Await

AwaitExpression represents an await operation inside an AsyncBlockExpression. It suspends execution until the awaitable completes, then resumes with the result.

Any awaitable type is supported – Task, Task<T>, ValueTask, ValueTask<T>, or any type that provides a GetAwaiter() method returning an INotifyCompletion implementation.

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Factory Method

using static Hyperbee.Expressions.ExpressionExtensions;

AwaitExpression Await( Expression expression, bool configureAwait = false )

Parameter	Type	Description
expression	Expression	An expression that produces an awaitable (Task, Task<T>, ValueTask<T>, etc.)
configureAwait	bool	Whether to call .ConfigureAwait(false). Default: false

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Usage

Await a Task

using static System.Linq.Expressions.Expression;
using static Hyperbee.Expressions.ExpressionExtensions;

var result = Variable( typeof(string), "result" );

var asyncBlock = BlockAsync(
    [result],
    Assign( result, Await( Call( typeof(MyService).GetMethod("FetchAsync") ) ) ),
    result
);

var lambda = Lambda<Func<Task<string>>>( asyncBlock );

Await with ConfigureAwait(false)

var asyncBlock = BlockAsync(
    Await(
        Call( typeof(Task).GetMethod("Delay", [typeof(int)]), Constant( 500 ) ),
        configureAwait: true   // emits .ConfigureAwait(false)
    )
);

Await ValueTask

// Awaiting ValueTask<int>
var asyncBlock = BlockAsync(
    [result],
    Assign( result, Await( Call( typeof(MyService).GetMethod("GetValueTaskAsync") ) ) )
);

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Type

The Type property returns the result type of the awaitable:

• Task -> void
• Task<T> -> T
• ValueTask<T> -> T

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Notes

• Await must be used inside an AsyncBlockExpression. Using it elsewhere causes a compile-time error.
• The enclosing BlockAsync wraps all awaited continuations in the generated state machine.
• See Async Block for the enclosing block type.