47 lines
1.2 KiB
Rust
47 lines
1.2 KiB
Rust
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use super::parser::Parser;
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use super::StringComponent;
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pub fn parse_string_literal(src: &str) -> StringComponentIterator {
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StringComponentIterator {
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parser: Parser::new(src),
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has_closing_quote: false,
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}
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}
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pub struct StringComponentIterator<'a> {
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parser: Parser<'a>,
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pub has_closing_quote: bool,
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}
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impl<'a> Iterator for StringComponentIterator<'a> {
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type Item = StringComponent;
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fn next(&mut self) -> Option<StringComponent> {
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if self.parser.pos == 0 {
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assert!(
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self.parser.advance() == '"',
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"string literal should start with double quotes"
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);
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}
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if let Some(component) = self.parser.parse_string_component() {
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return Some(component);
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}
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// We get here when there are no char components left to parse
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if self.parser.peek() == Some('"') {
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self.parser.advance();
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self.has_closing_quote = true;
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}
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assert!(
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self.parser.peek() == None,
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"string literal should leave no unparsed input: src = {}, pos = {}, length = {}",
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self.parser.src,
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self.parser.pos,
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self.parser.src.len()
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);
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None
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}
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}
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