chore: reorganize directories

src/syntax/paragraph.rs

@@ -0,0 +1,101 @@
+use nom::{IResult, InputTake};
+
+use super::{
+    combinator::{blank_lines, line_ends_iter, node, GreenElement},
+    input::Input,
+    keyword::affiliated_keyword_nodes,
+    object::standard_object_nodes,
+    SyntaxKind,
+};
+
+/// Recognizes one paragraph
+pub fn paragraph_node(input: Input) -> IResult<Input, GreenElement, ()> {
+    crate::lossless_parser!(paragraph_node_base, input)
+}
+
+/// Recognizes multiple paragraphs
+pub fn paragraph_nodes(input: Input) -> Result<Vec<GreenElement>, nom::Err<()>> {
+    let mut i = input;
+    let mut children = vec![];
+    while !i.is_empty() {
+        let (input, node) = paragraph_node(i)?;
+        children.push(node);
+        debug_assert!(i.len() > input.len(), "{} > {}", i.len(), input.len());
+        i = input;
+    }
+    Ok(children)
+}
+
+fn paragraph_node_base(input: Input) -> IResult<Input, GreenElement, ()> {
+    debug_assert!(!input.is_empty());
+
+    let (input, keywords) = affiliated_keyword_nodes(input)?;
+
+    let mut start = 0;
+    for idx in line_ends_iter(input.as_str()) {
+        // stops at blank line
+        if input.s[start..idx].bytes().all(|c| c.is_ascii_whitespace()) {
+            break;
+        }
+
+        start = idx;
+    }
+
+    let (input, contents) = input.take_split(start);
+    let (input, post_blank) = blank_lines(input)?;
+
+    let mut children = vec![];
+    children.extend(keywords);
+    children.extend(standard_object_nodes(contents));
+    children.extend(post_blank);
+
+    Ok((input, node(SyntaxKind::PARAGRAPH, children)))
+}
+
+#[test]
+fn parse() {
+    use crate::{ast::Paragraph, tests::to_ast};
+
+    let to_paragraph = to_ast::<Paragraph>(paragraph_node);
+
+    insta::assert_debug_snapshot!(
+        to_paragraph(r#"a"#).syntax,
+        @r###"
+    PARAGRAPH@0..1
+      TEXT@0..1 "a"
+    "###
+    );
+
+    insta::assert_debug_snapshot!(
+        to_paragraph(r#"a
+    "#).syntax,
+        @r###"
+    PARAGRAPH@0..6
+      TEXT@0..2 "a\n"
+      BLANK_LINE@2..6 "    "
+    "###
+    );
+
+    insta::assert_debug_snapshot!(
+        to_paragraph(r#"a
+b
+c
+"#).syntax,
+        @r###"
+    PARAGRAPH@0..6
+      TEXT@0..6 "a\nb\nc\n"
+    "###
+    );
+
+    insta::assert_debug_snapshot!(
+        to_paragraph(r#"a
+
+c
+"#).syntax,
+        @r###"
+    PARAGRAPH@0..3
+      TEXT@0..2 "a\n"
+      BLANK_LINE@2..3 "\n"
+    "###
+    );
+}