diff options
Diffstat (limited to 'parser/expr.go')
| -rw-r--r-- | parser/expr.go | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/parser/expr.go b/parser/expr.go index 18c97a5..d626e9e 100644 --- a/parser/expr.go +++ b/parser/expr.go @@ -85,7 +85,7 @@ func (p *Parser) ParseExpr(in Tokens) (out Tokens, err error) { if out, err = p.ParseLogical(out); err != nil { return out, err } - if l := len(out) - 1; out[l].Id == lang.Define || out[l].Id == lang.Assign { + if l := len(out) - 1; l >= 0 && (out[l].Id == lang.Define || out[l].Id == lang.Assign) { // Handle the assignment of a logical expression. s1 := p.subExprLen(out[:l]) head, err := p.ParseLogical(out[:l-s1]) @@ -139,7 +139,7 @@ func (p *Parser) ParseExprStr(s string) (tokens Tokens, err error) { // If the last token is not a logical operator then the function is idempotent. func (p *Parser) ParseLogical(in Tokens) (out Tokens, err error) { l := len(in) - 1 - if !in[l].Id.IsLogicalOp() { + if l < 0 || !in[l].Id.IsLogicalOp() { return in, nil } xp := strconv.Itoa(p.labelCount[p.scope]) |