1 files changed, 62 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLStyleAttributeFunction.mm b/platform/darwin/src/MGLStyleAttributeFunction.mm
index 7eec5c2369..337e299127 100644
--- a/platform/darwin/src/MGLStyleAttributeFunction.mm
+++ b/platform/darwin/src/MGLStyleAttributeFunction.mm
@@ -4,6 +4,68 @@
 #import "MGLStyleAttributeValue_Private.h"
 #import "MGLStyleAttributeFunction_Private.h"
 
+@implementation MGLStyleValue
+
++ (instancetype)valueWithRawValue:(id)rawValue {
+    return [MGLStyleConstantValue valueWithRawValue:rawValue];
+}
+
++ (instancetype)valueWithBase:(CGFloat)base stops:(NSDictionary *)stops {
+    return [MGLStyleFunction functionWithBase:base stops:stops];
+}
+
++ (instancetype)valueWithStops:(NSDictionary *)stops {
+    return [MGLStyleFunction functionWithStops:stops];
+}
+
+@end
+
+@implementation MGLStyleConstantValue
+
++ (instancetype)valueWithRawValue:(id)rawValue {
+    return [[self alloc] initWithRawValue:rawValue];
+}
+
+- (instancetype)initWithRawValue:(id)rawValue {
+    if (self = [super init]) {
+        _rawValue = rawValue;
+    }
+    return self;
+}
+
+@end
+
+@implementation MGLStyleFunction
+
++ (instancetype)functionWithBase:(CGFloat)base stops:(NSDictionary *)stops {
+    return [[self alloc] initWithBase:base stops:stops];
+}
+
++ (instancetype)functionWithStops:(NSDictionary *)stops {
+    return [[self alloc] initWithBase:1 stops:stops];
+}
+
+- (instancetype)init {
+    if (self = [super init]) {
+        _base = 1;
+    }
+    return self;
+}
+
+- (instancetype)initWithBase:(CGFloat)base stops:(NSDictionary *)stops {
+    if (self = [self init]) {
+        _base = base;
+        _stops = stops;
+    }
+    return self;
+}
+
+@end
+
+
+
+
+
 @interface MGLStyleAttributeFunction() <MGLStyleAttributeValue_Private>
 @end