use std::path::Path;
use erg_common::color::{GREEN, RESET};
use erg_common::config::{ErgConfig, Input};
use erg_common::error::MultiErrorDisplay;
use erg_common::log;
use erg_common::traits::{Runnable, Stream};
use erg_common::Str;
use erg_type::codeobj::CodeObj;
use erg_parser::ParserRunner;
use crate::codegen::CodeGenerator;
use crate::effectcheck::SideEffectChecker;
use crate::error::{CompileError, CompileErrors, TyCheckErrors};
use crate::lower::ASTLowerer;
use crate::ownercheck::OwnershipChecker;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum StoreLoadKind {
Local,
LocalConst,
Global,
GlobalConst,
Deref,
DerefConst,
Fast,
FastConst,
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct Name {
pub kind: StoreLoadKind,
pub idx: usize,
}
impl Name {
pub const fn new(kind: StoreLoadKind, idx: usize) -> Self {
Self { kind, idx }
}
pub const fn local(idx: usize) -> Self {
Self {
kind: StoreLoadKind::Local,
idx,
}
}
pub const fn global(idx: usize) -> Self {
Self {
kind: StoreLoadKind::Global,
idx,
}
}
pub const fn deref(idx: usize) -> Self {
Self {
kind: StoreLoadKind::Deref,
idx,
}
}
pub const fn fast(idx: usize) -> Self {
Self {
kind: StoreLoadKind::Fast,
idx,
}
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum AccessKind {
Name,
Attr,
Method,
}
impl AccessKind {
pub const fn is_local(&self) -> bool {
matches!(self, Self::Name)
}
pub const fn is_attr(&self) -> bool {
matches!(self, Self::Attr)
}
pub const fn is_method(&self) -> bool {
matches!(self, Self::Method)
}
}
#[derive(Debug)]
pub struct Compiler {
cfg: ErgConfig,
lowerer: ASTLowerer,
code_generator: CodeGenerator,
}
impl Runnable for Compiler {
type Err = CompileError;
type Errs = CompileErrors;
const NAME: &'static str = "Erg compiler";
fn new(cfg: ErgConfig) -> Self {
Self {
code_generator: CodeGenerator::new(cfg.copy()),
lowerer: ASTLowerer::new(),
cfg,
}
}
#[inline]
fn input(&self) -> &Input {
&self.cfg.input
}
#[inline]
fn finish(&mut self) {}
fn clear(&mut self) {
self.code_generator.clear();
}
fn exec(&mut self) -> Result<(), Self::Errs> {
let path = self.input().filename().replace(".er", ".pyc");
let src = self.input().read();
self.compile_and_dump_as_pyc(src, path, "exec")
}
fn eval(&mut self, src: Str) -> Result<String, CompileErrors> {
let codeobj = self.compile(src, "eval")?;
Ok(codeobj.code_info())
}
}
impl Compiler {
fn convert(&self, errs: TyCheckErrors) -> CompileErrors {
errs.into_iter()
.map(|e| CompileError::new(e.core, self.input().clone(), e.caused_by))
.collect::<Vec<_>>()
.into()
}
pub fn compile_and_dump_as_pyc<P: AsRef<Path>>(
&mut self,
src: Str,
path: P,
mode: &str,
) -> Result<(), CompileErrors> {
let code = self.compile(src, mode)?;
code.dump_as_pyc(path, self.cfg.python_ver)
.expect("failed to dump a .pyc file");
Ok(())
}
pub fn compile(&mut self, src: Str, mode: &str) -> Result<CodeObj, CompileErrors> {
log!("{GREEN}[DEBUG] the compiling process has started.{RESET}");
let mut cfg = self.cfg.copy();
cfg.input = Input::Str(src);
let mut parser = ParserRunner::new(cfg);
let ast = parser.parse()?;
let (hir, warns) = self
.lowerer
.lower(ast, mode)
.map_err(|errs| self.convert(errs))?;
if self.cfg.verbose >= 2 {
let warns = self.convert(warns);
warns.fmt_all_stderr();
}
let effect_checker = SideEffectChecker::new();
let hir = effect_checker
.check(hir)
.map_err(|errs| self.convert(errs))?;
let ownership_checker = OwnershipChecker::new();
let hir = ownership_checker
.check(hir)
.map_err(|errs| self.convert(errs))?;
let codeobj = self.code_generator.codegen(hir);
log!("{GREEN}code object:\n{}", codeobj.code_info());
log!(
"[DEBUG] the compiling process has completed, found errors: {}{RESET}",
self.code_generator.errs.len()
);
if self.code_generator.errs.is_empty() {
Ok(codeobj)
} else {
Err(self.code_generator.errs.flush())
}
}
}