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Nasal-Interpreter
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Add one statement after 'if' ...

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Valk Richard Li 2019-10-08 10:00:39 -05:00 committed by GitHub
parent ddd1ee0254
commit d023fb29f7
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 309 additions and 7 deletions
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316
version1.0/nasal_parser.h
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@ -406,12 +406,15 @@ void nasal_parser::definition_expr()
return;
}
get_token();
token t;
t.line=this_token.line;
t.type=__semi;
switch(this_token.type)
{
case __number:number_begin_expr();break;
case __string:string_begin_expr();break;
case __id:identifier_begin_expr();break;
case __func:function_generate_expr();break;
case __func:function_generate_expr();parse.push(t);break;
case __add_operator:
case __sub_operator:
case __nor_operator:one_operator_expr();break;
@ -506,7 +509,56 @@ void nasal_parser::if_else_expr()
std::cout<<">>[Error] line "<<this_token.line<<": expect a ')' when making a condition."<<std::endl;
return;
}
statements_block();
get_token();
if(this_token.type==__left_brace)
{
// if without { then only one statement is behind it
parse.push(this_token);
statements_block();
}
else
{
token t;
switch(this_token.type)
{
case __var:definition_expr();check_semi_at_end();break;
case __id:identifier_begin_expr();check_semi_at_end();break;
case __number:number_begin_expr();check_semi_at_end();break;
case __string:string_begin_expr();check_semi_at_end();break;
case __if:parse.push(this_token);if_else_expr();break;
case __left_curve:
t=this_token;
get_token();
if(this_token.type==__var)
{
parse.push(t);
definition_expr();
}
else
{
in_curve_calc_expr();
}
check_semi_at_end();
break;
case __add_operator:
case __sub_operator:
case __nor_operator:one_operator_expr();break;
case __while:
case __for:
case __foreach:
case __forindex:parse.push(this_token);loop_expr();break;
case __continue:
case __break:check_semi_at_end();break;
case __semi:break;
case __return:return_expr();check_semi_at_end();break;
default:
std::cout<<">>[Error] line "<<this_token.line<<": \'";
print_token(this_token.type);
std::cout<<"\' in an incorrect place."<<std::endl;
++error;
break;
}
}
if(parse.empty())
return;
get_token();
@ -541,13 +593,113 @@ void nasal_parser::if_else_expr()
std::cout<<">>[Error] line "<<this_token.line<<": expect a ')' when making a condition."<<std::endl;
return;
}
statements_block();
get_token();
if(this_token.type==__left_brace)
{
// if without { then only one statement is behind it
parse.push(this_token);
statements_block();
}
else
{
token t;
switch(this_token.type)
{
case __var:definition_expr();check_semi_at_end();break;
case __id:identifier_begin_expr();check_semi_at_end();break;
case __number:number_begin_expr();check_semi_at_end();break;
case __string:string_begin_expr();check_semi_at_end();break;
case __if:parse.push(this_token);if_else_expr();break;
case __left_curve:
t=this_token;
get_token();
if(this_token.type==__var)
{
parse.push(t);
definition_expr();
}
else
{
in_curve_calc_expr();
}
check_semi_at_end();
break;
case __add_operator:
case __sub_operator:
case __nor_operator:one_operator_expr();break;
case __while:
case __for:
case __foreach:
case __forindex:parse.push(this_token);loop_expr();break;
case __continue:
case __break:check_semi_at_end();break;
case __semi:break;
case __return:return_expr();check_semi_at_end();break;
default:
std::cout<<">>[Error] line "<<this_token.line<<": \'";
print_token(this_token.type);
std::cout<<"\' in an incorrect place."<<std::endl;
++error;
break;
}
}
if(parse.empty())
return;
get_token();
}
if(this_token.type==__else)
statements_block();
{
get_token();
if(this_token.type==__left_brace)
{
// if without { then only one statement is behind it
parse.push(this_token);
statements_block();
}
else
{
token t;
switch(this_token.type)
{
case __var:definition_expr();check_semi_at_end();break;
case __id:identifier_begin_expr();check_semi_at_end();break;
case __number:number_begin_expr();check_semi_at_end();break;
case __string:string_begin_expr();check_semi_at_end();break;
case __if:parse.push(this_token);if_else_expr();break;
case __left_curve:
t=this_token;
get_token();
if(this_token.type==__var)
{
parse.push(t);
definition_expr();
}
else
{
in_curve_calc_expr();
}
check_semi_at_end();
break;
case __add_operator:
case __sub_operator:
case __nor_operator:one_operator_expr();break;
case __while:
case __for:
case __foreach:
case __forindex:parse.push(this_token);loop_expr();break;
case __continue:
case __break:check_semi_at_end();break;
case __semi:break;
case __return:return_expr();check_semi_at_end();break;
default:
std::cout<<">>[Error] line "<<this_token.line<<": \'";
print_token(this_token.type);
std::cout<<"\' in an incorrect place."<<std::endl;
++error;
break;
}
}
}
else
parse.push(this_token);
return;
@ -587,7 +739,56 @@ void nasal_parser::loop_expr()
std::cout<<">>[Error] line "<<this_token.line<<": expect a ')' after 'while'."<<std::endl;
return;
}
statements_block();
get_token();
if(this_token.type==__left_brace)
{
// if without { then only one statement is behind it
parse.push(this_token);
statements_block();
}
else
{
token t;
switch(this_token.type)
{
case __var:definition_expr();check_semi_at_end();break;
case __id:identifier_begin_expr();check_semi_at_end();break;
case __number:number_begin_expr();check_semi_at_end();break;
case __string:string_begin_expr();check_semi_at_end();break;
case __if:parse.push(this_token);if_else_expr();break;
case __left_curve:
t=this_token;
get_token();
if(this_token.type==__var)
{
parse.push(t);
definition_expr();
}
else
{
in_curve_calc_expr();
}
check_semi_at_end();
break;
case __add_operator:
case __sub_operator:
case __nor_operator:one_operator_expr();break;
case __while:
case __for:
case __foreach:
case __forindex:parse.push(this_token);loop_expr();break;
case __continue:
case __break:check_semi_at_end();break;
case __semi:break;
case __return:return_expr();check_semi_at_end();break;
default:
std::cout<<">>[Error] line "<<this_token.line<<": \'";
print_token(this_token.type);
std::cout<<"\' in an incorrect place."<<std::endl;
++error;
break;
}
}
}
else if(this_token.type==__for)
{
@ -653,7 +854,56 @@ void nasal_parser::loop_expr()
std::cout<<">>[Error] line "<<this_token.line<<": expect a ')' after 'for('."<<std::endl;
return;
}
statements_block();
get_token();
if(this_token.type==__left_brace)
{
// if without { then only one statement is behind it
parse.push(this_token);
statements_block();
}
else
{
token t;
switch(this_token.type)
{
case __var:definition_expr();check_semi_at_end();break;
case __id:identifier_begin_expr();check_semi_at_end();break;
case __number:number_begin_expr();check_semi_at_end();break;
case __string:string_begin_expr();check_semi_at_end();break;
case __if:parse.push(this_token);if_else_expr();break;
case __left_curve:
t=this_token;
get_token();
if(this_token.type==__var)
{
parse.push(t);
definition_expr();
}
else
{
in_curve_calc_expr();
}
check_semi_at_end();
break;
case __add_operator:
case __sub_operator:
case __nor_operator:one_operator_expr();break;
case __while:
case __for:
case __foreach:
case __forindex:parse.push(this_token);loop_expr();break;
case __continue:
case __break:check_semi_at_end();break;
case __semi:break;
case __return:return_expr();check_semi_at_end();break;
default:
std::cout<<">>[Error] line "<<this_token.line<<": \'";
print_token(this_token.type);
std::cout<<"\' in an incorrect place."<<std::endl;
++error;
break;
}
}
}
else if(this_token.type==__forindex || this_token.type==__foreach)
{
@ -701,7 +951,56 @@ void nasal_parser::loop_expr()
std::cout<<">>[Error] line "<<this_token.line<<": expect a ')' after 'for('."<<std::endl;
return;
}
statements_block();
get_token();
if(this_token.type==__left_brace)
{
// if without { then only one statement is behind it
parse.push(this_token);
statements_block();
}
else
{
token t;
switch(this_token.type)
{
case __var:definition_expr();check_semi_at_end();break;
case __id:identifier_begin_expr();check_semi_at_end();break;
case __number:number_begin_expr();check_semi_at_end();break;
case __string:string_begin_expr();check_semi_at_end();break;
case __if:parse.push(this_token);if_else_expr();break;
case __left_curve:
t=this_token;
get_token();
if(this_token.type==__var)
{
parse.push(t);
definition_expr();
}
else
{
in_curve_calc_expr();
}
check_semi_at_end();
break;
case __add_operator:
case __sub_operator:
case __nor_operator:one_operator_expr();break;
case __while:
case __for:
case __foreach:
case __forindex:parse.push(this_token);loop_expr();break;
case __continue:
case __break:check_semi_at_end();break;
case __semi:break;
case __return:return_expr();check_semi_at_end();break;
default:
std::cout<<">>[Error] line "<<this_token.line<<": \'";
print_token(this_token.type);
std::cout<<"\' in an incorrect place."<<std::endl;
++error;
break;
}
}
}
else
{
@ -773,6 +1072,9 @@ void nasal_parser::compare_operator_expr()
case __string:string_begin_expr();break;
case __id:identifier_begin_expr();break;
case __left_curve:in_curve_calc_expr();break;
case __add_operator:
case __sub_operator:
case __nor_operator:one_operator_expr();break;
default:
++error;
std::cout<<">>[Error] line "<<this_token.line<<": expect a data after this operator."<<std::endl;