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# This file contains objects that are used to track code positions and incrementally
build up generated code, while keeping track of where it came from, and managing
indentation levels.
use "lib/object.nom"
object (Code):
my action [set up]:
%old_bits = %me.bits
%me.bits = []
if (%me.source is text):
%me.source = (Source from text %me.source)
for % in %old_bits:
%me::add %
my action [as text]:
if (%me.__str == (nil)):
set {%buff:[], %indent:0}
for % in %me.bits:
if (% is text):
%spaces = (%::matching "\n([ ]*)[^\n]*$")
if %spaces.1: %indent = (size of %spaces)
..else:
% = "\%"
if (%indent > 0):
% = (%::with "\n" -> "\n\(" "::* %indent)")
%buff::add %
%me.__str = (%buff::joined)
return %me.__str
my action [as lua] (..)
"\(%me.class.name::as lua id)_1_2(\(%me.source::as lua), \(%me.bits::as lua))"
my action [as nomsu] (..)
"(\(%me.class.name) \(%me.source::as nomsu) \(%me.bits::as nomsu))"
my action [size] (size of "\%me")
my action [mark as dirty]:
%me.__str = (nil)
%me._trailing_line_len = (nil)
%me._num_lines = (nil)
my action [add %new_bits]:
unless (%new_bits is a "List"):
%new_bits = [%new_bits]
for % in %new_bits:
if (% == ""): do next %
if ((% isn't text) and (% isn't a (Code))):
% = (%::as lua)
%me.bits::add %
%me::mark as dirty
my action [trailing line length]:
if (%me._trailing_line_len == (nil)):
%me._trailing_line_len = (size of ("\%me"::matching "[^\n]*$"))
return %me._trailing_line_len
my action [number of lines]:
unless %me._num_lines:
%num_lines = 1
for % in %me:
if (% is text):
%num_lines += (size of (%::all matches of "\n"))
..else:
%num_lines += ((%::number of lines) - 1)
%me._num_lines = %num_lines
return %me._num_lines
my action [is multiline, is multi-line] ((%me::number of lines) > 1)
my action [is one line, is single line] ((%me::number of lines) == 1)
my action [add %values joined with %joiner]:
%me::add %values joined with %joiner or %joiner
my action [add %values joined with %joiner or %wrapping_joiner]:
%line_len = 0
%bits = %me.bits
for %i = % in %values:
if (%i > 1):
if (%line_len > 80):
%bits::add %wrapping_joiner
%line_len = 0
..else:
%bits::add %joiner
%bits::add %
%line = ("\%"::matching "\n([^\n]*)$")
if %line:
%line_len = (size of %line)
..else:
%line_len += (size of %)
%me::mark as dirty
my action [prepend %]:
if ((% isn't text) and (% isn't a %me.__type)):
% = (%::as lua)
%me.bits::add % at index 1
%me::mark as dirty
my action [parenthesize]:
%me.bits::add "(" at index 1
%me.bits::add ")"
%me::mark as dirty
object (Lua Code) extends (Code):
my action [add free vars %vars]:
if ((size of %vars) == 0): return
%seen = (%v = (yes) for %v in %me.free_vars)
for %var in %vars:
assume (%var is text)
unless %seen.%var:
%me.free_vars::add %var
%seen.%var = (yes)
%me::mark as dirty
my action [remove free vars %vars]:
if ((size of %vars) == 0): return
%removals = {}
for %var in %vars:
assume (%var is text)
%removals.%var = (yes)
%stack = [%me]
while ((size of %stack) > 0):
%lua = (%stack::pop)
for %i in (size of %lua.free_vars) to 1 by -1:
if %removals.(%lua.%free_vars.%i):
%lua.free_vars::remove index %i
for % in %lua.bits:
if (% is a "Lua Code"):
%stack::add %
%me::mark as dirty
my action [declare locals]:
set {%to_declare:[], %seen:{}}
for %lua in recursive %me:
for %var in %lua.free_vars:
unless %seen.%var:
%seen.%var = (yes)
%to_declare::add %var
for % in %lua.bits:
if (% is a "Lua Code"):
recurse %lua on %
return (%me::declare locals %to_declare)
my action [declare locals %to_declare]:
if ((size of %to_declare) > 0):
%me::remove free vars %to_declare
%me::prepend "local \(%to_declare::joined with ", ");\n"
return %to_declare
my action [as statements] (%me::as statements "" ";")
my action [as statements %prefix] (%me::as statements %prefix ";")
my action [as statements %prefix %suffix]:
unless %me.is_value:
return %me
%statements = (Lua Code %me.source [])
if (%prefix != ""):
%statements::add %prefix
%statements::add %me
if (%suffix != ""):
%statements::add %suffix
return %statements
action [Lua Code from %source {%bits:[]}]:
if (%bits is text): %bits = [%bits]
if (%source is a "Syntax Tree"): %source = %source.source
return (..)
Lua Code {source:%source, bits:%bits, is_value:(no), free_vars:[]}
action [Lua Value from %tree {%bits:[]}]:
if (%bits is text): %bits = [%bits]
if (%source is a "Syntax Tree"): %source = %source.source
return (..)
Lua Code {source:%source, bits:%bits, is_value:(yes), free_vars:[]}
object (Nomsu Code) extends (Code):
action [Nomsu Code from %source {%bits:[]}]:
if (%bits is text): %bits = [%bits]
if (%source is a "Syntax Tree"): %source = %source.source
return (..)
Nomsu Code {source:%source, bits:%bits}
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