Module diagnostics 

Structs

ParseError

A structured parse error with human-friendly messages and source context.

Functions

build_context 🔒

Build context string showing input up to the error, truncated to ~40 chars.

ceil_char_boundary 🔒

Smallest byte index >= pos that is a char boundary.

classify_token 🔒

Classify the token found at a byte offset in the source.

convert_pest_error 🔒

Convert a pest error into a human-friendly ParseError.

count_brackets 🔒

Count opening and closing brackets in source, respecting strings and comments. Returns ((parens, braces, brackets), (parens, braces, brackets))

detect_common_mistakes 🔒

Detect common R mistakes and return a tailored ParseError.

detect_unterminated_string 🔒

Detect unterminated strings in the source.

extract_for_parens 🔒

Extract the content inside for (...) parentheses, if present.

find_unmatched_open 🔒

Find the line and column of the first unmatched opening bracket.

floor_char_boundary 🔒

Largest byte index <= pos that is a char boundary.

humanize_rule 🔒

Map a pest grammar rule to a human-readable description.

is_inside_call_or_vector 🔒

Heuristic: is the error position inside a function call or c() vector?

line_col_to_byte_offset 🔒

Compute byte offset into source given 1-based line and 1-based column.

suggest_from_expected 🔒

Try to suggest a fix based on what was expected.

token_length_at 🔒

Compute the byte length of the token at the given offset for span highlighting.