xxq250/Nasal-Interpreter
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front end optimization&stack overflow prompt

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change parameter type to avoid unnecessary copies of string.
change stack depth from 65536<<4 to 16+(65536<<2).
now you could know stack overflow when it happens
This commit is contained in:
Valk Richard Li
2021-06-07 23:53:43 +08:00
parent a3dbaebfd8
commit 166fe32839
10 changed files with 172 additions and 396 deletions
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nasal_parse.h
+7 -20
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@@ -99,20 +99,11 @@ private:
nasal_ast break_expr();
nasal_ast ret_expr();
public:
int get_error();
void set_toklist(std::vector<token>&);
int get_error(){return error;}
void set_toklist(std::vector<token>& toks){tok_list=toks;}
void main_process();
nasal_ast& get_root();
nasal_ast& get_root(){return root;}
};
int nasal_parse::get_error()
{
return error;
}
void nasal_parse::set_toklist(std::vector<token>& toks)
{
tok_list=toks;
return;
}
void nasal_parse::main_process()
{
reset();
@@ -147,10 +138,6 @@ void nasal_parse::main_process()
<<"please check \'(\',\'[\',\'{\',\')\',\']\',\'}\' match or not.\n";
return;
}
nasal_ast& nasal_parse::get_root()
{
return root;
}
void nasal_parse::reset()
{
ptr=in_function=in_loop=error=0;
@@ -237,7 +224,7 @@ bool nasal_parse::check_function_end(nasal_ast& node)
if(
node.get_children().empty() ||
(
type!=ast_definition &&
type!=ast_def &&
type!=ast_equal &&
type!=ast_addeq &&
type!=ast_subeq &&
@@ -695,7 +682,7 @@ nasal_ast nasal_parse::scalar()
else if(tok_list[ptr].type==tok_var)
{
match(tok_var);
node.set_type(ast_definition);
node.set_type(ast_def);
node.add_child(id_gen());
match(tok_id);
match(tok_eq);
@@ -795,7 +782,7 @@ nasal_ast nasal_parse::subvec()
}
nasal_ast nasal_parse::definition()
{
nasal_ast node(tok_list[ptr].line,ast_definition);
nasal_ast node(tok_list[ptr].line,ast_def);
if(tok_list[ptr].type==tok_var)
{
match(tok_var);
@@ -1058,7 +1045,7 @@ nasal_ast nasal_parse::break_expr()
}
nasal_ast nasal_parse::ret_expr()
{
nasal_ast node(tok_list[ptr].line,ast_return);
nasal_ast node(tok_list[ptr].line,ast_ret);
match(tok_ret);
int type=tok_list[ptr].type;
if(type==tok_nil || type==tok_num || type==tok_str || type==tok_id || type==tok_func ||