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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
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@@ -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));