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Add ternary condition (?:) operator

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This commit is contained in:
Jonathan Turner
2012-05-20 10:17:21 -07:00
parent 8af41b1d3c
commit 5aed00dd0b
4 changed files with 50 additions and 2 deletions
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23
include/chaiscript/language/chaiscript_eval.hpp
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@@ -685,6 +685,29 @@ namespace chaiscript
};
struct Ternary_Cond_AST_Node : public AST_Node {
public:
Ternary_Cond_AST_Node(const std::string &t_ast_node_text = "", int t_id = AST_Node_Type::If, const boost::shared_ptr<std::string> &t_fname=boost::shared_ptr<std::string>(), int t_start_line = 0, int t_start_col = 0, int t_end_line = 0, int t_end_col = 0) :
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
virtual ~Ternary_Cond_AST_Node() {}
virtual Boxed_Value eval_internal(chaiscript::detail::Dispatch_Engine &t_ss){
bool cond;
try {
cond = boxed_cast<bool>(this->children[0]->eval(t_ss));
}
catch (const exception::bad_boxed_cast &) {
throw exception::eval_error("If condition not boolean");
}
if (cond) {
return this->children[1]->eval(t_ss);
}
else {
return this->children[2]->eval(t_ss);
}
}
};
struct If_AST_Node : public AST_Node {
public:
If_AST_Node(const std::string &t_ast_node_text = "", int t_id = AST_Node_Type::If, const boost::shared_ptr<std::string> &t_fname=boost::shared_ptr<std::string>(), int t_start_line = 0, int t_start_col = 0, int t_end_line = 0, int t_end_col = 0) :