Switch back to hashtags for headings

src/parse/mod.rs

@@ -61,7 +61,7 @@ fn node(p: &mut Parser, at_start: &mut bool) -> Option<Node> {
         // Markup.
         Token::Star => Node::Strong(span),
         Token::Underscore => Node::Emph(span),
-        Token::Eq => {
+        Token::Hashtag => {
             if *at_start {
                 return Some(heading(p));
             } else {
@@ -128,11 +128,11 @@ fn node(p: &mut Parser, at_start: &mut bool) -> Option<Node> {
 /// Parse a heading.
 fn heading(p: &mut Parser) -> Node {
     let start = p.start();
-    p.assert(Token::Eq);
+    p.assert(Token::Hashtag);
 
     // Count depth.
     let mut level: usize = 1;
-    while p.eat_if(Token::Eq) {
+    while p.eat_if(Token::Hashtag) {
         level += 1;
     }
 

src/parse/tokens.rs

@@ -73,7 +73,7 @@ impl<'s> Iterator for Tokens<'s> {
                 '{' => Token::LeftBrace,
                 '}' => Token::RightBrace,
 
-                // Keywords, variables, functions, colors.
+                // Headings, keywords, identifiers, colors.
                 '#' => self.hash(start),
 
                 // Whitespace.
@@ -93,7 +93,6 @@ impl<'s> Iterator for Tokens<'s> {
                 // Markup.
                 '*' => Token::Star,
                 '_' => Token::Underscore,
-                '=' => Token::Eq,
                 '~' => Token::Tilde,
                 '`' => self.raw(),
                 '$' => self.math(),
@@ -157,6 +156,10 @@ impl<'s> Tokens<'s> {
 
         match self.mode {
             TokenMode::Markup => {
+                if read.is_empty() {
+                    return Token::Hashtag;
+                }
+
                 if let Some(token) = keyword(read) {
                     return token;
                 }
@@ -607,8 +610,8 @@ mod tests {
         // Test markup tokens.
         t!(Markup[" a1"]: "*"  => Star);
         t!(Markup: "_"         => Underscore);
-        t!(Markup[""]: "==="   => Eq, Eq, Eq);
-        t!(Markup["a1/"]: "= " => Eq, Space(0));
+        t!(Markup[""]: "###"   => Hashtag, Hashtag, Hashtag);
+        t!(Markup["a1/"]: "# " => Hashtag, Space(0));
         t!(Markup: "~"         => Tilde);
         t!(Markup[" "]: r"\"   => Backslash);
     }
@@ -666,7 +669,7 @@ mod tests {
         for &(s, t) in &keywords {
             t!(Markup[" "]: format!("#{}", s) => t);
             t!(Markup[" "]: format!("#{0}#{0}", s) => t, t);
-            t!(Markup[" /"]: format!("# {}", s) => Token::Invalid("#"), Space(0), Text(s));
+            t!(Markup[" /"]: format!("# {}", s) => Token::Hashtag, Space(0), Text(s));
         }
 
         for &(s, t) in &keywords {

src/pretty.rs

@@ -141,7 +141,7 @@ impl PrettyWithMap for Node {
 impl PrettyWithMap for HeadingNode {
     fn pretty_with_map(&self, p: &mut Printer, map: Option<&NodeMap>) {
         for _ in 0 .. self.level {
-            p.push('=');
+            p.push('#');
         }
         self.contents.pretty_with_map(p, map);
     }
@@ -666,7 +666,7 @@ mod tests {
         roundtrip("hi");
 
         // Heading.
-        roundtrip("= *Ok*");
+        roundtrip("# *Ok*");
 
         // Raw.
         roundtrip("``");

src/syntax/token.rs

@@ -20,8 +20,8 @@ pub enum Token<'s> {
     Star,
     /// An underscore: `_`.
     Underscore,
-    /// A single equals sign: `=`.
-    Eq,
+    /// A single hashtag: `#`.
+    Hashtag,
     /// A tilde: `~`.
     Tilde,
     /// A backslash followed by nothing or whitespace: `\`.
@@ -38,6 +38,8 @@ pub enum Token<'s> {
     Hyph,
     /// A slash: `/`.
     Slash,
+    /// A single equals sign: `=`.
+    Eq,
     /// Two equals signs: `==`.
     EqEq,
     /// An exclamation mark followed by an equals sign: `!=`.
@@ -200,6 +202,7 @@ impl<'s> Token<'s> {
             Self::RightParen => "closing paren",
             Self::Star => "star",
             Self::Underscore => "underscore",
+            Self::Hashtag => "hashtag",
             Self::Tilde => "tilde",
             Self::Backslash => "backslash",
             Self::Comma => "comma",

tests/typ/code/call-invalid.typ

@@ -1,9 +1,5 @@
 // Test invalid function calls.
 
----
-// Error: 1-2 unexpected invalid token
-#
-
 ---
 // Error: 7-8 expected expression, found colon
 #args(:)

tests/typ/code/importable/chap1.typ

@@ -2,7 +2,7 @@
 
 #let name = "Klaus"
 
-== Chapter 1
+## Chapter 1
 #name stood in a field of wheat. There was nothing of particular interest about
 the field #name just casually surveyed for any paths on which the corn would not
 totally ruin his semi-new outdorsy jacket but then again, most of us spend

tests/typ/code/importable/chap2.typ

@@ -2,7 +2,7 @@
 
 #let name = "Klaus"
 
-== Chapter 2
+## Chapter 2
 Their motivations, however, were pretty descript, so to speak. #name had not yet
 conceptualized their consequences, but that should change pretty quickly. #name
 approached the center of the field and picked up a 4-foot long disk made from

tests/typ/code/include.typ

@@ -1,7 +1,7 @@
 // Test include statements.
 
 ---
-= Document
+# Document
 
 // Include a file
 #include "importable/chap1.typ"

tests/typ/full/coma.typ

@@ -30,7 +30,7 @@
 // the parentheses.
 #align(center)[
     // Markdown-like syntax for headings.
-    ==== 3. Übungsblatt Computerorientierte Mathematik II #v(4mm)
+    #### 3. Übungsblatt Computerorientierte Mathematik II #v(4mm)
     *Abgabe: 03.05.2019* (bis 10:10 Uhr in MA 001) #v(4mm)
     *Alle Antworten sind zu beweisen.*
 ]

tests/typ/markup/heading.typ

@@ -4,44 +4,44 @@
 // Different number of hashtags.
 
 // Valid levels.
-=1
-===2
-======6
+# 1
+### 2
+###### 6
 
 // Too many hashtags.
 // Warning: 1-8 should not exceed depth 6
-=======7
+####### 7
 
 ---
 // Heading continuation over linebreak.
 
 // Code blocks continue heading.
-= A{
+# A{
     "B"
 }
 
 // Function call continues heading.
-= #rect[
+# #rect[
     A
 ] B
 
 // Without some kind of block, headings end at a line break.
-= A
+# A
 B
 
 ---
 // Heading vs. no heading.
 
 // Parsed as headings if at start of the context.
-/**/ = Ok
-{[== Ok]}
-#rect[=== Ok]
+/**/ # Ok
+{[## Ok]}
+#rect[### Ok]
 
 // Not at the start of the context.
-No = heading
+No # heading
 
 // Escaped.
-\= No heading
+\# No heading
 
 ---
 // Make small, but double heading.
@@ -49,4 +49,4 @@ No = heading
 
 // The new heading's argument list doesn't contain `level`.
 // Error: 1-11 unexpected argument
-=== Twice.
+### Twice.

tools/support/typst.tmLanguage.json

@@ -75,18 +75,17 @@
         {
           "name": "markup.heading.typst",
           "contentName": "entity.name.section.typst",
-          "begin": "^\\s*={1,6}",
+          "begin": "^\\s*#{1,6}\\s+",
           "end": "\n",
           "beginCaptures": { "0": { "name": "punctuation.definition.heading.typst" } },
           "patterns": [{ "include": "#markup" }]
         },
         {
           "name": "punctuation.definition.list.unnumbered.typst",
-          "match": "^\\s*-"
+          "match": "^\\s*-\\s+"
         },
         {
           "name": "punctuation.definition.list.numbered.typst",
-          "match": "^\\s*[0-9]*\\."
         },
         {
           "name": "string.other.math.block.typst",
@@ -111,6 +110,7 @@
           "begin": "`",
           "end": "`",
           "captures": { "0": { "name": "punctuation.definition.raw.typst" } }
+          "match": "^\\s*[0-9]*\\.\\s+"
         },
         {
           "name": "keyword.control.typst",