import { Filepath } from '../../core/types/filepath';
import { default as Report } from '../../core/types/report';
import { NodeSymbol } from '../../core/types/symbol';
import { default as Compiler } from '..';
/**
 * Checks if an identifier is valid (can be used without quotes in DBML).
 * Valid identifiers must:
 * - Contain only alphanumeric characters and underscores
 * - Not start with a digit
 *
 * @param name - The identifier to check
 * @returns True if the identifier is valid and doesn't need quotes
 *
 * @example
 * isValidIdentifier('users') => true
 * isValidIdentifier('user_name') => true
 * isValidIdentifier('user name') => false (contains space)
 * isValidIdentifier('123users') => false (starts with digit)
 */
export declare function isValidIdentifier(name: string): boolean;
/**
 * Adds double quotes around an identifier if needed.
 * Identifiers need quotes if they:
 * - Contain non-alphanumeric characters (except underscore)
 * - Start with a digit
 * - Are empty strings
 *
 * @param identifier - The identifier to potentially quote
 * @returns The identifier with double quotes if needed, otherwise unchanged
 *
 * @example
 * addDoubleQuoteIfNeeded('users') => 'users'
 * addDoubleQuoteIfNeeded('user name') => '"user name"'
 * addDoubleQuoteIfNeeded('123users') => '"123users"'
 * addDoubleQuoteIfNeeded('user-name') => '"user-name"'
 */
export declare function addDoubleQuoteIfNeeded(identifier: string): string;
export declare function normalizeQualifiedName(...parts: string[]): string;
/**
 * Unescapes a string by processing escape sequences.
 * Handles escaped quotes (\"), common escape sequences, unicode (\uHHHH), and arbitrary escapes.
 *
 * @param str - The string to unescape
 * @returns The unescaped string
 *
 * @example
 * unescapeString('table\\"name') => 'table"name'
 * unescapeString('line1\\nline2') => 'line1\nline2'
 * unescapeString('\\u0041BC') => 'ABC'
 * unescapeString('\\x') => 'x'
 */
export declare function unescapeString(str: string): string;
/**
 * Escapes a string by adding backslashes before special characters.
 * Handles quotes and other characters that need escaping.
 *
 * @param str - The string to escape
 * @returns The escaped string
 *
 * @example
 * escapeString('table"name') => 'table\\"name'
 * escapeString('line1\nline2') => 'line1\\nline2'
 */
export declare function escapeString(str: string): string;
/**
 * Formats a record value for DBML output.
 * Handles different data types and converts them to appropriate DBML syntax.
 *
 * @param recordValue - The record value with type information, or a primitive value
 * @returns The formatted string representation for DBML
 *
 * @example
 * formatRecordValue({ value: 1, type: 'integer' }) => '1'
 * formatRecordValue({ value: 'Alice', type: 'string' }) => "'Alice'"
 * formatRecordValue({ value: true, type: 'bool' }) => 'true'
 * formatRecordValue({ value: null, type: 'string' }) => 'null'
 * formatRecordValue(undefined) => 'null'
 * formatRecordValue(null) => 'null'
 * formatRecordValue('Alice') => "'Alice'"
 * formatRecordValue(42) => '42'
 * formatRecordValue(true) => 'true'
 */
export declare function formatRecordValue(recordValue: {
    value: any;
    type: string;
} | string | number | boolean | null | undefined): string;
/**
 * Splits a qualified identifier string into its components, handling quoted segments.
 *
 * Examples:
 *   - "schema.table" => ["schema", "table"]
 *   - '"schema name".table' => ["schema name", "table"]
 *   - '"schema.with.dots"."table.with.dots".column' => ["schema.with.dots", "table.with.dots", "column"]
 *   - 'schema."table name"."column name"' => ["schema", "table name", "column name"]
 *   - 'schema . table' => ["schema", "table"]
 *
 * @param identifier - The qualified identifier string to split
 * @returns Array of unquoted identifier components
 */
export declare function splitQualifiedIdentifier(identifier: string): string[];
export declare function collectTransitiveDependencies(compiler: Compiler, entrypoints: Filepath[]): Filepath[];
export declare function allVisibleMembers(compiler: Compiler): Report<NodeSymbol[]>;
/**
 * Wraps a note value in the appropriate DBML quote style.
 * Uses triple quotes for multiline content, single quotes otherwise.
 */
export declare function quoteNoteValue(value: string): string;