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feat: code checking in lowering

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Edgar 2024-02-24 11:43:49 +01:00
parent 3992a57069
commit 14bd8af270
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GPG key ID: 70ADAE8F35904387
10 changed files with 367 additions and 95 deletions
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3
Cargo.lock generated
View file

@ -315,6 +315,8 @@ version = "0.0.1-alpha.8"
dependencies = [
"ariadne",
"edlang_ast",
"edlang_lowering",
"edlang_session",
"tracing",
]
@ -365,6 +367,7 @@ version = "0.0.1-alpha.8"
dependencies = [
"edlang_ast",
"edlang_ir",
"thiserror",
"tracing",
]

2
lib/edlang_check/Cargo.toml
View file

@ -15,4 +15,6 @@ repository = "https://github.com/edg-l/edlang"
[dependencies]
ariadne = { version = "0.4.0", features = ["auto-color"] }
edlang_ast = { version = "0.0.1-alpha.8", path = "../edlang_ast" }
edlang_lowering = { version = "0.0.1-alpha.8", path = "../edlang_lowering" }
edlang_session = { version = "0.0.1-alpha.8", path = "../edlang_session" }
tracing = { workspace = true }

108
lib/edlang_check/src/lib.rs
View file

@ -1 +1,109 @@
use std::ops::Range;
use ariadne::{ColorGenerator, Label, Report, ReportKind};
use edlang_lowering::errors::LoweringError;
use edlang_session::Session;
/// Creates a report from a lowering error.
pub fn lowering_error_to_report(
error: LoweringError,
session: &Session,
) -> Report<(String, Range<usize>)> {
let path = session.file_path.display().to_string();
let mut colors = ColorGenerator::new();
colors.next();
match error {
LoweringError::ModuleNotFound { span, module } => {
let offset = span.lo;
Report::build(ReportKind::Error, path.clone(), offset)
.with_code("E1")
.with_label(
Label::new((path, span.into()))
.with_message(format!("Module {module:?} not found."))
.with_color(colors.next()),
)
.with_message("Unresolved import.")
.finish()
}
LoweringError::FunctionNotFound { span, function } => {
Report::build(ReportKind::Error, path.clone(), span.lo)
.with_code("EFNNOTFOUND")
.with_label(
Label::new((path, span.into()))
.with_message(format!("Function {function:?} not found."))
.with_color(colors.next()),
)
.finish()
},
LoweringError::ImportNotFound { import_span, module_span, symbol } => {
let offset = symbol.span.lo;
Report::build(ReportKind::Error, path.clone(), offset)
.with_code("E2")
.with_label(
Label::new((path.clone(), module_span.into()))
.with_message("In module this module."),
)
.with_label(
Label::new((path.clone(), import_span.into()))
.with_message("In this import statement"),
)
.with_label(
Label::new((path, symbol.span.into()))
.with_message(format!("Failed to find symbol {:?}", symbol.name))
.with_color(colors.next()),
)
.with_message("Unresolved import.")
.finish()
},
LoweringError::BorrowNotMutable { span, name, type_span } => {
let mut labels = vec![
Label::new((path.clone(), span.into()))
.with_message(format!("Can't mutate {name:?} because it's behind a immutable borrow"))
.with_color(colors.next())
];
if let Some(type_span) = type_span {
labels.push(Label::new((path.clone(), type_span.into()))
.with_message(format!("Variable {name:?} has this type"))
.with_color(colors.next()));
}
Report::build(ReportKind::Error, path.clone(), span.lo)
.with_code("EREFMUT")
.with_labels(labels)
.finish()
},
LoweringError::UnrecognizedType { span, name } => {
Report::build(ReportKind::Error, path.clone(), span.lo)
.with_code("E3")
.with_label(
Label::new((path, span.into()))
.with_message(format!("Failed to find type {:?}", name))
.with_color(colors.next()),
)
.with_message(format!("Unresolved type {:?}.", name))
.finish()
},
LoweringError::IdNotFound { span, id } => {
Report::build(ReportKind::Error, path.clone(), span.lo)
.with_code("E_ID")
.with_label(
Label::new((path, span.into()))
.with_message("Failed to definition id")
.with_color(colors.next()),
)
.with_message(format!("Failed to find definition id {id:?}, this is most likely a compiler bug or a unimplemented lowering"))
.finish()
},
LoweringError::NotYetImplemented { span, message } => {
Report::build(ReportKind::Error, path.clone(), span.lo)
.with_code("TODO")
.with_label(
Label::new((path, span.into()))
.with_message(message)
.with_color(colors.next()),
)
.finish()
},
}
}

10
lib/edlang_driver/src/lib.rs
View file

@ -125,7 +125,15 @@ pub fn main() -> Result<(), Box<dyn Error>> {
return Ok(());
}
let program_ir = lower_modules(&[module.clone()]);
let program_ir = match lower_modules(&[module.clone()]) {
Ok(ir) => ir,
Err(error) => {
let report = edlang_check::lowering_error_to_report(error, &session);
let path = session.file_path.display().to_string();
report.eprint((path, session.source.clone()))?;
std::process::exit(1);
}
};
if args.ir {
println!("{:#?}", program_ir);

2
lib/edlang_driver/tests/common.rs
View file

@ -63,7 +63,7 @@ pub fn compile_program(
output_asm: false,
};
let program_ir = lower_modules(&[module]);
let program_ir = lower_modules(&[module])?;
let object_path = edlang_codegen_llvm::compile(&session, &program_ir)?;

1
lib/edlang_lowering/Cargo.toml
View file

@ -16,3 +16,4 @@ repository = "https://github.com/edg-l/edlang"
edlang_ast = { version = "0.0.1-alpha.8", path = "../edlang_ast" }
edlang_ir = { version = "0.0.1-alpha.8", path = "../edlang_ir" }
tracing.workspace = true
thiserror = "1.0.57"

30
lib/edlang_lowering/src/errors.rs Normal file
View file

@ -0,0 +1,30 @@
use edlang_ast::{Ident, Span};
use thiserror::Error;
use crate::DefId;
#[derive(Debug, Error, Clone)]
pub enum LoweringError {
#[error("module {module:?} not found")]
ModuleNotFound { span: Span, module: String },
#[error("function {function:?} not found")]
FunctionNotFound { span: Span, function: String },
#[error("symbol {:?} not found", symbol.name)]
ImportNotFound {
module_span: Span,
import_span: Span,
symbol: Ident,
},
#[error("trying to mutate a non-mutable reference")]
BorrowNotMutable {
span: Span,
type_span: Option<Span>,
name: String,
},
#[error("unrecognized type {name}")]
UnrecognizedType { span: Span, name: String },
#[error("id not found")]
IdNotFound { span: Span, id: DefId },
#[error("feature not yet implemented: {message}")]
NotYetImplemented { span: Span, message: &'static str },
}

192
lib/edlang_lowering/src/lib.rs
View file

@ -4,6 +4,7 @@ use ast::{BinaryOp, ModuleStatement, Span, WhileStmt};
use common::{BodyBuilder, BuildCtx};
use edlang_ast as ast;
use edlang_ir as ir;
use errors::LoweringError;
use ir::{
AdtBody, AdtVariant, BasicBlock, Body, DefId, Local, LocalKind, Operand, Place, PlaceElem,
ProgramBody, RValue, Statement, StatementKind, SwitchTarget, Terminator, TypeInfo, TypeKind,
@ -11,19 +12,20 @@ use ir::{
use tracing::trace;
mod common;
pub mod errors;
mod prepass;
pub fn lower_modules(modules: &[ast::Module]) -> ProgramBody {
pub fn lower_modules(modules: &[ast::Module]) -> Result<ProgramBody, LoweringError> {
let mut ctx = BuildCtx::default();
// resolve symbols
for module in modules {
ctx = prepass::prepass_module(ctx, module);
ctx = prepass::prepass_module(ctx, module)?;
}
// resolve imports
for module in modules {
ctx = prepass::prepass_imports(ctx, module);
ctx = prepass::prepass_imports(ctx, module)?;
}
for mod_def in modules {
@ -33,19 +35,23 @@ pub fn lower_modules(modules: &[ast::Module]) -> ProgramBody {
.get(&mod_def.name.name)
.expect("module should exist");
ctx = lower_module(ctx, mod_def, id);
ctx = lower_module(ctx, mod_def, id)?;
}
ctx.body
Ok(ctx.body)
}
fn lower_module(mut ctx: BuildCtx, module: &ast::Module, id: DefId) -> BuildCtx {
fn lower_module(
mut ctx: BuildCtx,
module: &ast::Module,
id: DefId,
) -> Result<BuildCtx, LoweringError> {
// lower first structs, constants, types
for content in &module.contents {
match content {
ModuleStatement::Constant(_) => todo!(),
ModuleStatement::Struct(info) => {
ctx = lower_struct(ctx, info, id);
ctx = lower_struct(ctx, info, id)?;
}
// ModuleStatement::Type(_) => todo!(),
_ => {}
@ -63,12 +69,12 @@ fn lower_module(mut ctx: BuildCtx, module: &ast::Module, id: DefId) -> BuildCtx
let ret_type;
for arg in &fn_def.params {
let ty = lower_type(&ctx, &arg.arg_type, id);
let ty = lower_type(&ctx, &arg.arg_type, id)?;
args.push(ty);
}
if let Some(ty) = &fn_def.return_type {
ret_type = lower_type(&ctx, ty, id);
ret_type = lower_type(&ctx, ty, id)?;
} else {
ret_type = TypeInfo {
span: None,
@ -83,7 +89,7 @@ fn lower_module(mut ctx: BuildCtx, module: &ast::Module, id: DefId) -> BuildCtx
for content in &module.contents {
match content {
ModuleStatement::Function(fn_def) => {
ctx = lower_function(ctx, fn_def, id);
ctx = lower_function(ctx, fn_def, id)?;
}
// ModuleStatement::Type(_) => todo!(),
ModuleStatement::Module(_mod_def) => {}
@ -91,10 +97,14 @@ fn lower_module(mut ctx: BuildCtx, module: &ast::Module, id: DefId) -> BuildCtx
}
}
ctx
Ok(ctx)
}
fn lower_struct(mut ctx: BuildCtx, info: &ast::Struct, module_id: DefId) -> BuildCtx {
fn lower_struct(
mut ctx: BuildCtx,
info: &ast::Struct,
module_id: DefId,
) -> Result<BuildCtx, LoweringError> {
let mut body = AdtBody {
def_id: {
let body = ctx.body.modules.get(&module_id).unwrap();
@ -111,7 +121,7 @@ fn lower_struct(mut ctx: BuildCtx, info: &ast::Struct, module_id: DefId) -> Buil
let variant = AdtVariant {
def_id: ctx.gen.next_defid(),
name: field.name.name.clone(),
ty: lower_type(&ctx, &field.r#type, module_id),
ty: lower_type(&ctx, &field.r#type, module_id)?,
};
body.variants.push(variant);
body.name_to_idx
@ -119,10 +129,14 @@ fn lower_struct(mut ctx: BuildCtx, info: &ast::Struct, module_id: DefId) -> Buil
}
ctx.body.structs.insert(body.def_id, body);
ctx
Ok(ctx)
}
fn lower_function(ctx: BuildCtx, func: &ast::Function, module_id: DefId) -> BuildCtx {
fn lower_function(
ctx: BuildCtx,
func: &ast::Function,
module_id: DefId,
) -> Result<BuildCtx, LoweringError> {
let mut builder = BodyBuilder {
body: Body {
blocks: Default::default(),
@ -180,7 +194,7 @@ fn lower_function(ctx: BuildCtx, func: &ast::Function, module_id: DefId) -> Buil
// Get all user defined locals
for stmt in &func.body.body {
if let ast::Statement::Let(info) = stmt {
let ty = lower_type(&builder.ctx, &info.r#type, builder.local_module);
let ty = lower_type(&builder.ctx, &info.r#type, builder.local_module)?;
builder
.name_to_local
.insert(info.name.name.clone(), builder.body.locals.len());
@ -195,7 +209,7 @@ fn lower_function(ctx: BuildCtx, func: &ast::Function, module_id: DefId) -> Buil
}
for stmt in &func.body.body {
lower_statement(&mut builder, stmt, &ret_ty.kind);
lower_statement(&mut builder, stmt, &ret_ty.kind)?;
}
if !builder.statements.is_empty() {
@ -210,10 +224,14 @@ fn lower_function(ctx: BuildCtx, func: &ast::Function, module_id: DefId) -> Buil
let (mut ctx, body) = (builder.ctx, builder.body);
ctx.unresolved_function_signatures.remove(&body.def_id);
ctx.body.functions.insert(body.def_id, body);
ctx
Ok(ctx)
}
fn lower_statement(builder: &mut BodyBuilder, info: &ast::Statement, ret_type: &TypeKind) {
fn lower_statement(
builder: &mut BodyBuilder,
info: &ast::Statement,
ret_type: &TypeKind,
) -> Result<(), LoweringError> {
match info {
ast::Statement::Let(info) => lower_let(builder, info),
ast::Statement::Assign(info) => lower_assign(builder, info),
@ -222,12 +240,17 @@ fn lower_statement(builder: &mut BodyBuilder, info: &ast::Statement, ret_type: &
ast::Statement::If(info) => lower_if_stmt(builder, info, ret_type),
ast::Statement::Return(info) => lower_return(builder, info, ret_type),
ast::Statement::FnCall(info) => {
lower_fn_call(builder, info);
lower_fn_call(builder, info)?;
Ok(())
}
}
}
fn lower_while(builder: &mut BodyBuilder, info: &WhileStmt, ret_type: &TypeKind) {
fn lower_while(
builder: &mut BodyBuilder,
info: &WhileStmt,
ret_type: &TypeKind,
) -> Result<(), LoweringError> {
let statements = std::mem::take(&mut builder.statements);
builder.body.blocks.push(BasicBlock {
statements: statements.into(),
@ -235,7 +258,8 @@ fn lower_while(builder: &mut BodyBuilder, info: &WhileStmt, ret_type: &TypeKind)
terminator_span: Some(info.block.span),
});
let (discriminator, discriminator_type, disc_span) = lower_expr(builder, &info.condition, None);
let (discriminator, discriminator_type, disc_span) =
lower_expr(builder, &info.condition, None)?;
let local = builder.add_temp_local(TypeKind::Bool);
let place = Place {
@ -262,7 +286,7 @@ fn lower_while(builder: &mut BodyBuilder, info: &WhileStmt, ret_type: &TypeKind)
let first_then_block_idx = builder.body.blocks.len();
for stmt in &info.block.body {
lower_statement(builder, stmt, ret_type);
lower_statement(builder, stmt, ret_type)?;
}
// keet idx to change terminator if there is no return
@ -299,11 +323,18 @@ fn lower_while(builder: &mut BodyBuilder, info: &WhileStmt, ret_type: &TypeKind)
if let Some(last_then_block_idx) = last_then_block_idx {
builder.body.blocks[last_then_block_idx].terminator = Terminator::Target(check_block_idx);
}
Ok(())
}
fn lower_if_stmt(builder: &mut BodyBuilder, info: &ast::IfStmt, ret_type: &TypeKind) {
let cond_ty = find_expr_type(builder, &info.condition).expect("coouldnt find cond type");
let (condition, condition_ty, cond_span) = lower_expr(builder, &info.condition, Some(&cond_ty));
fn lower_if_stmt(
builder: &mut BodyBuilder,
info: &ast::IfStmt,
ret_type: &TypeKind,
) -> Result<(), LoweringError> {
let cond_ty = find_expr_type(builder, &info.condition).expect("couldnt find cond type");
let (condition, condition_ty, cond_span) =
lower_expr(builder, &info.condition, Some(&cond_ty))?;
let local = builder.add_temp_local(TypeKind::Bool);
let place = Place {
@ -330,7 +361,7 @@ fn lower_if_stmt(builder: &mut BodyBuilder, info: &ast::IfStmt, ret_type: &TypeK
let first_then_block_idx = builder.body.blocks.len();
for stmt in &info.then_block.body {
lower_statement(builder, stmt, ret_type);
lower_statement(builder, stmt, ret_type)?;
}
// keet idx to change terminator
@ -354,7 +385,7 @@ fn lower_if_stmt(builder: &mut BodyBuilder, info: &ast::IfStmt, ret_type: &TypeK
if let Some(contents) = &info.else_block {
for stmt in &contents.body {
lower_statement(builder, stmt, ret_type);
lower_statement(builder, stmt, ret_type)?;
}
}
@ -396,11 +427,13 @@ fn lower_if_stmt(builder: &mut BodyBuilder, info: &ast::IfStmt, ret_type: &TypeK
if let Some(idx) = last_else_block_idx {
builder.body.blocks[idx].terminator = Terminator::Target(next_block_idx);
}
Ok(())
}
fn lower_let(builder: &mut BodyBuilder, info: &ast::LetStmt) {
let ty = lower_type(&builder.ctx, &info.r#type, builder.local_module);
let (rvalue, _ty, _span) = lower_expr(builder, &info.value, Some(&ty.kind));
fn lower_let(builder: &mut BodyBuilder, info: &ast::LetStmt) -> Result<(), LoweringError> {
let ty = lower_type(&builder.ctx, &info.r#type, builder.local_module)?;
let (rvalue, _ty, _span) = lower_expr(builder, &info.value, Some(&ty.kind))?;
let local_idx = builder.name_to_local.get(&info.name.name).copied().unwrap();
builder.statements.push(Statement {
span: Some(info.name.span),
@ -416,10 +449,12 @@ fn lower_let(builder: &mut BodyBuilder, info: &ast::LetStmt) {
rvalue,
),
});
Ok(())
}
fn lower_assign(builder: &mut BodyBuilder, info: &ast::AssignStmt) {
let (mut place, mut ty, _span) = lower_path(builder, &info.name);
fn lower_assign(builder: &mut BodyBuilder, info: &ast::AssignStmt) -> Result<(), LoweringError> {
let (mut place, mut ty, _span) = lower_path(builder, &info.name)?;
for _ in 0..info.deref_times {
match &ty {
@ -440,12 +475,14 @@ fn lower_assign(builder: &mut BodyBuilder, info: &ast::AssignStmt) {
place.projection.push(PlaceElem::Deref);
}
let (rvalue, _ty, _span) = lower_expr(builder, &info.value, Some(&ty));
let (rvalue, _ty, _span) = lower_expr(builder, &info.value, Some(&ty))?;
builder.statements.push(Statement {
span: Some(info.name.first.span),
kind: StatementKind::Assign(place, rvalue),
});
Ok(())
}
fn find_expr_type(builder: &mut BodyBuilder, info: &ast::Expression) -> Option<TypeKind> {
@ -510,22 +547,22 @@ fn lower_expr(
builder: &mut BodyBuilder,
info: &ast::Expression,
type_hint: Option<&TypeKind>,
) -> (ir::RValue, TypeKind, Span) {
match info {
) -> Result<(ir::RValue, TypeKind, Span), LoweringError> {
Ok(match info {
ast::Expression::Value(info) => {
let (value, ty, span) = lower_value(builder, info, type_hint);
let (value, ty, span) = lower_value(builder, info, type_hint)?;
(ir::RValue::Use(value, span), ty, span)
}
ast::Expression::FnCall(info) => {
let (value, ty, span) = lower_fn_call(builder, info);
let (value, ty, span) = lower_fn_call(builder, info)?;
(ir::RValue::Use(value, span), ty, span)
}
ast::Expression::Unary(_, _) => todo!(),
ast::Expression::Binary(lhs, op, rhs) => {
lower_binary_expr(builder, lhs, op, rhs, type_hint)
lower_binary_expr(builder, lhs, op, rhs, type_hint)?
}
ast::Expression::Deref(inner) => {
let (value, ty, span) = lower_expr(builder, inner, type_hint);
let (value, ty, span) = lower_expr(builder, inner, type_hint)?;
// check if its a use directly, to avoid a temporary.
let mut value = match value {
@ -549,7 +586,7 @@ fn lower_expr(
},
None => None,
};
let (mut value, ty, span) = lower_expr(builder, inner, type_hint);
let (mut value, ty, span) = lower_expr(builder, inner, type_hint)?;
// check if its a use directly, to avoid a temporary.
value = match value {
@ -617,7 +654,7 @@ fn lower_expr(
let variant = &struct_body.variants[idx].ty.kind;
let (value, _value_ty, span) = lower_expr(builder, &value.value, Some(variant));
let (value, _value_ty, span) = lower_expr(builder, &value.value, Some(variant))?;
builder.statements.push(Statement {
span: Some(span),
@ -627,7 +664,7 @@ fn lower_expr(
(RValue::Use(Operand::Move(place), info.span), ty, info.span)
}
}
})
}
fn lower_binary_expr(
@ -636,21 +673,21 @@ fn lower_binary_expr(
op: &ast::BinaryOp,
rhs: &ast::Expression,
type_hint: Option<&TypeKind>,
) -> (ir::RValue, TypeKind, Span) {
) -> Result<(ir::RValue, TypeKind, Span), LoweringError> {
trace!("lowering binary op: {:?}", op);
let (lhs, lhs_ty, _) = if type_hint.is_none() {
let ty = find_expr_type(builder, lhs)
.unwrap_or_else(|| find_expr_type(builder, rhs).expect("cant find type"));
lower_expr(builder, lhs, Some(&ty))
lower_expr(builder, lhs, Some(&ty))?
} else {
lower_expr(builder, lhs, type_hint)
lower_expr(builder, lhs, type_hint)?
};
let (rhs, rhs_ty, _) = if type_hint.is_none() {
let ty = find_expr_type(builder, rhs).unwrap_or(lhs_ty.clone());
lower_expr(builder, rhs, Some(&ty))
lower_expr(builder, rhs, Some(&ty))?
} else {
lower_expr(builder, rhs, type_hint)
lower_expr(builder, rhs, type_hint)?
};
let lhs = match lhs {
@ -697,7 +734,7 @@ fn lower_binary_expr(
}
};
match op {
Ok(match op {
ast::BinaryOp::Arith(op, span) => (
match op {
ast::ArithOp::Add => ir::RValue::BinOp(ir::BinOp::Add, lhs, rhs, *span),
@ -738,10 +775,13 @@ fn lower_binary_expr(
lhs_ty,
*span,
),
}
})
}
fn lower_fn_call(builder: &mut BodyBuilder, info: &ast::FnCallExpr) -> (Operand, TypeKind, Span) {
fn lower_fn_call(
builder: &mut BodyBuilder,
info: &ast::FnCallExpr,
) -> Result<(Operand, TypeKind, Span), LoweringError> {
let fn_id = {
let mod_body = builder.get_module_body();
@ -767,14 +807,14 @@ fn lower_fn_call(builder: &mut BodyBuilder, info: &ast::FnCallExpr) -> (Operand,
let args: Vec<_> = args
.iter()
.map(|x| lower_type(&builder.ctx, x, builder.local_module))
.collect();
.collect::<Result<Vec<_>, LoweringError>>()?;
let ret = ret
.as_ref()
.map(|x| lower_type(&builder.ctx, x, builder.local_module))
.unwrap_or(TypeInfo {
.unwrap_or(Ok(TypeInfo {
span: None,
kind: TypeKind::Unit,
});
}))?;
builder
.ctx
.body
@ -787,7 +827,7 @@ fn lower_fn_call(builder: &mut BodyBuilder, info: &ast::FnCallExpr) -> (Operand,
let mut args = Vec::new();
for (arg, arg_ty) in info.params.iter().zip(args_ty) {
let (rvalue, _rvalue_ty, _span) = lower_expr(builder, arg, Some(&arg_ty.kind));
let (rvalue, _rvalue_ty, _span) = lower_expr(builder, arg, Some(&arg_ty.kind))?;
args.push(rvalue);
}
@ -815,15 +855,15 @@ fn lower_fn_call(builder: &mut BodyBuilder, info: &ast::FnCallExpr) -> (Operand,
terminator_span: Some(info.span),
});
(Operand::Move(dest_place), ret_ty.kind.clone(), info.span)
Ok((Operand::Move(dest_place), ret_ty.kind.clone(), info.span))
}
fn lower_value(
builder: &mut BodyBuilder,
info: &ast::ValueExpr,
type_hint: Option<&TypeKind>,
) -> (Operand, TypeKind, Span) {
match info {
) -> Result<(Operand, TypeKind, Span), LoweringError> {
Ok(match info {
ast::ValueExpr::Bool { value, span } => (
ir::Operand::Constant(ir::ConstData {
span: Some(*span),
@ -959,15 +999,19 @@ fn lower_value(
},
ast::ValueExpr::Str { value: _, span: _ } => todo!(),
ast::ValueExpr::Path(info) => {
let (place, ty, span) = lower_path(builder, info);
let (place, ty, span) = lower_path(builder, info)?;
(Operand::Move(place), ty, span)
}
}
})
}
fn lower_return(builder: &mut BodyBuilder, info: &ast::ReturnStmt, return_type: &TypeKind) {
fn lower_return(
builder: &mut BodyBuilder,
info: &ast::ReturnStmt,
return_type: &TypeKind,
) -> Result<(), LoweringError> {
if let Some(value_expr) = &info.value {
let (value, _ty, span) = lower_expr(builder, value_expr, Some(return_type));
let (value, _ty, span) = lower_expr(builder, value_expr, Some(return_type))?;
builder.statements.push(Statement {
span: Some(span),
kind: StatementKind::Assign(
@ -986,9 +1030,14 @@ fn lower_return(builder: &mut BodyBuilder, info: &ast::ReturnStmt, return_type:
terminator: Terminator::Return,
terminator_span: Some(info.span),
});
Ok(())
}
fn lower_path(builder: &mut BodyBuilder, info: &ast::PathExpr) -> (ir::Place, TypeKind, Span) {
fn lower_path(
builder: &mut BodyBuilder,
info: &ast::PathExpr,
) -> Result<(ir::Place, TypeKind, Span), LoweringError> {
let local = *builder
.name_to_local
.get(&info.first.name)
@ -1017,18 +1066,22 @@ fn lower_path(builder: &mut BodyBuilder, info: &ast::PathExpr) -> (ir::Place, Ty
}
}
(
Ok((
Place {
local,
projection: projection.into(), // todo, array
},
ty,
info.span,
)
))
}
#[allow(clippy::only_used_in_recursion)]
pub fn lower_type(ctx: &BuildCtx, t: &ast::Type, module_id: DefId) -> ir::TypeInfo {
pub fn lower_type(
ctx: &BuildCtx,
t: &ast::Type,
module_id: DefId,
) -> Result<ir::TypeInfo, LoweringError> {
let mut ty = match t.name.name.as_str() {
"()" => ir::TypeInfo {
span: Some(t.span),
@ -1095,7 +1148,10 @@ pub fn lower_type(ctx: &BuildCtx, t: &ast::Type, module_id: DefId) -> ir::TypeIn
kind: TypeKind::Struct(*struct_id),
}
} else {
todo!("{:?}", other)
Err(LoweringError::UnrecognizedType {
span: t.name.span,
name: t.name.name.clone(),
})?
}
}
};
@ -1114,5 +1170,5 @@ pub fn lower_type(ctx: &BuildCtx, t: &ast::Type, module_id: DefId) -> ir::TypeIn
};
}
ty
Ok(ty)
}

106
lib/edlang_lowering/src/prepass.rs
View file

@ -1,12 +1,12 @@
use std::collections::HashMap;
use crate::DefId;
use crate::{errors::LoweringError, DefId};
use super::common::BuildCtx;
use edlang_ast as ast;
use edlang_ir::ModuleBody;
pub fn prepass_module(mut ctx: BuildCtx, mod_def: &ast::Module) -> BuildCtx {
pub fn prepass_module(mut ctx: BuildCtx, mod_def: &ast::Module) -> Result<BuildCtx, LoweringError> {
let module_id = ctx.gen.next_defid();
tracing::debug!("running ir prepass on module {:?}", module_id);
@ -106,11 +106,11 @@ pub fn prepass_module(mut ctx: BuildCtx, mod_def: &ast::Module) -> BuildCtx {
.expect("module should exist");
let next_id = *current_module.symbols.modules.get(&info.name.name).unwrap();
ctx = prepass_sub_module(ctx, &[module_id], next_id, info);
ctx = prepass_sub_module(ctx, &[module_id], next_id, info)?;
}
}
ctx
Ok(ctx)
}
pub fn prepass_sub_module(
@ -118,7 +118,7 @@ pub fn prepass_sub_module(
parent_ids: &[DefId],
module_id: DefId,
mod_def: &ast::Module,
) -> BuildCtx {
) -> Result<BuildCtx, LoweringError> {
tracing::debug!("running ir prepass on submodule {:?}", module_id);
let mut submodule_parents_ids = parent_ids.to_vec();
submodule_parents_ids.push(module_id);
@ -201,14 +201,17 @@ pub fn prepass_sub_module(
for ct in &mod_def.contents {
if let ast::ModuleStatement::Module(info) = ct {
let next_id = ctx.gen.next_defid();
ctx = prepass_sub_module(ctx, &submodule_parents_ids, next_id, info);
ctx = prepass_sub_module(ctx, &submodule_parents_ids, next_id, info)?;
}
}
ctx
Ok(ctx)
}
pub fn prepass_imports(mut ctx: BuildCtx, mod_def: &ast::Module) -> BuildCtx {
pub fn prepass_imports(
mut ctx: BuildCtx,
mod_def: &ast::Module,
) -> Result<BuildCtx, LoweringError> {
let mod_id = *ctx
.body
.top_level_module_names
@ -220,12 +223,34 @@ pub fn prepass_imports(mut ctx: BuildCtx, mod_def: &ast::Module) -> BuildCtx {
.body
.top_level_module_names
.get(&import.module[0].name)
.expect("import module not found");
let mut imported_module = ctx.body.modules.get(imported_module_id).unwrap();
.ok_or_else(|| LoweringError::ModuleNotFound {
span: import.module[0].span,
module: import.module[0].name.clone(),
})?;
let mut imported_module =
ctx.body
.modules
.get(imported_module_id)
.ok_or(LoweringError::IdNotFound {
span: mod_def.span,
id: *imported_module_id,
})?;
for x in import.module.iter().skip(1) {
let imported_module_id = imported_module.symbols.modules.get(&x.name).unwrap();
imported_module = ctx.body.modules.get(imported_module_id).unwrap();
for module_path in import.module.iter().skip(1) {
let imported_module_id = imported_module
.symbols
.modules
.get(&module_path.name)
.ok_or_else(|| LoweringError::ModuleNotFound {
span: module_path.span,
module: module_path.name.clone(),
})?;
imported_module = ctx.body.modules.get(imported_module_id).ok_or({
LoweringError::IdNotFound {
span: module_path.span,
id: *imported_module_id,
}
})?;
}
let mut imports = HashMap::new();
@ -240,7 +265,11 @@ pub fn prepass_imports(mut ctx: BuildCtx, mod_def: &ast::Module) -> BuildCtx {
} else if let Some(id) = imported_module.symbols.constants.get(&sym.name) {
imports.insert(sym.name.clone(), *id);
} else {
panic!("import symbol not found")
Err(LoweringError::ImportNotFound {
module_span: mod_def.span,
import_span: import.span,
symbol: sym.clone(),
})?;
}
}
@ -254,18 +283,18 @@ pub fn prepass_imports(mut ctx: BuildCtx, mod_def: &ast::Module) -> BuildCtx {
for c in &mod_def.contents {
if let ast::ModuleStatement::Module(info) = c {
ctx = prepass_imports_submodule(ctx, info, mod_id);
ctx = prepass_imports_submodule(ctx, info, mod_id)?;
}
}
ctx
Ok(ctx)
}
pub fn prepass_imports_submodule(
mut ctx: BuildCtx,
mod_def: &ast::Module,
parent_id: DefId,
) -> BuildCtx {
) -> Result<BuildCtx, LoweringError> {
let mod_id = *ctx
.body
.modules
@ -274,19 +303,42 @@ pub fn prepass_imports_submodule(
.symbols
.modules
.get(&mod_def.name.name)
.unwrap();
.ok_or_else(|| LoweringError::ModuleNotFound {
span: mod_def.span,
module: mod_def.name.name.clone(),
})?;
for import in &mod_def.imports {
let imported_module_id = ctx
.body
.top_level_module_names
.get(&import.module[0].name)
.expect("import module not found");
let mut imported_module = ctx.body.modules.get(imported_module_id).unwrap();
.ok_or_else(|| LoweringError::ModuleNotFound {
span: import.module[0].span,
module: import.module[0].name.clone(),
})?;
let mut imported_module = ctx.body.modules.get(imported_module_id).ok_or_else(|| {
LoweringError::ModuleNotFound {
span: import.module[0].span,
module: import.module[0].name.clone(),
}
})?;
for x in import.module.iter().skip(1) {
let imported_module_id = imported_module.symbols.modules.get(&x.name).unwrap();
imported_module = ctx.body.modules.get(imported_module_id).unwrap();
for module_path in import.module.iter().skip(1) {
let imported_module_id = imported_module
.symbols
.modules
.get(&module_path.name)
.ok_or_else(|| LoweringError::ModuleNotFound {
span: module_path.span,
module: module_path.name.clone(),
})?;
imported_module = ctx.body.modules.get(imported_module_id).ok_or({
LoweringError::IdNotFound {
span: import.span,
id: *imported_module_id,
}
})?;
}
let mut imports = HashMap::new();
@ -301,7 +353,11 @@ pub fn prepass_imports_submodule(
} else if let Some(id) = imported_module.symbols.constants.get(&sym.name) {
imports.insert(sym.name.clone(), *id);
} else {
panic!("import symbol not found")
Err(LoweringError::ImportNotFound {
module_span: mod_def.span,
import_span: import.span,
symbol: sym.clone(),
})?;
}
}
@ -313,5 +369,5 @@ pub fn prepass_imports_submodule(
.extend(imports);
}
ctx
Ok(ctx)
}

8
lib/edlang_span/src/lib.rs
View file

@ -1,3 +1,5 @@
use std::ops::Range;
#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Default, Hash)]
pub struct Span {
pub lo: usize,
@ -9,3 +11,9 @@ impl Span {
Self { lo, hi }
}
}
impl From<Span> for Range<usize> {
fn from(val: Span) -> Self {
val.lo..val.hi
}
}