2 // complete.cs: Expression that are used for completion suggestions.
5 // Miguel de Icaza (miguel@ximian.com)
6 // Marek Safar (marek.safar@gmail.com)
8 // Copyright 2001, 2002, 2003 Ximian, Inc.
9 // Copyright 2003-2009 Novell, Inc.
10 // Copyright 2011 Xamarin Inc
12 // Completion* classes derive from ExpressionStatement as this allows
13 // them to pass through the parser in many conditions that require
14 // statements even when the expression is incomplete (for example
15 // completing inside a lambda
17 using System.Collections.Generic;
20 namespace Mono.CSharp {
23 // A common base class for Completing expressions, it
24 // is just a very simple ExpressionStatement
26 public abstract class CompletingExpression : ExpressionStatement
28 public static void AppendResults (List<string> results, string prefix, IEnumerable<string> names)
30 foreach (string name in names) {
34 if (prefix != null && !name.StartsWith (prefix))
37 if (results.Contains (name))
41 results.Add (name.Substring (prefix.Length));
47 public override bool ContainsEmitWithAwait ()
52 public override Expression CreateExpressionTree (ResolveContext ec)
57 public override void EmitStatement (EmitContext ec)
62 public override void Emit (EmitContext ec)
68 public class CompletionSimpleName : CompletingExpression {
71 public CompletionSimpleName (string prefix, Location l)
77 protected override Expression DoResolve (ResolveContext ec)
79 var results = new List<string> ();
81 ec.CurrentMemberDefinition.GetCompletionStartingWith (Prefix, results);
83 throw new CompletionResult (Prefix, results.Distinct ().Select (l => l.Substring (Prefix.Length)).ToArray ());
86 protected override void CloneTo (CloneContext clonectx, Expression t)
92 public class CompletionMemberAccess : CompletingExpression {
97 public CompletionMemberAccess (Expression e, string partial_name, Location l)
101 this.partial_name = partial_name;
104 public CompletionMemberAccess (Expression e, string partial_name, TypeArguments targs, Location l)
108 this.partial_name = partial_name;
112 protected override Expression DoResolve (ResolveContext ec)
114 Expression expr_resolved = expr.Resolve (ec,
115 ResolveFlags.VariableOrValue | ResolveFlags.Type);
117 if (expr_resolved == null)
120 TypeSpec expr_type = expr_resolved.Type;
121 if (expr_type.IsPointer || expr_type.Kind == MemberKind.Void || expr_type == InternalType.NullLiteral || expr_type == InternalType.AnonymousMethod) {
122 expr_resolved.Error_OperatorCannotBeApplied (ec, loc, ".", expr_type);
127 if (!targs.Resolve (ec))
131 var results = new List<string> ();
132 if (expr_resolved is Namespace){
133 Namespace nexpr = expr_resolved as Namespace;
134 string namespaced_partial;
136 if (partial_name == null)
137 namespaced_partial = nexpr.Name;
139 namespaced_partial = nexpr.Name + "." + partial_name;
141 ec.CurrentMemberDefinition.GetCompletionStartingWith (namespaced_partial, results);
142 if (partial_name != null)
143 results = results.Select (l => l.Substring (partial_name.Length)).ToList ();
145 var r = MemberCache.GetCompletitionMembers (ec, expr_type, partial_name).Select (l => l.Name);
146 AppendResults (results, partial_name, r);
149 throw new CompletionResult (partial_name == null ? "" : partial_name, results.Distinct ().ToArray ());
152 protected override void CloneTo (CloneContext clonectx, Expression t)
154 CompletionMemberAccess target = (CompletionMemberAccess) t;
157 target.targs = targs.Clone ();
159 target.expr = expr.Clone (clonectx);
163 public class CompletionElementInitializer : CompletingExpression {
166 public CompletionElementInitializer (string partial_name, Location l)
168 this.partial_name = partial_name;
172 protected override Expression DoResolve (ResolveContext ec)
174 var members = MemberCache.GetCompletitionMembers (ec, ec.CurrentInitializerVariable.Type, partial_name);
176 // TODO: Does this mean exact match only ?
177 // if (partial_name != null && results.Count > 0 && result [0] == "")
178 // throw new CompletionResult ("", new string [] { "=" });
180 var results = members.Where (l => (l.Kind & (MemberKind.Field | MemberKind.Property)) != 0).Select (l => l.Name).ToList ();
181 if (partial_name != null) {
182 var temp = new List<string> ();
183 AppendResults (temp, partial_name, results);
187 throw new CompletionResult (partial_name == null ? "" : partial_name, results.Distinct ().ToArray ());
190 protected override void CloneTo (CloneContext clonectx, Expression t)