Reference

Data Types

Core Mutant types, including primitives, floats, structs, enums, and collection types.

Source repo: aoiflux/mutant
Source path: docs/BYTECODE_IR.md
Last reviewed: 2026-07-03
Freshness tier: high

Mutant uses a compact type system that keeps the language easy to reason about while remaining flexible for scripting and security workflows.

Primitive Types

string: UTF-8 encoded text values.
integer: Signed 64-bit integer values.
float: Floating-point values for fractional arithmetic.
bool: Boolean truth values.

Structured Types

struct: Named record values with declared fields.
enum: Named tagged values with ordinal semantics.

Composite Types

list: Ordered heterogeneous collections.
hashMap: Key-value collections for structured data.

Type Notes

Strings are read-only byte sequences at the language level.
Struct fields are accessed with dot notation after construction.
Enum tags are compact and ordinal-based, which keeps pattern-style modeling simple.

Canonical Source

This page is adapted from upstream docs/BYTECODE_IR.md.