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go/types: fix errors in recording type information

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In my previous change, I didn't use the correct functions for continuing
to record type informations after errors. Change to using the correct
functions, and add a comment to clarify in expr.go.

Updates #22467

Change-Id: I66ebb636ceb2b994db652343430f0551db0050c3
Reviewed-on: https://go-review.googlesource.com/128835
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Rebecca Stambler 2018-08-09 12:34:19 -04:00 committed by Alan Donovan
parent 28cee7075e
commit 79bf7955dc
4 changed files with 6 additions and 6 deletions
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4
src/go/types/api_test.go
View File

@ -42,7 +42,7 @@ func mustTypecheck(t *testing.T, path, source string, info *Info) string {
return pkg.Name()
}
func maybeTypecheck(t *testing.T, path, source string, info *Info) string {
func mayTypecheck(t *testing.T, path, source string, info *Info) string {
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, path, source, 0)
if f == nil { // ignore errors unless f is nil
@ -265,7 +265,7 @@ func TestTypesInfo(t *testing.T) {
for _, test := range tests {
info := Info{Types: make(map[ast.Expr]TypeAndValue)}
name := maybeTypecheck(t, "TypesInfo", test.src, &info)
name := mayTypecheck(t, "TypesInfo", test.src, &info)
// look for expression type
var typ Type

2
src/go/types/assignments.go
View File

@ -310,7 +310,7 @@ func (check *Checker) shortVarDecl(pos token.Pos, lhs, rhs []ast.Expr) {
check.recordDef(ident, obj)
}
} else {
check.expr(&operand{}, lhs)
check.useLHS(lhs)
check.errorf(lhs.Pos(), "cannot declare %s", lhs)
}
if obj == nil {

4
src/go/types/call.go
View File

@ -34,9 +34,7 @@ func (check *Checker) call(x *operand, e *ast.CallExpr) exprKind {
check.conversion(x, T)
}
default:
for _, arg := range e.Args {
check.expr(&operand{}, arg)
}
check.use(e.Args...)
check.errorf(e.Args[n-1].Pos(), "too many arguments in conversion to %s", T)
}
x.expr = e

2
src/go/types/expr.go
View File

@ -1094,6 +1094,8 @@ func (check *Checker) exprInternal(x *operand, e ast.Expr, hint Type) exprKind {
continue
}
key, _ := kv.Key.(*ast.Ident)
// do all possible checks early (before exiting due to errors)
// so we don't drop information on the floor
check.expr(x, kv.Value)
if key == nil {
check.errorf(kv.Pos(), "invalid field name %s in struct literal", kv.Key)