Enum HostFunction 

pub enum HostFunction {
    Log {
        level: LogLevel,
        message: String,
    },
    ReadColumn {
        name: String,
    },
    EmitRow {
        row: Value,
    },
    GetEnv {
        key: String,
    },
    HttpRequest {
        url: String,
        method: HttpMethod,
        body: Option<String>,
    },
}

The full host-function set.

Variants map 1:1 to WASM imports that JS scripts can call. The enum is a convenience for dispatch; individual hooks live on the HostContext trait so callers only implement the pieces they need.

Variants

Log

console.log / console.error bridge.

Fields

level: LogLevel

message: String

ReadColumn

Read a named column from the current row batch. Wired by hosts that run the engine in a tabular context; a no-op otherwise.

Fields

name: String

EmitRow

Emit a transformed row. Wired by hosts that run the engine in a tabular context.

Fields

row: Value

GetEnv

Read an allow-listed environment variable.

Fields

key: String

HttpRequest

HTTP out-call. Gated behind the host-http cargo feature in afterburner-wasi.

Fields

url: String

method: HttpMethod

body: Option<String>

Trait Implementations

impl Clone for HostFunction

fn clone(&self) -> HostFunction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HostFunction

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

Formats the value using the given formatter.