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Better ranged vector, now generated from a new prelude function

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This commit is contained in:
Jonathan Turner 2009-07-04 13:04:55 +00:00
parent cda30f3ed7
commit a76cc16922
2 changed files with 14 additions and 43 deletions
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47
chaiscript/chaiscript_eval.hpp
View File

@ -255,51 +255,12 @@ namespace chaiscript
break;
case (Token_Type::Inline_Range) : {
try {
retval = dispatch(ss.get_function("Vector"), dispatchkit::Param_List_Builder());
if (node->children.size() > 0) {
dispatchkit::Boxed_Value range_iter = dispatch(ss.get_function("clone"), dispatchkit::Param_List_Builder() << eval_token(ss, node->children[0]->children[0]->children[0]));
dispatchkit::Boxed_Value range_stop = eval_token(ss, node->children[0]->children[0]->children[1]);
dispatchkit::Boxed_Value not_equal;
bool cond = true;
try {
not_equal = dispatch(ss.get_function("!="), dispatchkit::Param_List_Builder() << range_iter << range_stop);
cond = dispatchkit::boxed_cast<bool &>(not_equal);
}
catch (std::exception &e) {
throw EvalError("Range values missing != comparison", node->children[0]);
}
dispatch(ss.get_function("push_back"), dispatchkit::Param_List_Builder() << retval << range_iter);
not_equal = dispatch(ss.get_function("!="), dispatchkit::Param_List_Builder() << range_iter << range_stop);
try {
cond = dispatchkit::boxed_cast<bool &>(not_equal);
}
catch (std::exception &e) {
throw EvalError("Range values missing != comparison", node->children[0]);
}
while (cond) {
try {
range_iter = dispatch(ss.get_function("clone"), dispatchkit::Param_List_Builder() << range_iter);
range_iter = dispatch(ss.get_function("++"), dispatchkit::Param_List_Builder() << range_iter);
dispatch(ss.get_function("push_back"), dispatchkit::Param_List_Builder() << retval << range_iter);
not_equal = dispatch(ss.get_function("!="), dispatchkit::Param_List_Builder() << range_iter << range_stop);
try {
cond = dispatchkit::boxed_cast<bool &>(not_equal);
}
catch (std::exception &e) {
throw EvalError("Range values missing != comparison", node->children[0]);
}
}
catch (const dispatchkit::dispatch_error &inner_e) {
throw EvalError("Can not find appropriate range increment", node->children[0]->children[i]);
}
}
}
retval = dispatch(ss.get_function("generate_range"), dispatchkit::Param_List_Builder()
<< eval_token(ss, node->children[0]->children[0]->children[0])
<< eval_token(ss, node->children[0]->children[0]->children[1]));
}
catch (const dispatchkit::dispatch_error &e) {
throw EvalError("Can not find appropriate 'Vector()'", node);
throw EvalError("Unable to generate range vector", node);
}
}
break;

10
chaiscript/chaiscript_prelude.hpp
View File

@ -134,6 +134,16 @@ def filter(container, f) : call_exists(range, container) { \n\
} \n\
retval \n\
} \n\
def generate_range(x, y) { \n\
var i = x; \n\
var retval = Vector(); \n\
retval.push_back(clone(i)); \n\
while (i != y) { \n\
++i; \n\
retval.push_back(clone(i)); \n\
} \n\
retval \n\
} \n\
def collate(x, y) { \n\
[x, y] \n\
} \n\