From 9217dda7b2c6f0fcb927e977c9396ce316fda89f Mon Sep 17 00:00:00 2001
From: Anton Medvedev <anton@medv.io>
Date: Mon, 2 Mar 2020 13:47:15 +0300
Subject: [PATCH] Fix exponent parse error

---
 parser/parser.go      | 2 +-
 parser/parser_test.go | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/parser/parser.go b/parser/parser.go
index cb31f7049..a97ec8ddc 100644
--- a/parser/parser.go
+++ b/parser/parser.go
@@ -282,7 +282,7 @@ func (p *parser) parsePrimaryExpression() Node {
 	case Number:
 		p.next()
 		value := strings.Replace(token.Value, "_", "", -1)
-		if strings.Contains(value, ".") {
+		if strings.ContainsAny(value, ".eE") {
 			number, err := strconv.ParseFloat(value, 64)
 			if err != nil {
 				p.error("invalid float literal: %v", err)
diff --git a/parser/parser_test.go b/parser/parser_test.go
index 964d7c3cf..5b37ad7b1 100644
--- a/parser/parser_test.go
+++ b/parser/parser_test.go
@@ -39,6 +39,10 @@ func TestParse(t *testing.T) {
 			"2.5",
 			&ast.FloatNode{Value: 2.5},
 		},
+		{
+			"1e9",
+			&ast.FloatNode{Value: 1e9},
+		},
 		{
 			"true",
 			&ast.BoolNode{Value: true},