docs(language): document user-defined functions#55
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Add a Functions guide page covering fn declarations, let-bindings, calling, the relationship to the built-in functions, and restrictions. Link it from the index and Data Expressions pages, and drop the removed bare 'tip_slot' identifier form. Renumber the trailing pages. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Adds a Functions guide page for the user-defined functions feature landing in tx3-lang/tx3#311.
Changes
language/functions.mdpage: declaringfn,let-bindings in the body, calling, the relationship to the built-in functions, and the restrictions (top-level only, non-recursive, pure — no access to tx state).index.mdx(under "What you compute") and fromdata.md's built-in functions section.tip_slotidentifier form fromdata.md(the feature reframes builtins as call-only functions).Pairs with the normative spec update in tx3-lang/tx3#311 (
specs/v1beta0/).🤖 Generated with Claude Code