1 files changed, 61 insertions, 0 deletions
diff --git a/third_party/rust/fluent-syntax/src/parser/runtime.rs b/third_party/rust/fluent-syntax/src/parser/runtime.rs
new file mode 100644
index 0000000000..e116ceaeed
--- /dev/null
+++ b/third_party/rust/fluent-syntax/src/parser/runtime.rs
@@ -0,0 +1,61 @@
+use super::{
+    core::{Parser, Result},
+    errors::ParserError,
+    slice::Slice,
+};
+use crate::ast;
+
+impl<'s, S> Parser<S>
+where
+    S: Slice<'s>,
+{
+    pub fn parse_runtime(
+        mut self,
+    ) -> std::result::Result<ast::Resource<S>, (ast::Resource<S>, Vec<ParserError>)> {
+        let mut errors = vec![];
+
+        // That default allocation gives the lowest
+        // number of instructions and cycles in ioi.
+        let mut body = Vec::with_capacity(6);
+
+        self.skip_blank_block();
+
+        while self.ptr < self.length {
+            let entry_start = self.ptr;
+            let entry = self.get_entry_runtime(entry_start);
+
+            match entry {
+                Ok(Some(entry)) => {
+                    body.push(entry);
+                }
+                Ok(None) => {}
+                Err(mut err) => {
+                    self.skip_to_next_entry_start();
+                    err.slice = Some(entry_start..self.ptr);
+                    errors.push(err);
+                    let content = self.source.slice(entry_start..self.ptr);
+                    body.push(ast::Entry::Junk { content });
+                }
+            }
+            self.skip_blank_block();
+        }
+
+        if errors.is_empty() {
+            Ok(ast::Resource { body })
+        } else {
+            Err((ast::Resource { body }, errors))
+        }
+    }
+
+    fn get_entry_runtime(&mut self, entry_start: usize) -> Result<Option<ast::Entry<S>>> {
+        let entry = match get_current_byte!(self) {
+            Some(b'#') => {
+                self.skip_comment();
+                None
+            }
+            Some(b'-') => Some(ast::Entry::Term(self.get_term(entry_start)?)),
+            _ => Some(ast::Entry::Message(self.get_message(entry_start)?)),
+        };
+        Ok(entry)
+    }
+}