diff options
Diffstat (limited to 'src/libexpr/nixexpr.hh')
| -rw-r--r-- | src/libexpr/nixexpr.hh | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh index eb9fac25c..8c8f39640 100644 --- a/src/libexpr/nixexpr.hh +++ b/src/libexpr/nixexpr.hh @@ -76,17 +76,17 @@ string showAttrPath(const AttrPath & attrPath); struct Expr { virtual ~Expr() { }; - virtual void show(std::ostream & str); + virtual void show(std::ostream & str) const; virtual void bindVars(const StaticEnv & env); virtual void eval(EvalState & state, Env & env, Value & v); virtual Value * maybeThunk(EvalState & state, Env & env); virtual void setName(Symbol & name); }; -std::ostream & operator << (std::ostream & str, Expr & e); +std::ostream & operator << (std::ostream & str, const Expr & e); #define COMMON_METHODS \ - void show(std::ostream & str); \ + void show(std::ostream & str) const; \ void eval(EvalState & state, Env & env, Value & v); \ void bindVars(const StaticEnv & env); @@ -289,7 +289,7 @@ struct ExprOpNot : Expr Expr * e1, * e2; \ name(Expr * e1, Expr * e2) : e1(e1), e2(e2) { }; \ name(const Pos & pos, Expr * e1, Expr * e2) : pos(pos), e1(e1), e2(e2) { }; \ - void show(std::ostream & str) \ + void show(std::ostream & str) const \ { \ str << "(" << *e1 << " " s " " << *e2 << ")"; \ } \ |