Require parentheses in all function-like sub/superscripts

crates/typst-syntax/src/parser.rs

@@ -384,10 +384,10 @@ fn math_expr_prec(p: &mut Parser, min_prec: usize, stop: SyntaxKind) {
 fn math_op(kind: SyntaxKind) -> Option<(SyntaxKind, SyntaxKind, ast::Assoc, usize)> {
     match kind {
         SyntaxKind::Underscore => {
-            Some((SyntaxKind::MathAttach, SyntaxKind::Hat, ast::Assoc::Right, 2))
+            Some((SyntaxKind::MathAttach, SyntaxKind::Hat, ast::Assoc::Right, 3))
         }
         SyntaxKind::Hat => {
-            Some((SyntaxKind::MathAttach, SyntaxKind::Underscore, ast::Assoc::Right, 2))
+            Some((SyntaxKind::MathAttach, SyntaxKind::Underscore, ast::Assoc::Right, 3))
         }
         SyntaxKind::Slash => {
             Some((SyntaxKind::MathFrac, SyntaxKind::End, ast::Assoc::Left, 1))

tests/suite/math/accent.typ

@@ -34,7 +34,7 @@ $tilde(sum), tilde(sum, size: #50%), accent(H, hat, size: #200%)$
 
 --- math-accent-sized-script ---
 // Test accent size in script size.
-$tilde(U, size: #1.1em), x^tilde(U, size: #1.1em), sscript(tilde(U, size: #1.1em))$
+$tilde(U, size: #1.1em), x^(tilde(U, size: #1.1em)), sscript(tilde(U, size: #1.1em))$
 
 --- math-accent-dotless ---
 // Test dotless glyph variants.

tests/suite/math/attach.typ

@@ -42,9 +42,23 @@ attach(a, tl: u, t: t, tr: v, bl: x, b: b, br: y)
 $
 
 --- math-attach-followed-by-func-call ---
-// Test function call after subscript.
+// Test function call after subscripts and superscripts.
-$pi_1(Y), a_f(x), a^zeta (x), a^abs(b)_sqrt(c) \
+#set page(width: auto)
- a^subset.eq (x), a_(zeta(x)), pi_(1(Y)), a^(abs(b))_(sqrt(c))$
+$a_1(x), a^10(x), a_f(x), a^zeta(x), a_"text"(x),
+ a_∂(x), a^cos(x), a_abs(x), a^root(2, x), a_subset.eq(x) \
+ a_(1(x)), a^(10(x)), a_(f(x)), a^(zeta(x)), a_("text"(x)),
+ a_(∂(x)), a^(cos(x)), a_(abs(x)), a^(root(2, x)), a_(subset.eq(x))$
+
+--- math-attach-followed-by-func-call-complex ---
+// Test function call with named arguments after scripts.
+#let cross = $c$
+$a_cancel(x, cross: #true)$
+
+--- math-attach-followed-by-func-call-error ---
+// Error: 14-19 unknown variable: cross
+// Hint: 14-19 if you meant to display multiple letters as is, try adding spaces between each letter: `c r o s s`
+// Hint: 14-19 or if you meant to display this as text, try placing it in quotes: `"cross"`
+$a_cancel(x, cross: #true)$
 
 --- math-attach-nested ---
 // Test associativity and scaling.

tests/suite/text/raw.typ

@@ -215,7 +215,7 @@ box[]
 hello.world
 hello.world()
 hello.my.world()
-f_zeta(x), f_zeta(x)/1
+f_(zeta(x)), f_(zeta(x))/1
 emph(hello.my.world())
 emph(hello.my().world)
 emph(hello.my().world())