26 lines
672 B
Rust
26 lines
672 B
Rust
use aho_corasick::AhoCorasick;
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use lazy_static::lazy_static;
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use crate::ast::NodeData;
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use crate::parse::Code;
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lazy_static! {
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static ref INSTRUCTION_END: AhoCorasick = AhoCorasick::new(&["?>"]);
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}
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pub fn parse_instruction(code: &mut Code) -> NodeData {
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debug_assert!(code.as_slice().starts_with(b"<?"));
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code.shift(2);
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let (len, matched) = match INSTRUCTION_END.find(code.as_slice()) {
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Some(m) => (m.start(), m.end() - m.start()),
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None => (code.rem(), 0),
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};
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let data = code.copy_and_shift(len);
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// It might be EOF.
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code.shift(matched);
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NodeData::Instruction {
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code: data,
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ended: matched > 0,
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}
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}
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