Feature: permit (most) reserved attributes names as property names #582
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dgkf
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Nov 26, 2025
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| prop <- function(object, name) { | ||
| .Call(prop_, object, name) | ||
| attr_name <- remap_reserved_names(name) | ||
| .Call(prop_, object, name, attr_name) | ||
| } |
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This is the primary change. attr_name was added as an additional parameter to prop_ (and prop_set_).
It only differs from name in cases when there's a clash with a reserved name, in which case it gets mangled, such as .__S7_prop_names__.
Attributes get remapped at this point so that they keep their user-facing name for all other purposes.
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dgkf
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Nov 26, 2025
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| attrs <- c( | ||
| list(class = class_dispatch(class), S7_class = class), | ||
| args[!has_setter], | ||
| with_remap_reserved_names(args[!has_setter]), | ||
| attributes(object) | ||
| ) | ||
| attrs <- attrs[!duplicated(names(attrs))] | ||
| attributes(object) <- attrs |
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When arguments are passed through new_object() they are assigned to attribute values directly, so they go through the same remapping for reserved names here.
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Closes #579
propandprop<-, I've remapped attribute names for use inRf_setAttribinprop_andprop_set_respectively.new_class, remaps attributes where they're assigned directly...as it raises a parse error when trying to use it viaobj@..., but this is an R syntax error and it would still work viaprop(obj, "..."). I'd probably lean toward even permitting this, but it seemed explicitly undesirable in Defining a property named "..." should not be allowed #442air, let me know if you'd like whitespace changes reverted.