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#![allow(unused_assignments)]
mod comment;
mod string;
mod sublang;
use std::collections::HashMap;
use nom::{
branch::alt,
bytes::complete::tag,
character::complete::{anychar, space0},
combinator::{eof, map_res, peek},
multi::many_till,
sequence::tuple,
IResult,
};
use crate::{
error::CoreError,
language::{LanguageSyntax, LanguageType, SyntaxType},
parser::NomError,
};
use self::{
comment::multi_comment,
string::{litral_string, normal_string},
sublang::split_sublang_part,
};
use super::{tag_all, ParseResult};
#[derive(Debug, Clone)]
pub struct CoreParser {
content: String,
syntax: LanguageSyntax,
}
impl CoreParser {
pub fn from_lang(lang: &LanguageType) -> Self {
Self {
content: String::new(),
syntax: lang.get_language_syntax(),
}
}
pub fn init_content(&mut self, content: &str) {
self.content = content.to_string();
}
pub fn split_lines(&self) -> impl Iterator<Item = &str> {
self.content.split_terminator('\n').map(|line| {
let Some(line) = line.strip_suffix('\r') else { return line };
let Some(line) = line.strip_suffix('\n') else { return line };
line
})
}
pub fn parse(&self) -> Result<ParseResult, CoreError> {
Self::parse_lines(self.split_lines(), &self.syntax)
}
pub fn parse_lines<'a>(
lines: impl Iterator<Item = &'a str>,
syntax: &LanguageSyntax,
) -> Result<ParseResult, CoreError> {
let mut result = ParseResult::default();
let mut lines = lines;
let mut trailing_line: Option<&str> = None;
let mut prev_is_code = false;
loop {
let (line, mut is_newline) = if let Some(t) = trailing_line {
trailing_line = None;
if t.is_empty() {
prev_is_code = false;
continue;
}
(t, false)
} else if let Some(t) = lines.next() {
result.all += 1;
prev_is_code = false;
(t, true)
} else {
break;
};
let line = if is_newline {
if let Some(pf) = syntax.line_prefix {
let (input, _) = tag::<_, _, NomError>(pf)(line)?;
input
} else {
line
}
} else {
line
};
if line.is_empty() || tuple((space0::<_, NomError>, eof))(line).is_ok() {
if !prev_is_code && is_newline {
result.blank += 1;
}
} else {
let parsed: IResult<&str, (Vec<char>, SyntaxType)> = many_till(
anychar,
peek(alt((
map_res(tag_all(syntax.sublang_pairs, |p| p.0.left), |_| {
Ok::<_, NomError>(SyntaxType::SubLanguage)
}),
map_res(tag_all(syntax.doc_comment_pairs, |p| p.left), |_| {
Ok::<_, NomError>(SyntaxType::DocMultiComment)
}),
map_res(tag_all(syntax.comment_pairs, |p| p.left), |_| {
Ok::<_, NomError>(SyntaxType::MultiComment)
}),
map_res(tag_all(syntax.literal_quote_pairs, |p| p.left), |_| {
Ok::<_, NomError>(SyntaxType::LitString)
}),
map_res(tag_all(syntax.doc_quote_pairs, |p| p.left), |_| {
Ok::<_, NomError>(SyntaxType::DocString)
}),
map_res(tag_all(syntax.quote_pairs, |p| p.left), |_| {
Ok::<_, NomError>(SyntaxType::String)
}),
map_res(tag_all(syntax.doc_comment, |p| *p), |_| {
Ok::<_, NomError>(SyntaxType::DocComment)
}),
map_res(tag_all(syntax.simple_comment, |p| *p), |_| {
Ok::<_, NomError>(SyntaxType::SimpleComment)
}),
))),
)(line);
if let Ok((rest, (chars, syntax_type))) = parsed {
if !prev_is_code
&& !matches!(
syntax_type,
SyntaxType::DocString
| SyntaxType::LitString
| SyntaxType::String
| SyntaxType::Code
)
&& !chars.is_empty()
&& !space0::<_, NomError>(chars.into_iter().collect::<String>().as_str())?
.0
.is_empty()
{
prev_is_code = true;
is_newline = false;
result.code += 1;
}
match syntax_type {
SyntaxType::SubLanguage => {
let (rest, (pair, lang_type)) =
tag_all(syntax.sublang_pairs, |p| p.0.left)(rest)?;
let (trailing_s, parsed) =
split_sublang_part(pair, lang_type, rest, &mut lines)?;
trailing_line = Some(trailing_s);
result.join((*lang_type, parsed));
if !is_newline {
result.all -= 1;
}
prev_is_code = false;
}
SyntaxType::DocComment => {
trailing_line = None;
result.comment.doc += 1;
}
SyntaxType::SimpleComment => {
trailing_line = None;
result.comment.normal += 1;
}
SyntaxType::DocMultiComment => {
let (rest, pair) = tag_all(syntax.doc_comment_pairs, |p| p.left)(rest)?;
let mut leading_map: HashMap<&str, usize> = HashMap::new();
leading_map.insert(pair.left, 1);
let mut trailing_map: HashMap<&str, usize> = HashMap::new();
result.comment.doc += 1;
if let Some(trailing) =
multi_comment(&mut leading_map, &mut trailing_map, syntax, rest)
{
trailing_line = Some(trailing)
} else {
'doc_comment: loop {
if let Some(comment_line) = lines.next() {
result.all += 1;
result.comment.doc += 1;
if let Some(trailing) = multi_comment(
&mut leading_map,
&mut trailing_map,
syntax,
comment_line,
) {
trailing_line = Some(trailing);
break 'doc_comment;
} else {
continue 'doc_comment;
}
} else {
return Err(CoreError::SyntaxError(
"No Comment Ending found.".to_string(),
));
}
}
}
prev_is_code = false;
}
SyntaxType::MultiComment => {
let (rest, pair) = tag_all(syntax.comment_pairs, |p| p.left)(rest)?;
let mut leading_map: HashMap<&str, usize> = HashMap::new();
leading_map.insert(pair.left, 1);
let mut trailing_map: HashMap<&str, usize> = HashMap::new();
result.comment.normal += 1;
if let Some(trailing) =
multi_comment(&mut leading_map, &mut trailing_map, syntax, rest)
{
trailing_line = Some(trailing)
} else {
'normal_comment: loop {
if let Some(comment_line) = lines.next() {
result.all += 1;
result.comment.normal += 1;
if let Some(trailing) = multi_comment(
&mut leading_map,
&mut trailing_map,
syntax,
comment_line,
) {
trailing_line = Some(trailing);
break 'normal_comment;
} else {
continue 'normal_comment;
}
} else {
return Err(CoreError::SyntaxError(
"No Comment Ending found.".to_string(),
));
}
}
}
prev_is_code = false;
}
SyntaxType::DocString => {
let (rest, pair) = tag_all(syntax.doc_quote_pairs, |p| p.left)(rest)?;
if !prev_is_code {
result.code += 1;
}
if let Some(trailing) = normal_string(rest, pair) {
result.comment.doc_quote += 1;
trailing_line = Some(trailing);
} else {
result.comment.doc_quote += 1;
'quote: loop {
if let Some(comment_line) = lines.next() {
result.all += 1;
result.code += 1;
result.comment.doc_quote += 1;
if let Some(trailing) = normal_string(comment_line, pair) {
trailing_line = Some(trailing);
break 'quote;
} else {
continue 'quote;
}
} else {
return Err(CoreError::SyntaxError(
"No Normal Document Quote Ending found.".to_string(),
));
}
}
}
prev_is_code = true;
}
SyntaxType::LitString => {
let (rest, pair) =
tag_all(syntax.literal_quote_pairs, |p| p.left)(rest)?;
if !prev_is_code {
result.code += 1;
}
if let Some(trailing) = litral_string(rest, pair) {
trailing_line = Some(trailing)
} else {
'lit_quote: loop {
if let Some(comment_line) = lines.next() {
result.all += 1;
result.code += 1;
if let Some(trailing) = litral_string(comment_line, pair) {
trailing_line = Some(trailing);
break 'lit_quote;
} else {
continue 'lit_quote;
}
} else {
return Err(CoreError::SyntaxError(
"No Literal Quote Ending found.".to_string(),
));
}
}
}
prev_is_code = true;
}
SyntaxType::String => {
let (rest, pair) = tag_all(syntax.quote_pairs, |p| p.left)(rest)?;
if !prev_is_code {
result.code += 1;
}
if let Some(trailing) = normal_string(rest, pair) {
trailing_line = Some(trailing)
} else {
'quote: loop {
if let Some(comment_line) = lines.next() {
result.all += 1;
result.code += 1;
if let Some(trailing) = normal_string(comment_line, pair) {
trailing_line = Some(trailing);
break 'quote;
} else {
continue 'quote;
}
} else {
return Err(CoreError::SyntaxError(
"No Normal Quote Ending found.".to_string(),
));
}
}
}
prev_is_code = true;
}
SyntaxType::Soi
| SyntaxType::Blank
| SyntaxType::Code
| SyntaxType::Eoi => unreachable!(),
}
} else if !prev_is_code {
trailing_line = None;
prev_is_code = false;
result.code += 1;
}
}
// dbg!((line, &result, is_newline, trailing_line));
}
Ok(result)
}
}