diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 25 |
1 files changed, 25 insertions, 0 deletions
@@ -33584,6 +33584,31 @@ is that arrow keys (and other special command keys) are represented, by a VT100-compatible terminal or terminal emulator, as special sequences of bytes beginning with ESC (known as "escape sequences"). +.SS* Reading Forms Directly from the Terminal + +The listener is currently line oriented. There is, however, support for +accepting input which may span multiple lines and come in a large +quantity. + +If the +.code :read +keyword is entered into the listener, it will temporarily suspend +interactive editing and allow the \*(TL parser to read +directly from standard input. The reading stops when an error occurs, +or EOF is indicated by entering Ctrl-D. + +In direct parsing mode, each expression which is read is evaluated, but its +value is not printed. However, the value of the last form evaluated is returned +to the interactive listener, which prints the value and accepts it as if +it as the result value of the +.code :read +command. + +Note that none of the material read from the terminal is entered into the +interactive history. Only the +.code :read +command which triggers this parsing mode appears in the history. + .SH* DEBUGGER \*(TX has a simple, crude, built-in debugger. The debugger is invoked by adding the |