floraachy/Nasal-Interpreter
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update

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This commit is contained in:
Valk Richard Li
2019-11-14 23:21:47 +08:00
committed by GitHub
parent 6081c643d0
commit 8502ef20cf
6 changed files with 37 additions and 10 deletions
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30
balloon/abstract_syntax_tree.cpp
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@@ -468,10 +468,14 @@ var abstract_syntax_tree::call_identifier()
}
else if(i->type==__call_function && temp.get_type()==__var_function)
{
var self;
self.set_type(__var_function);
self.set_name(temp.get_name());
self.set_function(temp.get_function());
std::list<var> parameter;
for(std::list<abstract_syntax_tree>::iterator j=i->children.begin();j!=i->children.end();++j)
parameter.push_back(j->calculation());
temp=temp.get_function().run_func(parameter);
temp=temp.get_function().run_func(parameter,self);
}
else
{
@@ -737,11 +741,23 @@ int abstract_syntax_tree::run_ifelse()
return ret;
}
var abstract_syntax_tree::run_func(std::list<var> parameter)
var abstract_syntax_tree::run_func(std::list<var> parameter,var self_func)
{
static int recursion_depth=0;
++recursion_depth;
if(recursion_depth>512)
{
exit_type=__sigsegv_segmentation_error;
std::cout<<">>[Runtime-error] line "<<line<<":[SIGSEGV] too deep recursion."<<std::endl;
return error_var;
}
var ret;
scope.add_new_block_scope();
scope.add_new_local_scope();
scope.add_new_var(self_func);
abstract_syntax_tree para=children.front();
abstract_syntax_tree blk=children.back();
std::list<abstract_syntax_tree>::iterator para_name=para.children.begin();
@@ -763,10 +779,11 @@ var abstract_syntax_tree::run_func(std::list<var> parameter)
if(exit_type==__process_exited_successfully)
{
int _t=blk.run_block();
// in case the exit_type is not __process_exited_successfully in run_block
// or the function does not have return value;
if(_t!=__return)
ret_stack.push(error_var);
}
else
ret_stack.push(error_var);
@@ -774,7 +791,7 @@ var abstract_syntax_tree::run_func(std::list<var> parameter)
scope.pop_last_block_scope();
ret=ret_stack.top();
ret_stack.pop();
--recursion_depth;
return ret;
}
@@ -793,6 +810,11 @@ int abstract_syntax_tree::run_block()
++j;
if(j!=i->children.end())
new_var=j->calculation();
if(new_var.get_type()==__var_function)
{
exit_type=__bad_definition;
std::cout<<">>[Runtime-error] line "<<line<<": cannot declare a function in any blocks."<<std::endl;
}
new_var.set_name(_name);
scope.add_new_var(new_var);
}