.gitignore added

[dotfiles/.git] / .config / coc / extensions / coc-go-data / tools / pkg / mod / honnef.co / go / tools@v0.1.1 / go / ir / irutil / stub.go

diff --git a/.config/coc/extensions/coc-go-data/tools/pkg/mod/honnef.co/go/tools@v0.1.1/go/ir/irutil/stub.go b/.config/coc/extensions/coc-go-data/tools/pkg/mod/honnef.co/go/tools@v0.1.1/go/ir/irutil/stub.go
new file mode 100644 (file)
index 0000000..4311c7d
--- /dev/null
+++ b/.config/coc/extensions/coc-go-data/tools/pkg/mod/honnef.co/go/tools@v0.1.1/go/ir/irutil/stub.go
@@ -0,0 +1,32 @@
+package irutil
+
+import (
+       "honnef.co/go/tools/go/ir"
+)
+
+// IsStub reports whether a function is a stub. A function is
+// considered a stub if it has no instructions or if all it does is
+// return a constant value.
+func IsStub(fn *ir.Function) bool {
+       for _, b := range fn.Blocks {
+               for _, instr := range b.Instrs {
+                       switch instr.(type) {
+                       case *ir.Const:
+                               // const naturally has no side-effects
+                       case *ir.Panic:
+                               // panic is a stub if it only uses constants
+                       case *ir.Return:
+                               // return is a stub if it only uses constants
+                       case *ir.DebugRef:
+                       case *ir.Jump:
+                               // if there are no disallowed instructions, then we're
+                               // only jumping to the exit block (or possibly
+                               // somewhere else that's stubby?)
+                       default:
+                               // all other instructions are assumed to do actual work
+                               return false
+                       }
+               }
+       }
+       return true
+}