vbscript: Added support for short if statements.

dlls/vbscript/parser.y

@@ -198,7 +198,9 @@ DoType
 IfStatement
     : tIF Expression tTHEN tNL StatementsNl ElseIfs_opt Else_opt tEND tIF
                                             { $$ = new_if_statement(ctx, $2, $5, $6, $7); CHECK_ERROR; }
-    /* FIXME: short if statement */
+    | tIF Expression tTHEN Statement        { $$ = new_if_statement(ctx, $2, $4, NULL, NULL); CHECK_ERROR; }
+    | tIF Expression tTHEN Statement tELSE Statement
+                                            { $$ = new_if_statement(ctx, $2, $4, NULL, $6); CHECK_ERROR; }
 
 ElseIfs_opt
     : /* empty */                           { $$ = NULL; }

dlls/vbscript/tests/lang.vbs

@@ -164,6 +164,29 @@ Call ok(2^3^2 = 64, "2^3^2 = " & (2^3^2))
 Call ok(-3^2 = 9, "-3^2 = " & (-3^2))
 Call ok(2*3^2 = 18, "2*3^2 = " & (2*3^2))
 
+if true then y = true : x = y
+ok x, "x is false"
+
+x = true : if false then x = false
+ok x, "x is false, if false called?"
+
+if not false then x = true
+ok x, "x is false, if not false not called?"
+
+if not false then x = "test" : x = true
+ok x, "x is false, if not false not called?"
+
+if false then x = y : call ok(false, "if false .. : called")
+
+if false then x = y : call ok(false, "if false .. : called") else x = "else"
+Call ok(x = "else", "else not called?")
+
+if true then x = y else y = x : Call ok(false, "in else?")
+
+if false then :
+
+if false then x = y : if true then call ok(false, "embedded if called")
+
 if false then
     ok false, "if false called"
 end if