Errors

Parser

ParserError = Allocator.Error || error{ NoLanguage, Aborted }

• NoLanguage — parse* called before setLanguage.
• Aborted — reserved for cancelled parses.
• OutOfMemory — propagate; all partial state is cleaned up.

Syntax errors never appear here — they become tree nodes (see below).

Language

Language.Error = error{ IncompatibleAbiVersion, InvalidSymbol }

• IncompatibleAbiVersion — tables target an ABI outside 13–15.

Query

QueryError = Allocator.Error || QueryParseError || error{ InvalidLanguage }
QueryParseError = error{ OutOfMemory, UnexpectedEof, UnexpectedToken, InvalidSyntax, InvalidPredicate }

• InvalidLanguage — compileQuery without a language set.
• The parse errors pinpoint malformed query source; typos in #predicate? names are InvalidPredicate.

Tree-level error inspection

tree.hasError() / node.hasError() / node.isError() / node.isMissing()

Related pages

Error Recovery, Troubleshooting