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Some cleanup and fixes. Simplifying a lot of code, and extending the

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flexibility of scoping. Redesigned Object system too.
This commit is contained in:
Bruce Hill 2018-06-14 23:25:05 -07:00
parent 49f1eb3d08
commit b12744d831
17 changed files with 163 additions and 190 deletions
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59
core/control_flow.nom
View File

@ -359,51 +359,6 @@ immediately
end --when % = ?
return %code
# Try/except
immediately
compile [..]
try %action and if it succeeds %success or if it barfs %msg %fallback
try %action and if it barfs %msg %fallback or if it succeeds %success
..to
Lua ".."
do
local fell_through = false
local err, erred = nil, false
local ok, ret = xpcall(function()
\(%action as lua statements)
fell_through = true
end, function(\(%msg as lua expr))
local ok, ret = pcall(function()
\(%fallback as lua statements)
end)
if not ok then err, erred = ret, true end
end)
if ok then
\(%success as lua statements)
if not fell_through then
return ret
end
elseif erred then
error(err, 0)
end
end
immediately
parse [..]
try %action and if it succeeds %success or if it barfs %fallback
try %action and if it barfs %fallback or if it succeeds %success
..as: try %action and if it succeeds %success or if it barfs (=lua "") %fallback
immediately
parse [try %action] as
try %action and if it succeeds: do nothing
..or if it barfs: do nothing
parse [try %action and if it barfs %fallback] as
try %action and if it succeeds: do nothing
..or if it barfs %fallback
parse [try %action and if it barfs %msg %fallback] as
try %action and if it succeeds: do nothing
..or if it barfs %msg %fallback
parse [try %action and if it succeeds %success] as
try %action and if it succeeds %success or if it barfs: do nothing
# Do/finally
immediately
@ -433,17 +388,7 @@ immediately
declare locals in %body
return
Lua value ".."
((function()
(function()
\%body
end)())
end)()
# Coroutines:
immediately
compile [values %body, coroutine %body, generator %body] to
Lua value ".."
(function()
\(%body as lua statements)
end)
compile [->] to: Lua "coroutine.yield(true);"
compile [-> %] to: Lua "coroutine.yield(true, \(% as lua expr));"
compile [-> %k = %v] to: Lua "coroutine.yield(\(%k as lua expr), \(%v as lua expr));"

17
core/coroutines.nom Normal file
View File

@ -0,0 +1,17 @@
#
This file defines the code that creates and manipulates coroutines
use "core/metaprogramming.nom"
compile [coroutine %body, generator %body] to
Lua value ".."
(function()
\(%body as lua statements)
end)
compile [->] to: Lua value "coroutine.yield(true)"
compile [-> %] to: Lua value "coroutine.yield(true, \(% as lua expr))"
compile [for % in coroutine %co %body] to
Lua ".."
for junk,\(% as lua expr) in coroutine.wrap(\(%co as lua expr)) do
\(%body as lua statements)
end

46
core/errors.nom
View File

@ -20,3 +20,49 @@ compile [assume %condition or barf %message] to
if not \(%condition as lua expr) then
error(\(%message as lua expr), 0);
end
# Try/except
immediately
compile [..]
try %action and if it succeeds %success or if it barfs %msg %fallback
try %action and if it barfs %msg %fallback or if it succeeds %success
..to
Lua ".."
do
local fell_through = false
local err, erred = nil, false
local ok, ret = xpcall(function()
\(%action as lua statements)
fell_through = true
end, function(\(%msg as lua expr))
local ok, ret = pcall(function()
\(%fallback as lua statements)
end)
if not ok then err, erred = ret, true end
end)
if ok then
\(%success as lua statements)
if not fell_through then
return ret
end
elseif erred then
error(err, 0)
end
end
immediately
parse [..]
try %action and if it succeeds %success or if it barfs %fallback
try %action and if it barfs %fallback or if it succeeds %success
..as: try %action and if it succeeds %success or if it barfs (=lua "") %fallback
immediately
parse [try %action] as
try %action and if it succeeds: do nothing
..or if it barfs: do nothing
parse [try %action and if it barfs %fallback] as
try %action and if it succeeds: do nothing
..or if it barfs %fallback
parse [try %action and if it barfs %msg %fallback] as
try %action and if it succeeds: do nothing
..or if it barfs %msg %fallback
parse [try %action and if it succeeds %success] as
try %action and if it succeeds %success or if it barfs: do nothing

8
core/metaprogramming.nom
View File

@ -117,8 +117,12 @@ immediately
action [%tree as lua return]
=lua "nomsu:tree_to_lua(\%tree):as_statements('return ')"
action [%var as lua identifier]
=lua "type(\%var) == 'string' and string.as_lua_id(\%var) or nomsu:tree_to_lua(\%var)"
action [%var as lua identifier, %var as lua id]
lua> ".."
if type(\%var) == 'string' then return string.as_lua_id(\%var)
elseif \%var.type == 'Var' then return string.as_lua_id(\%var[1])
elseif \%var.type == 'Action' then return "A"..string.as_lua_id(\%var.stub)
end
immediately
compile [%tree with %t -> %replacement] to

2
core/operators.nom
View File

@ -40,7 +40,7 @@ immediately
immediately
# Simultaneous mutli-assignments like: x,y,z = 1,x,3;
compile [<- %assignments] to
compile [<- %assignments, assign %assignments] to
assume (%assignments.type is "Dict") or barf ".."
Expected a Dict for the assignments part of '<- %' statement, not \%assignments
lua> ".."

66
core/scopes.nom
View File

@ -1,54 +1,30 @@
use "core/metaprogramming.nom"
use "core/text.nom"
use "core/operators.nom"
use "core/collections.nom"
use "core/control_flow.nom"
compile [using %definitions %body, using %definitions do %body] to
%setup_lua <-
Lua ".."
local fell_through = false
local ok, ret = pcall(function()
\(%definitions as lua statements)
fell_through = true
end)
%body_lua <-
Lua ".."
local fell_through = false
local ok, ret = pcall(function()
\(%body as lua statements)
fell_through = true
end)
remove free vars (declare locals in %setup_lua) from %body_lua
%lua <-
compile [with local %locals %body, with local %locals do %body] to
%body_lua <- (%body as lua statements)
when %locals.type = ?
* "Dict"
%body_lua <-
Lua ".."
\(=lua "A_assign_1(\%locals, \%locals)")
\%body_lua
declare locals
(%.1 as lua id) for % in %locals
.. in %body_lua
* "List"
declare locals
(% as lua id) for % in %locals
.. in %body_lua
* "Var"
* "Action"
declare locals [%locals as lua id] in %body_lua
* else
barf "Unexpected local: \(%locals as nomsu)"
return
Lua ".."
do
local old_actions, old_compile_actions, old_arg_orders = ACTIONS, COMPILE_ACTIONS, ARG_ORDERS
ACTIONS = setmetatable({}, {__index=old_actions})
COMPILE_ACTIONS = setmetatable({}, {__index=old_compile_actions})
ARG_ORDERS = setmetatable({}, {__index=old_arg_orders})
\%setup_lua
if not ok then
ACTIONS, COMPILE_ACTIONS, ARG_ORDERS = old_actions, old_compile_actions, old_arg_orders
error(ret, 0)
end
if not fell_through then
ACTIONS, COMPILE_ACTIONS, ARG_ORDERS = old_actions, old_compile_actions, old_arg_orders
return ret
end
getmetatable(ACTIONS).__newindex = old_actions
getmetatable(COMPILE_ACTIONS).__newindex = old_compile_actions
getmetatable(ARG_ORDERS).__newindex = old_arg_orders
\%body_lua
ACTIONS, COMPILE_ACTIONS, ARG_ORDERS = old_actions, old_compile_actions, old_arg_orders
if not ok then
error(ret, 0)
end
if not fell_through then
return ret
end
end
declare locals in %lua
return %lua
parse [using %] as: using % (do nothing)

85
lib/object.nom
View File

@ -1,7 +1,5 @@
use "core"
# TODO: make codegen less verbose
lua> "CLASSES = {}"
immediately
@ -11,50 +9,41 @@ action [new %classname %inst]
immediately
parse [new %classname] as: new %classname {}
compile [as %instance %body] to
Lua ".."
do
local self = \(%instance as lua expr)
local old_self = self.class:set_self(self)
old_actions, ACTIONS = ACTIONS, self.class.ACTIONS
old_compile_actions, COMPILE_ACTIONS = COMPILE_ACTIONS, self.class.COMPILE_ACTIONS
old_arg_orders, ARG_ORDERS = ARG_ORDERS, self.class.ARG_ORDERS
local fell_through = false
local ok, ret = pcall(function()
\(%body as lua statements)
fell_through = true
end)
self.class:set_self(old_self)
ACTIONS = old_actions
COMPILE_ACTIONS = old_compile_actions
ARG_ORDERS = old_arg_orders
if not ok then error(ret) end
if not fell_through then return ret end
end
immediately
compile [call method %method] to: Lua value "self:\(%method as lua expr)"
parse [object %classname %class_body] as
using
%cls <- {..}
name:%classname
ACTIONS:=lua "ACTIONS", COMPILE_ACTIONS:=lua "COMPILE_ACTIONS"
ARG_ORDERS:=lua "ARG_ORDERS"
(=lua "CLASSES").%classname <- %cls
lua> ".."
setmetatable(\%cls, {__tostring=function() return \%classname end})
local self = nil
\%cls.set_self = function(_, inst)
local old_self = self
self = inst
return old_self
end
\%cls.__index = \%cls
\%cls.class = \%cls
%class_body
run ".."
action [new \%classname %inst]
say "NEWING"
return: =lua "setmetatable(\\%inst, \\%cls)"
lua> ".."
if ACTIONS["as text"] then
\%cls.__tostring = ACTIONS["as text"]
end
parse [as %instance %body] as
result of
%old_self <- (me)
(me) <- %instance
try
%body
..and if it barfs %msg
(me) <- %old_self
barf %msg
..or if it succeeds
(me) <- %old_self
compile [object %classname %class_body] to
%lua <-
Lua ".."
do
local class = {name=\(%classname as lua expr)}
setmetatable(class, {__tostring=function(cls) return cls.name end})
CLASSES[class.name] = class
class.__index = class
class.class = class
if: %class_body.type != "Block"
%class_body <- [%class_body]
for %statement in %class_body
assume: (%statement.type is "Action") and (%statement.stub is "action % %")
to %lua write "\n class."
to %lua write (%statement as lua)
to %lua write ".."
class.__tostring = class["A"..string.as_lua_id("as text")]
end
return %lua

10
nomsu.lua
View File

@ -1305,6 +1305,16 @@ do
self.environment.LOADED = { }
self.environment.AST = AST
self.environment._ENV = self.environment
setmetatable(self.environment, {
__index = function(self, k)
do
local _self = rawget(self, "self")
if _self then
return _self[k]
end
end
end
})
return self:initialize_core()
end,
__base = _base_0,

4
nomsu.moon
View File

@ -299,6 +299,10 @@ class NomsuCompiler
@environment.LOADED = {}
@environment.AST = AST
@environment._ENV = @environment
setmetatable @environment,
__index: (k)=>
if _self = rawget(@, "self")
return _self[k]
@initialize_core!
parse: (nomsu_code)=>

2
tests/collections.nom
View File

@ -1,5 +1,5 @@
#..
Tests for the stuff defined in lib/control_flow.nom
Tests for the stuff defined in core/control_flow.nom
use "core"

14
tests/control_flow.nom
View File

@ -1,5 +1,5 @@
#
Tests for the stuff defined in lib/control_flow.nom
Tests for the stuff defined in core/control_flow.nom
use "core"
@ -193,15 +193,3 @@ assume
return %n
..= 6
#
%nums <- []
for % in
values
-> 4
-> 5
-> 6
..
add % to %nums
assume (%nums = [4,5,6]) or barf "Coroutine iteration failed"

2
tests/math.nom
View File

@ -1,5 +1,5 @@
#..
Tests for the stuff defined in lib/control_flow.nom
Tests for the stuff defined in core/control_flow.nom
use "core"

2
tests/metaprogramming.nom
View File

@ -1,5 +1,5 @@
#..
Tests for the stuff defined in lib/metaprogramming.nom
Tests for the stuff defined in core/metaprogramming.nom
use "core"

3
tests/object.nom
View File

@ -1,3 +1,6 @@
#
Tests for the object model defined in lib/object.nom
use "core"
use "lib/object.nom"

2
tests/operators.nom
View File

@ -1,5 +1,5 @@
#..
Tests for the stuff defined in lib/operators.nom
Tests for the stuff defined in core/operators.nom
use "core"

29
tests/scopes.nom
View File

@ -1,25 +1,16 @@
use "core"
using
%x <- 99
..do
assume: %x = 99
%x <- "outer"
with local %x
%x <- "inner"
assume: %x = "inner"
assume: %x = "outer"
using
action [foo]
return 99
..do
assume: (foo) = 99
action [foo] "outer foo"
with local (foo)
action [foo] "inner foo"
assume: (foo) = "inner foo"
assume: (foo) = "outer foo"
action [baz]
return "outer"
#
do
local action [baz]
return "inner"
assume: (baz) = "inner"
assume: (baz) = "outer"
say "Scopes test passed."

2
tests/text.nom
View File

@ -1,5 +1,5 @@
#..
Tests for the stuff defined in lib/text.nom
Tests for the stuff defined in core/text.nom
use "core"