bun run repl

CLAUDE.md

@@ -51,9 +51,9 @@ When exploring Shrimp, focus on these key files in order:
 
 3. **src/compiler/compiler.ts** - CST to bytecode transformation
 
-   - See how functions become labels in `fnLabels` map
-   - Check short-circuit logic for `and`/`or` (lines 267-282)
-   - Notice `TRY_CALL` emission for bare identifiers (line 152)
+   - See how functions emit inline with JUMP wrappers
+   - Check short-circuit logic for `and`/`or`
+   - Notice `TRY_CALL` emission for bare identifiers
 
 4. **packages/ReefVM/src/vm.ts** - Bytecode execution
    - See `TRY_CALL` fall-through to `CALL` (lines 357-375)
@@ -211,14 +211,23 @@ Implementation files:
 
 ## Compiler Architecture
 
-**Function compilation strategy**: The compiler doesn't create inline function objects. Instead it:
+**Function compilation strategy**: Functions are compiled inline where they're defined, with JUMP instructions to skip over their bodies during linear execution:
 
-1. Generates unique labels (`.func_0`, `.func_1`) for each function body (compiler.ts:137)
-2. Stores function body instructions in `fnLabels` map during compilation
-3. Appends all function bodies to the end of bytecode with RETURN instructions (compiler.ts:36-41)
-4. Emits `MAKE_FUNCTION` with parameters and label reference
+```
+JUMP .after_.func_0        # Skip over body during definition
+.func_0:                   # Function body label
+  (function body code)
+  RETURN
+.after_.func_0:            # Resume here after jump
+MAKE_FUNCTION (x) .func_0  # Create function object with label
+```
 
-This approach keeps the main program linear and allows ReefVM to jump to function bodies by label.
+This approach:
+- Emits function bodies inline (no deferred collection)
+- Uses JUMP to skip bodies during normal execution flow
+- Each function is self-contained at its definition site
+- Works seamlessly in REPL mode (important for `vm.appendBytecode()`)
+- Allows ReefVM to jump to function bodies by label when called
 
 **Short-circuit logic**: ReefVM has no AND/OR opcodes. The compiler implements short-circuit evaluation using: