Module edit 

Shared edit engine: byte-offset conversion, content replacement, syntax validation, and auto-backup orchestration.

Used by write, edit_symbol, edit_match, and batch commands.

Structs

DryRunResult

Result of a dry-run diff computation.

WriteResult

Result of the write → format → validate pipeline.

Functions

auto_backup

Snapshot the file into the backup store before mutation.

compute_diff_info

Compute diff info between before/after content for UI metadata. Returns a JSON value with before, after, additions, deletions. For files >512KB, omits full content and returns only counts.

dry_run_diff

Compute a unified diff between original and proposed content, plus syntax validation.

is_dry_run

Extract the dry_run boolean from request params.

line_col_to_byte

Convert 0-indexed line/col to a byte offset within source.

replace_byte_range

Replace bytes in [start..end) with replacement.

validate_syntax

Validate syntax of a file using a fresh FileParser (D023).

validate_syntax_str

Validate syntax of an in-memory string without touching disk.

wants_diff

Check if the caller requested diff info in the response.

write_format_only

Format an already-written file (no re-write) without re-writing or validating. Returns Ok(true) if formatting was applied, Ok(false) if skipped.

write_format_validate

Write content to disk, auto-format, then validate syntax.