public VariableScope(LocalVariable variable, int start, VariableScope parent)
{
Variable = variable;
Start = start;
Parent = parent;
}
internal LocalVariable AddClosureVariable(ParameterExpression variable) {
if (_closureVariables == null) {
_closureVariables = new Dictionary<ParameterExpression, LocalVariable>();
}
LocalVariable result = new LocalVariable(_closureVariables.Count, true, false);
_closureVariables.Add(variable, result);
return result;
}
public VariableScope(LocalVariable variable, int start, VariableScope parent) {
Variable = variable;
Start = start;
Parent = parent;
}
public LocalDefinition DefineLocal(ParameterExpression variable, int start) {
ContractUtils.RequiresNotNull(variable, "variable");
ContractUtils.Requires(start >= 0, "start", "start must be positive");
LocalVariable result = new LocalVariable(_localCount++, false, false);
_maxLocalCount = System.Math.Max(_localCount, _maxLocalCount);
VariableScope existing, newScope;
if (_variables.TryGetValue(variable, out existing)) {
newScope = new VariableScope(result, start, existing);
if (existing.ChildScopes == null) {
existing.ChildScopes = new List<VariableScope>();
}
existing.ChildScopes.Add(newScope);
} else {
newScope = new VariableScope(result, start, null);
}
_variables[variable] = newScope;
return new LocalDefinition(result.Index, variable);
}
public bool TryGetLocalOrClosure(ParameterExpression var, out LocalVariable local) {
VariableScope scope;
if (_variables.TryGetValue(var, out scope)) {
local = scope.Variable;
return true;
}
if (_closureVariables != null && _closureVariables.TryGetValue(var, out local)) {
return true;
}
local = null;
return false;
}
internal LocalDefinition DefineLocal(ParameterExpression variable, int start) {
LocalVariable result = new LocalVariable(_localCount++, false, false);
_maxLocalCount = System.Math.Max(_localCount, _maxLocalCount);
VariableScope existing, newScope;
if (_variables.TryGetValue(variable, out existing)) {
newScope = new VariableScope(result, start, existing);
if (existing.ChildScopes == null) {
existing.ChildScopes = new List<VariableScope>();
}
existing.ChildScopes.Add(newScope);
} else {
newScope = new VariableScope(result, start, null);
}
_variables[variable] = newScope;
return new LocalDefinition(result.Index, variable);
}
internal void Box(ParameterExpression variable) {
LocalVariable local = _variables[variable];
Debug.Assert(!local.IsBoxed && !local.InClosure);
_variables[variable] = new LocalVariable(local.Index, false, true);
_boxedCount++;
}
public LocalVariable DefineLocal(ParameterExpression variable) {
// the current variable definition shadows the existing one:
if (_variables.ContainsKey(variable)) {
throw new NotSupportedException("Variable shadowing not supported");
}
LocalVariable result = new LocalVariable(_localCount++, false, false);
_variables.Add(variable, result);
return result;
}
internal LocalVariable AddClosureVariable(ParameterExpression variable) {
LocalVariable result = new LocalVariable(_closureSize++, true, false);
_variables.Add(variable, result);
return result;
}
public bool TryGetLocal(ParameterExpression var, out LocalVariable local) {
return _variables.TryGetValue(var, out local);
}