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# Implements script-based standard commands for Jim Tcl
if {![exists -command ref]} {
# No support for references, so create a poor-man's reference just good enough for lambda
proc ref {args} {{count 0}} {
format %08x [incr count]
}
}
# Creates an anonymous procedure
proc lambda {arglist args} {
tailcall proc [ref {} function lambda.finalizer] $arglist {*}$args
}
proc lambda.finalizer {name val} {
rename $name {}
}
# Like alias, but creates and returns an anonyous procedure
proc curry {args} {
alias [ref {} function lambda.finalizer] {*}$args
}
# Returns the given argument.
# Useful with 'local' as follows:
# proc a {} {...}
# local function a
#
# set x [lambda ...]
# local function $x
#
proc function {value} {
return $value
}
# Returns a live stack trace as a list of proc filename line ...
# with 3 entries for each stack frame (proc),
# (deepest level first)
proc stacktrace {{skip 0}} {
set trace {}
incr skip
foreach level [range $skip [info level]] {
lappend trace {*}[info frame -$level]
}
return $trace
}
# Returns a human-readable version of a stack trace
proc stackdump {stacktrace} {
set lines {}
foreach {l f p} [lreverse $stacktrace] {
set line {}
if {$p ne ""} {
append line "in procedure '$p' "
if {$f ne ""} {
append line "called "
}
}
if {$f ne ""} {
append line "at file \"$f\", line $l"
}
if {$line ne ""} {
lappend lines $line
}
}
join $lines \n
}
# Add the given script to $jim::defer, to be evaluated when the current
# procedure exits
proc defer {script} {
upvar jim::defer v
lappend v $script
}
# Sort of replacement for $::errorInfo
# Usage: errorInfo error ?stacktrace?
proc errorInfo {msg {stacktrace ""}} {
if {$stacktrace eq ""} {
# By default add the stack backtrace and the live stacktrace
set stacktrace [info stacktrace]
# omit the procedure 'errorInfo' from the stack
lappend stacktrace {*}[stacktrace 1]
}
lassign $stacktrace p f l
if {$f ne ""} {
set result "$f:$l: Error: "
}
append result "$msg\n"
append result [stackdump $stacktrace]
# Remove the trailing newline
string trim $result
}
# Needs to be set up by the container app (e.g. jimsh)
# Returns the empty string if unknown
proc {info nameofexecutable} {} {
if {[exists ::jim::exe]} {
return $::jim::exe
}
}
# Script-based implementation of 'dict update'
proc {dict update} {&varName args script} {
set keys {}
foreach {n v} $args {
upvar $v var_$v
if {[dict exists $varName $n]} {
set var_$v [dict get $varName $n]
}
}
catch {uplevel 1 $script} msg opts
if {[info exists varName]} {
foreach {n v} $args {
if {[info exists var_$v]} {
dict set varName $n [set var_$v]
} else {
dict unset varName $n
}
}
}
return {*}$opts $msg
}
proc {dict replace} {dictionary {args {key value}}} {
if {[llength ${key value}] % 2} {
tailcall {dict replace}
}
tailcall dict merge $dictionary ${key value}
}
# Script-based implementation of 'dict lappend'
proc {dict lappend} {varName key {args value}} {
upvar $varName dict
if {[exists dict] && [dict exists $dict $key]} {
set list [dict get $dict $key]
}
lappend list {*}$value
dict set dict $key $list
}
# Script-based implementation of 'dict append'
proc {dict append} {varName key {args value}} {
upvar $varName dict
if {[exists dict] && [dict exists $dict $key]} {
set str [dict get $dict $key]
}
append str {*}$value
dict set dict $key $str
}
# Script-based implementation of 'dict incr'
proc {dict incr} {varName key {increment 1}} {
upvar $varName dict
if {[exists dict] && [dict exists $dict $key]} {
set value [dict get $dict $key]
}
incr value $increment
dict set dict $key $value
}
# Script-based implementation of 'dict remove'
proc {dict remove} {dictionary {args key}} {
foreach k $key {
dict unset dictionary $k
}
return $dictionary
}
# Script-based implementation of 'dict for'
proc {dict for} {vars dictionary script} {
if {[llength $vars] != 2} {
return -code error "must have exactly two variable names"
}
dict size $dictionary
tailcall foreach $vars $dictionary $script
}
|
