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typecheck chained pointer operations

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This commit is contained in:
Antoni Piasecki
2026-05-13 14:11:05 +02:00
parent 027245684d
commit 284bc61f24
2 changed files with 12 additions and 35 deletions
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29
src/codegen_x86_64.rs
View File

@@ -8,6 +8,7 @@ use crate::{
struct Var {
pub stack_offset: usize,
#[allow(unused)]
pub var_type: String,
}
@@ -599,7 +600,7 @@ _builtin_environ:
ExprKind::MemberAccess { left, field } => {
emit!(&mut self.output, " push rax");
let offset = self.get_field_offset(env, left, field)?;
let offset = self.get_field_offset(left, field)?;
self.compile_expr(env, left)?;
emit!(&mut self.output, " pop rbx");
@@ -742,7 +743,7 @@ _builtin_environ:
emit!(&mut self.output, " pop rax");
}
ExprKind::MemberAccess { left, field } => {
let offset = self.get_field_offset(env, left, field)?;
let offset = self.get_field_offset(left, field)?;
self.compile_expr(env, left)?;
emit!(&mut self.output, " mov rax, QWORD [rax+{}]", offset);
}
@@ -753,28 +754,10 @@ _builtin_environ:
Ok(())
}
fn get_field_offset(
&self,
env: &mut Env,
left: &Expr,
field: &Token,
) -> Result<usize, ZernError> {
let struct_name = match &left.kind {
ExprKind::Variable(name) => match env.get_var(&name.lexeme) {
Some(v) => v.var_type.clone(),
None => {
return error!(name.loc, format!("undefined variable: {}", &name.lexeme));
}
},
_ => {
return error!(
&field.loc,
"cannot determine struct type for member assignment"
);
}
};
fn get_field_offset(&self, left: &Expr, field: &Token) -> Result<usize, ZernError> {
let struct_name = &self.expr_types[&left.id];
let fields = match self.symbol_table.structs.get(&struct_name) {
let fields = match self.symbol_table.structs.get(struct_name) {
Some(f) => f,
None => {
return error!(&field.loc, format!("unknown struct type: {}", struct_name));

18
src/std/std.zr
View File

@@ -55,8 +55,7 @@ func mem._split_block[blk: mem.Block, needed: i64] : void
new_blk->prev = blk
if blk->next as ptr
let next = blk->next
next->prev = new_blk
blk->next->prev = new_blk
else
mem.write64(_builtin_heap_tail(), new_blk)
@@ -133,8 +132,7 @@ func mem.free[x: any] : void
blk->size = blk->size + MEM_BLOCK_SIZE + next->size
blk->next = next->next
if next->next as ptr
let b = next->next
b->prev = blk
next->next->prev = blk
if mem.read64(_builtin_heap_tail()) == next as ptr
mem.write64(_builtin_heap_tail(), blk)
@@ -145,8 +143,7 @@ func mem.free[x: any] : void
prev->size = prev->size + MEM_BLOCK_SIZE + blk->size
prev->next = blk->next
if blk->next as ptr
let b = blk->next
b->prev = prev
blk->next->prev = prev
if mem.read64(_builtin_heap_tail()) == blk as ptr
mem.write64(_builtin_heap_tail(), prev)
blk = prev
@@ -154,13 +151,11 @@ func mem.free[x: any] : void
let block_total = blk->size + MEM_BLOCK_SIZE
if (blk as i64 & 4095) == 0 && (block_total & 4095) == 0
if blk->prev as ptr
let b = blk->prev
b->next = blk->next
blk->prev->next = blk->next
else
mem.write64(_builtin_heap_head(), blk->next)
if blk->next as ptr
let b = blk->next
b->prev = blk->prev
blk->next->prev = blk->prev
else
mem.write64(_builtin_heap_tail(), blk->prev)
_builtin_syscall(SYS_munmap, blk, block_total)
@@ -194,8 +189,7 @@ func mem.realloc?[x: ptr, new_size: i64] : ptr
blk->size = combined
blk->next = next->next
if next->next as ptr
let b = next->next
b->prev = blk
next->next->prev = blk
if mem.read64(_builtin_heap_tail()) == next as ptr
mem.write64(_builtin_heap_tail(), blk)
mem._split_block(blk, new_size)