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use crate::error::{RableError, Result};
use super::Lexer;
use super::word_builder::{QuotingContext, WordBuilder};
impl Lexer {
/// Reads contents of a single-quoted string (after the opening `'`).
pub(super) fn read_single_quoted(&mut self, wb: &mut WordBuilder) -> Result<()> {
loop {
match self.advance_char() {
Some('\'') => {
wb.push('\'');
return Ok(());
}
Some(c) => wb.push(c),
None => {
return Err(RableError::matched_pair(
"unterminated single quote",
self.pos,
self.line,
));
}
}
}
}
/// Reads contents of an ANSI-C quoted string `$'...'` (after the opening `'`).
/// Unlike regular single quotes, `\` is an escape character here.
pub(super) fn read_ansi_c_quoted(&mut self, wb: &mut WordBuilder) -> Result<()> {
loop {
match self.peek_char() {
Some('\'') => {
self.advance_char();
wb.push('\'');
return Ok(());
}
Some('\\') => {
self.advance_char();
wb.push('\\');
if let Some(next) = self.advance_char() {
wb.push(next);
}
}
Some(c) => {
self.advance_char();
wb.push(c);
}
None => {
return Err(RableError::matched_pair(
"unterminated ANSI-C quote",
self.pos,
self.line,
));
}
}
}
}
/// Reads contents of a double-quoted string (after the opening `"`).
pub(super) fn read_double_quoted(&mut self, wb: &mut WordBuilder) -> Result<()> {
wb.enter_context(QuotingContext::DoubleQuote);
let result = self.read_double_quoted_inner(wb);
wb.leave_context();
result
}
fn read_double_quoted_inner(&mut self, wb: &mut WordBuilder) -> Result<()> {
loop {
match self.peek_char() {
Some('"') => {
self.advance_char();
wb.push('"');
return Ok(());
}
Some('\\') => {
self.advance_char();
// Line continuation: \<newline> is removed in double quotes
if self.peek_char() == Some('\n') {
self.advance_char();
} else {
wb.push('\\');
if let Some(next) = self.advance_char() {
wb.push(next);
} else {
wb.push('\\');
}
}
}
Some('$') => {
// Inside double quotes, $" is NOT a locale string — it's
// bare $ followed by closing ". Don't let read_dollar consume it.
if self.input.get(self.pos + 1) == Some(&'"') {
self.advance_char();
wb.push('$');
} else {
self.read_dollar(wb)?;
}
}
Some('`') => {
self.advance_char();
wb.push('`');
self.read_backtick(wb)?;
}
Some(c) => {
self.advance_char();
wb.push(c);
}
None => {
return Err(RableError::matched_pair(
"unterminated double quote",
self.pos,
self.line,
));
}
}
}
}
}