use std::borrow::Borrow;
use std::collections::HashMap;
use std::collections::HashSet;
use std::rc::Rc;
use crate::classic::chinillaclvm::__type_compatibility__::bi_one;
use crate::compiler::comptypes::{
list_to_cons, Binding, BodyForm, CompileErr, CompileForm, CompilerOpts, HelperForm,
LetFormKind, ModAccum,
};
use crate::compiler::preprocessor::preprocess;
use crate::compiler::rename::rename_children_compileform;
use crate::compiler::sexp::{enlist, SExp};
use crate::compiler::srcloc::Srcloc;
use crate::util::u8_from_number;
fn collect_used_names_sexp(body: Rc<SExp>) -> Vec<Vec<u8>> {
match body.borrow() {
SExp::Atom(_, name) => vec![name.to_vec()],
SExp::Cons(_, head, tail) => {
let mut head_collected = collect_used_names_sexp(head.clone());
let mut tail_collected = collect_used_names_sexp(tail.clone());
head_collected.append(&mut tail_collected);
head_collected
}
_ => vec![],
}
}
fn collect_used_names_binding(body: &Binding) -> Vec<Vec<u8>> {
collect_used_names_bodyform(body.body.borrow())
}
fn collect_used_names_bodyform(body: &BodyForm) -> Vec<Vec<u8>> {
match body {
BodyForm::Let(_, _, bindings, expr) => {
let mut result = Vec::new();
for b in bindings {
let mut new_binding_names = collect_used_names_binding(b);
result.append(&mut new_binding_names);
}
let mut body_names = collect_used_names_bodyform(expr);
result.append(&mut body_names);
result
}
BodyForm::Quoted(_) => vec![],
BodyForm::Value(atom) => match atom.borrow() {
SExp::Atom(_l, v) => vec![v.to_vec()],
SExp::Cons(_l, f, r) => {
let mut first_names = collect_used_names_sexp(f.clone());
let mut rest_names = collect_used_names_sexp(r.clone());
first_names.append(&mut rest_names);
first_names
}
_ => Vec::new(),
},
BodyForm::Call(_l, vs) => {
let mut result = Vec::new();
for a in vs {
let mut argnames = collect_used_names_bodyform(a);
result.append(&mut argnames);
}
result
}
}
}
fn collect_used_names_helperform(body: &HelperForm) -> Vec<Vec<u8>> {
match body {
HelperForm::Defconstant(_, _, value) => collect_used_names_bodyform(value),
HelperForm::Defmacro(_, _, _, body) => collect_used_names_compileform(body),
HelperForm::Defun(_, _, _, _, body) => collect_used_names_bodyform(body),
}
}
fn collect_used_names_compileform(body: &CompileForm) -> Vec<Vec<u8>> {
let mut result = Vec::new();
for h in body.helpers.iter() {
let mut helper_list = collect_used_names_helperform(h.borrow());
result.append(&mut helper_list);
}
let mut ex_list = collect_used_names_bodyform(body.exp.borrow());
result.append(&mut ex_list);
result
}
fn calculate_live_helpers(
opts: Rc<dyn CompilerOpts>,
last_names: &HashSet<Vec<u8>>,
names: &HashSet<Vec<u8>>,
helper_map: &HashMap<Vec<u8>, HelperForm>,
) -> HashSet<Vec<u8>> {
if last_names.len() == names.len() {
names.clone()
} else {
let new_names: HashSet<Vec<u8>> =
names.difference(last_names).map(|x| x.to_vec()).collect();
let mut needed_helpers: HashSet<Vec<u8>> = names.clone();
for name in new_names {
if let Some(new_helper) = helper_map.get(&name) {
let even_newer_names: HashSet<Vec<u8>> = collect_used_names_helperform(new_helper)
.iter()
.map(|x| x.to_vec())
.collect();
needed_helpers = needed_helpers
.union(&even_newer_names)
.into_iter()
.map(|x| x.to_vec())
.collect();
}
}
calculate_live_helpers(opts, names, &needed_helpers, helper_map)
}
}
fn qq_to_expression(body: Rc<SExp>) -> Result<BodyForm, CompileErr> {
let body_copy: &SExp = body.borrow();
match body.borrow() {
SExp::Cons(l, f, r) => {
let op = match f.borrow() {
SExp::Atom(_, o) => o.clone(),
SExp::QuotedString(_, _, s) => s.clone(),
SExp::Integer(_, i) => u8_from_number(i.clone()),
_ => Vec::new(),
};
if op.len() == 1 && (op[0] == b'q' || op[0] == 1) {
return Ok(BodyForm::Quoted(body_copy.clone()));
} else if let Some(list) = r.proper_list() {
if op == b"quote" {
if list.len() != 1 {
return Err(CompileErr(l.clone(), format!("bad form {}", body)));
}
return Ok(BodyForm::Quoted(list[0].clone()));
} else if op == b"unquote" {
if list.len() != 1 {
return Err(CompileErr(l.clone(), format!("bad form {}", body)));
}
return compile_bodyform(Rc::new(list[0].clone()));
}
}
qq_to_expression_list(body.clone())
}
_ => Ok(BodyForm::Quoted(body_copy.clone())),
}
}
fn qq_to_expression_list(body: Rc<SExp>) -> Result<BodyForm, CompileErr> {
match body.borrow() {
SExp::Cons(l, f, r) => {
m! {
f_qq <- qq_to_expression(f.clone());
r_qq <- qq_to_expression_list(r.clone());
Ok(BodyForm::Call(l.clone(), vec!(
Rc::new(BodyForm::Value(
SExp::Atom(l.clone(), "c".as_bytes().to_vec())
)),
Rc::new(f_qq),
Rc::new(r_qq)
)))
}
}
SExp::Nil(l) => Ok(BodyForm::Quoted(SExp::Nil(l.clone()))),
_ => Err(CompileErr(
body.loc(),
format!("Bad list tail in qq {}", body),
)),
}
}
fn args_to_expression_list(body: Rc<SExp>) -> Result<Vec<Rc<BodyForm>>, CompileErr> {
if body.nilp() {
Ok(vec![])
} else {
match body.borrow() {
SExp::Cons(_l, first, rest) => {
let mut result_list = Vec::new();
let f_compiled = compile_bodyform(first.clone())?;
result_list.push(Rc::new(f_compiled));
let mut args = args_to_expression_list(rest.clone())?;
result_list.append(&mut args);
Ok(result_list)
}
_ => Err(CompileErr(
body.loc(),
"Bad arg list tail ".to_string() + &body.to_string(),
)),
}
}
}
fn make_let_bindings(body: Rc<SExp>) -> Result<Vec<Rc<Binding>>, CompileErr> {
let err = Err(CompileErr(
body.loc(),
"Bad binding tail ".to_string() + &body.to_string(),
));
match body.borrow() {
SExp::Nil(_) => Ok(vec![]),
SExp::Cons(_, head, tl) => head
.proper_list()
.map(|x| match &x[..] {
[SExp::Atom(l, name), expr] => {
let compiled_body = compile_bodyform(Rc::new(expr.clone()))?;
let mut result = Vec::new();
let mut rest_bindings = make_let_bindings(tl.clone())?;
result.push(Rc::new(Binding {
loc: l.clone(),
name: name.to_vec(),
body: Rc::new(compiled_body),
}));
result.append(&mut rest_bindings);
Ok(result)
}
_ => err.clone(),
})
.unwrap_or_else(|| err.clone()),
_ => err,
}
}
pub fn compile_bodyform(body: Rc<SExp>) -> Result<BodyForm, CompileErr> {
match body.borrow() {
SExp::Cons(l, op, tail) => {
let application = || {
args_to_expression_list(tail.clone()).and_then(|args| {
compile_bodyform(op.clone()).map(|func| {
let mut result_call = vec![Rc::new(func)];
let mut args_clone = args.to_vec();
result_call.append(&mut args_clone);
BodyForm::Call(l.clone(), result_call)
})
})
};
let finish_err = |site| {
Err(CompileErr(
l.clone(),
format!("{}: bad argument list for form {}", site, body),
))
};
match op.borrow() {
SExp::Atom(l, atom_name) => {
if *atom_name == "q".as_bytes().to_vec()
|| (atom_name.len() == 1 && atom_name[0] == 1)
{
let tail_copy: &SExp = tail.borrow();
return Ok(BodyForm::Quoted(tail_copy.clone()));
}
match tail.proper_list() {
Some(v) => {
if *atom_name == "let".as_bytes().to_vec()
|| *atom_name == "let*".as_bytes().to_vec()
{
if v.len() != 2 {
return finish_err("let");
}
let kind = if *atom_name == "let".as_bytes().to_vec() {
LetFormKind::Parallel
} else {
LetFormKind::Sequential
};
let bindings = v[0].clone();
let body = v[1].clone();
let let_bindings = make_let_bindings(Rc::new(bindings))?;
let compiled_body = compile_bodyform(Rc::new(body))?;
Ok(BodyForm::Let(
l.clone(),
kind,
let_bindings,
Rc::new(compiled_body),
))
} else if *atom_name == "quote".as_bytes().to_vec() {
if v.len() != 1 {
return finish_err("quote");
}
let quote_body = v[0].clone();
Ok(BodyForm::Quoted(quote_body))
} else if *atom_name == "qq".as_bytes().to_vec() {
if v.len() != 1 {
return finish_err("qq");
}
let quote_body = v[0].clone();
qq_to_expression(Rc::new(quote_body))
} else {
application()
}
}
None => finish_err("tail_proper"),
}
}
SExp::Integer(il, i) => compile_bodyform(Rc::new(SExp::Cons(
il.clone(),
Rc::new(SExp::Atom(il.clone(), u8_from_number(i.clone()))),
tail.clone(),
))),
SExp::QuotedString(_, _, _) => {
let body_copy: &SExp = body.borrow();
Ok(BodyForm::Value(body_copy.clone()))
}
SExp::Nil(_l) => {
let body_copy: &SExp = body.borrow();
Ok(BodyForm::Quoted(body_copy.clone()))
}
SExp::Cons(_, _, _) => finish_err("bad cons"),
}
}
_ => {
let body_copy: &SExp = body.borrow();
Ok(BodyForm::Value(body_copy.clone()))
}
}
}
fn compile_defconstant(l: Srcloc, name: Vec<u8>, body: Rc<SExp>) -> Result<HelperForm, CompileErr> {
compile_bodyform(body).map(|bf| HelperForm::Defconstant(l, name.to_vec(), Rc::new(bf)))
}
fn compile_defun(
l: Srcloc,
inline: bool,
name: Vec<u8>,
args: Rc<SExp>,
body: Rc<SExp>,
) -> Result<HelperForm, CompileErr> {
let mut take_form = body.clone();
if let SExp::Cons(_, f, _r) = body.borrow() {
take_form = f.clone();
}
compile_bodyform(take_form)
.map(|bf| HelperForm::Defun(l, name, inline, args.clone(), Rc::new(bf)))
}
fn compile_defmacro(
opts: Rc<dyn CompilerOpts>,
l: Srcloc,
name: Vec<u8>,
args: Rc<SExp>,
body: Rc<SExp>,
) -> Result<HelperForm, CompileErr> {
let program = SExp::Cons(
l.clone(),
Rc::new(SExp::Atom(l.clone(), "mod".as_bytes().to_vec())),
Rc::new(SExp::Cons(l.clone(), args.clone(), body)),
);
let new_opts = opts.set_stdenv(false);
frontend(new_opts, vec![Rc::new(program)])
.map(|p| HelperForm::Defmacro(l, name, args.clone(), Rc::new(p)))
}
#[allow(clippy::type_complexity)]
fn match_op_name_4(body: Rc<SExp>, pl: &[SExp]) -> Option<(Vec<u8>, Vec<u8>, Rc<SExp>, Rc<SExp>)> {
let l = body.loc();
if pl.is_empty() {
return None;
}
match &pl[0] {
SExp::Atom(_, op_name) => {
if pl.len() < 3 {
return Some((
op_name.clone(),
Vec::new(),
Rc::new(SExp::Nil(l.clone())),
Rc::new(SExp::Nil(l)),
));
}
match &pl[1] {
SExp::Atom(_, name) => {
let mut tail_list = Vec::new();
for elt in pl.iter().skip(3) {
tail_list.push(Rc::new(elt.clone()));
}
Some((
op_name.clone(),
name.clone(),
Rc::new(pl[2].clone()),
Rc::new(enlist(l, tail_list)),
))
}
_ => Some((
op_name.clone(),
Vec::new(),
Rc::new(SExp::Nil(l.clone())),
Rc::new(SExp::Nil(l)),
)),
}
}
_ => None,
}
}
fn compile_helperform(
opts: Rc<dyn CompilerOpts>,
body: Rc<SExp>,
) -> Result<Option<HelperForm>, CompileErr> {
let l = body.loc();
let plist = body.proper_list();
if let Some((op_name, name, args, body)) =
plist.and_then(|pl| match_op_name_4(body.clone(), &pl))
{
if op_name == b"defconstant" {
return compile_defconstant(l, name.to_vec(), args).map(Some);
} else if op_name == b"defmacro" {
return compile_defmacro(opts, l, name.to_vec(), args, body).map(Some);
} else if op_name == b"defun" {
return compile_defun(l, false, name.to_vec(), args, body).map(Some);
} else if op_name == b"defun-inline" {
return compile_defun(l, true, name.to_vec(), args, body).map(Some);
}
}
Ok(None)
}
fn compile_mod_(
mc: &ModAccum,
opts: Rc<dyn CompilerOpts>,
args: Rc<SExp>,
content: Rc<SExp>,
) -> Result<ModAccum, CompileErr> {
match content.borrow() {
SExp::Nil(l) => Err(CompileErr(
l.clone(),
"no expression at end of mod".to_string(),
)),
SExp::Cons(l, body, tail) => match tail.borrow() {
SExp::Nil(_) => match mc.exp_form {
Some(_) => Err(CompileErr(l.clone(), "too many expressions".to_string())),
_ => Ok(mc.set_final(&CompileForm {
loc: mc.loc.clone(),
args,
helpers: mc.helpers.clone(),
exp: Rc::new(compile_bodyform(body.clone())?),
})),
},
_ => {
let helper = compile_helperform(opts.clone(), body.clone())?;
match helper {
None => Err(CompileErr(
l.clone(),
"only the last form can be an exprssion in mod".to_string(),
)),
Some(form) => match mc.exp_form {
None => compile_mod_(&mc.add_helper(form), opts, args, tail.clone()),
Some(_) => Err(CompileErr(l.clone(), "too many expressions".to_string())),
},
}
}
},
_ => Err(CompileErr(
content.loc(),
format!("inappropriate sexp {}", content),
)),
}
}
fn frontend_start(
opts: Rc<dyn CompilerOpts>,
pre_forms: Vec<Rc<SExp>>,
) -> Result<ModAccum, CompileErr> {
if pre_forms.is_empty() {
Err(CompileErr(
Srcloc::start(&opts.filename()),
"empty source file not allowed".to_string(),
))
} else {
let finish = || {
let loc = pre_forms[0].loc();
frontend_start(
opts.clone(),
vec![Rc::new(SExp::Cons(
loc.clone(),
Rc::new(SExp::Atom(loc.clone(), "mod".as_bytes().to_vec())),
Rc::new(SExp::Cons(
loc.clone(),
Rc::new(SExp::Nil(loc.clone())),
Rc::new(list_to_cons(loc, &pre_forms)),
)),
))],
)
};
let l = pre_forms[0].loc();
pre_forms[0]
.proper_list()
.map(|x| {
if x.len() < 3 {
return finish();
}
if let SExp::Atom(_, mod_atom) = &x[0] {
if pre_forms.len() > 1 {
return Err(CompileErr(
pre_forms[0].loc(),
"one toplevel mod form allowed".to_string(),
));
}
if *mod_atom == "mod".as_bytes().to_vec() {
let args = Rc::new(x[1].clone());
let body_vec = x.iter().skip(2).map(|s| Rc::new(s.clone())).collect();
let body = Rc::new(enlist(pre_forms[0].loc(), body_vec));
let ls = preprocess(opts.clone(), body)?;
return compile_mod_(
&ModAccum::new(l.clone()),
opts.clone(),
args,
Rc::new(list_to_cons(l, &ls)),
);
}
}
finish()
})
.unwrap_or_else(finish)
}
}
pub fn frontend(
opts: Rc<dyn CompilerOpts>,
pre_forms: Vec<Rc<SExp>>,
) -> Result<CompileForm, CompileErr> {
let started = frontend_start(opts.clone(), pre_forms)?;
let compiled: Result<CompileForm, CompileErr> = match started.exp_form {
None => Err(CompileErr(
started.loc,
"mod must end on an expression".to_string(),
)),
Some(v) => {
let compiled_val: &CompileForm = v.borrow();
Ok(compiled_val.clone())
}
};
let our_mod = rename_children_compileform(&compiled?);
let expr_names: HashSet<Vec<u8>> = collect_used_names_bodyform(our_mod.exp.borrow())
.iter()
.map(|x| x.to_vec())
.collect();
let helper_list = our_mod.helpers.iter().map(|h| (h.name(), h));
let mut helper_map = HashMap::new();
for hpair in helper_list {
helper_map.insert(hpair.0.clone(), hpair.1.clone());
}
let helper_names =
calculate_live_helpers(opts.clone(), &HashSet::new(), &expr_names, &helper_map);
let mut live_helpers = Vec::new();
for h in our_mod.helpers {
if helper_names.contains(h.name()) {
live_helpers.push(h);
}
}
Ok(CompileForm {
loc: our_mod.loc.clone(),
args: our_mod.args.clone(),
helpers: live_helpers,
exp: our_mod.exp.clone(),
})
}
fn is_quote_op(sexp: Rc<SExp>) -> bool {
match sexp.borrow() {
SExp::Atom(_, name) => name.len() == 1 && name[0] as char == 'q',
SExp::Integer(_, v) => v == &bi_one(),
_ => false,
}
}
fn from_chinillaclvm_args(args: Rc<SExp>) -> Rc<SExp> {
match args.borrow() {
SExp::Cons(l, arg, rest) => {
let new_arg = from_chinillaclvm(arg.clone());
let new_rest = from_chinillaclvm_args(rest.clone());
Rc::new(SExp::Cons(l.clone(), new_arg, new_rest))
}
_ => {
from_chinillaclvm(args.clone())
}
}
}
pub fn from_chinillaclvm(sexp: Rc<SExp>) -> Rc<SExp> {
match sexp.borrow() {
SExp::Atom(l, _name) => {
from_chinillaclvm(Rc::new(SExp::Integer(l.clone(), sexp.to_bigint().unwrap())))
}
SExp::QuotedString(l, _, _v) => {
from_chinillaclvm(Rc::new(SExp::Integer(l.clone(), sexp.to_bigint().unwrap())))
}
SExp::Integer(l, _n) => {
Rc::new(SExp::Cons(
l.clone(),
Rc::new(SExp::atom_from_string(l.clone(), "@")),
Rc::new(SExp::Cons(
l.clone(),
sexp.clone(),
Rc::new(SExp::Nil(l.clone())),
)),
))
}
SExp::Nil(_l) => {
sexp.clone()
}
SExp::Cons(l, op, args) => {
if is_quote_op(op.clone()) {
Rc::new(SExp::Cons(
l.clone(),
Rc::new(SExp::atom_from_string(l.clone(), "q")),
args.clone(),
))
} else {
let new_args = from_chinillaclvm_args(args.clone());
Rc::new(SExp::Cons(l.clone(), op.clone(), new_args))
}
}
}
}