ced - interactive C REPL

DESCRIPTION

ced is an interactive C REPL. Type a line, press Return, and see the result
immediately. A minimal valid C program is maintained behind the scene.

DEMO

BEHAVIOR

On startup, ced creates a skeleton file containing

#include <stdio.h>
int main() {
return 0;
}

and positions you at line 3 (inside main). All line numbers are 1-indexed.

Enter a statement without a semicolon and press Return to run it
immediately. If the line is not a preprocessor directive, semicolon will be
appended automatically.

To continue a statement across multiple lines, end a line with ; or { and
press Return. The following line will be joined to the previous one. It
won't be executed until you submit the normal statement.

To split a statement across lines while preserving the line break, end a
line with \ , press Enter and continue on the next.

When a line triggers compilation, only output produced by that line is shown,
previous output is not repeated. Use :run to re-execute and see the full
output.

ERROR RECOVERY

If compilation fails, ced discards the offending change and restores the
previous working source. Use :debug to inspect the failed code that
triggered the error.

COMMANDS

:l, :list      print current source with line numbers (+ is the active line)  
:d, :debug     print source from last compile attempt  
:r, :run       compile and run current source  
:N             move to line N  
:clear, :reset restore the initial skeleton  

REQUIREMENTS

/bin/sh, tcc, awk, and standard POSIX utilities (head, tail, cp).
For basic line editing and history support, wrap with rlwrap:

rlwrap ced