pub fn pointer_to_fhirpath(pointer: &str) -> StringExpand description
Renders an RFC 6901 JSON pointer as a dotted FHIRPath-style expression
rooted at ViewDefinition, e.g. /select/0/column/1/path becomes
ViewDefinition.select[0].column[1].path, and the document root ("")
becomes plain ViewDefinition.
This is the shape $sql-run’s 422 response puts in
OperationOutcome.issue.expression (crate::error::ServerError) so a
client can jump straight to the offending node without knowing JSON
Pointer syntax — and it’s pub so the /ui/sql/view-definitions/lint
handler can reuse it for the same purpose in the editor.
Each /-separated pointer segment either names an array index (all
ASCII digits — a ViewDefinition document never has an object key that is
itself numeric, so this can’t misfire) and becomes a [N] suffix on the
segment before it, or names an object key and becomes a .key suffix,
after undoing RFC 6901’s own escaping (~1 → /, then ~0 → ~, in
that order — reversing the encoding, which escapes ~ before /).