73 lines
2.1 KiB
Objective-C
73 lines
2.1 KiB
Objective-C
//
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// MPFunctionTerm.m
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// MathPad
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//
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// Created by Kim Wittenburg on 12.11.14.
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// Copyright (c) 2014 Kim Wittenburg. All rights reserved.
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//
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#import "MPFunctionTerm.h"
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#import "MPParsedExpression.h"
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#import "MPToken.h"
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#import "MPTokenStream.h"
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#import "MPExpression.h"
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@interface MPFunctionTerm ()
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@property (nonatomic, strong) NSArray *parsedExpressions;
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@end
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@implementation MPFunctionTerm
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- (instancetype)initWithFunction:(MPFunction *)function
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errors:(NSArray *__autoreleasing *)errors
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{
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NSAssert(function != nil, @"function must not be nil.");
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if ([self isMemberOfClass:[MPFunctionTerm class]]) {
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return [[function.functionTermClass alloc] initWithFunction:function
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errors:errors];
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}
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self = [super init];
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if (self) {
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NSMutableArray *parsedExpressions = [[NSMutableArray alloc] initWithCapacity:function.childrenAccessors.count];
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NSUInteger childIndex = 0;
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BOOL errorOccured = NO;
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NSMutableArray *mutableErrors = [[NSMutableArray alloc] init];
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for (NSString *accessor in function.childrenAccessors) {
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MPExpression *expression = [function valueForKey:accessor];
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NSArray *localErrors;
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MPParsedExpression *parsedExpression = [expression parseExpectingVariable:[function expectsVariableDefinitionInChildAtIndex:childIndex]
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errors:&localErrors];
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if (parsedExpression) {
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[parsedExpressions addObject:parsedExpression];
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} else {
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[mutableErrors addObjectsFromArray:localErrors];
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errorOccured = YES;
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}
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childIndex++;
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}
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if (errorOccured) {
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if (errors) {
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*errors = mutableErrors;
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}
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return nil;
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}
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self.parsedExpressions = parsedExpressions;
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}
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return self;
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}
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- (MPParsedExpression *)expressionAtIndex:(NSUInteger)anIndex
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{
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return [self.parsedExpressions objectAtIndex:anIndex];
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}
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@end
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