Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 80 insertions, 0 deletions

diff --git a/third_party/rust/fluent-syntax/src/parser/comment.rs b/third_party/rust/fluent-syntax/src/parser/comment.rs
new file mode 100644
index 0000000000..3ab97ffb92
--- /dev/null
+++ b/third_party/rust/fluent-syntax/src/parser/comment.rs
@@ -0,0 +1,80 @@
+use super::{Parser, Result, Slice};
+use crate::ast;
+
+#[derive(Debug, PartialEq, Clone, Copy)]
+pub(super) enum Level {
+    None = 0,
+    Regular = 1,
+    Group = 2,
+    Resource = 3,
+}
+
+impl<'s, S> Parser<S>
+where
+    S: Slice<'s>,
+{
+    pub(super) fn get_comment(&mut self) -> Result<(ast::Comment<S>, Level)> {
+        let mut level = Level::None;
+        let mut content = vec![];
+
+        while self.ptr < self.length {
+            let line_level = self.get_comment_level();
+            if line_level == Level::None {
+                self.ptr -= 1;
+                break;
+            } else if level != Level::None && line_level != level {
+                self.ptr -= line_level as usize;
+                break;
+            }
+
+            level = line_level;
+
+            if self.ptr == self.length {
+                break;
+            } else if self.is_current_byte(b'\n') {
+                content.push(self.get_comment_line()?);
+            } else {
+                if let Err(e) = self.expect_byte(b' ') {
+                    if content.is_empty() {
+                        return Err(e);
+                    } else {
+                        self.ptr -= line_level as usize;
+                        break;
+                    }
+                }
+                content.push(self.get_comment_line()?);
+            }
+            self.skip_eol();
+        }
+
+        Ok((ast::Comment { content }, level))
+    }
+
+    fn get_comment_level(&mut self) -> Level {
+        let mut chars = 0;
+
+        for _ in 0..3 {
+            if self.take_byte_if(b'#') {
+                chars += 1;
+            }
+        }
+
+        match chars {
+            0 => Level::None,
+            1 => Level::Regular,
+            2 => Level::Group,
+            3 => Level::Resource,
+            _ => unreachable!(),
+        }
+    }
+
+    fn get_comment_line(&mut self) -> Result<S> {
+        let start_pos = self.ptr;
+
+        while self.ptr < self.length && !self.is_eol() {
+            self.ptr += 1;
+        }
+
+        Ok(self.source.slice(start_pos..self.ptr))
+    }
+}