Crate print_break 

print-break

A simple debugging macro that pretty-prints variables and pauses execution. No debugger needed - just prints to stderr and waits for Enter.

Features

• Pretty-prints any Debug type
• Auto-detects and formats JSON, TOML, YAML strings
• Shows file:line location
• Pauses execution until you press Enter
• Compiles to nothing in release builds
• Disable at runtime with PRINT_BREAK=0
• Interactive: Enter=continue, q=quit, s=skip remaining

Usage

use print_break::print_break;

let x = 42;
let name = "ferris";
let json = r#"{"user": "alice", "id": 123}"#;

print_break!(x, name, json);

Environment Variables

• PRINT_BREAK=0 - Disable all breakpoints
• PRINT_BREAK=1 - Enable breakpoints (default)
• PRINT_BREAK_DEPTH=N - Max nesting depth before collapsing (default: 4)

Interactive Controls

When paused at a breakpoint:

• Enter - Continue to next breakpoint
• q - Quit the program immediately
• s - Skip all remaining breakpoints

Macros

print_break

Pretty-prints variables and pauses execution until Enter is pressed.

print_break_if

Conditional breakpoint - only triggers if condition is true.

Structs

BorderStyle

Border style characters

Colors

ANSI color codes for terminal output