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Stop context stack climbing with "." prefix

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This commit is contained in:
Adam Fowler
2021-03-24 11:12:38 +00:00
parent f7bd02267e
commit 7ebd84a328
2 changed files with 16 additions and 1 deletions
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7
Sources/HummingbirdMustache/Template+Render.swift
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@@ -138,12 +138,17 @@ extension HBMustacheTemplate {
// work out which object to access. "." means the current object, if the variable name is ""
// and we have a transform to run on the variable then we need the context object, otherwise
// the name is split by "." and we use mirror to get the correct child object
// the name is split by "." and we use mirror to get the correct child object. If we cannot find
// the root object we look up the context stack until we can find one with a matching name. The
// stack climbing can be disabled by prefixing the variable name with a "."
let child: Any?
if name == "." {
child = context.stack.last!
} else if name == "", transform != nil {
child = context.sequenceContext
} else if name.first == "." {
let nameSplit = name.split(separator: ".").map { String($0) }
child = _getChild(named: nameSplit[...], from: context.stack.last!)
} else {
let nameSplit = name.split(separator: ".").map { String($0) }
child = _getChildInStack(named: nameSplit[...], from: context.stack)