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38 lines
1.3 KiB
38 lines
1.3 KiB
use crate::asm::error::CrsnError;
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use crate::asm::instr::cond::parse_cond;
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use crate::asm::instr::Op;
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use crate::asm::parse::arg_parser::TokenParser;
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use crate::builtin::parse::BuiltinOps;
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use crate::module::ParseRes;
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pub fn parse_op<'a>(mut keyword: &str, mut arg_tokens: TokenParser<'a>) -> Result<Option<Op>, CrsnError> {
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// Include built-in instructions
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let builtins = [BuiltinOps::new()];
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let mut cond = None;
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if let Some(pos) = keyword.find('.') {
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cond = Some(parse_cond(&keyword[(pos + 1)..])?);
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keyword = &keyword[..pos];
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}
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for p in builtins.iter().chain(arg_tokens.pcx.parsers) {
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arg_tokens = match p.parse_op(keyword, arg_tokens) {
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Ok(ParseRes::Parsed(kind)) => return Ok(Some(Op {
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cond,
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kind,
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})),
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Ok(ParseRes::ParsedNone) => return Ok(None),
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Ok(ParseRes::Unknown(to_reuse)) => {
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if to_reuse.parsing_started() {
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panic!("Module \"{}\" started parsing {}, but returned Unknown!", p.name(), keyword);
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}
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to_reuse
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}
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Err(err) => {
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return Err(err);
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}
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}
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}
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return Err(CrsnError::Parse(format!("Unknown instruction: {}", keyword).into()));
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}
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