Crate lc_embeddings 

Embedding model implementations for LangChainRust.

Provides embedding generation via multiple backends:

• OpenAI (text-embedding-ada-002, text-embedding-3-small/large)
• DeepSeek
• Qwen (Alibaba Cloud / DashScope)
• Local: BagOfWordsEmbeddings (always available) and LocalEmbeddings (ONNX, feature-gated)
• MockEmbeddings for testing

Structs

BagOfWordsEmbeddings

Lightweight local embedding (word-frequency hash + L2 normalization)

DeepSeekEmbeddings

DeepSeek embeddings client for generating vector embeddings.

DeepSeekEmbeddingsConfig

Configuration for DeepSeek embeddings API.

MockEmbeddings

Mock embeddings for testing purposes.

OpenAIEmbeddings

OpenAI Embeddings client

OpenAIEmbeddingsConfig

OpenAI Embeddings configuration

QwenEmbeddings

Qwen embeddings client for generating vector embeddings.

QwenEmbeddingsConfig

Configuration for Qwen embeddings API.

Enums

EmbeddingError

Embedding error type

Constants

DEEPSEEK_EMBED_MODEL

Default embedding model for DeepSeek.

QWEN_EMBED_MODEL

Default embedding model for Qwen.

Traits

Embeddings

Embedding model trait

Functions

cosine_similarity

Compute cosine similarity between two vectors.

Type Aliases

LocalEmbeddings

Without the local-embeddings feature, LocalEmbeddings is a type alias for BagOfWordsEmbeddings, maintaining backward compatibility.