Struct ErrorDecision 

pub struct ErrorDecision {
    pub severity: DiagnosticSeverity,
    pub code: Option<&'static str>,
    pub quickfix: Quickfix,
    pub docs: DocsLink,
}

The explicit presentation decision for one ParseErrorKind.

Every kind decides all three axes. The wildcard-free match in decision_for is the compile-time ratchet: a new error kind does not build until someone chooses its severity, its diagnostic code, and whether a quickfix is safe — tests/locks.rs pins the runtime side.

Fields

severity: DiagnosticSeverity

code: Option<&'static str>

Stable kebab-case code that code actions and clients key on.

quickfix: Quickfix

docs: DocsLink

Whether the diagnostic links a quickguide lesson via codeDescription.