Implement BIN$

SMILEBASIC/builtinfunctions.d

@@ -1350,12 +1350,18 @@ class BuiltinFunction
         str2[digits - str.length..digits] = str;
         return str2[0..digits].to!wstring;
     }
+    /+
+    HEX$(1,0)=>1
+    HEX$(1)=>1
+    HEX$(1,)=>1(???)
+    HEX$(1,2)=>01
+    +/
     static wstring HEX(int val, DefaultValue!(int, false) digits)
     {
         import std.format;
         if(digits > 8 || digits < 0)
         {
-            throw new OutOfRange();
+            throw new OutOfRange("HEX$", 2);
         }
         FormatSpec!char f;
         f.spec = 'X';
@@ -1365,6 +1371,31 @@ class BuiltinFunction
         formatValue(w, val, f);
         return cast(immutable)(w.data);
     }
+    /+
+    BIN$(1,0)=>1
+    BIN$(1)=>1
+    BIN$(1,)=>Type mismatch(BIN$:2)
+    BIN$(1,2)=>01
+    +/
+    static wstring BIN(int val)
+    {
+        return val.to!wstring(2);
+    }
+    static wstring BIN(int val, int digits)
+    {
+        import std.format;
+        if(digits > 32 || digits < 0)
+        {
+            throw new OutOfRange("BIN$", 2);
+        }
+        FormatSpec!char f;
+        f.spec = 'b';
+        f.flZero = true;
+        f.width = digits;
+        auto w = appender!wstring();
+        formatValue(w, val, f);
+        return cast(immutable)(w.data);
+    }
     static void SPSET(PetitComputer p, int id, int defno, DefaultValue!(int, false) V, DefaultValue!(int, false) W, DefaultValue!(int, false) H, DefaultValue!(int, false) ATTR)
     {
         if(!V.isDefault && !W.isDefault)

SMILEBASIC/parser.d

@@ -1926,15 +1926,23 @@ class Parser
                 {
                     auto func = new CallFunction(token.value.stringValue, lex.location);
                     node = func;
+                    lex.popFront();
+                    if(lex.front().type != TokenType.RParen)
+                    {
                         //関数呼び出しだった
                         while(true)
                         {
-                        lex.popFront();
                             token = lex.front();
 
-                        if(token.type == TokenType.RParen) break;
                             func.addArg(expression());
                             if(lex.front().type == TokenType.RParen) break;
+                            if(lex.front().type != TokenType.Comma)
+                            {
+                                syntaxError();
+                                break;
+                            }
+                            lex.popFront();
+                        }
                     }
                 }
                 else