Crate ferrotorch_grammar 

Constrained-decoding grammar processors.

Submodules:

• schema — internal Schema enum and JSON-Schema parser (subset).
• state — JsonGrammar state machine that tracks where we are in the partially-emitted JSON value.
• json_schema — public JsonSchemaProcessor that wraps a tokenizer vocabulary and produces per-step token-allow masks for use with ferrotorch_cubecl::apply_token_mask_to_gpu.

REQ status (per .design/ferrotorch-grammar/lib.md)

REQ	Status	Evidence
REQ-1	SHIPPED	impl: pub mod json_schema; pub mod schema; pub mod state; + #[cfg(feature = "cuda")] pub mod gpu_dispatch; in lib.rs; non-test consumer: pub use ferrotorch_grammar as grammar; in ferrotorch-llama/src/lib.rs:156 makes the submodule tree reachable to every downstream model crate (grandfathered public API per goal.md S5).
REQ-2	SHIPPED	impl: pub use json_schema::{GrammarError, JsonSchemaProcessor, TokenMask}; + pub use schema::Schema; + pub use state::{BooleanEmissionStage, JsonGrammar}; + #[cfg(feature = "cuda")] pub use gpu_dispatch::{PackedVocab, compute_mask_gpu}; in lib.rs; non-test consumer: ferrotorch-llama/src/lib.rs:156 aliases the whole crate (grandfathered S5).
REQ-3	SHIPPED	impl: the re-export chain in lib.rs; non-test consumer: pub use ferrotorch_grammar as grammar; in ferrotorch-llama/src/lib.rs:156 documented at lines 150-155 is the literal alias that makes the entire public surface a member of ferrotorch_llama::grammar.

Re-exports

pub use json_schema::GrammarError;

pub use json_schema::JsonSchemaProcessor;

pub use json_schema::TokenMask;

pub use json_schema::TokenTransitionCache;

pub use schema::Schema;

pub use state::BooleanEmissionStage;

pub use state::JsonGrammar;

Modules

json_schema

Public JsonSchemaProcessor: token-level wrapper around JsonGrammar.

schema

Schema: a typed, internal representation of the supported JSON-Schema subset.

state

Character-level state machine over a JSON value matching a Schema.