/**
 * Lambda body emission and async union return planning.
 *
 * Extracted from functions.ts — contains the lambda body emitters,
 * async union return plan resolution, and the public emitFunctionExpression /
 * emitArrowFunction entry points.
 */
import { IrExpression, IrType } from "@tsonic/frontend";
import { EmitterContext } from "../types.js";
import type { CSharpExpressionAst } from "../core/format/backend-ast/types.js";
/**
 * Emit a function expression as CSharpExpressionAst (C# lambda)
 */
export declare const emitFunctionExpression: (expr: Extract<IrExpression, {
    kind: "functionExpression";
}>, context: EmitterContext, expectedType?: IrType) => [CSharpExpressionAst, EmitterContext];
/**
 * Emit an arrow function as CSharpExpressionAst (C# lambda)
 */
export declare const emitArrowFunction: (expr: Extract<IrExpression, {
    kind: "arrowFunction";
}>, context: EmitterContext, expectedType?: IrType) => [CSharpExpressionAst, EmitterContext];
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