chore: prepare for v0.10.0-alpha.1

src/syntax/document.rs

@@ -0,0 +1,128 @@
+use nom::{
+    combinator::{iterator, opt},
+    IResult,
+};
+
+use super::{
+    combinator::{blank_lines, debug_assert_lossless, node, GreenElement},
+    headline::{headline_node, section_node},
+    input::Input,
+    SyntaxKind::*,
+};
+
+pub fn document_node(input: Input) -> IResult<Input, GreenElement, ()> {
+    debug_assert_lossless(document_node_base)(input)
+}
+
+fn document_node_base(input: Input) -> IResult<Input, GreenElement, ()> {
+    let mut children = vec![];
+
+    let (input, pre_blank) = blank_lines(input)?;
+
+    children.extend(pre_blank);
+
+    let (input, section) = opt(section_node)(input)?;
+    if let Some(section) = section {
+        children.push(section);
+    }
+
+    let mut it = iterator(input, headline_node);
+    children.extend(&mut it);
+    let (input, _) = it.finish()?;
+
+    debug_assert!(input.is_empty());
+
+    Ok((input, node(DOCUMENT, children)))
+}
+
+#[test]
+fn parse() {
+    use crate::ast::Document;
+    use crate::tests::to_ast;
+
+    let to_document = to_ast::<Document>(document_node);
+
+    insta::assert_debug_snapshot!(
+        to_document("").syntax,
+        @r###"
+    DOCUMENT@0..0
+    "###
+    );
+
+    insta::assert_debug_snapshot!(
+        to_document("\n  \n\n").syntax,
+        @r###"
+    DOCUMENT@0..5
+      BLANK_LINE@0..1
+        NEW_LINE@0..1 "\n"
+      BLANK_LINE@1..4
+        WHITESPACE@1..3 "  "
+        NEW_LINE@3..4 "\n"
+      BLANK_LINE@4..5
+        NEW_LINE@4..5 "\n"
+    "###
+    );
+
+    insta::assert_debug_snapshot!(
+        to_document("section").syntax,
+        @r###"
+    DOCUMENT@0..7
+      SECTION@0..7
+        PARAGRAPH@0..7
+          TEXT@0..7 "section"
+    "###
+    );
+
+    insta::assert_debug_snapshot!(
+        to_document("\n* section").syntax,
+        @r###"
+    DOCUMENT@0..10
+      BLANK_LINE@0..1
+        NEW_LINE@0..1 "\n"
+      HEADLINE@1..10
+        HEADLINE_STARS@1..2 "*"
+        WHITESPACE@2..3 " "
+        HEADLINE_TITLE@3..10
+          TEXT@3..10 "section"
+    "###
+    );
+
+    insta::assert_debug_snapshot!(
+        to_document("\n** heading 2\n* heading 1").syntax,
+        @r###"
+    DOCUMENT@0..25
+      BLANK_LINE@0..1
+        NEW_LINE@0..1 "\n"
+      HEADLINE@1..14
+        HEADLINE_STARS@1..3 "**"
+        WHITESPACE@3..4 " "
+        HEADLINE_TITLE@4..13
+          TEXT@4..13 "heading 2"
+        NEW_LINE@13..14 "\n"
+      HEADLINE@14..25
+        HEADLINE_STARS@14..15 "*"
+        WHITESPACE@15..16 " "
+        HEADLINE_TITLE@16..25
+          TEXT@16..25 "heading 1"
+    "###
+    );
+
+    insta::assert_debug_snapshot!(
+        to_document("section\n** heading 2\n*heading 1").syntax,
+        @r###"
+    DOCUMENT@0..31
+      SECTION@0..8
+        PARAGRAPH@0..8
+          TEXT@0..8 "section\n"
+      HEADLINE@8..31
+        HEADLINE_STARS@8..10 "**"
+        WHITESPACE@10..11 " "
+        HEADLINE_TITLE@11..20
+          TEXT@11..20 "heading 2"
+        NEW_LINE@20..21 "\n"
+        SECTION@21..31
+          PARAGRAPH@21..31
+            TEXT@21..31 "*heading 1"
+    "###
+    );
+}