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Diffstat (limited to 'examples/jtclsh.tcl')
| -rw-r--r-- | examples/jtclsh.tcl | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/examples/jtclsh.tcl b/examples/jtclsh.tcl new file mode 100644 index 0000000..b384717 --- /dev/null +++ b/examples/jtclsh.tcl @@ -0,0 +1,58 @@ +# Simple example of how the history extension +# can be used to provide line editing and history + +# Build jimsh with the history extension and enable line editing (the default) +# ./configure --with-ext=history + +package require history + +set histfile [env HOME]/.jtclsh +history load $histfile +set prefix "" +while {1} { + # Read a complete line (script) + set prompt "${prefix}jim> " + set cmd {} + while {1} { + if {[history getline $prompt line] < 0} { + exit 0 + } + if {$cmd ne ""} { + append cmd \n + } + append cmd $line + if {[info complete $cmd char]} { + break + } + set prompt "$char> " + } + + if {$cmd eq "h"} { + history show + continue + } + + # Don't bother adding single char commands to the history + if {[string length $cmd] > 1} { + history add $cmd + history save $histfile + } + + # Evaluate the script and display the error + try { + set result [eval $cmd] + set prefix "" + } on {error return break continue signal} {result opts} { + set rcname [info returncodes $opts(-code)] + if {$rcname eq "ok" } { + # Note: return set -code to 0 + set rcname return + } elseif {$rcname eq "error"} { + set result [errorInfo $result] + } + set prefix "\[$rcname\] " + } + if {$result ne {}} { + puts $result + } +} |