xcontext.go

Documentation: oss.terrastruct.com/util-go/xcontext

     1  // Package xcontext implements indispensable context helpers.
     2  package xcontext
     3  
     4  import (
     5  	"context"
     6  	"time"
     7  )
     8  
     9  // WithoutCancel returns a context derived from ctx that may
    10  // never be cancelled.
    11  func WithoutCancel(ctx context.Context) context.Context {
    12  	return withoutCancel{ctx: ctx}
    13  }
    14  
    15  type withoutCancel struct {
    16  	ctx context.Context
    17  }
    18  
    19  func (c withoutCancel) Deadline() (time.Time, bool) {
    20  	return time.Time{}, false
    21  }
    22  
    23  func (c withoutCancel) Done() <-chan struct{} {
    24  	return nil
    25  }
    26  
    27  func (c withoutCancel) Err() error {
    28  	return nil
    29  }
    30  
    31  func (c withoutCancel) Value(key interface{}) interface{} {
    32  	return c.ctx.Value(key)
    33  }
    34  
    35  // WithoutValues creates a new context derived from ctx that does not inherit its values
    36  // but does pass on cancellation.
    37  func WithoutValues(ctx context.Context) context.Context {
    38  	return withoutValues{ctx: ctx}
    39  }
    40  
    41  type withoutValues struct {
    42  	ctx context.Context
    43  }
    44  
    45  func (c withoutValues) Deadline() (time.Time, bool) {
    46  	return c.ctx.Deadline()
    47  }
    48  
    49  func (c withoutValues) Done() <-chan struct{} {
    50  	return c.ctx.Done()
    51  }
    52  
    53  func (c withoutValues) Err() error {
    54  	return c.ctx.Err()
    55  }
    56  
    57  func (c withoutValues) Value(key interface{}) interface{} {
    58  	return nil
    59  }
    60
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