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20 lines
727 B
20 lines
727 B
use sexp::Sexp;
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use crate::asm::error::CrsnError;
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use crate::asm::instr::{Cond, cond, Flatten};
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use crate::asm::parse::parse_instr::parse_instructions;
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use crate::asm::parse::ParserContext;
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use crate::asm::parse::sexp_expect::{expect_list, expect_string_atom};
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use crate::asm::patches::TryRemove;
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pub fn parse_cond_branch(tok: Sexp, parsers: &ParserContext) -> Result<(Cond, Box<dyn Flatten>), CrsnError> {
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let mut list = expect_list(Some(tok), false)?;
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let kw = expect_string_atom(list.try_remove(0))?;
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if !kw.ends_with('?') {
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return Err(CrsnError::Parse(format!("Condition must end with '?': {}", kw).into()));
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}
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Ok((cond::parse_cond(&kw)?, parse_instructions(list.into_iter(), parsers)?))
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}
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