-- Negative literals immediately after a binary operator. The lexer eats
-- `-0.05` as a single Number token, but a negative literal is itself a valid
-- second operand to a binary op, so `<r -0.05` parses cleanly as
-- `LessThan(r, -0.05)`. Same holds for negative literals in prefix-binary
-- arg position (`+a -3`) and in call arg position (`mod n -2`).
below x:n>n;<x -0.05{1}{0}
shift a:n>n;+a -3
modn n:n>n;mod n -2
-- Edge shapes: `-0` literal, list literal with neg middle, explicit `- 0 0.05`
-- binary subtract workaround, and `+a -b` (negated ident ref, not a literal).
zero>n;-0
mid>n;l=[1 -2 3];hd tl l
sub>n;- 0 0.05
addref a:n b:n>n;+a -b
-- run: below -0.1
-- out: 1
-- run: below 0.1
-- out: 0
-- run: below -0.05
-- out: 0
-- run: shift 10
-- out: 7
-- run: shift -5
-- out: -8
-- run: modn 7
-- out: 1
-- run: modn 10
-- out: 0
-- run: zero
-- out: 0
-- run: mid
-- out: -2
-- run: sub
-- out: -0.05
-- run: addref 10 3
-- out: 7
-- run: addref -5 3
-- out: -8