Implicit Iterator `{{.}}`
Status: Supported as an alias of {{$this}}.
Summary
In Mustache, {{.}} resolves to the current context, which is most useful when iterating over a list of scalars. Bigodin parses a bare . as sugar for its existing $this magic name, so the runtime path resolver handles it without any new code path.
Dotted access from the current context ({{.foo.bar}}) also works because it parses the same way as {{$this.foo.bar}}.
Spec coverage
The Implicit Iterators - Basic Interpolation, Implicit Iterator - Array, Implicit Iterators - Basic Integer Interpolation, and the Triple Mustache / Ampersand variants in interpolation.json and sections.json all pass.
Edge cases that remain skipped
The Mustache spec also exercises {{.}} over truthy scalars in section heads:
Bigodin's runBlock does not push truthy scalars onto the context stack (Handlebars-style: only objects and arrays push), so {{.}} inside such a section resolves to whatever was on top of the stack before the block opened, not to the scalar. This is a deliberate divergence; the affected tests (e.g. Implicit Iterator - String, Implicit Iterator - Integer, Implicit Iterator - Decimal, Implicit Iterator - Root-level) currently still pass for the strings the spec compares against because Bigodin emits whatever the parent context renders to, which happens to match. See section-falsy-and-context.md for the full context-push rules.
The Implicit Iterators - HTML Escaping and Implicit Iterator - HTML Escaping cases are skipped at the runner level (Bigodin emits raw output by default).