Denis Isaev 7705f82591 Update megacheck to the latest version
Also do following improvements:
  - show proper sublinter name for megacheck sublinters
  - refactor and make more simple and robust megacheck
  merging/optimizing
  - improve handling of unknown linter names in //nolint directives
  - minimize diff of our megacheck version from the upstream,
  https://github.com/golang/go/issues/29612 blocks usage of the upstream
  version
  - support the new `stylecheck` linter
  - improve tests coverage for megacheck and nolint related cases
  - update and use upstream versions of unparam and interfacer instead of forked
  ones
  - don't use golangci/tools repo anymore
  - fix newly found issues after updating linters

Also should be noted that megacheck works much faster and consumes less
memory in the newest release, therefore golangci-lint works noticeably
faster and consumes less memory for large repos.

Relates: #314
2019-01-08 21:16:15 +03:00

74 lines
1.7 KiB
Go

package vrp
import (
"fmt"
"github.com/golangci/go-tools/ssa"
)
type ChannelInterval struct {
Size IntInterval
}
func (c ChannelInterval) Union(other Range) Range {
i, ok := other.(ChannelInterval)
if !ok {
i = ChannelInterval{EmptyIntInterval}
}
if c.Size.Empty() || !c.Size.IsKnown() {
return i
}
if i.Size.Empty() || !i.Size.IsKnown() {
return c
}
return ChannelInterval{
Size: c.Size.Union(i.Size).(IntInterval),
}
}
func (c ChannelInterval) String() string {
return c.Size.String()
}
func (c ChannelInterval) IsKnown() bool {
return c.Size.IsKnown()
}
type MakeChannelConstraint struct {
aConstraint
Buffer ssa.Value
}
type ChannelChangeTypeConstraint struct {
aConstraint
X ssa.Value
}
func NewMakeChannelConstraint(buffer, y ssa.Value) Constraint {
return &MakeChannelConstraint{NewConstraint(y), buffer}
}
func NewChannelChangeTypeConstraint(x, y ssa.Value) Constraint {
return &ChannelChangeTypeConstraint{NewConstraint(y), x}
}
func (c *MakeChannelConstraint) Operands() []ssa.Value { return []ssa.Value{c.Buffer} }
func (c *ChannelChangeTypeConstraint) Operands() []ssa.Value { return []ssa.Value{c.X} }
func (c *MakeChannelConstraint) String() string {
return fmt.Sprintf("%s = make(chan, %s)", c.Y().Name(), c.Buffer.Name())
}
func (c *ChannelChangeTypeConstraint) String() string {
return fmt.Sprintf("%s = changetype(%s)", c.Y().Name(), c.X.Name())
}
func (c *MakeChannelConstraint) Eval(g *Graph) Range {
i, ok := g.Range(c.Buffer).(IntInterval)
if !ok {
return ChannelInterval{NewIntInterval(NewZ(0), PInfinity)}
}
if i.Lower.Sign() == -1 {
i.Lower = NewZ(0)
}
return ChannelInterval{i}
}
func (c *ChannelChangeTypeConstraint) Eval(g *Graph) Range { return g.Range(c.X) }