private ExprParamPair GenChain(PhraseChain stmt, ParamList overlapCandidate)
{
Contract.Requires <ArgumentNullException>(stmt != null);
Contract.Ensures(Contract.Result <ExprParamPair>() != null);
Contract.Ensures(Contract.Result <ExprParamPair>().Expression != null);
Contract.Ensures(Contract.Result <ExprParamPair>().Expression.Type != typeof(void));
ParamList assigned = null;
Expression lastExpr = null;
var exprs = new List <Expression>();
var local = new List <ParameterExpression>();
foreach (var ph in stmt.Phrases)
{
ParameterExpression tmpVar = null;
if (lastExpr != null)
{
tmpVar = Expression.Parameter(lastExpr.Type);
exprs.Add(Expression.Assign(tmpVar, lastExpr));
local.Add(tmpVar);
}
exprs.Add(DebugInfo(ph.Range));
var pair = GenPhrase(ph, tmpVar, assigned, overlapCandidate);
assigned = ParamList.Merge(pair.Parameters, assigned);
lastExpr = pair.Expression;
}
exprs.Add(lastExpr);
return(new ExprParamPair(Expression.Block(local, exprs), assigned));
}
private ExprParamPair GenChain(PhraseChain stmt, ParamList overlapCandidate)
{
Contract.Requires<ArgumentNullException>(stmt != null);
Contract.Ensures(Contract.Result<ExprParamPair>() != null);
Contract.Ensures(Contract.Result<ExprParamPair>().Expression != null);
Contract.Ensures(Contract.Result<ExprParamPair>().Expression.Type != typeof(void));
ParamList assigned = null;
Expression lastExpr = null;
var exprs = new List<Expression>();
var local = new List<ParameterExpression>();
foreach (var ph in stmt.Phrases) {
ParameterExpression tmpVar = null;
if (lastExpr != null) {
tmpVar = Expression.Parameter(lastExpr.Type);
exprs.Add(Expression.Assign(tmpVar, lastExpr));
local.Add(tmpVar);
}
exprs.Add(DebugInfo(ph.Range));
var pair = GenPhrase(ph, tmpVar, assigned, overlapCandidate);
assigned = ParamList.Merge(pair.Parameters, assigned);
lastExpr = pair.Expression;
}
exprs.Add(lastExpr);
return new ExprParamPair(Expression.Block(local, exprs), assigned);
}