Standard Library

Prelude

Names available in every Leaf source file without explicit import.

Interfaces

• PartialEq[T], Eq[T], Hash, Comparable[T], ToString, Iterator[T], Iterable[T]

Types

• Built-in Enums: Ordering, Option[T], Result[T, E], GeneratorResult[Y, R], IoError, Generator[Y, R, N]
• Tuples
• Built-in Collections: List[T], Map[K, V], Set[T], Buffer

Functions and Methods

• Built-in Functions: print, println, readln, panic, toList, toMap, toSet
• Interface Conformance Summary
• Primitive Type Methods: bool, byte, int, uint, float, str

I/O

The io module must be imported explicitly via use @std.io. Provides readFile, writeFile, appendFile, readBytes, and writeBytes.

Environment

The env module must be imported explicitly via use @std.env. Provides args, vars, and exit for accessing command-line arguments, environment variables, and process termination.

Topic Cross-References

• Interfaces: defined here (interfaces.md), implementation rules in lang/structs/core.md (§4.5)
• Enums: built-in enums here (types.md), enum definition in lang/structs/data-types.md (§4.6), pattern matching in lang/types.md (§3.1)
• Collections: API here (types.md), syntax in lang/structs/data-types.md (§4.8), destructuring in lang/semantics/patterns.md (§2.14)
• Tuples: details here (types.md), definition in lang/structs/data-types.md (§4.7)