private VarItem ImportVar(IBranch varBranch, bool native)
{
// protect ourselves from recursion
if (varBranch == FormulaBeingEdited)
{
return null;
}
else
{
Func<String, String> attr = s => varBranch.GetValue(s) == null ? "" : varBranch.GetValue(s).ContentString;
_varNames.Add(varBranch.VPath, attr("name"));
_varTypes.Add(varBranch.VPath, attr("type"));
var @newitem = new VarItem(varBranch, _varNames[varBranch.VPath], varBranch.VPath.ToElfIdentifier());
if (native)
{
_native.Add(@newitem);
}
else
{
if (new VariableExpression(@newitem.InternalName).PieType() == PieType.Var)
{
_externalVars.Add(@newitem);
}
else
{
_externalNodes.Add(@newitem);
}
}
return @newitem;
}
}
public TillerIntegrationContext(IBranch common, IBranch activeParticle, Func<IBranch> branchSelector, Func<IBranch> nodeSelector)
{
Common = common;
FormulaBeingEdited = activeParticle;
BranchSelector = branchSelector;
NodeSelector = nodeSelector;
var svds = Enumerable.Empty<IBranch>();
if (FormulaBeingEdited != null)
{
var particle = FormulaBeingEdited.Parent.Parent;
var partDecl = particle.GetBranches().SingleOrDefault(b => b.Name == "_sourceValueDeclarations");
var partFlae = particle.GetBranches().SingleOrDefault(b => b.Name == "_formulaDeclarations");
if (partFlae != null) svds = partFlae.AsArray().Concat(svds);
if (partDecl != null) svds = partDecl.AsArray().Concat(svds);
}
Func<IBranch, String> type = b => b.GetValue("type") == null ? null : b.GetValue("type").ContentString;
svds.Distinct().SelectMany(svd => svd.GetBranches())
.Where(var => var != FormulaBeingEdited && type(var) != "text" && type(var) != "string")
.ForEach(var => ImportVar(var));
var elf = activeParticle.GetValue("elfCode") == null ? null : activeParticle.GetValue("elfCode").ContentString;
if (elf != null) elf.RenderLightElfAsPublicText(this); // as a side effect this will fill in the externals
}
private static Expression ExpandRhs(IBranch b, IVault repository, List<Expression> stack, Dictionary<String, IBranch> nodes)
{
var elf = b.GetValue("elfCode").ContentString.ToCanonicalElf();
var script = (Script)new ElfAstBuilder(elf).BuildAst();
var assign = (AssignmentExpression)((ExpressionStatement)
script.Classes.Single().Funcs.Single().Body.Statements.Single()).Expression;
var rhs = assign.Expression;
if (stack.Contains(rhs))
{
throw new EvalStackOverflowException();
}
else
{
stack.Add(rhs);
return Expand(rhs, b.Vault, repository, stack, nodes);
}
}
public object Eval(IBranch b, string childScript)
{
try
{
if (!Cache.ContainsKey(b.VPath))
{
if (b.GetOrCreateValue("declarationType", "source").ContentString == "source")
{
String val;
IValue v;
val = (v = b.GetValue("valueForTesting")) == null ? "" : v.ContentString;
if (string.IsNullOrEmpty(val))
{
var repositoryVal = (v = b.GetValue("repositoryValue")) == null ? null : v.ContentString;
if (!string.IsNullOrEmpty(repositoryVal))
{
val = Repository.GetValue(repositoryVal).ContentString;
}
}
var type = (v = b.GetValue("type")) == null ? "string" : v.ContentString;
var script = String.Format("'[[{0}]]{1}'", type, val);
Cache.Add(b.VPath, EvalScript(script));
}
else
{
if (NodesInProgress.Contains(b.VPath))
{
throw new EvalStackOverflowException(b, NodesInProgress.Select(vp => Vault.GetBranch(vp)));
}
else
{
object result;
var old = NodeInProgress;
NodeInProgress = b;
NodesInProgress.Add(b.VPath);
try
{
var source = b.GetValue("elfCode").ContentString;
if (!string.IsNullOrEmpty(source))
{
IBranch conditions = null;
// in case of a conditional node, we replace its formula body with the corresponding body of checked child node
if (_checkedNodes != null && (conditions = b.Parent.Parent.GetBranch("_conditions")) != null && conditions.GetBranches().Length > 0)
{
var index = 0;
if ((index = source.IndexOf('=')) > 0) // is subject to replace?
{
// look for the very first checked child
foreach (var child in b.Parent.Parent.GetBranches())
{
if (!_checkedNodes.Contains(child.Id)) continue;
var varName = source.Substring(0, index);
var formulasBranch = child.GetBranch("_formulaDeclarations");
if (formulasBranch == null) continue;
foreach (var formula in formulasBranch.GetBranches())
{
var formulaBody = "";
// look for the very first formula body having $varName within
if (string.IsNullOrEmpty(formulaBody = formula.GetValue("elfCode").ContentString) || formulaBody.IndexOf(varName) < 0) continue;
var lines = formulaBody.Split('\n');
lines[lines.Length - 1] = "ret " + lines[lines.Length - 1];
source = string.Join(Environment.NewLine, lines);
break;
}
break;
}
}
}
if (!string.IsNullOrEmpty(childScript))
source = string.Concat(source, Environment.NewLine, childScript);
}
result = EvalScript(source);
}
finally
{
NodeInProgress = old;
NodesInProgress.Remove(b.VPath);
}
Cache.Add(b.VPath, result);
}
}
}
return Cache[b.VPath];
}
catch (BaseEvalException)
{
throw;
}
catch (ErroneousScriptRuntimeException esex)
{
if (esex.Type == ElfExceptionType.OperandsDontSuitMethod)
{
throw new ArgsDontSuitTheFunctionException(b, esex.Thread.RuntimeContext.PendingClrCall, esex);
}
else
{
throw new UnexpectedErrorException(b, esex);
}
}
catch (Exception ex)
{
if (ex.InnerException is FormatException)
{
throw new BadFormatOfSerializedStringException(b, ex);
}
else
{
throw new UnexpectedErrorException(b, ex);
}
}
}
