nix::ExprSelect Struct Reference

Inheritance diagram for nix::ExprSelect:

Public Member Functions
	ExprSelect (const PosIdx &pos, std::unique_ptr< Expr > e, AttrPath attrPath, std::unique_ptr< Expr > def)
	ExprSelect (const PosIdx &pos, std::unique_ptr< Expr > e, const PosIdx namePos, Symbol name)
JSON	toJSON (const SymbolTable &symbols) const override
void	eval (EvalState &state, Env &env, Value &v) override
void	accept (ExprVisitor &ev, std::unique_ptr< Expr > &ptr) override
Public Member Functions inherited from nix::Expr
	Expr (const Expr &)=delete
Expr &	operator= (const Expr &)=delete
virtual Value *	maybeThunk (EvalState &state, Env &env)
virtual void	setName (Symbol name)
PosIdx	getPos () const
template<typename E>
E &	cast ()
template<typename E>
E *	try_cast ()

Public Attributes
std::unique_ptr< Expr >	e
std::unique_ptr< Expr >	def
AttrPath	attrPath
Public Attributes inherited from nix::Expr
PosIdx	pos

Additional Inherited Members
Static Public Member Functions inherited from nix::Expr
static std::unique_ptr< Expr >	finalize (std::unique_ptr< Expr > parsed, Evaluator &es, const std::shared_ptr< const StaticEnv > &env)
Protected Member Functions inherited from nix::Expr
	Expr (Expr &&)=default
Expr &	operator= (Expr &&)=default
	Expr (const PosIdx pos)

Member Function Documentation

accept()

void nix::ExprSelect::accept ( ExprVisitor & ev, std::unique_ptr< Expr > & ptr )

inlineoverridevirtual

Implements nix::Expr.

eval()

void nix::ExprSelect::eval ( EvalState & state, Env & env, Value & v )

overridevirtual

Reimplemented from nix::Expr.

toJSON()

JSON nix::ExprSelect::toJSON ( const SymbolTable & symbols ) const

overridevirtual

Reimplemented from nix::Expr.

Member Data Documentation

attrPath

AttrPath nix::ExprSelect::attrPath

The path of attributes being selected. e.g. bar.baz in foo.bar.baz.

def

std::unique_ptr<Expr> nix::ExprSelect::def

A default value specified with or, if the selected attr doesn't exist. e.g. bix in foo.bar.baz or bix

e

std::unique_ptr<Expr> nix::ExprSelect::e

The expression attributes are being selected on. e.g. foo in foo.bar.baz.

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The documentation for this struct was generated from the following files:

• lix/libexpr/nixexpr.hh
• lix/libexpr/eval.cc
• lix/libexpr/nixexpr.cc