import type { IrType } from "@tsonic/frontend";
import type { EmitterContext } from "../../types.js";
import type { CSharpExpressionAst, CSharpTypeAst } from "../format/backend-ast/types.js";
import { buildRuntimeUnionTypeAst, type RuntimeUnionLayout } from "./runtime-unions.js";
type RuntimeUnionProjectionBodyResult = CSharpExpressionAst | readonly [CSharpExpressionAst, EmitterContext] | undefined;
export declare const buildRuntimeUnionFactoryCallAst: (unionTypeAst: ReturnType<typeof buildRuntimeUnionTypeAst>, memberIndex: number, valueAst: CSharpExpressionAst) => CSharpExpressionAst;
export declare const buildRuntimeUnionMatchAst: (valueAst: CSharpExpressionAst, lambdaArgs: readonly CSharpExpressionAst[], typeArguments?: readonly CSharpTypeAst[]) => CSharpExpressionAst;
export declare const buildInvalidRuntimeUnionCastExpression: (actualType: IrType, expectedType: IrType, context?: EmitterContext) => CSharpExpressionAst;
export declare const buildInvalidRuntimeUnionMaterializationExpression: (sourceType: IrType, targetType: IrType) => CSharpExpressionAst;
export declare const tryBuildRuntimeUnionProjectionToLayoutAst: (opts: {
    readonly valueAst: CSharpExpressionAst;
    readonly sourceLayout: RuntimeUnionLayout;
    readonly targetLayout: RuntimeUnionLayout;
    readonly context: EmitterContext;
    readonly candidateMemberNs?: readonly number[];
    readonly selectedSourceMemberNs?: ReadonlySet<number>;
    readonly buildMappedMemberValue: (args: {
        readonly actualMember: IrType;
        readonly actualMemberTypeAst: RuntimeUnionLayout["memberTypeAsts"][number];
        readonly parameterExpr: CSharpExpressionAst;
        readonly targetMember: IrType;
        readonly targetMemberTypeAst: RuntimeUnionLayout["memberTypeAsts"][number];
        readonly sourceMemberN: number;
        readonly targetMemberIndex: number;
        readonly context: EmitterContext;
    }) => [CSharpExpressionAst, EmitterContext] | undefined;
    readonly buildExcludedMemberBody?: (args: {
        readonly actualMember: IrType;
        readonly sourceMemberN: number;
        readonly context: EmitterContext;
    }) => CSharpExpressionAst | undefined;
    readonly buildUnmappedMemberBody?: (args: {
        readonly actualMember: IrType;
        readonly parameterExpr: CSharpExpressionAst;
        readonly sourceMemberN: number;
        readonly context: EmitterContext;
    }) => RuntimeUnionProjectionBodyResult;
}) => [CSharpExpressionAst, EmitterContext] | undefined;
export {};
//# sourceMappingURL=runtime-union-projection.d.ts.map