public LambdaExpression CreateLambda(Type from, Type to)
{
var fromParameters = from.GetTypeInfo().GenericTypeArguments;
var toParameters = to.GetTypeInfo().GenericTypeArguments;
var converters = fromParameters
.Zip(toParameters, (f, t) => Ref.GetLambda(f, t))
.ToArray();
var input = Ex.Parameter(from, "input");
var res = toParameters.Select(t => Ex.Parameter(typeof(ConversionResult <>).MakeGenericType(t))).ToArray();
var conversion = res.Select((r, i) =>
Ex.Assign(res[i], converters[i].ApplyTo(Ex.PropertyOrField(input, $"Item{i + 1}")))).ToArray();
var conversionSuccesful = Enumerable.Aggregate(res, (Ex)Ex.Constant(true),
(c, p) => Ex.MakeBinary(Et.AndAlso, c, Ex.Property(p, nameof(IConversionResult.IsSuccessful))));
var block = Ex.Block(res,
Ex.Block(conversion),
Ex.Condition(conversionSuccesful,
Result(to,
Ex.Call(Creator(to), Enumerable.Select(res, p => Ex.Property(p, nameof(IConversionResult.Result))))),
NoResult(to)));
var lambda = Ex.Lambda(block, input);
return(lambda);
}
public static BlockExpression RotateLerp(Ex target, Ex source, TExArgCtx bpi, bool isRate, bool isTrue, Ex rate)
{
if (isRate)
{
rate = rate.Mul(M.degRad);
}
if (isTrue)
{
rate = rate.Mul(ETime.FRAME_TIME);
}
TExV2 v = TExV2.Variable();
TEx <float> ang = ExUtils.VFloat();
Expression[] exprs = new Expression[3];
exprs[1] = ang.Is(RadDiff(target, v));
if (isTrue)
{
var key = bpi.Ctx.NameWithSuffix("_RotateLerpKey");
exprs[0] = v.Is(
Ex.Condition(FiringCtx.Contains <Vector2>(bpi, key),
FiringCtx.GetValue <Vector2>(bpi, key),
FiringCtx.SetValue <Vector2>(bpi, key, source)
));
exprs[2] =
FiringCtx.SetValue <Vector2>(bpi, key, RotateRad(isRate ? (Ex)Limit(rate, ang) : ang.Mul(rate), v));
}
else
{
exprs[0] = v.Is(source);
exprs[2] = RotateRad(isRate ?
(Ex)Limit(bpi.t.Mul(rate), ang) :
ang.Mul(Min(bpi.t.Mul(rate), E1)), v);
}
return(Ex.Block(new ParameterExpression[] { v, ang }, exprs));
}
public void TestAssign()
{
var x = VF("x");
var yi = VF("y");
var zi = VF("z");
var ex = x.Is(Ex.Block(new[] { yi },
yi.Is(ExC(5f)),
yi.Add(x)
));
DebugsTo(ex, "(x=((y=5);\n(y+x);))");
LinDebugsTo(ex, "((y=5);\n(x=(y+x));)");
AreEqual(11f, Compile1(ex.Linearize(), x)(6));
var ex2 = Ex.Block(
x.Is(Ex.Block(new[] { yi },
yi.Is(ExC(5f)),
yi.Add(x)
).Add(Ex.Block(new[] { zi },
zi.Is(x),
zi.Mul(2f)
))),
x.Add(2f)
);
DebugsTo(ex2, "((x=(((y=5);\n(y+x);)+((z=x);\n(z*2);)));\n(x+2);)");
LinDebugsTo(ex2, @"((y=5);
(z=x);
(x=((y+x)+(z*2)));
(x+2);)");
}
internal MetaObject /*!*/ CreateMetaObject(MetaObjectBinder /*!*/ action, MetaObject /*!*/[] /*!*/ siteArgs)
{
var expr = _error ? Ast.Throw(_result) : _result;
Restrictions restrictions;
if (_condition != null)
{
var deferral = action.Defer(siteArgs);
expr = Ast.Condition(_condition, AstUtils.Convert(expr, typeof(object)), deferral.Expression);
restrictions = deferral.Restrictions;
}
else
{
restrictions = Restrictions.Empty;
}
if (_temps != null)
{
expr = Ast.Block(_temps, expr);
}
if (_restriction != null)
{
restrictions = restrictions.Merge(Restrictions.GetExpressionRestriction(_restriction));
}
return(new MetaObject(expr, restrictions));
}
// Generate expression to swap a and b, using t as a temporary.
private static LinqExpr Swap(LinqExpr a, LinqExpr b, LinqExpr t)
{
return(LinqExpr.Block(
LinqExpr.Assign(t, a),
LinqExpr.Assign(a, b),
LinqExpr.Assign(b, t)));
}
public void Factorial()
{
var value = LinqExpression.Parameter(typeof(int), "value");
var result = LinqExpression.Parameter(typeof(int), "result");
var label = LinqExpression.Label(typeof(int), "label");
var one = LinqExpression.Constant(1);
var expression = LinqExpression.Block(
new[] { result },
LinqExpression.Assign(
result,
one),
LinqExpression.Loop(
LinqExpression.Condition(
LinqExpression.GreaterThan(
value,
one),
LinqExpression.MultiplyAssign(
result,
LinqExpression.PostDecrementAssign(
value)),
LinqExpression.Break(
label,
result),
typeof(void)),
label));
ShouldRoundrip(expression);
}
/// <summary>
/// Generates the method's body
/// </summary>
/// <returns></returns>
protected Expr GenerateDeserializationMethodBody()
{
// Generate a tree of BodyExpression.
// We just populate the type token, the member info, and the access expressions
var bodyParts = MakeRootNode();
foreach (var member in Root.Members)
{
if (member.MemberType != MemberType || member.IsReadOnly)
continue;
var node = new TreeNode() {
AccessExpression = MakeRootMemberAccess(member),
TypeToken = member.TypeToken,
MemberToken = member,
};
GenerateTreeNode(node);
bodyParts.Children.Add(node);
}
// Emit candidate read calls.
bodyParts.GenerateReadCalls(this);
var expr = bodyParts.TryUnroll().ToExpression();
var returnType = MakeReturnExpression();
if (returnType != null)
expr = Expr.Block(expr, returnType);
// TODO: See if trying to optimize iterator usages in the generated code outweighs the cost of optimizing
// (It probably doesn't) (except for large files question mark?)
return expr;
}
public static Func <TExArgCtx, TEx <float> > PivotShift <S>(Func <EEx <float>, TEx <float>[], TEx <float> > shifter,
Func <TExArgCtx, TEx <float> > sharpness, Func <TExArgCtx, TEx <float> > pivot,
Func <TExArgCtx, TEx <float> > f1, Func <TExArgCtx, TEx <float> > f2, string pivotVar) where S : TEx, new()
{
if (pivotVar == "t" || pivotVar == "p" || pivotVar == "x")
{
return(t => {
var pivotT = t.MakeCopyForType <S>(out var currEx, out var pivotEx);
return Ex.Block(new ParameterExpression[] { pivotEx },
Ex.Assign(pivotEx, currEx),
Ex.Assign(pivotVar.Into <Func <TExArgCtx, TEx <float> > >()(pivotT), pivot(t)),
shifter(sharpness(t), new TEx <float>[] { f1(t), f1(pivotT).Add(f2(t).Sub(f2(pivotT))) })
);
});
}
else if (pivotVar[0] == Parser.SM_REF_KEY_C)
{
var let = pivotVar.Substring(1);
return(t => shifter(sharpness(t), new TEx <float>[] {
f1(t), f2(t).Add(
ReflectEx.Let <float, float>(let, pivot, () => f1(t).Sub(f2(t)), t)
)
}));
}
else
{
throw new Exception($"{pivotVar} is not a valid pivoting target.");
}
}
public LambdaExpression CreateLambda(Type from, Type to)
{
var toParameters = to.GetTypeInfo().GenericTypeArguments;
var tupa = toParameters.Length;
var input = Ex.Parameter(from, "input");
var converters = toParameters.Select(p => Ref.GetLambda(typeof(string), p)).ToArray();
var res = toParameters.Select(p => Ex.Parameter(typeof(ConversionResult <>).MakeGenericType(p))).ToArray();
var end = Ex.Label(typeof(ConversionResult <>).MakeGenericType(to), "end");
var indexer = typeof(string[]).GetTypeInfo().GetDeclaredProperty("Item");
var split = Ex.Parameter(typeof(string[]), "split");
var conversion = Ex.Block(converters.Select((c, i) =>
Ex.Block(
Ex.Assign(res[i],
c.ApplyTo(Ex.MakeIndex(split, indexer, new[] { Ex.MakeBinary(Et.Add, Ex.Constant(i), Ex.MakeBinary(Et.Subtract, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa))) }))),
Ex.IfThen(Ex.Not(Ex.Property(res[i], nameof(IConversionResult.IsSuccessful))),
Ex.Goto(end, NoResult(to))))));
var block = Ex.Block(new[] { split },
Ex.Assign(split, Ex.Call(input, nameof(string.Split), Type.EmptyTypes, _separator)),
Ex.Condition(Ex.MakeBinary(Et.LessThan, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa)),
NoResult(to),
Ex.Block(res,
Ex.IfThen(Ex.MakeBinary(Et.GreaterThan, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa)),
Ex.Assign(Ex.ArrayAccess(split, Ex.MakeBinary(Et.Subtract, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa))),
Ex.Call(typeof(string), nameof(string.Join), Type.EmptyTypes, _separatorString,
Ex.Call(typeof(Enumerable), nameof(Enumerable.Take), new[] { typeof(string) }, split,
Ex.MakeBinary(Et.Add, Ex.Constant(1), Ex.MakeBinary(Et.Subtract, Ex.Property(split, nameof(Array.Length)), Ex.Constant(tupa))))))),
conversion,
Ex.Label(end, Result(to, Ex.Call(Creator(to), res.Select(r => Ex.Property(r, nameof(IConversionResult.Result)))))))));
var lambda = Ex.Lambda(block, input);
return(lambda);
}
/// <summary>
/// Takes current result and wraps it into try-filter(MethodUnwinder)-finally block that ensures correct "break" behavior for
/// Ruby method calls with a block given in arguments.
///
/// Sets up a RFC frame similarly to MethodDeclaration.
/// </summary>
internal static void ApplyBlockFlowHandlingInternal(MetaObjectBuilder /*!*/ metaBuilder, CallArguments /*!*/ args)
{
// TODO (improvement):
// We don't special case null block here, although we could (we would need a test for that then).
// We could also statically know (via call-site flag) that the current method is not a proc-converter (passed by ref),
// which would make such calls faster.
if (metaBuilder.Error || !args.Signature.HasBlock)
{
return;
}
Expression rfcVariable = metaBuilder.GetTemporary(typeof(RuntimeFlowControl), "#rfc");
ParameterExpression methodUnwinder = metaBuilder.GetTemporary(typeof(MethodUnwinder), "#unwinder");
Expression resultVariable = metaBuilder.GetTemporary(typeof(object), "#result");
metaBuilder.Result = Ast.Block(
// initialize frame (RFC):
Ast.Assign(rfcVariable, Methods.CreateRfcForMethod.OpCall(AstUtils.Convert(args.GetBlockExpression(), typeof(Proc)))),
AstUtils.Try(
Ast.Assign(resultVariable, metaBuilder.Result)
).Filter(methodUnwinder, Ast.Equal(Ast.Field(methodUnwinder, MethodUnwinder.TargetFrameField), rfcVariable),
// return unwinder.ReturnValue;
Ast.Assign(resultVariable, Ast.Field(methodUnwinder, MethodUnwinder.ReturnValueField))
).Finally(
// we need to mark the RFC dead snce the block might escape and break later:
Ast.Assign(Ast.Field(rfcVariable, RuntimeFlowControl.IsActiveMethodField), Ast.Constant(false))
),
resultVariable
);
}
private Exp CheckIfZero(CompilerState state, Exp expression)
{
if (state == null)
{
throw new Exception();
}
if (expression == null)
{
throw new Exception();
}
if (expression.Type == typeof(int))
{
var constructor = typeof(Exception).GetConstructor(new Type[] { typeof(string) });
return(Exp.Block(
Exp.IfThen(Exp.Equal(expression, Exp.Constant(0)),
Exp.Throw(Exp.New(constructor, Exp.Constant("Division by zero")))),
expression));
}
if (expression.Type == typeof(float))
{
var constructor = typeof(Exception).GetConstructor(new Type[] { typeof(string) });
return(Exp.Block(
Exp.IfThen(Exp.Equal(expression, Exp.Constant(0.0f)),
Exp.Throw(Exp.New(constructor, Exp.Constant("Division by zero")))),
expression));
}
return(expression);
}
/// <summary>
/// For each expression provided, linearize it if necessary, and then linearize the process of combining
/// the expressions by assigning all block results to temporary variables and then using those temporary
/// variables instead of the blocks.
/// </summary>
private Expression Linearize(Func <Expression[], Expression> combiner, params Expression[] pieces)
{
var linearized = pieces.Select(Visit).ToArray();
//Best case!
if (!linearized.Any(ex => ex is BlockExpression))
{
return(combiner(linearized));
}
var prms = new List <ParameterExpression>();
var stmts = new List <Expression>();
var reduced_args = new Expression[linearized.Length];
linearized.ForEachI((i, ex) => {
if (ex is BlockExpression bex)
{
prms.AddRange(bex.Variables);
stmts.AddRange(bex.Expressions.Take(bex.Expressions.Count - 1));
reduced_args[i] = bex.Expressions[bex.Expressions.Count - 1];
}
else
{
reduced_args[i] = ex;
}
});
stmts.Add(combiner(reduced_args));
return(Ex.Block(prms, stmts));
}
private LambdaExpression toDictLambda(Type from, Type to)
{
var valueType = recordCreator.GetValueType(to);
var recType = typeof(IRecord <>).MakeGenericType(valueType);
var set = recType.GetTypeInfo().GetDeclaredMethod(nameof(IRecord <object> .SetValue));
var input = Ex.Parameter(from, "input");
var tmp = Ex.Parameter(typeof(ConversionResult <>).MakeGenericType(valueType), "tmp");
var res = Ex.Parameter(typeof(IDictionary <,>).MakeGenericType(typeof(string), valueType), "res");
var rec = Ex.Parameter(recType, "rec");
var getters = GetReadablePropertiesForType(from);
var converters = getters.Select(g => Ref.GetLambda(g.PropertyType, valueType));
var end = Ex.Label(typeof(ConversionResult <>).MakeGenericType(to));
var block = Ex.Block(new[] { tmp, res, rec },
Ex.Assign(res, Ex.New(GetParameterlessConstructor(to))),
Ex.Assign(rec, recordCreator.Creator(to).ApplyTo(res)),
Ex.IfThen(Ex.MakeBinary(ExpressionType.Equal, rec, Ex.Default(rec.Type)), Ex.Goto(end, NoResult(to))),
Ex.Block(getters.Zip(converters, (g, c) => new { g, c })
.Select(x =>
Ex.Block(
Ex.Assign(tmp, x.c.ApplyTo(Ex.Property(input, x.g))),
Ex.IfThenElse(Ex.Property(tmp, nameof(IConversionResult.IsSuccessful)),
Ex.Call(rec, set, Ex.Constant(x.g.Name), Ex.Property(tmp, nameof(IConversionResult.Result))),
Ex.Goto(end, NoResult(to)))))),
Ex.Label(end, Result(to, Ex.Convert(res, to))));
return(Ex.Lambda(block, input));
}
/// <summary>
/// Invariant: bex is linearized.
/// </summary>
private BlockExpression AssignBlockResultToTemp(BlockExpression bex, ParameterExpression pex)
{
var exprs = bex.Expressions.ToArray();
exprs[exprs.Length - 1] = Ex.Assign(pex, exprs[exprs.Length - 1]);
return(Ex.Block(bex.Variables, exprs));
}
protected override Expression VisitBlock(BlockExpression node)
{
if (node.Expressions.Count == 1 && node.Variables.Count == 0)
{
return(Visit(node.Expressions[0]));
}
var prms = new List <ParameterExpression>();
var stmts = new List <Expression>();
prms.AddRange(node.Variables);
foreach (var ex in node.Expressions)
{
var linearized = Visit(ex);
if (linearized is BlockExpression bex)
{
prms.AddRange(bex.Variables);
stmts.AddRange(bex.Expressions);
}
else
{
stmts.Add(linearized);
}
}
return(Ex.Block(prms, stmts));
}
public Expr ToExpression()
{
var exitLabel = Expr.Label();
var loopBody = Expr.Block(Body.ToExpression(), Expr.PreIncrementAssign(Iterator.ToExpression()));
return(Expr.Loop(Expr.IfThenElse(Expr.LessThan(Iterator.ToExpression(), UpperBound.ToExpression()), loopBody, Expr.Break(exitLabel)), exitLabel));
}
/// <summary>
/// Wrap a position equation around a cylinder.
/// </summary>
/// <param name="radius">Radius of the cylinder</param>
/// <param name="ang0">Starting angle offset (radians) on the cylinder. 0 = z-axis</param>
/// <param name="maxWrap">Maximum angle value (radians) of the wrap. After this, the function will continue along the tangent. Starting offset not included. Absolute value tested.</param>
/// <param name="axisOff">Offset angle (radians) of the axis of the cylinder from the y-axis</param>
/// <param name="position">Position equation</param>
/// <returns></returns>
public static tv3 CylinderWrap(efloat radius, efloat ang0, efloat maxWrap, efloat axisOff, ev2 position) =>
EEx.Resolve(radius, ang0, axisOff, position, (r, a0, axis, _v2) => {
var cs = new TExV2();
var xyd = new TExV2();
var v2 = new TExV2(_v2);
var v3 = new TExV3();
var a = ExUtils.VFloat();
var aRem = ExUtils.VFloat();
var aMax = ExUtils.VFloat();
var a_cs = new TExV2();
var a0_cs = new TExV2();
return(Ex.Block(new[] { v3, cs, xyd, a, aRem, aMax, a_cs, a0_cs },
aMax.Is(maxWrap),
cs.Is(CosSin(axis)),
xyd.Is(ConvertBasis(v2, cs)),
a.Is(xyd.x.Div(r)),
aRem.Is(E0),
Ex.IfThen(Abs(a).GT(aMax), Ex.Block(
Ex.IfThen(a.LT0(), MulAssign(aMax, EN1)),
aRem.Is(a.Sub(aMax)),
a.Is(aMax)
)),
a0_cs.Is(CosSin(a0)),
a_cs.Is(CosSin(a.Add(a0))),
xyd.x.Is(r.Mul(a_cs.y.Sub(a0_cs.y).Add(aRem.Mul(a_cs.x)))),
v3.Is(TP3(DeconvertBasis(xyd, cs))),
v3.z.Is(r.Mul(a_cs.x.Sub(a0_cs.x).Sub(aRem.Mul(a_cs.y)))),
v3
));
});
private static Func <int[], int[]> GenerateCopyExpression()
{
var ctor = typeof(int[]).GetConstructor(new[] { typeof(int) });
var get = typeof(int[]).GetMethod("Get", new[] { typeof(int) });
var set = typeof(int[]).GetMethod("Set", new[] { typeof(int), typeof(int) });
var p1 = Exp.Parameter(typeof(int[]));
var v1 = Exp.Variable(typeof(int[]));
var v2 = Exp.Variable(typeof(int));
var @break = Exp.Label();
var block = Exp.Block(
new[] { v1, v2 },
Exp.Assign(v1, Exp.New(ctor, Exp.Property(p1, "Length"))),
Exp.Assign(v2, Exp.Constant(0)),
Exp.Loop(
Exp.IfThenElse(
Exp.LessThan(v2, Exp.Property(p1, "Length")),
Exp.Block(
Exp.Call(v1, set, v2, Exp.Call(p1, get, v2)),
Exp.AddAssign(v2, Exp.Constant(1))
),
Exp.Break(@break)
),
@break),
v1
);
return(Exp.Lambda <Func <int[], int[]> >(block, new ParameterExpression[] { p1 }).Compile());
}
private LambdaExpression fromEnumerableLambda(Type from)
{
var input = Ex.Parameter(from, "input");
var eType = from.GetTypeInfo().ImplementedInterfaces
.Where(i => i.GenericTypeArguments.Length == 1 && i.GetGenericTypeDefinition() == typeof(IEnumerable <>))
.Select(i => i.GenericTypeArguments[0]).SingleOrDefault()
?? from.GetTypeInfo().GenericTypeArguments[0];
var res = Ex.Parameter(typeof(string), "res");
var result = Ex.Block(new[] { res },
Ex.Assign(res, Ex.Call((from mi in typeof(string).GetTypeInfo().GetDeclaredMethods(nameof(string.Join))
where mi.GetGenericArguments().Length == 1
let par = mi.GetParameters()
where par.Length == 2 &&
par[0].ParameterType == typeof(string) &&
par[1].ParameterType == typeof(IEnumerable <>).MakeGenericType(mi.GetGenericArguments()[0])
select mi).Single().MakeGenericMethod(eType),
Ex.Constant(Separators[0].ToString()), input)),
Ex.Condition(Ex.MakeBinary(Et.Equal, Ex.Property(res, nameof(string.Length)), Ex.Constant(0)),
NoResult(typeof(string)),
Result(typeof(string), res)));
var block = Ex.Condition(Ex.MakeBinary(Et.Equal, input, Ex.Default(from)),
NoResult(typeof(string)),
result);
var lambda = Ex.Lambda(block, input);
return(lambda);
}
public void TestAssign()
{
var x = VF("x");
var y = VF("y");
AreEqual("((y=((2*x)+2));\n(y+(x*2));)", DerivDebug(x, Ex.Block(new[] { y }, Ex.Assign(y, E2.Mul(x).Add(E2)), x.Mul(y))));
}
// Pseudocode:
//string input =>
//{
// R result = 0;
// for (int i = input.Length - 1; i >= 0; i--)
// {
// result <<= 6;
// var m = _invMap[input[i]];
// if (m == 0xff)
// return default(ConversionResult<R>);
// result += m;
// }
// return new ConversionResult<R>(result);
//}
private LambdaExpression fromLambda(Type to)
{
var stringthis = typeof(string).GetTypeInfo().DeclaredProperties.First(p => p.GetIndexParameters().Length == 1 && p.GetIndexParameters()[0].ParameterType == typeof(int));
var input = Ex.Parameter(typeof(string), "input");
var result = Ex.Parameter(to, "result");
var i = Ex.Parameter(typeof(int), "i");
var m = Ex.Parameter(typeof(byte), "m");
var loopstart = Ex.Label("loopstart");
var end = Ex.Label(typeof(ConversionResult <>).MakeGenericType(to), "end");
var loop = Ex.Block(
Ex.Label(loopstart),
Ex.IfThen(Ex.MakeBinary(ExpressionType.LessThan, i, Ex.Constant(0)),
Ex.Goto(end, Result(to, result))),
Ex.LeftShiftAssign(result, Ex.Constant(6)),
Ex.Assign(m, Ex.ArrayIndex(Ex.Constant(_invMap), Ex.Convert(Ex.MakeIndex(input, stringthis, new[] { i }), typeof(int)))),
Ex.IfThen(Ex.MakeBinary(ExpressionType.Equal, m, Ex.Constant((byte)0xff)),
Ex.Goto(end, NoResult(to))),
Ex.AddAssign(result, Ex.Convert(m, result.Type)),
Ex.PostDecrementAssign(i),
Ex.Goto(loopstart));
var block = Ex.Block(new[] { result, i, m },
Ex.Assign(result, Ex.Convert(Ex.Constant(0), to)),
Ex.Assign(i, Ex.MakeBinary(ExpressionType.Subtract, Ex.Property(input, nameof(string.Length)), Ex.Constant(1))),
loop,
Ex.Label(end, NoResult(to)));
return(Ex.Lambda(block, input));
}
public EvaluationCallback Create(Node node)
{
var compilerstate = new CompilerState
{
FunctionState = Exp.Parameter(typeof(Character), "state"),
ErrorVariable = Exp.Parameter(typeof(bool), "error")
};
var result = Make(compilerstate, node);
if (result.Type == typeof(bool))
{
result = ToInteger(result);
}
if (result.Type == typeof(int) || result.Type == typeof(float))
{
// int or float convert to number
var constructor = typeof(Number).GetConstructor(new[] { result.Type });
result = Exp.New(constructor, new[] { result });
// wrap the evaluation in a try..catch
var exceptionParameter = Exp.Parameter(typeof(Exception), "e");
var writeLineMethod = typeof(Console).GetMethod(nameof(Console.WriteLine), new Type[] { typeof(string) });
var toStringMethod = typeof(Exception).GetMethod(nameof(Exception.ToString));
var catchBody = Exp.Block(
Exp.Call(null, writeLineMethod, Exp.Call(exceptionParameter, toStringMethod)),
Exp.Constant(new Number(0)));
result = Exp.TryCatch(result, Exp.Catch(exceptionParameter, catchBody));
// create lambda
var func = Exp.Lambda <Func <Character, bool, Number> >(result, compilerstate.FunctionState, compilerstate.ErrorVariable).Compile();
return(new EvaluationCallback(o => func(o, false)));
}
throw new Exception();
}
public static BlockExpression LaserRotateLerp(Ex target, Ex source, TExArgCtx bpi, Ex rate)
{
var r1 = rate.Mul(ExC(ETime.FRAME_TIME));
TExV2 v = TExV2.Variable();
TEx <float> ang = ExUtils.VFloat();
var dirKey = bpi.Ctx.NameWithSuffix("_LaserRotateLerpDirKey");
var sideKey = bpi.Ctx.NameWithSuffix("_LaserRotateLerpSideKey");
var inter_ang = HighPass(ExC(0.01f), RadDiff(target, v));
return(Ex.Block(new ParameterExpression[] { v, ang },
Ex.Condition(
bpi.FCtxHas <Vector2>(dirKey).And(bpi.t.GT0()),
Ex.Block(
v.Is(bpi.FCtxGet <Vector2>(dirKey)),
ang.Is(Ex.Condition(bpi.FCtxGet <float>(sideKey).LT0(),
RadToNeg(inter_ang),
RadToPos(inter_ang)
)),
bpi.FCtxSet <Vector2>(dirKey, RotateRad(Limit(r1, ang), v))
),
Ex.Block(
v.Is(source),
ang.Is(RadDiff(target, v)),
bpi.FCtxSet <float>(sideKey, Sign(ang)),
bpi.FCtxSet <Vector2>(dirKey, RotateRad(Limit(r1, ang), v))
)
)
));
}
/// <summary>
/// Lerp between two functions. The controller is not clamped.
/// </summary>
/// <param name="zeroBound">Lower bound for lerp controller</param>
/// <param name="oneBound">Upper bound for lerp controller</param>
/// <param name="controller">Lerp controller</param>
/// <param name="f1">First function</param>
/// <param name="f2">Second function</param>
/// <returns></returns>
public static TEx <T> LerpU <T>(efloat zeroBound, efloat oneBound, efloat controller, TEx <T> f1, TEx <T> f2) =>
EEx.Resolve(zeroBound, oneBound, controller, (z, o, c) => {
var rc = VFloat();
return(Ex.Block(new[] { rc },
rc.Is(c.Sub(z).Div(o.Sub(z))),
rc.Mul(f2).Add(rc.Complement().Mul(f1))
));
});
public void ZeroOneRemoval()
{
var x = VF("x");
var ex = Ex.Block(Ex.Add(x, E1), Ex.Add(x, E0), E1.Mul(x), x.Mul(E0), x.Sub(E0), E0.Sub(x));
AreEqual("((x+1);\n(x+0);\n(1*x);\n(x*0);\n(x-0);\n(0-x);)", ex.Debug());
AreEqual("((x+1);\nx;\nx;\n0;\nx;\n(0-x);)", ex.FlatDebug());
}
public void Block_Expressions()
{
var expression =
LinqExpression.Block(
LinqExpression.Default(typeof(string)));
ShouldRoundrip(expression);
}
public void MiscellaneousExpression_Block()
{
var variable = Expr.Variable(typeof(bool));
var block = Expr.Block(Expr.Assign(variable, Expr.Constant(true)), variable);
UnsupportedExpr(Property.Active, active => Expr.Equal(active, block), ExpressionType.Block);
}
/// <summary>
/// Home towards a target location at a fixed speed.
/// </summary>
/// <remarks>
/// Use with StopSampling to home for only a few seconds.
/// <para>This is primarily for use with non-rotational velocity.
/// Rotational use creates: contracting spirals (0,90), circle around player [90], expanding spiral (90,180).</para>
/// </remarks>
/// <param name="speed">Speed</param>
/// <param name="location">Target location</param>
/// <returns></returns>
public static ExTP VHome(ExBPY speed, ExTP location)
{
TExV2 l = new TExV2();
return(bpi => Ex.Block(new ParameterExpression[] { l },
Ex.Assign(l, location(bpi).Sub(bpi.loc)),
l.Mul(Ex.Divide(speed(bpi), Sqrt(Ex.Add(SqrMag(l), EPS))))
));
}
/// <summary>
/// Lerp between two functions with smoothing applied to the controller.
/// </summary>
public static TEx <T> LerpSmooth <T>([LookupMethod] Func <tfloat, tfloat> smoother,
efloat zeroBound, efloat oneBound, efloat controller, TEx <T> f1, TEx <T> f2)
=> EEx.Resolve(zeroBound, oneBound, controller, (z, o, c) => {
var rc = VFloat();
return(Ex.Block(new[] { rc },
rc.Is(smoother(Clamp(z, o, c).Sub(z).Div(o.Sub(z)))),
rc.Mul(f2).Add(rc.Complement().Mul(f1))
));
});
/// <summary>
/// Derive a Vector2 from a Vector3 by dropping the Z-component.
/// </summary>
public static ExTP TP(ExTP3 xyz)
{
var v3 = TExV3.Variable();
return(bpi => Ex.Block(new ParameterExpression[] { v3 },
Ex.Assign(v3, xyz(bpi)),
ExUtils.V2(v3.x, v3.y)
));
}