quis/src/ast-types.ts

A simple DSL for data sorting and filtering

/**
 * Token types for the Quis expression language
 */
export enum TokenType {
    // Literals
    NUMBER = 'NUMBER',
    STRING = 'STRING',
    BOOLEAN = 'BOOLEAN',
    NULL = 'NULL',
    
    // Variables
    VARIABLE = 'VARIABLE',
    DOT = 'DOT',
    LBRACKET = 'LBRACKET',
    RBRACKET = 'RBRACKET',
    
    // Operators
    EQUALS = 'EQUALS',
    NOT_EQUALS = 'NOT_EQUALS',
    GREATER_THAN = 'GREATER_THAN',
    GREATER_THAN_EQUAL = 'GREATER_THAN_EQUAL',
    LESS_THAN = 'LESS_THAN',
    LESS_THAN_EQUAL = 'LESS_THAN_EQUAL',
    
    // Arithmetic operators
    PLUS = 'PLUS',
    MINUS = 'MINUS',
    MULTIPLY = 'MULTIPLY',
    DIVIDE = 'DIVIDE',
    
    // Shorthand operators
    IS = 'IS',
    IS_NOT = 'IS_NOT',
    GT = 'GT',
    GTE = 'GTE',
    LT = 'LT',
    LTE = 'LTE',
    
    // Logical operators
    AND = 'AND',
    OR = 'OR',
    NOT = 'NOT',
    
    // Custom conditions
    CUSTOM = 'CUSTOM',
    COLON = 'COLON',
    IDENTIFIER = 'IDENTIFIER',
    
    // Grouping
    LPAREN = 'LPAREN',
    RPAREN = 'RPAREN',
    
    // Special
    EOF = 'EOF',
    WHITESPACE = 'WHITESPACE'
}

export interface Token {
    type: TokenType;
    value: string;
    position: number;
}

/**
 * AST Node types
 */
export interface ASTNode {
    type: string;
}

export interface LiteralNode extends ASTNode {
    type: 'literal';
    value: string | number | boolean | null;
}

export interface VariableNode extends ASTNode {
    type: 'variable';
    name: string;
}

export interface PropertyAccessNode extends ASTNode {
    type: 'property';
    object: string;
    property: string;
    notation: 'dot' | 'bracket';
}

export interface BinaryOpNode extends ASTNode {
    type: 'binary';
    operator: string;
    left: ASTNode;
    right: ASTNode;
}

export interface UnaryOpNode extends ASTNode {
    type: 'unary';
    operator: string;
    operand: ASTNode;
}

export interface CustomConditionNode extends ASTNode {
    type: 'custom';
    name: string;
    left: ASTNode;
    right: ASTNode;
}