[Feat] 可变参数 variadic! 目前函数若使用可变参数,参数只能为1个

语法 func (arg...) 获取到的类型为 List
       若要判断类型,使用标准库 std.value.type
[Feat] 标准库 std.io std.value 实现,提供print,read等函数
       详见 Library/std 实现
[Impl] 分离 builtin value 和 function注册

src/Module/Library/std/io/io.fig

@@ -3,7 +3,48 @@ Official Module `std.io`
 Library/std/io/io.fig
 */
 
-public func print(value) -> Null
+import _builtins;
+import noSpace; // sub module `no space print`
+
+// outputs
+
+public func print(objects...) -> Int
 {
-    __fstdout_print(value);
-}
+    var length := objects.length();
+    for var i:=0; i < length; i += 1
+    {
+        if i > 0
+        {
+            __fstdout_print(" ");
+        }
+        __fstdout_print(objects[i]);
+    }
+    return length;
+}
+
+public func println(objects...) -> Int
+{
+    var length := objects.length();
+    for var i:=0; i < length; i += 1
+    {
+        if i > 0
+        {
+            __fstdout_print(" ");
+        }
+        __fstdout_print(objects[i]);
+    }
+    __fstdout_print("\n");
+    return length + 1;
+}
+
+// inputs
+
+public func read() -> String
+{
+    return __fstdin_read();
+}
+
+public func readln() -> String
+{
+    return __fstdin_readln();
+}

src/Module/Library/std/io/noSpace.fig

@@ -0,0 +1,27 @@
+/*
+Official Module `std.io`
+Library/std/io/noSpaces.fig
+*/
+
+import _builtins;
+
+public func print(objects...) -> Int
+{
+    var length := objects.length();
+    for var i:=0; i < length; i += 1
+    {
+        __fstdout_print(objects[i]);
+    }
+    return length;
+}
+
+public func println(objects...) -> Int
+{
+    var length := objects.length();
+    for var i:=0; i < length; i += 1
+    {
+        __fstdout_print(objects[i]);
+    }
+    __fstdout_print("\n");
+    return length + 1;
+}

src/Module/Library/std/std.fig

@@ -3,4 +3,5 @@ Official Module `std`
 Library/std/std.fig
 */
 
-import io; // link std io
+import io; // link std.io
+import value; // link std.type

src/Module/Library/std/value/value.fig

@@ -0,0 +1,53 @@
+/*
+Official Module `std.value`
+Library/std/value/value.fig
+*/
+
+import _builtins;
+
+public func type(object: Any) -> String
+{
+    return __fvalue_type(object);
+}
+
+public func int_parse(number: String) -> Int
+{
+    return __fvalue_int_parse(number);
+}
+
+public func int_from(number: Any) -> Any
+{
+    var ntype := type(number);
+    if ntype == "Double" or ntype == "Bool"
+    {
+        return __fvalue_int_from(number);
+    }
+    if ntype == "Int"
+    {
+        return number;
+    }
+    return null;
+}
+
+public func double_parse(number: String) -> Double
+{
+    return __fvalue_double_parse(number);
+}
+
+public func double_from(number: Any) -> Any
+{
+    if ntype == "Int" or ntype == "Bool"
+    {
+        return __fvalue_double_from(number);
+    }
+    if ntype == "Double"
+    {
+        return number;
+    }
+    return null;
+}
+
+public func string_from(obj: Any) -> String
+{
+    return __fvalue_string_from(obj);
+}