Grammar: infix operation should be allowed in else statement

[vgramer]

Actual Behavior

Infix operation is not allowed in the else statement

floor(x) = round(x) {
	round(x) == x
} else = ceil(x) - 1 {
	true
}

source: anderseknert/opal/blob/master/lib/math.rego

parsing is failing with message <ref arg> or '{' expected, got '-'

Expected Behavior

it should pass

How To Reproduce

open file in idea

Environment

• OS: all

• OPA version: all

• IDE full name and version: all

• plugin version: all

Additional context