Module logic_loop 

The main REPL event loop - input handling, rendering, and evaluation dispatch.

State

Variable	Purpose
input_buf	The current line being typed
accumulated	Multiline buffer - grows until is_complete is true
cursor_pos	Cursor position in chars (not bytes)
history	Submitted input history, navigated with ↑/↓
history_idx	Current position in history (None = live input)
attached	Files evaluated into the env via :attach
scroll_offset	Output scroll position (0 = bottom, higher = older)

Multiline input

Lines are accumulated into accumulated until is_complete returns true and the last line does not end with { (a bare block opener waits for body). The prompt switches from >> to .. while accumulating. Esc cancels and clears the accumulator.

Evaluation flow

Enter key
  |
  |- starts with ':'  ──► handle_command
  |
  |- code input
       |
       |- not complete yet --> keep accumulating
       |
       |- complete --> eval_input --> output buffer

Functions

run_repl

Runs the REPL event loop until the user exits with Ctrl+C or :exit.