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Nasal-Interpreter
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Add (var ids) or var (ids) when def

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Valk Richard Li 2019-10-08 07:08:16 -05:00 committed by GitHub
parent b73565d6e6
commit ddd1ee0254
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 53 additions and 2 deletions
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55
version1.0/nasal_parser.h
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@ -175,6 +175,7 @@ void nasal_parser::statements_block()
get_token();
while(this_token.type!=__right_brace)
{
token t;
switch(this_token.type)
{
case __var:definition_expr();check_semi_at_end();break;
@ -182,6 +183,20 @@ void nasal_parser::statements_block()
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;
@ -348,12 +363,34 @@ void nasal_parser::hash_generate_expr()
void nasal_parser::definition_expr()
{
get_token();
if(this_token.type!=__id)
if(this_token.type!=__id && this_token.type!=__left_curve)
{
++error;
std::cout<<">>[Error] line "<<this_token.line<<": expect an identifier."<<std::endl;
return;
}
if(this_token.type==__left_curve)
{
while(this_token.type!=__right_curve)
{
get_token();
if(this_token.type!=__id)
{
++error;
std::cout<<">>[Error] line "<<this_token.line<<": the expect type is identifier."<<std::endl;
return;
}
get_token();
if(this_token.type!=__comma && this_token.type!=__right_curve)
{
++error;
std::cout<<">>[Error] line "<<this_token.line<<": expect a ',' or ')'."<<std::endl;
return;
}
if(this_token.type==__right_curve)
break;
}
}
get_token();
if(this_token.type!=__equal && this_token.type!=__semi)
{
@ -1018,13 +1055,27 @@ void nasal_parser::parse_main_work()
while(!parse.empty())
{
get_token();
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 __left_curve:in_curve_calc_expr();check_semi_at_end();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 __if:parse.push(this_token);if_else_expr();break;
case __add_operator:
case __sub_operator: