Ticket #114: pow-expr.patch

Source/BackEndClr/SharpGenerator.cobra

@@ -4086 +4086 @@
             on 'STAR_EQUALS'
                 op = '*='
             on 'STARSTAR_EQUALS'
-                op = 'CobraLangInternal.CobraImp.PowerToEquals('
+                #op = 'CobraLangInternal.CobraImp.PowerToEquals('
+                op = 'System.Math.Pow('
             on 'SLASH_EQUALS'
                 op = '/='  # TODO: finish this
             on 'SLASHSLASH_EQUALS'
@@ -4226 +4227 @@
             on 'STAR'
                 op = '*'
             on 'STARSTAR'
-                op = 'CobraLangInternal.CobraImp.PowerTo('
+                #op = 'CobraLangInternal.CobraImp.PowerTo('
+                op = 'System.Math.Pow('
+                if _left.isKindOf(intType) and _right.isKindOf(intType)
+                    pre = '(' + .compiler.intType.sharpRef + ')'
             on 'SLASH'
                 op = '/'
                 if _left.isKindOf(intType) and _right.isKindOf(intType)

Source/BinaryOpExpr.cobra

@@ -452 +452 @@
 
     cue init(opToken as IToken, op as String, left as Expr, right as Expr)
         base.init(opToken, op, left, right)
-        assert op in ['PLUS', 'MINUS', 'STAR', 'SLASH', 'SLASHSLASH', 'PERCENT']
+        assert op in ['PLUS', 'MINUS', 'STAR', 'STARSTAR', 'SLASH', 'SLASHSLASH', 'PERCENT']
 
     def _bindImp
         base._bindImp

Tests/100-basics/930-pow-expr.cobra

@@ +1 @@
+class Pwr
+
+    def main is shared
+        for i in [2,3,4,5]
+            #x = (10 ** i) to int
+            x = 10 ** i
+            #print x
+            assert x in [100, 1000, 10000, 100000]
+            
+            y = 2 ** i
+            #print y
+            assert y in [4,8,16,32]
+            
+        for j in [2f, 3f, 4f, 5f]   
+            z = 3 ** j
+            #print z
+            assert z.getType is Double
+            assert z in [9f, 27f, 81f, 243f]
+            
+        f = 1.1f ** 3f  # 1.331
+        assert f >= 1.331f and f < 1.3311f

Developer/IntermediateReleaseNotes.text

@@ -29 +29 @@
 
 * Initializers must now start with a call to another initializer in the same class or a base initializer. In other words, calls to the base initializer are not invisibly inserted by the compiler.
 
+* Minimal support for ** operator (power expressions): ticket 114
 
+
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 Library
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