3 files changed, 8 insertions, 4 deletions
diff --git a/platform/darwin/src/MGLFillStyleLayer.h b/platform/darwin/src/MGLFillStyleLayer.h
index a159a924e6..90740223eb 100644
--- a/platform/darwin/src/MGLFillStyleLayer.h
+++ b/platform/darwin/src/MGLFillStyleLayer.h
@@ -218,7 +218,8 @@ MGL_EXPORT
 
 /**
  Name of image in sprite to use for drawing image fills. For seamless patterns,
- image width and height must be a factor of two (2, 4, 8, ..., 512).
+ image width and height must be a factor of two (2, 4, 8, ..., 512). Note that
+ zoom-dependent expressions will be evaluated only at integer zoom levels.
  
  You can set this property to an expression containing any of the following:
  
diff --git a/platform/darwin/src/MGLLineStyleLayer.h b/platform/darwin/src/MGLLineStyleLayer.h
index a7510142fc..32c8ece6c5 100644
--- a/platform/darwin/src/MGLLineStyleLayer.h
+++ b/platform/darwin/src/MGLLineStyleLayer.h
@@ -302,7 +302,10 @@ MGL_EXPORT
 /**
  Specifies the lengths of the alternating dashes and gaps that form the dash
  pattern. The lengths are later scaled by the line width. To convert a dash
- length to points, multiply the length by the current line width.
+ length to points, multiply the length by the current line width. Note that
+ GeoJSON sources with `lineMetrics: true` specified won't render dashed lines to
+ the expected scale. Also note that zoom-dependent expressions will be evaluated
+ only at integer zoom levels.
  
  This property is measured in line widths.
  
diff --git a/platform/darwin/src/MGLStyleLayer.mm.ejs b/platform/darwin/src/MGLStyleLayer.mm.ejs
index 42940083b5..3792906a53 100644
--- a/platform/darwin/src/MGLStyleLayer.mm.ejs
+++ b/platform/darwin/src/MGLStyleLayer.mm.ejs
@@ -121,7 +121,7 @@ namespace mbgl {
 - (void)set<%- camelize(property.name) %>:(NSExpression *)<%- objCName(property) %> {
     MGLAssertStyleLayerIsValid();
 
-<% if (property["property-function"]) { -%>
+<% if (isDataDriven(property)) { -%>
     auto mbglValue = MGLStyleValueTransformer<<%- valueTransformerArguments(property).join(', ') %>>().toPropertyValue<mbgl::style::DataDrivenPropertyValue<<%- valueTransformerArguments(property)[0] %>>>(<%- objCName(property) %>);
 <% } else { -%>
     auto mbglValue = MGLStyleValueTransformer<<%- valueTransformerArguments(property).join(', ') %>>().toPropertyValue<mbgl::style::PropertyValue<<%- valueTransformerArguments(property)[0] %>>>(<%- objCName(property) %>);
@@ -164,7 +164,7 @@ namespace mbgl {
 
 <% if (property.name === 'heatmap-color') { -%>
     auto mbglValue = MGLStyleValueTransformer<mbgl::Color, MGLColor *>().toPropertyValue<mbgl::style::HeatmapColorPropertyValue>(heatmapColor);
-<% } else if (property["property-function"]) { -%>
+<% } else if (isDataDriven(property)) { -%>
     auto mbglValue = MGLStyleValueTransformer<<%- valueTransformerArguments(property).join(', ') %>>().toPropertyValue<mbgl::style::DataDrivenPropertyValue<<%- valueTransformerArguments(property)[0] %>>>(<%- objCName(property) %>);
 <% } else { -%>
     auto mbglValue = MGLStyleValueTransformer<<%- valueTransformerArguments(property).join(', ') %>>().toPropertyValue<mbgl::style::PropertyValue<<%- valueTransformerArguments(property)[0] %>>>(<%- objCName(property) %>);