Emitter

The emitter converts IR into CSharpAst, then the printer turns that into C#.

Current architecture

IR
  -> semantic helpers
  -> CSharpAst builders
  -> printer
  -> .cs text

Important current fact

The emitter is AST-only now.

The old mixed pipeline of AST plus mid-pipeline C# text shims is no longer the supported architecture.

Major areas

• type emission
• expression emission
• statement emission
• module assembly
• imports and namespaces
• specialization and helper synthesis

Where the hard problems usually live

Emitter bugs usually show up in clusters like:

• overload specialization
• generic substitution at call sites
• wrapper/unwrapper normalization for unions and promises
• conversion of source-package semantics into backend-safe shapes

That is why emitter tests, goldens, and E2E fixtures remain one of the heaviest parts of the run-all suite.

Promise lowering

Promise constructors and chains are normalized before final emission so the emitter works with the normalized result type rather than stale wrapper shapes.