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Nasal-Interpreter
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Valk Richard Li 2019-09-20 12:37:00 -05:00 committed by GitHub
parent 46c8b4ca58
commit a3d44d47f6
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2 changed files with 62 additions and 6 deletions
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62
version1.0/nasal_parser.h
View File

@ -176,6 +176,37 @@ void nasal_parser::definition_expr()
}
void nasal_parser::assignment_expr()
{
get_token();
if(this_token.type!=__equal && this_token.type!=__add_equal
&& this_token.type!=__sub_equal && this_token.type!=__mul_equal
&& this_token.type!=__div_equal && this_token.type!=__link_equal)
{
parse.push(this_token);
return;
}
get_token();
switch(this_token.type)
{
case __id:identifier_begin_expr();break;
case __number:number_begin_expr();break;
case __string:string_begin_expr();break;
case __left_brace:hash_init_generator();break;
case __left_bracket:list_init_generator();break;
case __func:function_expr();break;
default:
++error;
std::cout<<">>[Error] line "<<this_token.line<<": must have a correct data type after operator."<<std::endl;
return;
break;
}
get_token();
if(this_token.type!=__semi)
{
++error;
std::cout<<">>[Error] line "<<this_token.line<<": expect a \';\' at the end of this line."<<std::endl;
parse.push(this_token);
return;
}
return;
}
void nasal_parser::loop_expr()
@ -363,11 +394,11 @@ void nasal_parser::identifier_begin_expr()
get_token();
switch(this_token.type)
{
case __add_equal:
case __sub_equal:add_sub_expr();break;
case __mul_equal:
case __div_equal:mul_div_expr();break;
case __link_equal:link_expr();break;
case __add_operator:
case __sub_operator:add_sub_expr();break;
case __mul_operator:
case __div_operator:mul_div_expr();break;
case __link_operator:link_expr();break;
case __equal:assignment_expr();break;
case __left_curve:call_function_expr();break;
case __left_bracket:list_search_expr();break;
@ -384,6 +415,27 @@ void nasal_parser::identifier_begin_expr()
std::cout<<"\" at this line."<<std::endl;
break;
}
get_token();
if(this_token.type==__semi)
parse.push(this_token);
else
{
switch(this_token.type)
{
case __equal:
case __add_equal:
case __sub_equal:
case __mul_equal:
case __div_equal:
case __link_equal:
parse.push(this_token);
assignment_expr();
break;
default:
parse.push(this_token);
break;
}
}
return;
}
void nasal_parser::number_begin_expr()

6
version1.0/test.txt
View File

@ -5,4 +5,8 @@ id(id);
id("str",1,1);
var e=1;
var x=10*2-20;
var id;
var id;
var id=[1,2,3,4];
var id={id:"str"};
id();
id.id();