debug.go

Documentation: cuelang.org/go/tools/trim

     1  // Copyright 2021 CUE Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package trim
    16  
    17  import (
    18  	"fmt"
    19  	"strings"
    20  
    21  	"cuelang.org/go/internal/core/adt"
    22  )
    23  
    24  func (t *trimmer) trace(v *adt.Vertex) (*trimmer, *adt.Vertex) {
    25  	if t.debug {
    26  		t.indent++
    27  		fmt.Fprintf(t.w, "%s%s {\n",
    28  			strings.Repeat("..", t.indent),
    29  			v.Label.SelectorString(t.ctx))
    30  	}
    31  	return t, v
    32  }
    33  
    34  func un(t *trimmer, v *adt.Vertex) {
    35  	if !t.debug {
    36  		return
    37  	}
    38  	fmt.Fprintf(t.w, "%s}\n",
    39  		strings.Repeat("..", t.indent))
    40  	t.indent--
    41  }
    42  
    43  func (t *trimmer) logf(format string, args ...interface{}) {
    44  	if !t.debug {
    45  		return
    46  	}
    47  	fmt.Fprint(t.w, strings.Repeat("..", t.indent+1))
    48  	fmt.Fprintf(t.w, format, args...)
    49  	fmt.Fprintln(t.w)
    50  }
    51
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