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#!/usr/bin/env nomsu -V6.15.13.8
#
A library for simple object oriented programming.
use "core/metaprogramming"
use "core/operators"
use "core/control_flow"
use "core/collections"
use "core/errors"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
test:
(an Empty) is (a thing) with []
(a Buffer) is (a thing) with [$bits]:
$self.is_a_buffer = (yes)
($self, set up) means:
$bits or= []
($self, as text) means ($bits, joined)
[($self, add $bit), ($self, append $bit)] all mean: $bits, add $bit
assume $(a Buffer).is_a_buffer
$b = (a Buffer)
assume (type of $b) == "a Buffer"
assume ($b is "a Buffer")
assume $b.is_a_buffer
assume "\$b" == ""
assume ($b, as text) == ""
$b = (a Buffer {.bits = ["x"]})
$b,
add "y"
append "z"
assume "\$b" == "xyz"
assume $b == (a Buffer {.bits = ["x", "y", "z"]})
assume $b != (a Buffer {.bits = []})
(a Comma Buffer) is (a Buffer) with [$bits]:
($self, as text) means ($bits, joined with ",")
($self, number of commas) means ((#$bits) - 1)
$csv = (a Comma Buffer)
assume $csv.is_a_buffer
assume ($csv is "a Comma Buffer")
assume ($csv is "a Buffer")
assume "\$csv" == ""
$csv, add "x"
$csv, add "y"
assume "\$csv" == "x,y"
assume ($csv, number of commas) == 1
(a Vec) is (a thing) with [$x, $y]:
($self, + $other) means (Vec ($x + $other.x) ($y + $other.y))
($self, length) means (sqrt ($x * $x + $y * $y))
(Vec $x $y) means (a Vec {.x = $x, .y = $y})
assume ((Vec 1 2) + (Vec 10 10)) == (Vec 11 12)
assume (((Vec 1 2) + (Vec 10 10)) != (Vec 0 0))
assume (Vec 3 4, length) == 5
$METAMETHOD_MAP = {
."as text" = "__tostring", ."clean up" = "__gc", ."+" = "__add", ."-" = "__sub"
."*" = "__mul", ."/" = "__div", .negative = "__unm", ."//" = "__idiv"
.mod = "__mod", ."^" = "__pow", ."&" = "__band", ."|" = "__bor", ."~" = "__bxor"
."~" = "__bnot", ."<<" = "__bshl", .">>" = "__bshr", ."==" = "__eq"
."<" = "__lt", ."<=" = "__le", ."set 1 =" = "__newindex"
.size = "__len", .iterate = "__ipairs", ."iterate all" = "__pairs"
}
$($ as text like a dict) = ({}'s metatable).__tostring
external:
($parent class named $classname $(initialize $)) means:
$class = {.__type = $classname}
$class.__index = $class
$class.class = $class
$class.__tostring = ($ -> "\($.__type) \($ as text like a dict)")
$class.__eq = ({}'s metatable).__eq
$class.__len = ({}'s metatable).__len
set $class's metatable to {
.__index = $parent, .__tostring = ($class -> $class.__type)
.__call =
for ($class with $initial_values):
$initial_values or= {}
set $initial_values's metatable to $class
if $initial_values.set_up:
$initial_values, set up
return $initial_values
}
if $(initialize $):
initialize $class
for $stub = $metamethod in $METAMETHOD_MAP:
if $class.($stub, as lua id):
$class.$metamethod = $class.($stub, as lua id)
return $class
$(a thing) = ((nil) class named "thing")
($classname is $parent with $vars $class_body) compiles to:
unless ($vars.type == "List"):
at $vars fail ("
Compile error: This is not a list of variables.
")
$class_id = ($classname.stub, as lua id)
$class_body and=
$class_body, with
$t ->:
for $v in $vars:
if ($t == $v):
return
"IndexChain" tree with ("Var" tree with "self")
"Index" tree with ("Text" tree with $v.1)
if ($parent.type == "Action"):
$parent = ("Var" tree with $parent)
$lua =
Lua ("
\$class_id = _1_class_named(\($parent as lua id), \(quote $classname.stub)\(
(
Lua ("
, function(\$class_id)
local self = \$class_id
\($class_body as lua)
end
")
) if $class_body else ""
))
")
$lua, add free vars [$class_id]
return $lua
|
