ParseError.swift

//
//  ParseError.swift
//  slox
//
//  Created by Danielle Kefford on 2/25/24.
//

import Foundation

enum ParseError: CustomStringConvertible, Equatable, LocalizedError {
    case missingClosingParenthesis(Token)
    case expectedPrimaryExpression(Token)
    case missingSemicolon(Token)
    case missingVariableName(Token)
    case invalidAssignmentTarget(Token)
    case missingClosingBrace(Token)
    case missingOpenParenForIfStatement(Token)
    case missingCloseParenForIfStatement(Token)
    case missingOpenParenForWhileStatement(Token)
    case missingCloseParenForWhileStatement(Token)
    case missingOpenParenForForStatement(Token)
    case missingCloseParenForForStatement(Token)
    case missingSemicolonAfterForLoopCondition(Token)
    case missingClassName(Token)
    case missingOpenBraceBeforeClassBody(Token)
    case missingFunctionName(Token)
    case missingOpenParenForFunctionDeclaration(Token)
    case missingParameterName(Token)
    case missingOpenBraceBeforeFunctionBody(Token)
    case missingCloseParenAfterArguments(Token)
    case missingIdentifierAfterDot(Token)
    case missingSuperclassName(Token)
    case missingDotAfterSuper(Token)
    case expectedSuperclassMethodName(Token)

    var description: String {
        switch self {
        case .missingClosingParenthesis(let token):
            return "[Line \(token.line)] Error: expected closing parenthesis in expression"
        case .expectedPrimaryExpression(let token):
            return "[Line \(token.line)] Error: expected primary expression"
        case .missingSemicolon(let token):
            return "[Line \(token.line)] Error: expected semicolon after value"
        case .missingVariableName(let token):
            return "[Line \(token.line)] Error: expected variable name"
        case .invalidAssignmentTarget(let token):
            return "[Line \(token.line)] Error: invalid assignment target"
        case .missingClosingBrace(let token):
            return "[Line \(token.line)] Error: expected closing brace after block"
        case .missingOpenParenForIfStatement(let token):
            return "[Line \(token.line)] Error: expected left parenthesis after `if`"
        case .missingCloseParenForIfStatement(let token):
            return "[Line \(token.line)] Error: expected right parenthesis after `if` condition"
        case .missingOpenParenForWhileStatement(let token):
            return "[Line \(token.line)] Error: expected left parenthesis after `while`"
        case .missingCloseParenForWhileStatement(let token):
            return "[Line \(token.line)] Error: expected right parenthesis after `while` condition"
        case .missingOpenParenForForStatement(let token):
            return "[Line \(token.line)] Error: expected left parenthesis after `for`"
        case .missingCloseParenForForStatement(let token):
            return "[Line \(token.line)] Error: expected right parenthesis after `for` clauses"
        case .missingSemicolonAfterForLoopCondition(let token):
            return "[Line \(token.line)] Error: expected semicolon after `for` loop condition"
        case .missingClassName(let token):
            return "[Line \(token.line)] Error: expected class name"
        case .missingOpenBraceBeforeClassBody(let token):
            return "[Line \(token.line)] Error: expected open brace before class body"
        case .missingFunctionName(let token):
            return "[Line \(token.line)] Error: expected function name"
        case .missingOpenParenForFunctionDeclaration(let token):
            return "[Line \(token.line)] Error: expected open paren after function name"
        case .missingParameterName(let token):
            return "[Line \(token.line)] Error: expected parameter name"
        case .missingOpenBraceBeforeFunctionBody(let token):
            return "[Line \(token.line)] Error: expected open brace before function body"
        case .missingCloseParenAfterArguments(let token):
            return "[Line \(token.line)] Error: expected right parenthesis after arguments"
        case .missingIdentifierAfterDot(let token):
            return "[Line \(token.line)] Error: expected identifer after dot"
        case .missingSuperclassName(let token):
            return "[Line \(token.line)] Error: expected superclass name"
        case .missingDotAfterSuper(let token):
            return "[Line \(token.line)] Error: expected dot after super"
        case .expectedSuperclassMethodName(let token):
            return "[Line \(token.line)] Error: expected superclass method name"
        }
    }
}