// Dual licensed under the terms of the MIT X11 or GNU GPL
//
// Copyright 2007-2008 Novell, Inc
+// Copyright 2011 Xamarin Inc
//
using System;
-using System.Reflection;
using System.Collections.Generic;
namespace Mono.CSharp.Linq
public class QueryExpression : AQueryClause
{
public QueryExpression (AQueryClause start)
- : base (null, null, Location.Null)
+ : base (null, null, start.Location)
{
this.next = start;
}
{
}
- protected override void Error_TypeDoesNotContainDefinition (ResolveContext ec, TypeSpec type, string name)
+ public override void Error_TypeDoesNotContainDefinition (ResolveContext ec, TypeSpec type, string name)
{
ec.Report.Error (1935, loc, "An implementation of `{0}' query expression pattern could not be found. " +
"Are you missing `System.Linq' using directive or `System.Core.dll' assembly reference?",
return rmg;
}
+ protected override Expression DoResolveDynamic (ResolveContext ec, Expression memberExpr)
+ {
+ ec.Report.Error (1979, loc,
+ "Query expressions with a source or join sequence of type `dynamic' are not allowed");
+ return null;
+ }
+
#region IErrorHandler Members
bool OverloadResolver.IErrorHandler.AmbiguousCandidates (ResolveContext ec, MemberSpec best, MemberSpec ambiguous)
if (source_type != null) {
Argument a = arguments[0];
- if (TypeManager.IsGenericType (source_type) && TypeManager.ContainsGenericParameters (source_type)) {
+ if (TypeManager.IsGenericType (source_type) && InflatedTypeSpec.ContainsTypeParameter (source_type)) {
TypeInferenceContext tic = new TypeInferenceContext (source_type.TypeArguments);
tic.OutputTypeInference (rc, a.Expr, source_type);
if (tic.FixAllTypes (rc)) {
- source_type = source_type.GetDefinition ().MakeGenericType (tic.InferredTypeArguments);
+ source_type = source_type.GetDefinition ().MakeGenericType (rc, tic.InferredTypeArguments);
}
}
if (!Convert.ImplicitConversionExists (rc, a.Expr, source_type)) {
rc.Report.Error (1936, loc, "An implementation of `{0}' query expression pattern for source type `{1}' could not be found",
- best.Name, TypeManager.CSharpName (a.Type));
+ best.Name, a.Type.GetSignatureForError ());
return true;
}
}
protected virtual Parameter CreateChildrenParameters (Parameter parameter)
{
- return parameter;
+ // Have to clone the parameter for any children use, it carries block sensitive data
+ return parameter.Clone ();
}
protected virtual void CreateArguments (ResolveContext ec, Parameter parameter, ref Arguments args)
LambdaExpression selector = new LambdaExpression (loc);
- block.SetParameter (parameter.Clone ());
+ block.SetParameter (parameter);
selector.Block = block;
selector.Block.AddStatement (new ContextualReturn (expr));
{
sealed class RangeAnonymousTypeParameter : AnonymousTypeParameter
{
- public RangeAnonymousTypeParameter (Expression initializer, SimpleMemberName parameter)
- : base (initializer, parameter.Value, parameter.Location)
+ public RangeAnonymousTypeParameter (Expression initializer, RangeVariable parameter)
+ : base (initializer, parameter.Name, parameter.Location)
{
}
}
}
- protected SimpleMemberName range_variable;
+ class RangeParameterReference : ParameterReference
+ {
+ Parameter parameter;
+
+ public RangeParameterReference (Parameter p)
+ : base (null, p.Location)
+ {
+ this.parameter = p;
+ }
- protected ARangeVariableQueryClause (QueryBlock block, SimpleMemberName identifier, Expression expr, Location loc)
+ protected override Expression DoResolve (ResolveContext ec)
+ {
+ pi = ec.CurrentBlock.ParametersBlock.GetParameterInfo (parameter);
+ return base.DoResolve (ec);
+ }
+ }
+
+ protected RangeVariable identifier;
+
+ protected ARangeVariableQueryClause (QueryBlock block, RangeVariable identifier, Expression expr, Location loc)
: base (block, expr, loc)
{
- range_variable = identifier;
+ this.identifier = identifier;
+ }
+
+ public RangeVariable Identifier {
+ get {
+ return identifier;
+ }
}
public FullNamedExpression IdentifierType { get; set; }
protected override Parameter CreateChildrenParameters (Parameter parameter)
{
- return new QueryBlock.TransparentParameter (parameter, GetIntoVariable ());
+ return new QueryBlock.TransparentParameter (parameter.Clone (), GetIntoVariable ());
}
- protected static Expression CreateRangeVariableType (ResolveContext rc, Parameter parameter, SimpleMemberName name, Expression init)
+ protected static Expression CreateRangeVariableType (ResolveContext rc, Parameter parameter, RangeVariable name, Expression init)
{
var args = new List<AnonymousTypeParameter> (2);
- args.Add (new AnonymousTypeParameter (parameter));
+
+ //
+ // The first argument is the reference to the parameter
+ //
+ args.Add (new AnonymousTypeParameter (new RangeParameterReference (parameter), parameter.Name, parameter.Location));
+
+ //
+ // The second argument is the linq expression
+ //
args.Add (new RangeAnonymousTypeParameter (init, name));
+
+ //
+ // Create unique anonymous type
+ //
return new NewAnonymousType (args, rc.MemberContext.CurrentMemberDefinition.Parent, name.Location);
}
- protected virtual SimpleMemberName GetIntoVariable ()
+ protected virtual RangeVariable GetIntoVariable ()
{
- return range_variable;
+ return identifier;
}
}
- class QueryStartClause : ARangeVariableQueryClause
+ public sealed class RangeVariable : INamedBlockVariable
{
- public QueryStartClause (QueryBlock block, Expression expr, SimpleMemberName identifier, Location loc)
- : base (block, identifier, expr, loc)
+ Block block;
+
+ public RangeVariable (string name, Location loc)
{
- block.AddRangeVariable (identifier);
+ Name = name;
+ Location = loc;
}
- public override Expression BuildQueryClause (ResolveContext ec, Expression lSide, Parameter parameter)
+ #region Properties
+
+ public Block Block {
+ get {
+ return block;
+ }
+ set {
+ block = value;
+ }
+ }
+
+ public bool IsDeclared {
+ get {
+ return true;
+ }
+ }
+
+ public bool IsParameter {
+ get {
+ return false;
+ }
+ }
+
+ public Location Location { get; private set; }
+
+ public string Name { get; private set; }
+
+ #endregion
+
+ public Expression CreateReferenceExpression (ResolveContext rc, Location loc)
{
-/*
- expr = expr.Resolve (ec);
- if (expr == null)
- return null;
+ //
+ // We know the variable name is somewhere in the scope. This generates
+ // an access expression from current block
+ //
+ var pb = rc.CurrentBlock.ParametersBlock;
+ while (true) {
+ if (pb is QueryBlock) {
+ for (int i = pb.Parameters.Count - 1; i >= 0; --i) {
+ var p = pb.Parameters[i];
+ if (p.Name == Name)
+ return pb.GetParameterReference (i, loc);
+
+ Expression expr = null;
+ var tp = p as QueryBlock.TransparentParameter;
+ while (tp != null) {
+ if (expr == null)
+ expr = pb.GetParameterReference (i, loc);
+ else
+ expr = new TransparentMemberAccess (expr, tp.Name);
+
+ if (tp.Identifier == Name)
+ return new TransparentMemberAccess (expr, Name);
+
+ if (tp.Parent.Name == Name)
+ return new TransparentMemberAccess (expr, Name);
+
+ tp = tp.Parent as QueryBlock.TransparentParameter;
+ }
+ }
+ }
- if (expr.Type == InternalType.Dynamic || expr.Type == TypeManager.void_type) {
- ec.Report.Error (1979, expr.Location,
- "Query expression with a source or join sequence of type `{0}' is not allowed",
- TypeManager.CSharpName (expr.Type));
- return null;
+ if (pb == block)
+ return null;
+
+ pb = pb.Parent.ParametersBlock;
}
-*/
+ }
+ }
+
+ public class QueryStartClause : ARangeVariableQueryClause
+ {
+ public QueryStartClause (QueryBlock block, Expression expr, RangeVariable identifier, Location loc)
+ : base (block, identifier, expr, loc)
+ {
+ block.AddRangeVariable (identifier);
+ }
+ public override Expression BuildQueryClause (ResolveContext ec, Expression lSide, Parameter parameter)
+ {
if (IdentifierType != null)
expr = CreateCastExpression (expr);
if (parameter == null)
lSide = expr;
- return next.BuildQueryClause (ec, lSide, new ImplicitLambdaParameter (range_variable.Value, range_variable.Location));
+ return next.BuildQueryClause (ec, lSide, new ImplicitLambdaParameter (identifier.Name, identifier.Location));
}
protected override Expression DoResolve (ResolveContext ec)
}
}
+ public Expression SelectorExpression {
+ get {
+ return element_selector;
+ }
+ }
+
protected override void CreateArguments (ResolveContext ec, Parameter parameter, ref Arguments args)
{
base.CreateArguments (ec, parameter, ref args);
protected override string MethodName {
get { return "GroupBy"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
}
public class Join : SelectMany
{
QueryBlock inner_selector, outer_selector;
- public Join (QueryBlock block, SimpleMemberName lt, Expression inner, QueryBlock outerSelector, QueryBlock innerSelector, Location loc)
+ public Join (QueryBlock block, RangeVariable lt, Expression inner, QueryBlock outerSelector, QueryBlock innerSelector, Location loc)
: base (block, lt, inner, loc)
{
this.outer_selector = outerSelector;
this.inner_selector = innerSelector;
}
+ public QueryBlock InnerSelector {
+ get {
+ return inner_selector;
+ }
+ }
+
+ public QueryBlock OuterSelector {
+ get {
+ return outer_selector;
+ }
+ }
+
protected override void CreateArguments (ResolveContext ec, Parameter parameter, ref Arguments args)
{
args = new Arguments (4);
lambda.Block = outer_selector;
args.Add (new Argument (lambda));
- inner_selector.SetParameter (new ImplicitLambdaParameter (range_variable.Value, range_variable.Location));
+ inner_selector.SetParameter (new ImplicitLambdaParameter (identifier.Name, identifier.Location));
lambda = new LambdaExpression (inner_selector.StartLocation);
lambda.Block = inner_selector;
args.Add (new Argument (lambda));
protected override string MethodName {
get { return "Join"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
}
public class GroupJoin : Join
{
- readonly SimpleMemberName into;
+ readonly RangeVariable into;
- public GroupJoin (QueryBlock block, SimpleMemberName lt, Expression inner,
- QueryBlock outerSelector, QueryBlock innerSelector, SimpleMemberName into, Location loc)
+ public GroupJoin (QueryBlock block, RangeVariable lt, Expression inner,
+ QueryBlock outerSelector, QueryBlock innerSelector, RangeVariable into, Location loc)
: base (block, lt, inner, outerSelector, innerSelector, loc)
{
this.into = into;
}
- protected override SimpleMemberName GetIntoVariable ()
+ protected override RangeVariable GetIntoVariable ()
{
return into;
}
protected override string MethodName {
get { return "GroupJoin"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
}
public class Let : ARangeVariableQueryClause
{
- public Let (QueryBlock block, SimpleMemberName identifier, Expression expr, Location loc)
+ public Let (QueryBlock block, RangeVariable identifier, Expression expr, Location loc)
: base (block, identifier, expr, loc)
{
}
protected override void CreateArguments (ResolveContext ec, Parameter parameter, ref Arguments args)
{
- expr = CreateRangeVariableType (ec, parameter, range_variable, expr);
+ expr = CreateRangeVariableType (ec, parameter, identifier, expr);
base.CreateArguments (ec, parameter, ref args);
}
protected override string MethodName {
get { return "Select"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
}
public class Select : AQueryClause
protected override string MethodName {
get { return "Select"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
+
}
public class SelectMany : ARangeVariableQueryClause
{
- public SelectMany (QueryBlock block, SimpleMemberName identifier, Expression expr, Location loc)
+ public SelectMany (QueryBlock block, RangeVariable identifier, Expression expr, Location loc)
: base (block, identifier, expr, loc)
{
}
if (IdentifierType != null)
expr = CreateCastExpression (expr);
- base.CreateArguments (ec, parameter, ref args);
+ base.CreateArguments (ec, parameter.Clone (), ref args);
}
Expression result_selector_expr;
QueryBlock result_block;
var target = GetIntoVariable ();
- var target_param = new ImplicitLambdaParameter (target.Value, target.Location);
+ var target_param = new ImplicitLambdaParameter (target.Name, target.Location);
//
// When select follows use it as a result selector
next = next.next;
} else {
- result_selector_expr = CreateRangeVariableType (ec, parameter, target, new SimpleName (target.Value, target.Location));
+ result_selector_expr = CreateRangeVariableType (ec, parameter, target, new SimpleName (target.Name, target.Location));
- result_block = new QueryBlock (ec.Compiler, block.Parent, block.StartLocation);
+ result_block = new QueryBlock (block.Parent, block.StartLocation);
result_block.SetParameters (parameter, target_param);
}
protected override string MethodName {
get { return "SelectMany"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
}
public class Where : AQueryClause
{
- public Where (QueryBlock block, BooleanExpression expr, Location loc)
+ public Where (QueryBlock block, Expression expr, Location loc)
: base (block, expr, loc)
{
}
get { return "Where"; }
}
- protected override void CreateArguments (ResolveContext ec, Parameter parameter, ref Arguments args)
+ public override object Accept (StructuralVisitor visitor)
{
- base.CreateArguments (ec, parameter, ref args);
+ return visitor.Visit (this);
}
}
protected override string MethodName {
get { return "OrderBy"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
}
public class OrderByDescending : AQueryClause
protected override string MethodName {
get { return "OrderByDescending"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
}
public class ThenByAscending : OrderByAscending
protected override string MethodName {
get { return "ThenBy"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
}
public class ThenByDescending : OrderByDescending
protected override string MethodName {
get { return "ThenByDescending"; }
}
+
+ public override object Accept (StructuralVisitor visitor)
+ {
+ return visitor.Visit (this);
+ }
}
//
// Implicit query block
//
- public class QueryBlock : ToplevelBlock
+ public class QueryBlock : ParametersBlock
{
//
// Transparent parameters are used to package up the intermediate results
public readonly Parameter Parent;
public readonly string Identifier;
- public TransparentParameter (Parameter parent, SimpleMemberName identifier)
+ public TransparentParameter (Parameter parent, RangeVariable identifier)
: base (ParameterNamePrefix + Counter++, identifier.Location)
{
Parent = parent;
- Identifier = identifier.Value;
+ Identifier = identifier.Name;
}
- public new static void Reset ()
+ public static void Reset ()
{
Counter = 0;
}
}
- sealed class RangeVariable : IKnownVariable
- {
- public RangeVariable (QueryBlock block, Location loc)
- {
- Block = block;
- Location = loc;
- }
-
- public Block Block { get; private set; }
-
- public Location Location { get; private set; }
- }
-
- List<SimpleMemberName> range_variables;
-
- public QueryBlock (CompilerContext ctx, Block parent, Location start)
- : base (ctx, parent, ParametersCompiled.EmptyReadOnlyParameters, start)
+ public QueryBlock (Block parent, Location start)
+ : base (parent, ParametersCompiled.EmptyReadOnlyParameters, start, Flags.CompilerGenerated)
{
}
- public void AddRangeVariable (SimpleMemberName name)
+ public void AddRangeVariable (RangeVariable variable)
{
- if (!CheckParentConflictName (this, name.Value, name.Location))
- return;
-
- if (range_variables == null)
- range_variables = new List<SimpleMemberName> ();
-
- range_variables.Add (name);
- AddKnownVariable (name.Value, new RangeVariable (this, name.Location));
+ variable.Block = this;
+ TopBlock.AddLocalName (variable.Name, variable, true);
}
- //
- // Query parameter reference can include transparent parameters
- //
- protected override Expression GetParameterReferenceExpression (string name, Location loc)
+ public override void Error_AlreadyDeclared (string name, INamedBlockVariable variable, string reason)
{
- Expression expr = base.GetParameterReferenceExpression (name, loc);
- if (expr != null)
- return expr;
-
- TransparentParameter tp = parameters [0] as TransparentParameter;
- while (tp != null) {
- if (tp.Identifier == name)
- break;
-
- TransparentParameter tp_next = tp.Parent as TransparentParameter;
- if (tp_next == null && tp.Parent.Name == name)
- break;
-
- tp = tp_next;
- }
-
- if (tp != null) {
- expr = new SimpleName (parameters[0].Name, loc);
- TransparentParameter tp_cursor = (TransparentParameter) parameters[0];
- while (tp_cursor != tp) {
- tp_cursor = (TransparentParameter) tp_cursor.Parent;
- expr = new TransparentMemberAccess (expr, tp_cursor.Name);
- }
-
- return new TransparentMemberAccess (expr, name);
- }
-
- return null;
+ TopBlock.Report.Error (1931, variable.Location,
+ "A range variable `{0}' conflicts with a previous declaration of `{0}'",
+ name);
}
- protected override bool HasParameterWithName (string name)
+ public override void Error_AlreadyDeclared (string name, INamedBlockVariable variable)
{
- return range_variables != null && range_variables.Exists (l => l.Value == name);
+ TopBlock.Report.Error (1930, variable.Location,
+ "A range variable `{0}' has already been declared in this scope",
+ name);
}
- protected override void Error_AlreadyDeclared (Location loc, string var, string reason)
- {
- Report.Error (1931, loc, "A range variable `{0}' conflicts with a previous declaration of `{0}'",
- var);
- }
-
- protected override void Error_AlreadyDeclared (Location loc, string var)
+ public override void Error_AlreadyDeclaredTypeParameter (string name, Location loc)
{
- Report.Error (1930, loc, "A range variable `{0}' has already been declared in this scope",
- var);
- }
-
- public override void Error_AlreadyDeclaredTypeParameter (Location loc, string name, string conflict)
- {
- Report.Error (1948, loc, "A range variable `{0}' conflicts with a method type parameter",
+ TopBlock.Report.Error (1948, loc,
+ "A range variable `{0}' conflicts with a method type parameter",
name);
}
public void SetParameter (Parameter parameter)
{
- base.parameters = new ParametersCompiled (null, parameter);
- base.parameter_info = new ToplevelParameterInfo [] {
- new ToplevelParameterInfo (this, 0)
+ base.parameters = new ParametersCompiled (parameter);
+ base.parameter_info = new ParameterInfo[] {
+ new ParameterInfo (this, 0)
};
}
public void SetParameters (Parameter first, Parameter second)
{
- base.parameters = new ParametersCompiled (null, first, second);
- base.parameter_info = new ToplevelParameterInfo[] {
- new ToplevelParameterInfo (this, 0),
- new ToplevelParameterInfo (this, 1)
+ base.parameters = new ParametersCompiled (first, second);
+ base.parameter_info = new ParameterInfo[] {
+ new ParameterInfo (this, 0),
+ new ParameterInfo (this, 1)
};
}
}
: base (expr, name)
{
}
+
+ public override Expression DoResolveLValue (ResolveContext rc, Expression right_side)
+ {
+ rc.Report.Error (1947, loc,
+ "A range variable `{0}' cannot be assigned to. Consider using `let' clause to store the value",
+ Name);
+
+ return null;
+ }
}
}
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