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cmd/guru: report 'whicherrs' in modes of 'what' query

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A 'what' query reports which other query modes are applicable to the
selected syntax.  A 'whicherrs' query is similar to a 'pointsto'
query, so we enable it using the same criteria.

Fixes issue golang/go#18938

Change-Id: Iae062e0c933c7764bc335488adabf816d63ac837
Reviewed-on: https://go-review.googlesource.com/37349
Reviewed-by: Dominik Honnef <dominik@honnef.co>
This commit is contained in:
Alan Donovan 2017-02-24 16:57:05 -05:00
parent a663d825ff
commit 3537037b0b
1 changed files with 7 additions and 3 deletions
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10
cmd/guru/what.go
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@ -74,7 +74,7 @@ func what(q *Query) error {
}
}
// For pointsto, we approximate findInterestingNode.
// For pointsto and whicherrs, we approximate findInterestingNode.
if _, ok := enable["pointsto"]; !ok {
switch n.(type) {
case ast.Stmt,
@ -84,10 +84,14 @@ func what(q *Query) error {
*ast.InterfaceType,
*ast.MapType,
*ast.ChanType:
enable["pointsto"] = false // not an expr
// not an expression
enable["pointsto"] = false
enable["whicherrs"] = false
case ast.Expr, ast.Decl, *ast.ValueSpec:
enable["pointsto"] = true // an expr, maybe
// an expression, maybe
enable["pointsto"] = true
enable["whicherrs"] = true
default:
// Comment, Field, KeyValueExpr, etc: ascend.