nix::ExprInheritFrom Struct Reference

#include <nixexpr.hh>

Inheritance diagram for nix::ExprInheritFrom:

Collaboration diagram for nix::ExprInheritFrom:

Public Member Functions
	ExprInheritFrom (PosIdx pos, Displacement displ, ref< Expr > fromExpr)
JSON	toJSON (SymbolTable const &symbols) const override
void	bindVars (Evaluator &es, const std::shared_ptr< const StaticEnv > &env) override
Public Member Functions inherited from nix::ExprVar
	ExprVar (Symbol name)
	ExprVar (const PosIdx &pos, Symbol name, bool needsRoot=false)
Value *	maybeThunk (EvalState &state, Env &env) override
Public Member Functions inherited from nix::Expr
	Expr (const Expr &)=delete
Expr &	operator= (const Expr &)=delete
virtual void	eval (EvalState &state, Env &env, Value &v)
virtual void	setName (Symbol name)
PosIdx	getPos () const

Public Attributes
ref< Expr >	fromExpr
Public Attributes inherited from nix::ExprVar
Symbol	name
ExprWith *	fromWith
Level	level
Displacement	displ
bool	needsRoot
Public Attributes inherited from nix::Expr
PosIdx	pos

Additional Inherited Members
Protected Member Functions inherited from nix::Expr
	Expr (Expr &&)=default
Expr &	operator= (Expr &&)=default
	Expr (const PosIdx pos)

Detailed Description

A pseudo-expression for the purpose of evaluating the from expression in inherit (from) syntax. Unlike normal variable references, the displacement is set during parsing, and always refers to ExprAttrs::inheritFromExprs (by itself or in ExprLet), whose values are put into their own Env.

Member Function Documentation

bindVars()

void nix::ExprInheritFrom::bindVars ( Evaluator & es, const std::shared_ptr< const StaticEnv > & env )

overridevirtual

Reimplemented from nix::Expr.

toJSON()

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

overridevirtual

Reimplemented from nix::Expr.

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

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