public string Visit(FunctionCallExpression call)
{
var codeWriter = new XzaarCodeWriter();
var indent = isInsideExpression ? 0 : currentIndent;
var instance = call.GetInstance();
if (instance != null)
{
codeWriter.Write(Visit(instance));
codeWriter.Write("." + call.MethodName + "(");
}
else
{
codeWriter.Write(call.MethodName + "(", indent);
}
for (int index = 0; index < call.Arguments.Count; index++)
{
var arg = call.Arguments[index];
codeWriter.Write(Visit(arg));
if (index + 1 < call.ArgumentCount)
{
codeWriter.Write(", ");
}
}
codeWriter.Write(")");
if (!isInsideExpression)
{
codeWriter.NewLine();
}
return(codeWriter.ToString());
}
public string Visit(MemberExpression access)
{
var codeWriter = new XzaarCodeWriter();
if (access.Member != null)
{
codeWriter.Write(access.Member.Name);
return(null);
}
var paramExpr = access.Expression as ParameterExpression;
if (paramExpr != null)
{
codeWriter.Write(paramExpr.Name);
if (access.ArrayIndex != null)
{
codeWriter.Write("[");
codeWriter.Write(Visit(access.ArrayIndex));
codeWriter.Write("]");
}
}
return(codeWriter.ToString());
}
public string Visit(ForExpression @for)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("for (", currentIndent);
insideExpressionCount++;
codeWriter.Write(Visit(@for.Initiator));
insideExpressionCount--;
codeWriter.Write("; ");
insideExpressionCount++;
codeWriter.Write(Visit(@for.Test));
insideExpressionCount--;
codeWriter.Write("; ");
insideExpressionCount++;
codeWriter.Write(Visit(@for.Incrementor));
insideExpressionCount--;
codeWriter.Write(") {");
codeWriter.NewLine();
currentIndent++;
codeWriter.Write(Visit(@for.Body));
currentIndent--;
codeWriter.Write("}", currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(ConstantExpression value)
{
var codeWriter = new XzaarCodeWriter();
if (value.Type.IsArray)
{
if (value.Value == null)
{
codeWriter.Write("[]");
}
else
{
codeWriter.Write(value.Value);
}
}
else if (value.Type == XzaarBaseTypes.Number || value.Type == XzaarBaseTypes.Boolean)
{
codeWriter.Write(value.Value.ToString());
}
else
{
codeWriter.Write("\"" + value.Value + "\"");
}
return(codeWriter.GetSourceCode());
}
public string Visit(UnaryExpression unary)
{
var codeWriter = new XzaarCodeWriter();
var indent = isInsideExpression ? 0 : currentIndent;
switch (unary.NodeType)
{
case XzaarExpressionType.PostIncrementAssign:
codeWriter.Write("", indent);
codeWriter.Write(Visit(unary.Item));
codeWriter.Write("++");
break;
case XzaarExpressionType.PostDecrementAssign:
codeWriter.Write("", indent);
codeWriter.Write(Visit(unary.Item));
codeWriter.Write("--");
break;
case XzaarExpressionType.Increment:
codeWriter.Write("++", indent);
codeWriter.Write(Visit(unary.Item));
break;
case XzaarExpressionType.Decrement:
codeWriter.Write("--", indent);
codeWriter.Write(Visit(unary.Item));
break;
}
if (!isInsideExpression)
{
codeWriter.NewLine();
}
return(codeWriter.ToString());
}
public string Visit(FunctionExpression function)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("fn " + function.Name + "(", currentIndent);
codeWriter.Write(string.Join(", ", function.GetParameters().Select(v => v.Type.Name + " " + v.Name).ToArray()));
codeWriter.Write(") ");
if (function.ReturnType.Name != "void")
{
codeWriter.Write("-> " + function.ReturnType.Name + " ");
}
codeWriter.Write("{");
codeWriter.NewLine();
var body = function.GetBody();
if (body != null)
{
currentIndent++;
codeWriter.Write(Visit(body));
currentIndent--;
}
codeWriter.Write("}", currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(ParameterExpression parameter)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write(parameter.Name);
return(codeWriter.ToString());
}
public string Visit(ConditionalExpression conditional)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("if (", currentIndent);
insideExpressionCount++;
codeWriter.Write(Visit(conditional.Test));
insideExpressionCount--;
codeWriter.Write(") { ");
codeWriter.NewLine();
if (conditional.IfTrue != null)
{
currentIndent++;
codeWriter.Write(Visit(conditional.IfTrue));
currentIndent--;
}
codeWriter.Write("}", currentIndent);
codeWriter.NewLine();
if (conditional.IfFalse != null && !conditional.IfFalse.IsEmpty())
{
codeWriter.Write("else {", currentIndent);
codeWriter.NewLine();
currentIndent++;
codeWriter.Write(Visit(conditional.IfFalse));
currentIndent--;
codeWriter.Write("}", currentIndent);
codeWriter.NewLine();
}
return(codeWriter.ToString());
}
private string VisitGoto(GotoExpression @goto)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("goto " + @goto.Target?.Name, currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(FieldExpression node)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write(node.FieldType + " " + node.Name, currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(LabelExpression label)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write(@label.Target?.Name + ":", currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
private string VisitBreak(GotoExpression @goto)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("break", currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(CreateStructExpression node)
{
var codeWriter = new XzaarCodeWriter();
var indent = isInsideExpression ? 0 : currentIndent;
codeWriter.Write(node.StructName, indent);
if (!isInsideExpression)
{
codeWriter.NewLine();
}
return(codeWriter.ToString());
}
private string VisitReturn(GotoExpression @goto)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("return", currentIndent);
if (@goto.Value != null)
{
codeWriter.Write(" ");
insideExpressionCount++;
codeWriter.Write(Visit(@goto.Value));
insideExpressionCount--;
}
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(LoopExpression loop)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("loop {", currentIndent);
codeWriter.NewLine();
if (loop.Body != null)
{
currentIndent++;
codeWriter.Write(Visit(loop.Body));
currentIndent--;
}
codeWriter.Write("}", currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(StructExpression node)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("struct " + node.Name + " {", currentIndent);
codeWriter.NewLine();
currentIndent++;
foreach (var field in node.Fields)
{
codeWriter.Write(Visit(field));
}
currentIndent--;
codeWriter.Write("}", currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(DoWhileExpression doWhile)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("do {", currentIndent);
codeWriter.NewLine();
currentIndent++;
codeWriter.Write(Visit(doWhile.Body));
currentIndent--;
codeWriter.Write("} while(", currentIndent);
insideExpressionCount++;
codeWriter.Write(Visit(doWhile.Test));
insideExpressionCount--;
codeWriter.Write(")");
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(VariableDefinitionExpression definedVariable)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("var " + definedVariable.Name, isInsideExpression ? 0 : currentIndent);
if (definedVariable.AssignmentExpression != null)
{
codeWriter.Write(" = ");
insideExpressionCount++;
codeWriter.Write(Visit(definedVariable.AssignmentExpression));
insideExpressionCount--;
}
if (!isInsideExpression)
{
codeWriter.NewLine();
}
return(codeWriter.ToString());
}
public string Visit(ForEachExpression @foreach)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("foreach (", currentIndent);
insideExpressionCount++;
codeWriter.Write(Visit(@foreach.Variable));
codeWriter.Write(" in ");
codeWriter.Write(Visit(@foreach.Collection));
insideExpressionCount--;
codeWriter.Write(") {");
codeWriter.NewLine();
currentIndent++;
codeWriter.Write(Visit(@foreach.Body));
currentIndent--;
codeWriter.Write("}", currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(SwitchExpression match)
{
var codeWriter = new XzaarCodeWriter();
codeWriter.Write("switch (", currentIndent);
insideExpressionCount++;
codeWriter.Write(Visit(match.Value));
insideExpressionCount--;
codeWriter.Write(") {");
codeWriter.NewLine();
currentIndent++;
foreach (var c in match.Cases)
{
codeWriter.Write(Visit(c));
}
currentIndent--;
codeWriter.Write("}", currentIndent);
codeWriter.NewLine();
return(codeWriter.ToString());
}
public string Visit(SwitchCaseExpression matchCase)
{
var codeWriter = new XzaarCodeWriter();
if (matchCase.IsDefaultCase)
{
codeWriter.Write("default:", currentIndent);
}
else
{
insideExpressionCount++;
codeWriter.Write("case ", currentIndent);
codeWriter.Write(Visit(matchCase.Match));
codeWriter.Write(":");
insideExpressionCount--;
}
codeWriter.NewLine();
currentIndent++;
codeWriter.Write(Visit(matchCase.Body));
currentIndent--;
return(codeWriter.ToString());
}
public string Visit(BinaryExpression binaryOp)
{
var codeWriter = new XzaarCodeWriter();
string op = GetBinaryOperator(binaryOp.NodeType);
if (!isInsideExpression && noIndent == 0)
{
codeWriter.Write("", currentIndent);
}
noNewLine = true;
codeWriter.Write(Visit(binaryOp.Left));
noNewLine = false;
codeWriter.Write(" " + op + " ");
noIndent++;
codeWriter.Write(Visit(binaryOp.Right));
noIndent--;
if (!isInsideExpression && noIndent == 0)
{
codeWriter.NewLine();
}
return(codeWriter.ToString());
}
public XzaarCodeGeneratorVisitor()
{
codeWriter = new XzaarCodeWriter();
}
public string Visit(MemberAccessChainExpression node)
{
var codeWriter = new XzaarCodeWriter();
var chain = new List <string>();
var left = node.Left;
var isLeft = true;
while (left != null)
{
var leftValue = "";
var wasChain = false;
var chainExpr = left as MemberAccessChainExpression;
if (chainExpr != null)
{
left = chainExpr.Right;
wasChain = true;
}
var mb = left as MemberExpression;
if (mb != null && mb.Expression != null)
{
string arrayIndexer = "";
if (mb.ArrayIndex != null)
{
arrayIndexer = "[" + Visit(mb.ArrayIndex) + "]";
}
var added = false;
var f = mb.Expression as FieldExpression;
var p = mb.Expression as ParameterExpression;
if (p != null)
{
if (isLeft)
{
chain.Insert(0, p.Name + arrayIndexer);
}
else
{
chain.Add(p.Name + arrayIndexer);
}
added = true;
}
if (f != null)
{
if (isLeft)
{
chain.Insert(0, f.Name + arrayIndexer);
}
else
{
chain.Add(f.Name + arrayIndexer);
}
added = true;
}
if (added)
{
if (wasChain && chainExpr.Left != null)
{
left = chainExpr.Left;
}
else
{
if (!isLeft)
{
break;
}
left = node.Right;
isLeft = false;
}
continue;
}
}
var fnc = left as FunctionCallExpression;
if (fnc == null)
{
break;
}
var fValue = Visit(fnc);
if (isLeft)
{
chain.Insert(0, fValue);
}
else
{
chain.Add(fValue);
}
// fnc.
// chain.Insert(0, );
}
var indent = isInsideExpression ? 0 : currentIndent;
codeWriter.Write(string.Join(".", chain.ToArray()), indent);
if (!isInsideExpression && !noNewLine)
{
codeWriter.NewLine();
}
return(codeWriter.ToString());
}
