Croissant Runtime
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crsn/crsn_stacks/src/parse.rs

49 lines
1.1 KiB

use crsn::asm::error::Error;
use crsn::asm::instr::op::{AsmModule, ParseOpResult};
use crsn::asm::instr::Op;
use crsn::asm::parse::arg_parser::ArgParser;
use crate::defs::StackOp;
#[derive(Debug, Clone)]
pub struct StackOps {
_internal: ()
}
impl StackOps {
pub fn new() -> Box<dyn AsmModule> {
Box::new(Self {
_internal: ()
})
}
}
impl AsmModule for StackOps {
fn name(&self) -> &'static str {
"stacks"
}
fn parse_op(&self, keyword: &str, mut args: ArgParser) -> Result<ParseOpResult, Error> {
Ok(ParseOpResult::Parsed(Op::Ext(Box::new(match keyword {
"push" => {
StackOp::Push {
num: args.next_rd()?,
src: args.next_rd()?,
}
}
"pop" => {
StackOp::Pop {
dst: args.next_wr()?,
num: args.next_rd()?,
}
}
_other => {
return Ok(ParseOpResult::Unknown(args));
}
}))))
}
}