62 lines
1.3 KiB
Objective-C
62 lines
1.3 KiB
Objective-C
//
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// MPNumber.m
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// MathPad
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//
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// Created by Kim Wittenburg on 09.10.14.
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// Copyright (c) 2014 Kim Wittenburg. All rights reserved.
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//
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#import "MPNumber.h"
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@implementation MPNumber {
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NSRange _range;
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}
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- (instancetype)init
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{
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self = [super init];
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if (self) {
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}
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return self;
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}
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- (instancetype)initWithTokenStream:(MPTokenStream *)tokenStream
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{
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self = [self init];
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if (self) {
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[tokenStream beginIgnoringWhitespaceTokens];
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MPToken *token = tokenStream.currentToken;
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if (token.tokenType == MPNumberToken) {
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self.number = [NSDecimalNumber decimalNumberWithString:token.stringValue locale:[NSLocale currentLocale]];
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_range = token.range;
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} else {
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@throw [NSException exceptionWithName:NSInternalInconsistencyException reason:@"Expected Number" userInfo:nil];
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}
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[tokenStream currentTokenConsumed];
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[tokenStream endIgnoringOrAcceptingWhitespaceTokens];
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}
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return self;
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}
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- (NSRange)range
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{
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return _range;
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}
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- (BOOL)validate:(MPParseError *__autoreleasing *)error
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{
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return YES;
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}
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- (NSDecimalNumber *)evaluate
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{
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return self.number;
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}
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- (NSArray *)expressionElements
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{
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return @[[self.number descriptionWithLocale:[NSLocale currentLocale]]];
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}
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@end
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