chore: clean up code and add copyright header (#29)

arithmetic.go

@@ -1,3 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package expr
 
 import (
@@ -6,7 +19,7 @@ import (
 	"go/token"
 	"math"
 
-	"github.com/muktihari/expr/conv"
+	"github.com/muktihari/expr/internal/conv"
 )
 
 func arithmetic(v, vx, vy *Visitor, binaryExpr *ast.BinaryExpr) {

arithmetic_test.go

@@ -1,3 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package expr
 
 import (

bind/bind.go

@@ -1,4 +1,16 @@
-// bind is an helper to bind variable values into the string expression.
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package bind
 
 import (

bind/bind_benchmark_test.go

@@ -1,3 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package bind_test
 
 import (

bind/bind_test.go

@@ -1,3 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package bind
 
 import (

bind/docs.go

@@ -0,0 +1,15 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package bind is an helper to bind variable values into the string expression.
+package bind

bitwise.go

@@ -1,11 +1,24 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package expr
 
 import (
 	"fmt"
 	"go/ast"
 	"go/token"
 
-	"github.com/muktihari/expr/conv"
+	"github.com/muktihari/expr/internal/conv"
 )
 
 func bitwise(v, vx, vy *Visitor, binaryExpr *ast.BinaryExpr) {

bitwise_test.go

@@ -1,3 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package expr
 
 import (

comparison.go

@@ -1,11 +1,24 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package expr
 
 import (
 	"fmt"
 	"go/ast"
 	"go/token"
 
-	"github.com/muktihari/expr/conv"
+	"github.com/muktihari/expr/internal/conv"
 )
 
 func comparison(v, vx, vy *Visitor, binaryExpr *ast.BinaryExpr) {

comparison_test.go

@@ -1,3 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package expr
 
 import (

docs.go

@@ -0,0 +1,15 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package expr is the core of this library, it contains implementation to parse and evaluate mathematical and boolean expression.
+package expr

errors.go

@@ -1,3 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package expr
 
 import (

exp/docs.go

@@ -0,0 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package exp contains experimental projects. Packages under this package are not guaranteed to be stable
+// nor should it be maintained its backward compatibility.
+package exp

explain/README.md → exp/explain/README.md

@@ -20,4 +20,4 @@ Explain is a standalone package aimed to explain step by step operation in expr.
     // explanation:
     // 1 + 2       -> 3
     // (1 + 2) + 3 -> (3 + 3) -> 6
-```
+```

exp/explain/docs.go

@@ -0,0 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package explain is a standalone package aimed to explain step by step operation in expr.
+// This package is EXPERIMENTAL, and it's not guaranteed to be stable nor should it be maintained its backward compatibility.
+package explain

explain/explain.go → exp/explain/explain.go

@@ -1,4 +1,16 @@
-// explain is a standalone package aimed to explain step by step operation in expr.
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package explain
 
 import (

explain/explain_test.go → exp/explain/explain_test.go

@@ -1,3 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package explain_test
 
 import (
@@ -6,7 +19,7 @@ import (
 
 	"github.com/google/go-cmp/cmp"
 	"github.com/muktihari/expr"
-	"github.com/muktihari/expr/explain"
+	"github.com/muktihari/expr/exp/explain"
 )
 
 func TestExplain(t *testing.T) {

explain/visitor.go → exp/explain/visitor.go

@@ -1,11 +1,24 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package explain
 
 import (
 	"fmt"
 	"go/ast"
 
 	"github.com/muktihari/expr"
-	"github.com/muktihari/expr/conv"
+	"github.com/muktihari/expr/internal/conv"
 )
 
 type exprType int

explain/visitor_test.go → exp/explain/visitor_test.go

@@ -1,3 +1,16 @@
+// Copyright 2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package explain
 
 import (

expr.go

@@ -1,3 +1,16 @@
+// Copyright 2020-2023 The Expr Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 package expr
 
 import (