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go/types: print assignment operation for invalid operation errors

This is port of CL 357229 for types2 to go/types.

Change-Id: I35ed6b784969210a00ea5b36238df7d6b7fa18bc
Reviewed-on: https://go-review.googlesource.com/c/go/+/357230
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
This commit is contained in:
Cuong Manh Le 2021-10-20 12:31:53 +07:00
parent 73652af80d
commit fca46d0b36
2 changed files with 10 additions and 1 deletions

View File

@ -1000,7 +1000,11 @@ func (check *Checker) binary(x *operand, e ast.Expr, lhs, rhs ast.Expr, op token
if e != nil {
posn = e
}
check.invalidOp(posn, _MismatchedTypes, "%s (mismatched types %s and %s)", e, x.typ, y.typ)
if e != nil {
check.invalidOp(posn, _MismatchedTypes, "%s (mismatched types %s and %s)", e, x.typ, y.typ)
} else {
check.invalidOp(posn, _MismatchedTypes, "%s %s= %s (mismatched types %s and %s)", lhs, op, rhs, x.typ, y.typ)
}
}
x.mode = invalid
return

View File

@ -9,3 +9,8 @@ func g() {
var i int
_ = s /* ERROR invalid operation: s \+ i \(mismatched types string and int\) */ + i
}
func f(i int) int {
i /* ERROR invalid operation: i \+= "1" \(mismatched types int and untyped string\) */ += "1"
return i
}