diff options
Diffstat (limited to 'src/pkg/exp/eval/expr.go')
| -rw-r--r-- | src/pkg/exp/eval/expr.go | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/src/pkg/exp/eval/expr.go b/src/pkg/exp/eval/expr.go index 15520830f..8651b0780 100644 --- a/src/pkg/exp/eval/expr.go +++ b/src/pkg/exp/eval/expr.go @@ -589,14 +589,16 @@ func (a *exprCompiler) compile(x ast.Expr, callCtx bool) *expr { return ei.compileIndexExpr(l, r) case *ast.SliceExpr: - end := x.End - if end == nil { - // TODO: set end to len(x.X) - panic("unimplemented") - } + var hi *expr arr := a.compile(x.X, false) lo := a.compile(x.Index, false) - hi := a.compile(end, false) + if x.End == nil { + // End was omitted, so we need to compute len(x.X) + ei := &exprInfo{a.compiler, x.Pos()} + hi = ei.compileBuiltinCallExpr(a.block, lenType, []*expr{arr}) + } else { + hi = a.compile(x.End, false) + } if arr == nil || lo == nil || hi == nil { return nil } |