import type { IrParameter, IrType } from "@tsonic/frontend";
import type { CSharpExpressionAst, CSharpTypeAst } from "../core/format/backend-ast/types.js";
export type RuntimeParameterDefaultInfo = {
    readonly paramName: string;
    readonly typeAst: CSharpTypeAst;
    readonly initializer: CSharpExpressionAst;
    readonly sourceName?: string;
    readonly semanticType?: IrType;
};
export declare const isCSharpOptionalParameterDefaultAst: (expr: CSharpExpressionAst) => boolean;
export declare const supportsNullCoalescingParameterDefault: (typeAst: CSharpTypeAst) => boolean;
export declare const preservesNullableShadowType: (initializer: CSharpExpressionAst) => boolean;
export declare const signatureDefaultForInitializedParameter: (parameters: readonly IrParameter[], parameterIndex: number, typeAst: CSharpTypeAst, initializer: CSharpExpressionAst) => CSharpExpressionAst | undefined;
export declare const canEmitParameterDefaultInSignature: (parameters: readonly IrParameter[], parameterIndex: number) => boolean;
export declare const computeWrapperPrefixLengths: (parameters: readonly IrParameter[], suppressedDefaultIndexes: ReadonlySet<number>) => readonly number[];
export declare const canLowerParameterDefaultViaWrapper: (parameters: readonly IrParameter[], parameterIndex: number) => boolean;
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