# Struct ethcore::trace::NoopVMTracer [−] [src]

    pub struct NoopVMTracer;

Nonoperative VM tracer. Does not trace anything.

## Trait Implementations

### `impl VMTracer for NoopVMTracer`
[src]

#### `fn trace_prepare_execute(&mut self,
_pc: usize,
_instruction: u8,
_gas_cost: &U256)
-> bool`

Trace the preparation to execute a single instruction.

#### `fn trace_executed(&mut self,
_gas_used: U256,
_stack_push: &[U256],
_mem_diff: Option<(usize, &[u8])>,
_store_diff: Option<(U256, U256)>)`

Trace the finalised execution of a single instruction.

#### `fn prepare_subtrace(&self, _code: &[u8]) -> Self`

Spawn subtracer which will be used to trace deeper levels of execution.

#### `fn done_subtrace(&mut self, _sub: Self)`

Spawn subtracer which will be used to trace deeper levels of execution.

#### `fn drain(self) -> Option<VMTrace>`

Consumes self and returns all VM traces.

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