Struct InlayHintConfig 

pub struct InlayHintConfig {
    pub show_type_hints: bool,
    pub show_parameter_hints: bool,
    pub show_variable_type_hints: bool,
    pub show_return_type_hints: bool,
    pub show_chain_hints: bool,
    pub show_binding_kind_hints: bool,
}

Configuration for inlay hints

Fields

show_type_hints: bool

show_parameter_hints: bool

show_variable_type_hints: bool

Show : type hints after variable names in let/var/const without explicit annotations

show_return_type_hints: bool

Show -> type hints after function parameter lists without explicit return annotations

show_chain_hints: bool

W2.4 / 1.27: render the inferred type after every intermediate .method() call in a method chain (e.g. xs.map(f).filter(g).sum() → hint after .map(f) and .filter(g)).

show_binding_kind_hints: bool

W2.4 / 1.25 + LSP-I (R8 W11): render an approximate BindingStorageClass label after let/var bindings. The five ADR-006 §2 categories — [Direct] / [UniqueHeap] / [SharedCow] / [SharedAtomic] / [SharedAtomicMut] — are rendered as best-effort labels from the LSP-side AST (the authoritative classifier lives in the bytecode compiler at crates/shape-vm/src/type_tracking.rs:286

• the MIR borrow solver). Always surfaced with the [… approx] qualifier so the user knows it is not the compiler verdict.

Standing pattern (binding 2026-05-26): Shape-unique inlay hints (chain hints, binding-storage-class hints, anything not Rust/TS idiomatic) ship opt-in default-OFF under the shape.inlayHints.* namespace. The canonical LSP key for this toggle is shape.inlayHints.bindingStorageClass.enable: boolean (Decision 2 ratify). The legacy bindingKindHints key (W2.4 / 1.25 vintage) is accepted as an alias for backward compatibility; future inlay-hint sub-clusters should follow the same opt-in default-OFF shape.

Implementations

impl InlayHintConfig

pub fn from_lsp_settings(value: Option<&Value>) -> Self

W2.4 / 1.70 + LSP-I (R8 W11): parse an InlayHintConfig from a workspace/configuration JSON value. Honors keys such as shape.inlayHints.enable, shape.inlayHints.typeHints, shape.inlayHints.parameterHints, shape.inlayHints.variableTypeHints, shape.inlayHints.returnTypeHints, shape.inlayHints.chainHints, shape.inlayHints.bindingStorageClass.enable (canonical Decision 2 key for binding-storage-class hints), and shape.inlayHints.bindingKindHints (legacy W2.4 / 1.25 alias, retained for backward compatibility).

snake_case aliases (e.g. chain_hints, binding_storage_class) are also accepted. Unknown keys are ignored. Returns Default::default() when the input is None or contains no recognized keys.

Trait Implementations

impl Clone for InlayHintConfig

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for InlayHintConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for InlayHintConfig

fn default() -> Self

Returns the “default value” for a type.