Added some tests and fixed an issue with the optional quantifiers

libvore/parser_regexp.go

@@ -275,10 +275,14 @@ func parse_regexp_quantifier(regexp_token *Token, regexp string, index int) (*As
 		exp = nil
 		end_idx = index
 	}
-	exp.fewest = end_idx < len(regexp) && regexp[end_idx] == '?'
-	if exp.fewest {
-		end_idx += 1
+
+	if exp != nil {
+		exp.fewest = end_idx < len(regexp) && regexp[end_idx] == '?'
+		if exp.fewest {
+			end_idx += 1
+		}
 	}
+
 	return exp, end_idx, nil
 }
 

libvore/vore_test.go

@@ -515,3 +515,59 @@ func TestRegexp12(t *testing.T) {
 		{3, `aa--a-a`, None[string](), []TestVar{}},
 	})
 }
+
+func TestRegexp13(t *testing.T) {
+	vore, err := Compile("find all @/test/")
+	checkNoError(t, err)
+	results := vore.Run("this is a test")
+	matches(t, results, []TestMatch{
+		{10, "test", None[string](), []TestVar{}},
+	})
+}
+
+func TestRegexp14(t *testing.T) {
+	vore, err := Compile("find all @/a|b/")
+	checkNoError(t, err)
+	results := vore.Run("abc")
+	matches(t, results, []TestMatch{
+		{0, "a", None[string](), []TestVar{}},
+		{1, "b", None[string](), []TestVar{}},
+	})
+}
+
+func TestRegexp15(t *testing.T) {
+	vore, err := Compile("find all @/^test/")
+	checkNoError(t, err)
+	results := vore.Run("test a test")
+	matches(t, results, []TestMatch{
+		{0, "test", None[string](), []TestVar{}},
+	})
+}
+
+func TestRegexp16(t *testing.T) {
+	vore, err := Compile("find all @/test$/")
+	checkNoError(t, err)
+	results := vore.Run("test a test")
+	matches(t, results, []TestMatch{
+		{7, "test", None[string](), []TestVar{}},
+	})
+}
+
+func TestRegexp17(t *testing.T) {
+	vore, err := Compile("find all @/[^abc]*/")
+	checkNoError(t, err)
+	results := vore.Run("I really hate the abc's")
+	matches(t, results, []TestMatch{
+		{0, "I re", None[string](), []TestVar{}},
+		{5, "lly h", None[string](), []TestVar{}},
+		{11, "te the ", None[string](), []TestVar{}},
+		{21, "'s", None[string](), []TestVar{}},
+	})
+}
+
+func TestRegexp18(t *testing.T) {
+	vore, err := Compile("find all @/[]/")
+	checkNoError(t, err)
+	results := vore.Run("This is not a match")
+	matches(t, results, []TestMatch{})
+}