// Test delimiter matching and scaling.

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// Test automatic matching.
#set page(width:122pt)
$ (a) + {b/2} + abs(a)/2 + (b) $
$f(x/2) < zeta(c^2 + abs(a + b/2))$

---
// Test unmatched.
$[1,2[ = [1,2) != zeta\(x/2\) $

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// Test manual matching.
$ [|a/b|] != lr(|]a/b|]) != [a/b) $
$ lr(| ]1,2\[ + 1/2|) $

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// Test fence confusion.
$ |x + |y| + z/a| \
  lr(|x + |y| + z/a|) $

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// Test that symbols aren't matched automatically.
$ bracket.l a/b bracket.r
  = lr(bracket.l a/b bracket.r) $

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// Test half LRs.
$ lr(a/b\]) = a = lr(\{a/b) $

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// Test manual scaling.
$ lr(]sum_(x=1)^n x], size: #70%)
  < lr((1, 2), size: #200%) $

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// Test predefined delimiter pairings.
$floor(x/2), ceil(x/2), abs(x), norm(x)$

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// Test colored delimiters
$ lr(
    text("(", fill: #green) a/b
    text(")", fill: #blue)
  ) $

---
// Test middle functions
$ { x mid(|) sum_(i=1)^oo phi_i (x) < 1 } \
  { integral |x| dif x
      mid(bar.v.double)
    floor(hat(A) mid(|) { x mid(|) y } mid(|) A) } $

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// Test ignoring weak spacing immediately after the opening
// and immediately before the closing.

$ [#h(1em, weak: true)A(dif x, f(x) dif x)sum#h(1em, weak: true)] $