n - 1 do
+    for _, v1 in ipairs(cases[i]) do
+      for _, v2 in ipairs(cases[n - i]) do
+        for _, op in ipairs(binops) do
+            local t = {
+              "(" .. v1[1] .. op[1] .. v2[1] .. ")",
+              op[2](v1[2], v2[2])
+            }
+            res[#res + 1] = t
+            res[#res + 1] = {"not" .. t[1], not t[2]}
+        end
+      end
+    end
+  end
+  return res
+end
+
+-- do not do too many combinations for soft tests
+local level = _soft and 3 or 4
+
+cases[1] = basiccases
+for i = 2, level do cases[i] = createcases(i) end
+print("+")
+
+local prog = [[if %s then IX = true end; return %s]]
+
+local i = 0
+for n = 1, level do
+  for _, v in pairs(cases[n]) do
+    local s = v[1]
+    local p = load(string.format(prog, s, s), "")
+    IX = false
+    assert(p() == v[2] and IX == not not v[2])
+    i = i + 1
+    if i % 60000 == 0 then print('+') end
+  end
+end
+------------------------------------------------------------------
+
+-- testing some syntax errors (chosen through 'gcov')
+checkload("for x do", "expected")
+checkload("x:call", "expected")
+
+print'OK'