chore: prepare for v0.10.0-alpha.1

src/syntax/fixed_width.rs

@@ -0,0 +1,64 @@
+use nom::{IResult, InputTake};
+
+use super::{
+    combinator::{blank_lines, debug_assert_lossless, line_ends_iter, node, GreenElement},
+    input::Input,
+    SyntaxKind,
+};
+
+fn fixed_width_node_base(input: Input) -> IResult<Input, GreenElement, ()> {
+    let mut start = 0;
+    for i in line_ends_iter(input.as_str()) {
+        let line = &input.s[start..i];
+        let trimmed = line.trim_start();
+
+        if trimmed == ":" || trimmed == ":\n" || trimmed == ":\r\n" || trimmed.starts_with(": ") {
+            start = i;
+        } else {
+            break;
+        }
+    }
+
+    if start == 0 {
+        return Err(nom::Err::Error(()));
+    }
+
+    let (input, contents) = input.take_split(start);
+    let (input, post_blank) = blank_lines(input)?;
+
+    let mut children = vec![];
+    children.push(contents.text_token());
+    children.extend(post_blank);
+
+    Ok((input, node(SyntaxKind::FIXED_WIDTH, children)))
+}
+
+pub fn fixed_width_node(input: Input) -> IResult<Input, GreenElement, ()> {
+    debug_assert_lossless(fixed_width_node_base)(input)
+}
+
+#[test]
+fn parse() {
+    use crate::{ast::FixedWidth, tests::to_ast};
+
+    let to_fixed_width = to_ast::<FixedWidth>(fixed_width_node);
+
+    insta::assert_debug_snapshot!(
+        to_fixed_width(
+            r#": A
+:
+: B
+: C
+
+    "#
+        ).syntax,
+        @r###"
+    FIXED_WIDTH@0..19
+      TEXT@0..14 ": A\n:\n: B\n: C\n"
+      BLANK_LINE@14..15
+        NEW_LINE@14..15 "\n"
+      BLANK_LINE@15..19
+        WHITESPACE@15..19 "    "
+    "###
+    );
+}