Croissant Runtime
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crsn/crsn_stacks/src/parse.rs

62 lines
1.5 KiB

use crsn::asm::data::literal::Value;
use crsn::asm::error::Error;
use crsn::asm::instr::Op;
use crsn::asm::parse::arg_parser::ArgParser;
use crsn::module::{CrsnExtension, ParseOpRes};
use crsn::runtime::fault::Fault;
use crsn::runtime::run_thread::{RunState, ThreadInfo};
use crate::defs::StackOp;
#[derive(Debug, Clone)]
pub struct StackOps {
_internal: ()
}
impl StackOps {
pub fn new() -> Box<dyn CrsnExtension> {
Box::new(Self {
_internal: ()
})
}
}
impl CrsnExtension for StackOps {
fn name(&self) -> &'static str {
"stacks"
}
fn parse_op(&self, keyword: &str, mut args: ArgParser) -> Result<ParseOpRes, Error> {
Ok(ParseOpRes::Parsed(Op::Ext(Box::new(match keyword {
"stack" => {
StackOp::NewStack {
dst: args.next_wr()?,
}
}
"push" => {
StackOp::Push {
obj: args.next_rdobj()?,
src: args.next_rd()?,
}
}
"pop" => {
StackOp::Pop {
dst: args.next_wr()?,
obj: args.next_rdobj()?,
}
}
_other => {
return Ok(ParseOpRes::Unknown(args));
}
}))))
}
fn drop_obj(&self, _ti: &ThreadInfo, state: &mut RunState, handle: Value) -> Result<Option<()>, Fault>
{
crate::exec::drop_stack(state, handle)
}
}