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Nasal-Interpreter
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update

This commit is contained in:
Valk Richard Li 2020-11-09 12:54:46 +08:00
parent a09b748093
commit 2b4b1af72c
2 changed files with 56 additions and 2 deletions
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4
nasal_misc.h
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@ -151,9 +151,9 @@ std::string trans_number_to_string(double number)
number-=(double)(int(number/integer_bit))*integer_bit;
integer_bit/=10;
}
if(number!=0)
if(number>0.000000001)
trans_num_string+='.';
while(number!=0)
while(number>0.000000001)
{
trans_num_string+=(char)('0'+int(number*10));
number*=10;

54
nasal_parse.h
View File

@ -788,6 +788,40 @@ nasal_ast nasal_parse::additive_expr()
++ptr;
if(ptr<tok_list_size) tmp.add_child(multive_expr());
else{ ++error; error_info(error_line,lack_calculation);}
if(tmp.get_type()!=ast_link && tmp.get_children()[0].get_type()==ast_number && tmp.get_children()[1].get_type()==ast_number)
{
double num1=tmp.get_children()[0].get_num();
double num2=tmp.get_children()[1].get_num();
double num;
if(tmp.get_type()==ast_add)
num=num1+num2;
else if(tmp.get_type()==ast_sub)
num=num1-num2;
tmp.set_type(ast_number);
tmp.set_num(num);
tmp.get_children().clear();
}
else if(tmp.get_type()==ast_link)
{
int type1=tmp.get_children()[0].get_type();
int type2=tmp.get_children()[1].get_type();
if((type1==ast_number || type1==ast_string) && (type2==ast_number || type2==ast_string))
{
std::string s1,s2;
if(type1==ast_number)
s1=trans_number_to_string(tmp.get_children()[0].get_num());
else
s1=tmp.get_children()[0].get_str();
if(type2==ast_number)
s2=trans_number_to_string(tmp.get_children()[1].get_num());
else
s2=tmp.get_children()[1].get_str();
s1+=s2;
tmp.set_type(ast_string);
tmp.set_str(s1);
tmp.get_children().clear();
}
}
node=tmp;
++ptr;
}
@ -818,6 +852,15 @@ nasal_ast nasal_parse::multive_expr()
error_info(error_line,lack_calculation);
break;
}
if(tmp.get_children()[0].get_type()==ast_number && tmp.get_children()[1].get_type()==ast_number)
{
double num1=tmp.get_children()[0].get_num();
double num2=tmp.get_children()[1].get_num();
double num=(tmp.get_type()==ast_mult? num1*num2:num1/num2);
tmp.set_type(ast_number);
tmp.set_num(num);
tmp.get_children().clear();
}
node=tmp;
++ptr;
}
@ -842,6 +885,17 @@ nasal_ast nasal_parse::unary()
node.add_child(scalar());
}
else{ ++error; error_info(error_line,lack_calculation);}
if(node.get_children()[0].get_type()==ast_number)
{
double num=node.get_children()[0].get_num();
if(node.get_type()==ast_unary_not)
num=(!num);
else
num=-num;
node.set_type(ast_number);
node.set_num(num);
node.get_children().clear();
}
return node;
}
nasal_ast nasal_parse::scalar()