Crate sql_dialect_fmt_lsp 

LSP feature logic for Snowflake SQL: formatting, diagnostics, hover, folding, document symbols, completion, and semantic tokens.

This module is deliberately transport-free (it never touches stdio or an lsp-server connection), so every feature is a pure &str -> data function that is unit-testable. The binary crate is the thin adapter that wires these into a language server.

Positions follow the LSP convention: zero-based lines and UTF-16 column offsets.

Structs

LintOptions

LSP-only lint knobs layered on top of parser diagnostics.

Enums

LintCode

PositionEncoding

LSP position encoding negotiated with the client.

Functions

apply_change

Apply one textDocument/didChange content change to text, returning the new document.

apply_change_with_encoding

Encoding-aware variant of apply_change.

completion_items

Static SQL completion items for textDocument/completion.

diagnostic_lint_code

diagnostics

Diagnostics for textDocument/publishDiagnostics: both lexer and parser errors. Neither stage ever fails, so this is the set of recovered errors (empty for clean input).

diagnostics_with_encoding

Encoding-aware variant of diagnostics.

diagnostics_with_lint_options

Options-, lint-, and encoding-aware variant of diagnostics.

diagnostics_with_options

Options- and encoding-aware variant of diagnostics.

document_symbols

Document symbols for textDocument/documentSymbol: one outline item per top-level statement.

document_symbols_with_encoding

Encoding-aware variant of document_symbols.

folding_ranges

Folding ranges for textDocument/foldingRange: one region per multi-line top-level statement, so an editor can collapse each statement in a script. The CST’s root children are the statements.

format_edits

The edits to apply for textDocument/formatting: a single whole-document replacement, or an empty list when the input is already formatted (so the editor records no change).

format_edits_with_encoding

Encoding-aware variant of format_edits.

format_range_edits

The edits to apply for textDocument/rangeFormatting: reformat only the statements the range touches, as one minimal replacement, or an empty list when nothing changes.

format_range_edits_with_encoding

Encoding-aware variant of format_range_edits.

hover

Hover information for textDocument/hover: the keyword/type/symbol description at position, rendered as Markdown with an optional docs link, scoped to the hovered token’s range.

hover_with_encoding

Encoding-aware variant of hover.

semantic_tokens

The delta-encoded semantic tokens for textDocument/semanticTokens/full.

semantic_tokens_range_with_encoding

The delta-encoded semantic tokens that intersect range.

semantic_tokens_with_encoding

Encoding-aware variant of semantic_tokens.

token_modifiers

The semantic-token modifier legend, mirrored from semantic::SemanticTokenModifiers::LEGEND. A token’s token_modifiers_bitset is decoded bit-by-bit against this slice, so it too must match the highlighter.

token_types

The semantic-token type legend, mirrored from the single source of truth in sql-dialect-fmt-highlight (semantic::SemanticTokenType::LEGEND). A token’s token_type field is an index into this slice, so the order here is the contract with the editor (declared in the server’s capabilities) and must equal the highlighter’s legend — otherwise an editor would decode our token types against the wrong names.