1 files changed, 0 insertions, 150 deletions
diff --git a/vendor/honnef.co/go/tools/functions/functions.go b/vendor/honnef.co/go/tools/functions/functions.go
deleted file mode 100644
index c5fe2d7..0000000
--- a/vendor/honnef.co/go/tools/functions/functions.go
+++ /dev/null
@@ -1,150 +0,0 @@
-package functions
-
-import (
-	"go/types"
-	"sync"
-
-	"honnef.co/go/tools/callgraph"
-	"honnef.co/go/tools/callgraph/static"
-	"honnef.co/go/tools/ssa"
-	"honnef.co/go/tools/staticcheck/vrp"
-)
-
-var stdlibDescs = map[string]Description{
-	"errors.New": Description{Pure: true},
-
-	"fmt.Errorf":  Description{Pure: true},
-	"fmt.Sprintf": Description{Pure: true},
-	"fmt.Sprint":  Description{Pure: true},
-
-	"sort.Reverse": Description{Pure: true},
-
-	"strings.Map":            Description{Pure: true},
-	"strings.Repeat":         Description{Pure: true},
-	"strings.Replace":        Description{Pure: true},
-	"strings.Title":          Description{Pure: true},
-	"strings.ToLower":        Description{Pure: true},
-	"strings.ToLowerSpecial": Description{Pure: true},
-	"strings.ToTitle":        Description{Pure: true},
-	"strings.ToTitleSpecial": Description{Pure: true},
-	"strings.ToUpper":        Description{Pure: true},
-	"strings.ToUpperSpecial": Description{Pure: true},
-	"strings.Trim":           Description{Pure: true},
-	"strings.TrimFunc":       Description{Pure: true},
-	"strings.TrimLeft":       Description{Pure: true},
-	"strings.TrimLeftFunc":   Description{Pure: true},
-	"strings.TrimPrefix":     Description{Pure: true},
-	"strings.TrimRight":      Description{Pure: true},
-	"strings.TrimRightFunc":  Description{Pure: true},
-	"strings.TrimSpace":      Description{Pure: true},
-	"strings.TrimSuffix":     Description{Pure: true},
-
-	"(*net/http.Request).WithContext": Description{Pure: true},
-
-	"math/rand.Read":         Description{NilError: true},
-	"(*math/rand.Rand).Read": Description{NilError: true},
-}
-
-type Description struct {
-	// The function is known to be pure
-	Pure bool
-	// The function is known to be a stub
-	Stub bool
-	// The function is known to never return (panics notwithstanding)
-	Infinite bool
-	// Variable ranges
-	Ranges vrp.Ranges
-	Loops  []Loop
-	// Function returns an error as its last argument, but it is
-	// always nil
-	NilError            bool
-	ConcreteReturnTypes []*types.Tuple
-}
-
-type descriptionEntry struct {
-	ready  chan struct{}
-	result Description
-}
-
-type Descriptions struct {
-	CallGraph *callgraph.Graph
-	mu        sync.Mutex
-	cache     map[*ssa.Function]*descriptionEntry
-}
-
-func NewDescriptions(prog *ssa.Program) *Descriptions {
-	return &Descriptions{
-		CallGraph: static.CallGraph(prog),
-		cache:     map[*ssa.Function]*descriptionEntry{},
-	}
-}
-
-func (d *Descriptions) Get(fn *ssa.Function) Description {
-	d.mu.Lock()
-	fd := d.cache[fn]
-	if fd == nil {
-		fd = &descriptionEntry{
-			ready: make(chan struct{}),
-		}
-		d.cache[fn] = fd
-		d.mu.Unlock()
-
-		{
-			fd.result = stdlibDescs[fn.RelString(nil)]
-			fd.result.Pure = fd.result.Pure || d.IsPure(fn)
-			fd.result.Stub = fd.result.Stub || d.IsStub(fn)
-			fd.result.Infinite = fd.result.Infinite || !terminates(fn)
-			fd.result.Ranges = vrp.BuildGraph(fn).Solve()
-			fd.result.Loops = findLoops(fn)
-			fd.result.NilError = fd.result.NilError || IsNilError(fn)
-			fd.result.ConcreteReturnTypes = concreteReturnTypes(fn)
-		}
-
-		close(fd.ready)
-	} else {
-		d.mu.Unlock()
-		<-fd.ready
-	}
-	return fd.result
-}
-
-func IsNilError(fn *ssa.Function) bool {
-	// TODO(dh): This is very simplistic, as we only look for constant
-	// nil returns. A more advanced approach would work transitively.
-	// An even more advanced approach would be context-aware and
-	// determine nil errors based on inputs (e.g. io.WriteString to a
-	// bytes.Buffer will always return nil, but an io.WriteString to
-	// an os.File might not). Similarly, an os.File opened for reading
-	// won't error on Close, but other files will.
-	res := fn.Signature.Results()
-	if res.Len() == 0 {
-		return false
-	}
-	last := res.At(res.Len() - 1)
-	if types.TypeString(last.Type(), nil) != "error" {
-		return false
-	}
-
-	if fn.Blocks == nil {
-		return false
-	}
-	for _, block := range fn.Blocks {
-		if len(block.Instrs) == 0 {
-			continue
-		}
-		ins := block.Instrs[len(block.Instrs)-1]
-		ret, ok := ins.(*ssa.Return)
-		if !ok {
-			continue
-		}
-		v := ret.Results[len(ret.Results)-1]
-		c, ok := v.(*ssa.Const)
-		if !ok {
-			return false
-		}
-		if !c.IsNil() {
-			return false
-		}
-	}
-	return true
-}