{
public class Xex
{
- public struct Name
+ public struct Name : IEquatable<Name>
{
private static NameTable nt = new NameTable ();
name = nt.Add (str);
}
- public Name (XmlAttribute attr)
- {
- name = nt.Add (attr.Value);
- }
-
- public Name (XmlNode node)
- {
- name = node.Name;
- }
-
public static implicit operator Name (string str)
{
return new Name (str);
}
- public static implicit operator Name (XmlAttribute attr)
- {
- return new Name (attr);
- }
-
- public static implicit operator Name (XmlNode node)
- {
- return new Name (node);
- }
-
public static implicit operator string (Name name)
{
return name.name;
return (object) n1.name == (object) n2.name;
}
- public static bool operator== (Name n1, string n2)
+ public static bool operator!= (Name n1, Name n2)
{
- return (object) n1.name == (object) n2;
+ return (object) n1.name != (object) n2.name;
}
- public static bool operator== (string n1, Name n2)
+ public static bool operator== (Name n1, string n2)
{
- return (object) n1 == (object) n2.name;
+ return (object) n1.name == (object) n2;
}
- public static bool operator!= (Name n1, Name n2)
+ public static bool operator!= (Name n1, string n2)
{
- return (object) n1.name != (object) n2.name;
+ return (object) n1.name != (object) n2;
}
- public static bool operator!= (Name n1, string n2)
+ public static bool operator== (string n1, Name n2)
{
- return (object) n1.name != (object) n2;
+ return (object) n1 == (object) n2.name;
}
public static bool operator!= (string n1, Name n2)
return (object) n1 != (object) n2.name;
}
- public override bool Equals (object other)
+ public bool Equals (Name name)
+ {
+ return Object.ReferenceEquals (this.name, name.name);
+ }
+
+ public override bool Equals (object obj)
{
- Console.WriteLine ("Equals (object)");
- return Object.ReferenceEquals (this, other);
+ return Object.ReferenceEquals (this.name, obj);
}
public override int GetHashCode ()
}
public static NameTable Table { get { return nt; } }
+
+ public override string ToString () { return name; }
}
+ private static Name Nexpr = "expr";
+ private static Name Ntype = "type";
+
private static Name Ninteger = "integer";
private static Name Nstring = "string";
private static Name Nboolean = "boolean";
private static Name Nlist = "list";
private static Name Nobject = "object";
+ private static Name Ndefun = "defun";
+ private static Name Nfname = "fname";
+ private static Name Nargs = "args";
+ private static Name Noptional = "optional";
+ private static Name Nrest = "rest";
+ private static Name Nbody = "body";
+
+ private static Name Ndefvar = "defvar";
private static Name Nconst = "const";
- private static Name Nvariable = "varialbe";
+ private static Name Nvariable = "variable";
+ private static Name Ndescription = "description";
+ private static Name Npossible_value = "possible-value";
private static Name Nfuncall = "funcall";
- private static Name Nmname = "mname";
private static Name Nprogn = "progn";
internal class Function
{
internal class Lambda
{
- internal Name[] args;
+ internal Xex[] args;
internal Xex[] body;
- public Lambda (XmlNode node, Domain domain)
+ public void SetArgs (XmlNode node, int nargs, Domain domain)
{
- Set (node, domain);
+ args = new Xex[nargs];
+ node = node.FirstChild;
+ for (int i = 0; i < nargs; node = node.NextSibling)
+ if (node.Name != Noptional && node.Name != Nrest)
+ args[i++] = new Xex (node, domain);
}
- public void Set (XmlNode node, Domain domain)
+ public void SetBody (XmlNode node, Domain domain)
{
- XmlNodeList body = node.ChildNodes;
- int idx = 0;
+ XmlNodeList nlist = node.ChildNodes;
- if (body[0].Name == "args")
- {
- XmlNodeList args = body[0].ChildNodes;
- if (this.args == null)
- this.args = new Name[args.Count];
- for (int i = 0; i < args.Count; i++)
- this.args[i] = args[i].InnerText;
- idx++;
- }
- else if (this.args == null)
- this.args = new Name[0];
- if (this.body == null)
- this.body = new Xex[body.Count - idx];
- for (int i = 0; idx < body.Count; i++, idx++)
- this.body[i] = new Xex (body[idx], domain);
+ body = new Xex[nlist.Count];
+ for (int i = 0; i < nlist.Count; i++)
+ body[i] = new Xex (nlist[i], domain);
}
}
this.specialp = specialp;
}
- internal Function (Name name, XmlNode node, Domain domain)
+ public Function (Name name, int min_arg, int max_arg)
{
this.name = name;
- lambda = new Lambda (node, domain);
- this.min_arg = this.max_arg = lambda.args.Length;
+ this.min_arg = min_arg;
+ this.max_arg = max_arg;
+ }
+
+ public void Setup (XmlNode node, Domain domain)
+ {
+ lambda = new Lambda ();
+ node = node.FirstChild;
+ if (node.Name == Nargs)
+ {
+ lambda.SetArgs (node, max_arg, domain);
+ node = node.NextSibling;
+ }
+ if (node.Name == Nbody)
+ lambda.SetBody (node, domain);
}
- private Function ()
+ public static Name ParseHead (XmlNode node,
+ out int min_arg, out int max_arg)
{
- name = "nil";
+ Name name = node.Attributes[Nfname].Value;
+ int nargs = 0, noptions = 0, nrest = 0;
+ XmlNode n;
+
+ for (n = node.FirstChild; n != null; n = n.NextSibling)
+ {
+ if (n.Name == Noptional || n.Name == Nrest)
+ break;
+ nargs++;
+ }
+ if (n != null && n.Name == Noptional)
+ for (n = n.NextSibling; n != null; n = n.NextSibling)
+ {
+ if (n.Name == Nrest)
+ break;
+ noptions++;
+ }
+ if (n != null && n.Name == Nrest)
+ for (n = n.NextSibling; n != null; n = n.NextSibling)
+ nrest++;
+ min_arg = nargs;
+ max_arg = nargs + noptions + nrest;
+ if (nrest == 1)
+ max_arg = - max_arg;
+ return name;
}
public object Call (Xex[] args, Domain domain)
Bindings current = domain.bindings;
object result = false;
+ Console.Write ("calling (" + this);
try {
- if (! specialp)
- foreach (Xex e in args)
- e.Eval (domain);
+ foreach (Xex e in args)
+ Console.Write (" " + e);
+ Console.Write (") => ");
if (builtin != null)
- return builtin (args, domain);
- if (lambda == null)
- return null;
+ {
+ if (! specialp)
+ foreach (Xex a in args)
+ if (a.Eval (domain) == null)
+ throw new Exception (a + ":evaled to null");
+ result = builtin (args, domain);
+ Console.WriteLine (result);
+ return result;
+ }
+ int i;
+ for (i = 0; i < min_arg; i++)
+ {
+ Xex a = lambda.args[i];
+ bool isdirect = a.args == null;
+ Name name = isdirect ? (Name) a.val : (Name) a.args[0].val;
+ Variable var = new VarMisc (name, null);
+
+ domain.variables[name] = var;
+ if (isdirect)
+ domain.Bind (var, args[i]);
+ else
+ domain.Bind (var, args[i].Eval (domain));
+ }
foreach (Xex e in lambda.body)
result = e.Eval (domain);
+ Console.WriteLine (result);
} finally {
domain.UnboundTo (current);
}
return result;
}
+
+ public override string ToString ()
+ {
+ string str;
+
+ if (builtin != null)
+ str = name;
+ else
+ {
+ str = "(" + name;
+ foreach (Xex a in lambda.args)
+ str += " " + a;
+ str += ")";
+ }
+ return str;
+ }
}
internal abstract class Variable
public Variable (Name name, Name type, object value)
{
+ if (value != null)
+ Value = value;
this.name = name;
this.type = type;
- val = value;
}
public object Value
public abstract bool ValueP (object value);
- public override string ToString () { return name + "(" + type + ")"; }
+ public override string ToString () { return name + "=" + val; }
}
internal class VarInt : Variable
public Range[] ranges;
- public VarInt (Name name, int value) : base (name, Ninteger, value) { }
+ public VarInt (Name name, object value) : base (name, Ninteger, value) { }
public override bool ValueP (object value)
{
{
public string[] ranges;
- public VarStr (Name name, string value) : base (name, Nstring, value) { }
+ public VarStr (Name name, object value) : base (name, Nstring, value) { }
public override bool ValueP (object value)
{
internal class VarBool : Variable
{
- public VarBool (Name name, bool value) : base (name, Nboolean, value) { }
+ public VarBool (Name name, object value)
+ : base (name, Nboolean, value) { }
public override bool ValueP (object value)
{
- return value is bool;
+ if (! (value is bool))
+ return false;
+ return true;
}
}
}
}
+#if false
internal class ThrowException : Exception
{
Name tag;
this.value = value;
}
}
+#endif
public class Domain
{
- private Domain parent;
public object context;
- internal Dictionary<Name, Function> functions
- = new Dictionary<Name, Function> ();
- internal Dictionary<Name, Variable> variables
- = new Dictionary<Name, Variable> ();
+ internal Dictionary<Name, Function> functions;
+ internal Dictionary<Name, Variable> variables;
internal Bindings bindings;
- internal Domain () { }
+ internal Domain ()
+ {
+ functions = new Dictionary<Name, Function> ();
+ variables = new Dictionary<Name, Variable> ();
+ }
- public Domain (object context) : this (basic, context) { }
+ public Domain (object context) : this (basic, context)
+ {
+ }
public Domain (Domain parent, object context)
{
- this.parent = parent;
+ functions = new Dictionary<Name, Function> (parent.functions);
+ variables = new Dictionary<Name, Variable> (parent.variables);
this.context = context;
}
internal void UnboundTo (Bindings boundary)
{
- bindings = bindings.UnboundTo (boundary);
+ if (bindings != null)
+ bindings = bindings.UnboundTo (boundary);
}
public void Defun (Name name, Builtin builtin, int min_arg, int max_arg)
Defun (name, builtin, min_arg, max_arg, false);
}
- public void Defun (Name name, Builtin builtin, int min_arg, int max_arg,
- bool specialp)
+ public void Defun (Name name, Builtin builtin,
+ int min_arg, int max_arg, bool specialp)
{
Function func;
}
}
- public void Defun (XmlNode node)
+ internal Function RegisterFunction (XmlNode node)
{
- Name name = node.Attributes["id"];
+ int min_arg, max_arg;
+ Name name = Function.ParseHead (node, out min_arg, out max_arg);
+ Function func = new Function (name, min_arg, max_arg);
+
+ functions[name] = func;
+ return func;
+ }
+
+ internal Function Defun (XmlNode node)
+ {
+ Name name = node.Attributes[Nfname].Value;
Function func;
- if (functions.TryGetValue (name, out func))
- {
- XmlNode args = node.FirstChild;
- int nargs = args.Name == "args" ? args.ChildNodes.Count : 0;
+ if (! functions.TryGetValue (name, out func))
+ func = RegisterFunction (node);
+ func.Setup (node, this);
+ return func;
+ }
- if (func.min_arg < nargs || func.max_arg > nargs)
- throw new Exception ("Incompatible argument numbers to override: "
- + name);
- func.lambda.Set (node, this);
- func.builtin = null;
+ public void Defvar (Name name, XmlNode node)
+ {
+ Variable vari;
+
+ if (node.Name == Ndescription)
+ node = node.NextSibling;
+ if (node.Name == Nconst)
+ {
+ Name type = (Name) node.Attributes[Ntype].Value;
+ string val = node.Value;
+ XmlNodeList range_list = null;
+ int nranges = 0;
+
+ node = node.NextSibling;
+ if (node.Name == Npossible_value)
+ {
+ range_list = node.ChildNodes;
+ nranges = range_list.Count;
+ }
+
+ if (type == Ninteger)
+ {
+ VarInt vi = new VarInt (name, parse_integer (val));
+ if (range_list != null)
+ {
+ vi.ranges = new VarInt.Range[nranges];
+
+ for (int i = 0; i < nranges; i++)
+ {
+ XmlNode n = range_list[i];
+
+ if (n.Name == Nconst)
+ {
+ int num = parse_integer (n.Value);
+ vi.ranges[i].from = vi.ranges[i].to = num;
+ }
+ else // range_list[i].Name == "range"
+ {
+ vi.ranges[i].from =
+ parse_integer (n.FirstChild.Value);
+ vi.ranges[i].to =
+ parse_integer (n.LastChild.Value);
+ }
+ }
+ }
+ vari = vi;
+ }
+ else if (type == Nstring)
+ {
+ VarStr vs = new VarStr (name, val);
+ if (range_list != null)
+ vs.ranges = new string[nranges];
+ for (int i = 0; i < nranges; i++)
+ vs.ranges[i] = range_list[i].Value;
+ vari = vs;
+ }
+ else if (type == Nboolean)
+ {
+ vari = new VarBool (name, val == "true");
+ }
+ else
+ throw new Exception ("Unknown type: " + type);
}
else
- {
- func = new Function (name, node, this);
- functions[name] = func;
- }
+ vari = new VarMisc (name, null);
+ variables[name] = vari;
}
internal Function GetFunc (Name name)
Function func;
if (! functions.TryGetValue (name, out func))
- {
- if (parent != null)
- return parent.GetFunc (name);
- throw new Exception ("Unknown function: " + name);
- }
+ throw new Exception ("Unknown function: " + name);
return func;
}
str += ") (variabls";
foreach (KeyValuePair<Name, Variable> kv in variables)
str += " " + kv.Key;
- str += " " + bindings;
+ str += ")";
+ if (bindings != null)
+ str += " " + bindings;
if (context != null)
str += " (" + context + ")";
str += ">";
basic.Defun ("||", or, 1, -1, false);
basic.Defun ("not", not, 1, 1, false);
basic.Defun ("!", not, 1, 1, false);
+ basic.Defun ("add", add, 2, -1, false);
basic.Defun ("+", add, 2, -1, false);
+ basic.Defun ("mul", mul, 2, -1, false);
basic.Defun ("*", mul, 2, -1, false);
+ basic.Defun ("sub", sub, 1, -1, false);
basic.Defun ("-", sub, 1, -1, false);
+ basic.Defun ("div", div, 2, -1, false);
basic.Defun ("/", div, 2, -1, false);
+ basic.Defun ("mod", mod, 2, 2, false);
basic.Defun ("%", mod, 2, 2, false);
+ basic.Defun ("logior", logior, 2, -1, false);
basic.Defun ("|", logior, 2, -1, false);
+ basic.Defun ("logand", logand, 2, -1, false);
basic.Defun ("&", logand, 2, -1, false);
+ basic.Defun ("add-set", add_set, 2, -1, true);
basic.Defun ("+=", add_set, 2, -1, true);
+ basic.Defun ("mul-set", mul_set, 2, -1, true);
basic.Defun ("*=", mul_set, 2, -1, true);
+ basic.Defun ("sub-set", sub_set, 2, -1, true);
basic.Defun ("-=", sub_set, 2, -1, true);
+ basic.Defun ("div-set", div_set, 2, -1, true);
basic.Defun ("/=", div_set, 2, -1, true);
+ basic.Defun ("mod-set", mod_set, 2, 2, true);
basic.Defun ("%=", mod_set, 2, 2, true);
+ basic.Defun ("logior-set", logior_set, 2, -1, true);
basic.Defun ("|=", logior_set, 2, -1, true);
+ basic.Defun ("logand-set", logand_set, 2, -1, true);
basic.Defun ("&=", logand_set, 2, -1, true);
+ basic.Defun ("lsh", lsh, 2, 2, false);
basic.Defun ("<<", lsh, 2, 2, false);
+ basic.Defun ("rsh", rsh, 2, 2, false);
basic.Defun (">>", rsh, 2, 2, false);
+ basic.Defun ("lsh-set", lsh_set, 2, 2, true);
basic.Defun ("<<=", lsh_set, 2, 2, true);
+ basic.Defun ("rsh-set", rsh_set, 2, 2, true);
basic.Defun (">>=", rsh_set, 2, 2, true);
+ basic.Defun ("eq", eq, 2, -1, false);
basic.Defun ("==", eq, 2, -1, false);
+ basic.Defun ("noteq", noteq, 2, 2, false);
basic.Defun ("!=", noteq, 2, 2, false);
+ basic.Defun ("lt", less_than, 2, -1, false);
basic.Defun ("<", less_than, 2, -1, false);
+ basic.Defun ("le", less_eq, 2, -1, false);
basic.Defun ("<=", less_eq, 2, -1, false);
+ basic.Defun ("gt", greater_than, 2, -1, false);
basic.Defun (">", greater_than, 2, -1, false);
+ basic.Defun ("ge", greater_eq, 2, -1, false);
basic.Defun (">=", greater_eq, 2, -1, false);
+ basic.Defun ("eval", eval_clause, 1, 1, true);
basic.Defun ("progn", progn_clause, 0, -1, true);
+ basic.Defun ("expr", progn_clause, 0, -1, true);
basic.Defun ("if", if_clause, 2, -1, true);
basic.Defun ("when", when_clause, 1, -1, true);
basic.Defun ("while", while_clause, 1, -1, true);
return n;
}
- private static object mul (Xex[] args, Domain domain)
- {
- int n = 1;
- foreach (Xex e in args)
- n *= (int) e.val;
- return n;
- }
-
- private static object sub (Xex[] args, Domain domain)
- {
- int n = (int) args[0].val;
- if (args.Length == 1)
- return - n;
- for (int i = 1; i < args.Length; i++)
- n -= (int) args[i].val;
- return n;
- }
+ private static object mul (Xex[] args, Domain domain)
+ {
+ int n = 1;
+ foreach (Xex e in args)
+ n *= (int) e.val;
+ return n;
+ }
- private static object div (Xex[] args, Domain domain)
- {
- int n = (int) args[0].val;
- for (int i = 1; i < args.Length; i++)
- n /= (int) args[i].val;
- return n;
- }
+ private static object sub (Xex[] args, Domain domain)
+ {
+ int n = (int) args[0].val;
+ if (args.Length == 1)
+ return - n;
+ for (int i = 1; i < args.Length; i++)
+ n -= (int) args[i].val;
+ return n;
+ }
- private static object mod (Xex[] args, Domain domain)
- {
- return ((int) args[0].val % (int) args[1].val);
- }
+ private static object div (Xex[] args, Domain domain)
+ {
+ int n = (int) args[0].val;
+ for (int i = 1; i < args.Length; i++)
+ n /= (int) args[i].val;
+ return n;
+ }
- private static object logior (Xex[] args, Domain domain)
- {
- int n = 0;
- foreach (Xex e in args)
- n |= (int) e.val;
- return n;
- }
+ private static object mod (Xex[] args, Domain domain)
+ {
+ return ((int) args[0].val % (int) args[1].val);
+ }
- private static object logand (Xex[] args, Domain domain)
- {
- int n = (int) args[0].val;
- for (int i = 1; i < args.Length; i++)
- n &= (int) args[i].val;
- return n;
- }
+ private static object logior (Xex[] args, Domain domain)
+ {
+ int n = 0;
+ foreach (Xex e in args)
+ n |= (int) e.val;
+ return n;
+ }
- private static object add_set (Xex[] args, Domain domain)
- {
- Variable vari = domain.GetVar (args[0]);
- int n = (int) vari.val;
+ private static object logand (Xex[] args, Domain domain)
+ {
+ int n = (int) args[0].val;
+ for (int i = 1; i < args.Length; i++)
+ n &= (int) args[i].val;
+ return n;
+ }
- for (int i = 1; i < args.Length; i++)
- n += (int) args[i].val;
- vari.val = n;
- return n;
- }
+ private static object add_set (Xex[] args, Domain domain)
+ {
+ Variable vari = domain.GetVar (args[0]);
+ int n = (int) vari.val;
- private static object mul_set (Xex[] args, Domain domain)
- {
- Variable vari = domain.GetVar (args[0]);
- int n = (int) vari.val;
+ for (int i = 1; i < args.Length; i++)
+ n += (int) args[i].val;
+ vari.val = n;
+ return n;
+ }
- for (int i = 1; i < args.Length; i++)
- n *= (int) args[i].val;
- vari.val = n;
- return n;
- }
+ private static object mul_set (Xex[] args, Domain domain)
+ {
+ Variable vari = domain.GetVar (args[0]);
+ int n = (int) vari.val;
- private static object sub_set (Xex[] args, Domain domain)
- {
- Variable vari = domain.GetVar (args[0]);
- int n = (int) vari.val;
+ for (int i = 1; i < args.Length; i++)
+ n *= (int) args[i].val;
+ vari.val = n;
+ return n;
+ }
- for (int i = 1; i < args.Length; i++)
- n -= (int) args[i].val;
- vari.val = n;
- return n;
- }
+ private static object sub_set (Xex[] args, Domain domain)
+ {
+ Variable vari = domain.GetVar (args[0]);
+ int n = (int) vari.val;
- private static object div_set (Xex[] args, Domain domain)
- {
- Variable vari = domain.GetVar (args[0]);
- int n = (int) vari.val;
+ for (int i = 1; i < args.Length; i++)
+ n -= (int) args[i].val;
+ vari.val = n;
+ return n;
+ }
- for (int i = 1; i < args.Length; i++)
- n /= (int) args[i].val;
- vari.val = n;
- return n;
- }
+ private static object div_set (Xex[] args, Domain domain)
+ {
+ Variable vari = domain.GetVar (args[0]);
+ int n = (int) vari.val;
- private static object mod_set (Xex[] args, Domain domain)
- {
- Variable vari = domain.GetVar (args[0]);
- int n = (int) vari.val;
+ for (int i = 1; i < args.Length; i++)
+ n /= (int) args[i].val;
+ vari.val = n;
+ return n;
+ }
- for (int i = 1; i < args.Length; i++)
- n %= (int) args[i].val;
- vari.val = n;
- return n;
- }
+ private static object mod_set (Xex[] args, Domain domain)
+ {
+ Variable vari = domain.GetVar (args[0]);
+ int n = (int) vari.val;
- private static object logior_set (Xex[] args, Domain domain)
- {
- Variable vari = domain.GetVar (args[0]);
- int n = (int) vari.val;
+ for (int i = 1; i < args.Length; i++)
+ n %= (int) args[i].val;
+ vari.val = n;
+ return n;
+ }
- for (int i = 1; i < args.Length; i++)
- n |= (int) args[i].val;
- vari.val = n;
- return n;
- }
+ private static object logior_set (Xex[] args, Domain domain)
+ {
+ Variable vari = domain.GetVar (args[0]);
+ int n = (int) vari.val;
- private static object logand_set (Xex[] args, Domain domain)
- {
- Variable vari = domain.GetVar (args[0]);
- int n = (int) vari.val;
+ for (int i = 1; i < args.Length; i++)
+ n |= (int) args[i].val;
+ vari.val = n;
+ return n;
+ }
- for (int i = 1; i < args.Length; i++)
- n &= (int) args[i].val;
- vari.val = n;
- return n;
- }
+ private static object logand_set (Xex[] args, Domain domain)
+ {
+ Variable vari = domain.GetVar (args[0]);
+ int n = (int) vari.val;
- private static object lsh (Xex[] args, Domain domain)
- {
- return (int) args[0].val << (int) args[1].val;
- }
+ for (int i = 1; i < args.Length; i++)
+ n &= (int) args[i].val;
+ vari.val = n;
+ return n;
+ }
- private static object lsh_set (Xex[] args, Domain domain)
- {
- Variable vari = domain.GetVar (args[0]);
- int n = (int) vari.val;
+ private static object lsh (Xex[] args, Domain domain)
+ {
+ return (int) args[0].val << (int) args[1].val;
+ }
- n <<= (int) args[1].val;
- vari.val = n;
- return n;
- }
+ private static object lsh_set (Xex[] args, Domain domain)
+ {
+ Variable vari = domain.GetVar (args[0]);
+ int n = (int) vari.val;
- private static object rsh (Xex[] args, Domain domain)
- {
- return (int) args[0].val >> (int) args[1].val;
- }
+ n <<= (int) args[1].val;
+ vari.val = n;
+ return n;
+ }
- private static object rsh_set (Xex[] args, Domain domain)
- {
- Variable vari = domain.GetVar (args[0]);
- int n = (int) vari.val;
+ private static object rsh (Xex[] args, Domain domain)
+ {
+ return (int) args[0].val >> (int) args[1].val;
+ }
- n >>= (int) args[1].val;
- vari.val = n;
- return n;
- }
+ private static object rsh_set (Xex[] args, Domain domain)
+ {
+ Variable vari = domain.GetVar (args[0]);
+ int n = (int) vari.val;
- private static object eq (Xex[] args, Domain domain)
- {
- int n = (int) args[0].val;
+ n >>= (int) args[1].val;
+ vari.val = n;
+ return n;
+ }
- for (int i = 1; i < args.Length; i++)
- if (n != (int) args[i].val)
- return false;
- return true;
- }
+ private static object eq (Xex[] args, Domain domain)
+ {
+ int n = (int) args[0].val;
- private static object noteq (Xex[] args, Domain domain)
- {
- return ((int) args[0].val != (int) args[1].val);
- }
+ for (int i = 1; i < args.Length; i++)
+ if (n != (int) args[i].val)
+ return false;
+ return true;
+ }
- private static object less_than (Xex[] args, Domain domain)
- {
- int n = (int) args[0].val;
+ private static object noteq (Xex[] args, Domain domain)
+ {
+ return ((int) args[0].val != (int) args[1].val);
+ }
- for (int i = 1; i < args.Length; i++)
- {
- int n1 = (int) args[i].val;
- if (n >= n1)
- return false;
- n = n1;
- }
- return true;
- }
+ private static object less_than (Xex[] args, Domain domain)
+ {
+ int n = (int) args[0].val;
- private static object less_eq (Xex[] args, Domain domain)
- {
- int n = (int) args[0].val;
- for (int i = 1; i < args.Length; i++)
- {
- int n1 = (int) args[i].val;
- if (n > n1)
- return false;
- n = n1;
- }
- return true;
- }
+ for (int i = 1; i < args.Length; i++)
+ {
+ int n1 = (int) args[i].val;
+ if (n >= n1)
+ return false;
+ n = n1;
+ }
+ return true;
+ }
- private static object greater_than (Xex[] args, Domain domain)
- {
- int n = (int) args[0].val;
- for (int i = 1; i < args.Length; i++)
- {
- int n1 = (int) args[i].val;
- if (n <= n1)
- return false;
- n = n1;
- }
- return true;
- }
+ private static object less_eq (Xex[] args, Domain domain)
+ {
+ int n = (int) args[0].val;
+ for (int i = 1; i < args.Length; i++)
+ {
+ int n1 = (int) args[i].val;
+ if (n > n1)
+ return false;
+ n = n1;
+ }
+ return true;
+ }
- private static object greater_eq (Xex[] args, Domain domain)
- {
- int n = (int) args[0].val;
- for (int i = 1; i < args.Length; i++)
- {
- int n1 = (int) args[i].val;
- if (n < n1)
- return false;
- n = n1;
- }
- return true;
- }
+ private static object greater_than (Xex[] args, Domain domain)
+ {
+ int n = (int) args[0].val;
+ for (int i = 1; i < args.Length; i++)
+ {
+ int n1 = (int) args[i].val;
+ if (n <= n1)
+ return false;
+ n = n1;
+ }
+ return true;
+ }
- private static object progn_clause (Xex[] args, Domain domain)
- {
- object result = true;
+ private static object greater_eq (Xex[] args, Domain domain)
+ {
+ int n = (int) args[0].val;
+ for (int i = 1; i < args.Length; i++)
+ {
+ int n1 = (int) args[i].val;
+ if (n < n1)
+ return false;
+ n = n1;
+ }
+ return true;
+ }
- foreach (Xex e in args)
- result = e.Eval (domain);
- return result;
- }
+ private static object eval_clause (Xex[] args, Domain domain)
+ {
+ return args[0].Eval (domain);
+ }
- private static object if_clause (Xex[] args, Domain domain)
- {
- object result;
+ private static object progn_clause (Xex[] args, Domain domain)
+ {
+ object result = true;
- if (is_true (args[0].Eval (domain)))
- result = args[1].Eval (domain);
- else
- {
- result = false;
- for (int i = 2; i < args.Length; i++)
- result = args[i].Eval (domain);
- }
- return result;
- }
+ foreach (Xex e in args)
+ result = e.Eval (domain);
+ return result;
+ }
- private static object when_clause (Xex[] args, Domain domain)
- {
- if (! is_true (args[0].Eval (domain)))
- return false;
+ private static object if_clause (Xex[] args, Domain domain)
+ {
+ object result;
- object result = true;
- for (int i = 1; i < args.Length; i++)
- result = args[i].Eval (domain);
- return result;
- }
+ if (is_true (args[0].Eval (domain)))
+ result = args[1].Eval (domain);
+ else
+ {
+ result = false;
+ for (int i = 2; i < args.Length; i++)
+ result = args[i].Eval (domain);
+ }
+ return result;
+ }
- private static object while_clause (Xex[] args, Domain domain)
- {
- while (is_true (args[0].Eval (domain)))
- for (int i = 1; i < args.Length; i++)
- args[i].Eval (domain);
+ private static object when_clause (Xex[] args, Domain domain)
+ {
+ if (! is_true (args[0].Eval (domain)))
return false;
- }
+
+ object result = true;
+ for (int i = 1; i < args.Length; i++)
+ result = args[i].Eval (domain);
+ return result;
+ }
+
+ private static object while_clause (Xex[] args, Domain domain)
+ {
+ while (is_true (args[0].Eval (domain)))
+ for (int i = 1; i < args.Length; i++)
+ args[i].Eval (domain);
+ return false;
+ }
// FUNCALL: function != null
// VARREF: function == null, args[0] = DIRECT-SYMBOL
this.val = val;
}
- private static Xex macro_expand (Xex[] bindings, Name[] args, Xex e)
+ internal static int parse_integer (string str)
{
- Xex xex;
+ int len = str.Length;
+ bool negative = false;
+
+ if (len <= 1)
+ return (len == 0 ? 0 : str[0] - '0');
+
+ int c = str[0];
+ int i;
- if (e.function != null)
+ if (c == '0' && str[1] == 'x')
{
- xex = new Xex ();
- xex.function = e.function;
- xex.args = new Xex[e.args.Length];
- for (int i = e.args.Length - 1; i >= 0; i--)
- xex.args[i] = macro_expand (bindings, args, e.args[i]);
+ i = 0;
+ for (int idx = 2; idx < len; idx++)
+ {
+ c = str[idx];
+ if (c < '0')
+ break;
+ else if (c <= '9')
+ i = i * 16 + (c - '0');
+ else if (c < 'A')
+ break;
+ else if (c <= 'F')
+ i = i * 16 + (c - 'A');
+ else if (c < 'a')
+ break;
+ else if (c <= 'f')
+ i = i * 16 + (c - 'a');
+ else
+ break;
+ }
+ return i;
}
- else if (e.args != null)
+ if (c == '-')
+ negative = true;
+ i = c - '0';
+ for (int idx = 1; idx < len; idx++)
{
- xex = new Xex ();
- Name name = (Name) e.args[0].val;
- for (int i = args.Length - 1; i >= 0; i--)
- if (args[i] == name)
- return bindings[i];
- xex.function = null;
- xex.args = new Xex[1];
- xex.args[0] = e.args[0];
+ c = str[idx];
+ if (c < '0' || c > '9')
+ break;
+ i = i * 10 + (c - '0');
}
- else
+ return negative ? - i : i;
+ }
+
+ private int pre_parse (XmlNodeList nlist, Domain domain)
+ {
+ int len = 0;
+ foreach (XmlNode node in nlist)
+ {
+ if (node.Name == Ndefun)
+ domain.RegisterFunction (node);
+ else if (node.Name == Ndefvar)
+ domain.Defvar ((Name) node.Attributes[0].Value, node.FirstChild);
+ else
+ len++;
+ }
+ return len;
+ }
+
+ private void post_parse (XmlNodeList nlist, Domain domain)
+ {
+ for (int i = 0, j = 0; i < nlist.Count; i++)
{
- xex = e;
+ XmlNode node = nlist[i];
+
+ if (node.Name == Ndefun)
+ domain.Defun (node);
+ else if (node.Name != Ndefvar)
+ args[j++] = new Xex (node, domain);
}
- return xex;
}
- // EXPR = SYMBOL | MTEXT | INTEGER | FUNCALL | PROGN
- // FUNCALL = '(' SYMBOL EXPR* ')'
- // PROGN = '(' EXPR * ')'
- public Xex (XmlNode node, Domain domain)
+ private void Setup (XmlNode node, Domain domain)
{
Name name = node.Name;
if (name == Nconst)
{
- Name type = node.Attributes["type"].Value;
+ Name type = node.Attributes[Ntype].Value;
if (type == Ninteger)
val = parse_integer (node.InnerText);
else if (name == Nvariable)
{
args = new Xex[1];
- args[0] = new Xex (node.Attributes[0]);
+ args[0] = new Xex ((Name) node.Attributes[0].Value);
}
else
{
- bool is_macro = false;
-
if (name == Nfuncall)
- {
- name = node.Attributes[0].Value;
- if (Nmname == node.Attributes[0].Name)
- is_macro = true;
- }
+ name = node.Attributes[0].Value;
function = domain.GetFunc (name);
XmlNodeList nlist = node.ChildNodes;
|| (function.max_arg >= 0 && nargs > function.max_arg))
throw new Exception ("Invalid number of arguments to: "
+ name + " " + nargs);
+ nargs = pre_parse (nlist, domain);
args = new Xex[nargs];
- for (int i = 0; i < nargs; i++)
- args[i] = new Xex (nlist[i]);
-
- if (is_macro)
- {
- Function.Lambda lambda = function.lambda;
- Xex[] body = lambda.body;
- int len = body.Length;
- Xex[] newargs = new Xex[len];
-
- for (int i = 0; i < len; i++)
- newargs[i] = macro_expand (args, lambda.args, body[i]);
- function = Fprogn;
- args = newargs;
- }
+ post_parse (nlist, domain);
}
}
- private int parse_integer (string str)
+ public Xex (string url, Domain domain)
{
- int len = str.Length;
- bool negative = false;
+ XmlDocument doc = new XmlDocument (Name.Table);
+ XmlNode node;
- if (len <= 1)
- return (len == 0 ? 0 : str[0]);
-
- int c = str[0];
- int i;
-
- if (c == '0' && str[1] == 'x')
+ using (XmlTextReader reader = new XmlTextReader (url, Name.Table))
{
- i = 0;
- for (int idx = 2; idx < len; idx++)
- {
- c = str[idx];
- if (c < '0')
- break;
- else if (c <= '9')
- i = i * 16 + c;
- else if (c < 'A')
- break;
- else if (c <= 'F')
- i = i * 16 + (c - 'A');
- else if (c < 'a')
- break;
- else if (c <= 'f')
- i = i * 16 + (c - 'a');
- else
- break;
- }
- return i;
- }
- if (c == '-')
- negative = true;
- i = c;
- for (int idx = 1; idx < len; idx++)
- {
- c = str[idx];
- if (c < '0' || c > '9')
- break;
- i = i * 10 + (c - '0');
+ do {
+ reader.Read ();
+ } while (reader.NodeType != XmlNodeType.None
+ && (reader.NodeType != XmlNodeType.Element
+ || Nexpr != reader.Name));
+ if (reader.NodeType == XmlNodeType.None)
+ throw new Exception ("Node <expr> not found");
+ node = doc.ReadNode (reader);
}
- return negative ? - i : i;
+
+ Setup (node, domain);
+ }
+
+ // EXPR = SYMBOL | MTEXT | INTEGER | FUNCALL | PROGN
+ // FUNCALL = '(' SYMBOL EXPR* ')'
+ // PROGN = '(' EXPR * ')'
+ public Xex (XmlNode node, Domain domain)
+ {
+ Setup (node, domain);
}
public object Eval (Domain domain)
}
else if (args != null)
{
- str = (string) args[0].val;
+ str = (Name) args[0].val;
}
else if (val != null)
{
projects / m17n / m17n-lib-cs.git / blobdiff