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// Test let bindings.
---
// Automatically initialized with none.
#let x
#test(x, none)
// Manually initialized with one.
#let z = 1
#test(z, 1)
// Syntax sugar for function definitions.
#let fill = conifer
#let rect(body) = rect(width: 2cm, fill: fill, pad(5pt, body))
#rect[Hi!]
---
// Termination.
// Terminated by line break.
#let v1 = 1
One
// Terminated by semicolon.
#let v2 = 2; Two
// Terminated by semicolon and line break.
#let v3 = 3;
Three
#test(v1, 1)
#test(v2, 2)
#test(v3, 3)
---
// Error: 5 expected identifier
#let
// Error: 5 expected identifier
{let}
// Error: 6-9 expected identifier, found string
#let "v"
// Error: 7 expected semicolon or line break
#let v 1
// Error: 9 expected expression
#let v =
// Error: 6-9 expected identifier, found string
#let "v" = 1
// Terminated because expression ends.
// Error: 12 expected semicolon or line break
#let v4 = 4 Four
// Terminated by semicolon even though we are in a paren group.
// Error: 19 expected expression
// Error: 19 expected closing paren
#let v5 = (1, 2 + ; Five
---
// Error: 13 expected body
#let func(x)
// Error: 15 expected expression
#let func(x) =
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