add ContractExecutor dispatch enum (Aot + Emu)#1608
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Adds a public dispatch enum that lets a single call site choose between
the AOT executor and the sierra-emu interpreter at runtime, without
forcing every caller to maintain its own match.
- `pub enum ContractExecutor { Aot(AotContractExecutor), Emu(EmuContractInfo) }`,
with `Emu` gated on the `sierra-emu` feature added in the previous PR.
- `From` impls for both variants.
- `ContractExecutor::run` dispatches: the `Aot` arm calls
`AotContractExecutor::run` directly; the `Emu` arm constructs a
`sierra_emu::VirtualMachine`, wraps the cairo-native syscall handler in
`SierraEmuSyscallBridge`, and converts the result.
- `EmuContractInfo` carries `Arc<Program>` so the program is shared across
invocations rather than cloned per call.
This is the same dispatch shape that downstream consumers (e.g. the
blockifier in starkware-libs/sequencer) currently maintain locally; with
this PR they can drop their copy and import `cairo_native::ContractExecutor`.
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Summary
Adds a public dispatch enum that lets a single call site choose between the AOT executor and the sierra-emu interpreter at runtime, without forcing every caller to maintain its own match.
Important
Stacked on top of #1607 (SierraEmuSyscallBridge). Merge #1607 first; the diff for this PR will then narrow to just the new
contract_executormodule.Changes
src/executor/contract_executor.rs— new module:pub enum ContractExecutor { Aot(AotContractExecutor), Emu(EmuContractInfo) }, withEmugated on thesierra-emufeature added in add SierraEmuSyscallBridge for cairo-native ↔ sierra-emu interop #1607.Fromimpls for both variants.ContractExecutor::rundispatches: theAotarm callsAotContractExecutor::rundirectly; theEmuarm constructs asierra_emu::VirtualMachine, wraps the cairo-native syscall handler inSierraEmuSyscallBridge, and converts the result.EmuContractInfocarriesArc<Program>so the program is shared across invocations rather than cloned per call.Test plan
--features sierra-emuContext
This is the dispatch shape that downstream consumers (e.g. the blockifier in
starkware-libs/sequencer) currently maintain locally; with this PR they can drop their copy and importcairo_native::ContractExecutor.