Struct BindContext 

pub struct BindContext {
    pub params: HashMap<SmolStr, TypedValue>,
    pub env: HashMap<SmolStr, TypedValue>,
}

Bind-time context: parameter values and environment variables.

The Cypher evaluator is treated like a virtual machine — it accepts a query string plus two context maps that are resolved to literals during binding:

• params: $param placeholders → TypedValue
• env: env('KEY') lookups → TypedValue

Fields

params: HashMap<SmolStr, TypedValue>

env: HashMap<SmolStr, TypedValue>

Implementations

impl BindContext

pub fn empty() -> BindContext

pub fn with_params_json(params: Value) -> BindContext

Build a context with params from a serde_json::Value object.

use serde_json::json;
let ctx = BindContext::with_params_json(json!({"min_age": 25, "name": "Alice"}));

pub fn with_env_json(env: Value) -> BindContext

Build a context with env from a serde_json::Value object.

use serde_json::json;
let ctx = BindContext::with_env_json(json!({"DATA_DIR": "/data"}));

pub fn from_json(params: Value, env: Value) -> BindContext

Build a full context from two serde_json::Value objects.

pub fn with_params_str(json: &str) -> Result<BindContext, Error>

Build a context with params parsed from a JSON string.

Returns Err if the string is not valid JSON.

pub fn with_env_str(json: &str) -> Result<BindContext, Error>

Build a context with env parsed from a JSON string.

Returns Err if the string is not valid JSON.

pub fn from_json_str(params: &str, env: &str) -> Result<BindContext, Error>

Build a full context from two JSON strings.

Returns Err if either string is not valid JSON.