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use {Token, File, FileBuilder, Sink, SyntaxKind};
use syntax_kinds::*;
mod event_parser;
use self::event_parser::Event;
pub fn parse(text: String, tokens: &[Token]) -> File {
let events = event_parser::parse(&text, tokens);
from_events_to_file(text, tokens, events)
}
fn from_events_to_file(
text: String,
tokens: &[Token],
events: Vec<Event>,
) -> File {
let mut builder = FileBuilder::new(text);
let mut idx = 0;
for event in events {
match event {
Event::Start { kind } => builder.start_internal(kind),
Event::Finish => {
while idx < tokens.len() {
let token = tokens[idx];
if is_insignificant(token.kind) {
idx += 1;
builder.leaf(token.kind, token.len);
} else {
break;
}
}
builder.finish_internal()
},
Event::Token { kind, mut n_raw_tokens } => loop {
let token = tokens[idx];
if !is_insignificant(token.kind) {
n_raw_tokens -= 1;
}
idx += 1;
builder.leaf(token.kind, token.len);
if n_raw_tokens == 0 {
break;
}
},
Event::Error { message } => builder.error().message(message).emit(),
}
}
builder.finish()
}
fn is_insignificant(kind: SyntaxKind) -> bool {
match kind {
WHITESPACE | COMMENT => true,
_ => false,
}
}
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