doc: add var syntax samples

doc/sample/Expressions.im

@@ -1,30 +1,30 @@
-y = 1 + 2 * 3 / 4 * 5 - 6 + 7 multiplyBy:2.
+var y = 1 + 2 * 3 / 4 * 5 - 6 + 7 multiplyBy:2.
-z = w = 2 + 3 multiplyBy:2.
+var z = w = 2 + 3 multiplyBy:2.
-x = (((1 + 2 * 3) multiplyBy:3) add: 5) + 2.
+var x = (((1 + 2 * 3) multiplyBy:3) add: 5) + 2.
 x = ((1 + 2 * 3) multiplyBy:3).
-p = 5 multiply(by:3 add:(2 + 1)).
+var p = 5 multiply(by:3 add:(2 + 1)).
-q = 10 squared squared.
+var q = 10 squared squared.
 
 p1
     setAge:2 squared squared + 4 squared multiply(by:2 add:4 + 1 * 3)
     in:"mon" + "ths".
 
-M = xz multiply(by:3 add:2) squared.
+var m = xz multiply(by:3 add:2) squared.
 
-M = xz multiply(by:3 add:2); squared.
+m = xz multiply(by:3 add:2); squared.
 
-x = OrderedCollection new
+var x = OrderedCollection new
 	add: 2;
 	add: 4;
 	add: 6;
 	yourself.
 
-age = Person new(name:"John Doe" age:34)
+var age = Person new(name:"John Doe" age:34)
     setAge:144 inUnit:"months";
     ageInMonths.
 
 x = 5.
-q = 10 if x > 2.
+var q = 10 if x > 2 else 20.
 q = if x > 2 then 10 else 20 end.
 
 cout put:5 multiply(by:5 add:2) if x > 2.
@@ -35,7 +35,7 @@ else
 	cout put:"Less"
 end
 
-Q = match yz in
+var q = match yz in
 	1 => age = age,
 	2 => age = age / 12,
 	3 => age = age / 365,
@@ -53,14 +53,14 @@ end
 cout put:"message" while x > 2.
 cout put:'Count is {i}' for i in 0 to:100 step:2.
 
-z = do
+var z = do
-    x = 1.
+    var x = 1.
-    y = 2.
+    var y = 2.
     ^x + y
 end.
 
-j = [ cout put:'Hello!' ].
+var j = [ cout put:'Hello!' ].
-k = [ :x :y | cout put:'Hello, {x}, {y}!' ].
+var k = [ :x :y | cout put:'Hello, {x}, {y}!' ].
 
 x > 2
     if:[ cout put:'True' ]
@@ -70,7 +70,7 @@ x > 2
 
 p1 test(param:'Hello' :'World').
 
-pkg = {}.
+var pkg = {}.
 pkg = { 0 }.
 pkg = { 1, 2, 3, 4, 5 }.
 pkg = { 10, 2 => "Hello", 9, 5 => "World", 14 }.
@@ -92,11 +92,11 @@ pkg['x'] = 32.
 pkg->x = 32.
 pkg at:'x' put:32.
 
-v = pkg['x'].
+var v = pkg['x'].
 v = pkg->x.
 v = pkg at:'x'.
 
-pkg2 = {
+var pkg2 = {
     onEnter => [
         cout put:'start!'
     ],
@@ -106,6 +106,6 @@ pkg2 = {
     ]
 }.
 
-index = 'x'.
+var index = 'x'.
 pkg[index] = 32.
 pkg at:index put:32.

doc/sample/Person.im

@@ -48,6 +48,7 @@ class Person
         compatibility with lambdas.
     **/
     - init(name:name age:age)
+        var x.
         self::name = name.
         self::age = age!
 

doc/sample/Simple.im

@@ -1,3 +1 @@
-v = 2 + 3 * 4.
+2 + 3 * 4.
-
-cout put:v

doc/sample/Var.im

@@ -0,0 +1,4 @@
+var x = 2 + 3.
+var y = x.
+var z.
+var (x, y) = (3, 4).