Elara6331/salix
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Define the behavior of nil better

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Elara 2024-06-06 19:12:59 -07:00
parent 849295bb5f
commit c5470a45dd
1 changed files with 4 additions and 0 deletions
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4
expr.go
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@ -54,6 +54,10 @@ func (t *Template) performOp(a, b reflect.Value, op ast.Operator) (any, error) {
default:
return nil, ast.PosError(op, "the in operator can only be used on strings, arrays, and slices (got %s and %s)", a.Type(), b.Type())
}
} else if !a.IsValid() && !b.IsValid() {
return true, nil
} else if !a.IsValid() {
return nil, ast.PosError(op, "nil must be on the right side of an expression")
} else if !b.IsValid() {
if op.Value != "==" && op.Value != "!=" {
return nil, ast.PosError(op, "invalid operator for nil value (expected == or !=, got %s)", op.Value)