private LuaExpressionSyntax BuildLetClause(LuaExpressionSyntax collection, LetClauseSyntax node, ref IQueryRangeVariable rangeVariable)
{
var letExpression = (LuaExpressionSyntax)node.Expression.Accept(this);
var letRangeVariable = AddRangeIdentifier(node.Identifier);
var anonymousType = CreateQueryAnonymousType(rangeVariable.Name, rangeVariable.Name, letRangeVariable.Name, letExpression);
var selectFunction = new LuaFunctionExpressionSyntax();
selectFunction.AddParameter(rangeVariable.Name);
selectFunction.AddStatement(new LuaReturnStatementSyntax(anonymousType));
rangeVariable = new QueryPackVariable(rangeVariable, letRangeVariable);
return(new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.LinqSelect, collection, selectFunction, LuaIdentifierNameSyntax.AnonymousType));
}
private bool BuildQueryJoin(JoinClauseSyntax node, out LuaExpressionSyntax resultSelectorExpression, out LuaExpressionSyntax resultSelectorType, ref IQueryRangeVariable rangeVariable, QueryIdentifier queryIdentifier)
{
var parentNode = (QueryBodySyntax)node.Parent;
if (IsSpecialQueryNode(parentNode))
{
var selectClause = (SelectClauseSyntax)parentNode.SelectOrGroup;
resultSelectorExpression = (LuaExpressionSyntax)selectClause.Expression.Accept(this);
var typeSymbol = semanticModel_.GetTypeInfo(selectClause.Expression).Type;
resultSelectorType = GetTypeName(typeSymbol);
return(true);
}
else
{
resultSelectorExpression = CreateQueryAnonymousType(rangeVariable.Name, rangeVariable.Name, queryIdentifier.Name, queryIdentifier.Name);
resultSelectorType = LuaIdentifierNameSyntax.AnonymousType;
rangeVariable = new QueryPackVariable(rangeVariable, queryIdentifier);
return(false);
}
}
private LuaExpressionSyntax BuildFromClause(LuaExpressionSyntax collection, FromClauseSyntax node, ref IQueryRangeVariable rangeVariable, out bool isOver)
{
var collectionSelector = new LuaFunctionExpressionSyntax();
PushFunction(collectionSelector);
collectionSelector.AddParameter(rangeVariable.Name);
var expression = (LuaExpressionSyntax)node.Expression.Accept(this);
collectionSelector.AddStatement(new LuaReturnStatementSyntax(expression));
PopFunction();
var rangeVariable2 = AddRangeIdentifier(node.Identifier);
var resultSelector = new LuaFunctionExpressionSyntax();
PushFunction(resultSelector);
resultSelector.AddParameter(rangeVariable.Name);
resultSelector.AddParameter(rangeVariable2.Name);
LuaExpressionSyntax resultSelectorExpression;
LuaExpressionSyntax resultSelectorType;
var parentNode = (QueryBodySyntax)node.Parent;
if (IsSpecialQueryNode(parentNode))
{
var selectClause = (SelectClauseSyntax)parentNode.SelectOrGroup;
resultSelectorExpression = (LuaExpressionSyntax)selectClause.Expression.Accept(this);
var type = semanticModel_.GetTypeInfo(selectClause.Expression).Type;
resultSelectorType = GetTypeName(type);
isOver = true;
}
else
{
resultSelectorExpression = CreateQueryAnonymousType(rangeVariable.Name, rangeVariable.Name, rangeVariable2.Name, rangeVariable2.Name);
resultSelectorType = LuaIdentifierNameSyntax.AnonymousType;
rangeVariable = new QueryPackVariable(rangeVariable, rangeVariable2);
isOver = false;
}
resultSelector.AddStatement(new LuaReturnStatementSyntax(resultSelectorExpression));
PopFunction();
return(new LuaInvocationExpressionSyntax(LuaIdentifierNameSyntax.LinqSelectMany, collection, collectionSelector, resultSelector, resultSelectorType));
}
