74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/** @file Lambda.hpp
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*
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* Author: Roland Conybeare
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**/
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#pragma once
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#include "Expression.hpp"
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#include <vector>
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#include <string>
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//#include <cstdint>
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namespace xo {
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namespace ast {
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/** @class Lambda
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* @brief abstract syntax tree for a function definition
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*
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**/
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class Lambda : public Expression {
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public:
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/** @p argv Formal parameters, in left-to-right order
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* @p body Expression for body of this function
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**/
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Lambda(const std::string & name,
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const std::vector<std::string> & argv,
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const ref::rp<Expression> & body);
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/** downcast from Expression **/
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static ref::brw<Lambda> from(ref::brw<Expression> x) {
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return ref::brw<Lambda>::from(x);
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}
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const std::string & name() const { return name_; }
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const std::string & type_str() const { return type_str_; }
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const std::vector<std::string> & argv() const { return argv_; }
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const ref::rp<Expression> & body() const { return body_; }
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/** return number of arguments expected by this function **/
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int n_arg() const { return argv_.size(); }
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// ----- Expression -----
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virtual void display(std::ostream & os) const override;
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private:
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/** lambda name. Initially supporting only form like
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* (define (foo x y z)
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* (+ (* x x) (* y y) (* z z)))
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*
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* In any case need to supply names for distinct things-for-which-code-is-generated
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* so that they can be linked etc.
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**/
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std::string name_;
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/** e.g.
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* "double(double,double)" for function of two doubles that returns a double
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**/
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std::string type_str_;
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/** formal argument names **/
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std::vector<std::string> argv_;
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/** function body **/
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ref::rp<Expression> body_;
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}; /*Lambda*/
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inline ref::rp<Lambda>
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make_lambda(const std::string & name,
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const std::vector<std::string> & argv,
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const ref::rp<Expression> & body)
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{
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return new Lambda(name, argv, body);
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}
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} /*namespace ast*/
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} /*namespace xo*/
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/** end Lambda.hpp **/
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