59 lines
2.4 KiB
C#
59 lines
2.4 KiB
C#
// Copyright (c) Microsoft Open Technologies, Inc.
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// All Rights Reserved
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
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// WITHOUT LIMITATION ANY IMPLIED WARRANTIES OR CONDITIONS OF
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// TITLE, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABLITY OR
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// NON-INFRINGEMENT.
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// See the Apache 2 License for the specific language governing
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// permissions and limitations under the License.
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using Microsoft.AspNet.Razor.Tokenizer.Symbols;
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namespace Microsoft.AspNet.Razor.Parser
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{
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public partial class CSharpCodeParser
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{
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private void SetUpExpressions()
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{
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MapKeywords(AwaitExpression, CSharpKeyword.Await);
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}
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private void AwaitExpression(bool topLevel)
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{
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// Ensure that we're on the await statement (only runs in debug)
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Assert(CSharpKeyword.Await);
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// Accept the "await" and move on
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AcceptAndMoveNext();
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// Accept 1 or more spaces between the await and the following code.
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AcceptWhile(IsSpacingToken(includeNewLines: false, includeComments: true));
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// Accept a single code piece to await. This will accept up until a method "call" signature.
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// Ex: "@await |Foo|()" Inbetween the pipes is what is accepted. The Statement/ImplicitExpression
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// handling capture method calls and the parameters passed in.
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AcceptWhile(CSharpSymbolType.Identifier);
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// Top level basically indicates if we're within an expression or statement.
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// Ex: topLevel true = @await Foo() | topLevel false = @{ await Foo(); }
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// Note that in this case @{ <b>@await Foo()</b> } top level is true for await.
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// Therefore, if we're top level then we want to act like an implicit expression,
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// otherwise just act as whatever we're contained in.
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if (topLevel)
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{
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// Setup the Span to be an async implicit expression (an implicit expresison that allows spaces).
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// Spaces are allowed because of "@await Foo()".
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AsyncImplicitExpression();
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}
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}
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}
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}
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