import type { Assignment, Array as CDDLArray, Group, NativeTypeWithOperator, Property, PropertyReference, Variable } from './ast.js';
import { Token } from './tokens.js';
export declare function isLetter(ch: string): boolean;
export declare function isAlphabeticCharacter(ch: string): boolean;
export declare function isDigit(ch: string): boolean;
export declare function hasSpecialNumberCharacter(ch: number): boolean;
export declare function parseNumberValue(token: Token): string | number;
export declare function pascalCase(name: string): string;
export declare function isVariable(assignment: Assignment): assignment is Variable;
export declare function isGroup(t: any): t is Group;
export declare function isCDDLArray(t: any): t is CDDLArray;
export declare function isProperty(t: any): t is Property;
export declare function isUnNamedProperty(t: any): t is Property & {
    Name: '';
};
export declare function isNamedGroupReference(t: any): t is PropertyReference & {
    Value: string;
};
export declare function isPropertyReference(t: any): t is PropertyReference;
export declare function isNativeTypeWithOperator(t: any): t is NativeTypeWithOperator;
export declare function getRegexpPattern(t: any): string | undefined;
export declare function isRange(t: any): boolean;
export declare function isLiteralWithValue(t: any): t is {
    Type: 'literal';
    Value: unknown;
};
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