爱特每羊队
24 lines
935 B
Rust
24 lines
935 B
Rust
use crate::compiler::{CompileCtx, Compiler};
|
|
use oxide_ir::inst::Inst;
|
|
use oxide_parser::Statement;
|
|
|
|
impl Compiler {
|
|
pub(crate) fn emit_do_while_statement(&self, stmt: &Statement, ctx: &mut CompileCtx) -> Result<Option<u8>, String> {
|
|
let Statement::DoWhileStatement(dw) = stmt else {
|
|
return Ok(None);
|
|
};
|
|
let start_label = ctx.next_label_id();
|
|
let end_label = ctx.next_label_id();
|
|
ctx.labels.set_label_pos(start_label, ctx.insts.len());
|
|
ctx.push_loop(end_label, start_label);
|
|
let n_labeled = ctx.take_pending_loop_labels(end_label, start_label);
|
|
self.emit_statement(&dw.body, ctx)?;
|
|
let test_reg = self.emit_expression(&dw.test, ctx)?;
|
|
ctx.inst(Inst::jmp_if_true(test_reg, start_label));
|
|
ctx.labels.set_label_pos(end_label, ctx.insts.len());
|
|
ctx.pop_label_scopes(n_labeled);
|
|
ctx.pop_loop();
|
|
Ok(None)
|
|
}
|
|
}
|