Module source 

Source model: files, positions, and spans.

Conventions: positions are 1-based, and a span is a half-open interval (end is exclusive). Spans carry a typed FileId instead of a raw file index.

Structs

Position

A 1-based line/column position in a source file.

SourceFile

One source file in the program’s file registry.

Span

A half-open, 1-based source interval in one file.

Type Aliases

FileId

A typed ID referencing a SourceFile in the program’s file arena.