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// Copyright 2018 Google LLC
//
// 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 checker
import (
"sort"
"github.com/google/cel-go/common/ast"
"github.com/google/cel-go/common/debug"
)
type semanticAdorner struct {
checked *ast.AST
}
var _ debug.Adorner = &semanticAdorner{}
func (a *semanticAdorner) GetMetadata(elem any) string {
result := ""
e, isExpr := elem.(ast.Expr)
if !isExpr {
return result
}
t := a.checked.TypeMap()[e.ID()]
if t != nil {
result += "~"
result += FormatCELType(t)
}
switch e.Kind() {
case ast.IdentKind,
ast.CallKind,
ast.ListKind,
ast.StructKind,
ast.SelectKind:
if ref, found := a.checked.ReferenceMap()[e.ID()]; found {
if len(ref.OverloadIDs) == 0 {
result += "^" + ref.Name
} else {
sort.Strings(ref.OverloadIDs)
for i, overload := range ref.OverloadIDs {
if i == 0 {
result += "^"
} else {
result += "|"
}
result += overload
}
}
}
}
return result
}
// Print returns a string representation of the Expr message,
// annotated with types from the CheckedExpr. The Expr must
// be a sub-expression embedded in the CheckedExpr.
func Print(e ast.Expr, checked *ast.AST) string {
a := &semanticAdorner{checked: checked}
return debug.ToAdornedDebugString(e, a)
}
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