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72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package checker
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import (
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"github.com/google/cel-go/common/debug"
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exprpb "google.golang.org/genproto/googleapis/api/expr/v1alpha1"
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)
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type semanticAdorner struct {
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checks *exprpb.CheckedExpr
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}
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var _ debug.Adorner = &semanticAdorner{}
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func (a *semanticAdorner) GetMetadata(elem interface{}) string {
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result := ""
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e, isExpr := elem.(*exprpb.Expr)
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if !isExpr {
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return result
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}
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t := a.checks.TypeMap[e.Id]
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if t != nil {
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result += "~"
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result += FormatCheckedType(t)
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}
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switch e.ExprKind.(type) {
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case *exprpb.Expr_IdentExpr,
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*exprpb.Expr_CallExpr,
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*exprpb.Expr_StructExpr,
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*exprpb.Expr_SelectExpr:
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if ref, found := a.checks.ReferenceMap[e.Id]; found {
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if len(ref.GetOverloadId()) == 0 {
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result += "^" + ref.Name
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} else {
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for i, overload := range ref.OverloadId {
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if i == 0 {
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result += "^"
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} else {
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result += "|"
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}
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result += overload
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}
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}
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}
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}
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return result
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}
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// Print returns a string representation of the Expr message,
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// annotated with types from the CheckedExpr. The Expr must
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// be a sub-expression embedded in the CheckedExpr.
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func Print(e *exprpb.Expr, checks *exprpb.CheckedExpr) string {
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a := &semanticAdorner{checks: checks}
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return debug.ToAdornedDebugString(e, a)
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}
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