xxq250
/
Nasal-Interpreter
mirror of https://github.com/ValKmjolnir/Nasal-Interpreter.git
1
0
Fork 0
Code Issues Actions 2 Packages Projects Releases Wiki Activity

Finish parser and error recognition

This commit is contained in:
Valk Richard Li 2019-08-22 17:45:19 +08:00 committed by GitHub
parent b3c0a67228
commit c088438896
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 441 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
version0.5/ebnf.cpp
View File

@ -17,8 +17,8 @@
<number> //NUMBER <number> //NUMBER
<string> //STRING <string> //STRING
<!> <identifier>|<scalar> <!> <identifier>|<scalar>
£¿£¿£¿£¿£¿£¿£¿£¿£¿£¿<identifier>|<scalar> <+>|<->|<*>|</>|<~>|<and>|<or>|<==>|<!=>|<<>|<<=>|<>>|<>=> <identifier>|<scalar> <identifier>|<scalar> <+>|<->|<*>|</>|<~>|<and>|<or>|<==>|<!=>|<<>|<<=>|<>>|<>=> <identifier>|<scalar>
£¿£¿£¿£¿£¿£¿£¿£¿£¿£¿<(> <identifier>|<scalar> <)> // find a way to distinguish while(scalar) with real (scalar+-scalar)*scalar <(> <identifier>|<scalar> <)> // find a way to distinguish while(scalar) with real (scalar+-scalar)*scalar
<2><scalars> ::= <2><scalars> ::=
<scalar>|<scalars> <,> <scalar>|<identifier> <scalar>|<scalars> <,> <scalar>|<identifier>
<identifier>|<identifiers> <,> <scalar> <identifier>|<identifiers> <,> <scalar>
@ -56,22 +56,22 @@
<var> <identifier> <=> <func> <(><)> <{> <statement>|<statements> <}> <var> <identifier> <=> <func> <(><)> <{> <statement>|<statements> <}>
<var> <identifier> <=> <func> <(> <identifier>|<identifiers> <)> <{> <statement>|<statements> <}> <var> <identifier> <=> <func> <(> <identifier>|<identifiers> <)> <{> <statement>|<statements> <}>
<10><loop> ::= <10><loop> ::=
<while> <(> <scalar> <)> <statement> <while> <scalar> <statement>
<while> <(> <scalar> <)> <{> <statement>|<statements> <}> <while> <scalar> <{> <statement>|<statements> <}>
<foreach>|<forindex> <(> <statement> <identifier> <)> <statement> <foreach>|<forindex> <(> <statement> <identifier> <)> <statement>
<foreach>|<forindex> <(> <statement> <identifier> <{> <statement>|<statements> <}> <foreach>|<forindex> <(> <statement> <identifier> <{> <statement>|<statements> <}>
<for> <(> <statement> <scalar> <;> <identifier> <+=>|<-=>|<*=>|</=>|<~=>|<=> <scalar> <)> <statement> <for> <(> <statements> <identifier> <+=>|<-=>|<*=>|</=>|<~=>|<=> <scalar> <)> <statement>
<for> <(> <statement> <scalar> <;> <identifier> <+=>|<-=>|<*=>|</=>|<~=>|<=> <scalar> <)> <{> <statement>|<statements> <}> <for> <(> <statements> <identifier> <+=>|<-=>|<*=>|</=>|<~=>|<=> <scalar> <)> <{> <statement>|<statements> <}>
<11><choose> ::= <11><choose> ::=
<if>|<elsif> <(> <scalar> <)> <{> <statement>|<statements> <}> <if>|<elsif> <scalar> <{> <statement>|<statements> <}>
<if>|<elsif> <(> <scalar> <)> <statement> <if>|<elsif> <scalar> <statement>
<else> <if> <(> <scalar> <)> <{> <statement>|<statements> <}> <else> <if> <scalar> <{> <statement>|<statements> <}>
<else> <if> <(> <scalar> <)> <statement> <else> <if> <scalar> <statement>
<else> <{> <statement>|<statements> <}> <else> <{> <statement>|<statements> <}>
<else> <statement> <else> <statement>
<12><statement> ::= <12><statement> ::=
<definition>|<assignment>|<__func>|<loop>|<choose> <definition>|<assignment>|<__func>|<loop>|<choose>
<identifier>|<continue>|<break> <;> <identifier>|<continue>|<break>|<scalar> <;>
<return> <identifier>|<scalar> <;> <return> <identifier>|<scalar> <;>
<13><statements> ::= <13><statements> ::=
<statement>|<statements> <statement> <statement>|<statements> <statement>

17
version0.5/nasal_interpreter.cpp
View File

@ -11,7 +11,7 @@ int main()
std::getline(std::cin,command); std::getline(std::cin,command);
if(command=="help") if(command=="help")
{ {
std::cout<<">> nasal-- script by ValKmjolnir"<<std::endl; std::cout<<">> nasal script by ValKmjolnir"<<std::endl;
std::cout<<">> 1. |input file name to run the lexer."<<std::endl; std::cout<<">> 1. |input file name to run the lexer."<<std::endl;
std::cout<<">> 2. \"cls\" |clear the screen."<<std::endl; std::cout<<">> 2. \"cls\" |clear the screen."<<std::endl;
std::cout<<">> 3. \"exit\" |shut down the program."<<std::endl; std::cout<<">> 3. \"exit\" |shut down the program."<<std::endl;
@ -43,13 +43,18 @@ int main()
nasal::nasal_var_stack.delete_all(); nasal::nasal_var_stack.delete_all();
nasal::nasal_func_stack.delete_all(); nasal::nasal_func_stack.delete_all();
} }
else if(command=="parser" || command=="run") else if(command=="parser")
{ {
nasal::nasal_parse.parse_work(nasal::nasal_lexer); nasal::nasal_parse.print_parser(nasal::nasal_lexer);
//nasal::nasal_parse.print_stack(); nasal::nasal_parse.print_error();
} }
else if(command=="run")
{
nasal::nasal_parse.run_parser(nasal::nasal_lexer);
nasal::nasal_parse.print_error();
}
else else
nasal::RunProcess(command); nasal::RunProcess(command);// in this section the lexer is cleaned
} }
return 0; return 0;
} }

463
version0.5/nasal_parse.h
View File

@ -31,9 +31,166 @@ enum token_type
__definition,__assignment, __definition,__assignment,
__loop,__continue,__break,__for,__forindex,__foreach,__while,// for()while() continue; break; __loop,__continue,__break,__for,__forindex,__foreach,__while,// for()while() continue; break;
__choose,__if,__elsif,__else,// if else if else __choose,__if,__elsif,__else,// if else if else
__return,__func_return __return
}; };
void print_token_type(int type)
{
std::string context="";
switch(type)
{
case __stack_end:
context="__stack_end";
break;
case __equal:
context="=";
break;
case __cmp_equal:
context="==";
break;
case __cmp_not_equal:
context="!=";
break;
case __cmp_less:
context="<";
break;
case __cmp_less_or_equal:
context="<=";
break;
case __cmp_more:
context=">";
break;
case __cmp_more_or_equal:
context=">=";
break;
case __and_operator:
context="and";
break;
case __or_operator:
context="or";
break;
case __nor_operator:
context="!";
break;
case __add_operator:
context="+";
break;
case __sub_operator:
context="-";
break;
case __mul_operator:
context="*";
break;
case __div_operator:
context="/";
break;
case __link_operator:
context="~";
break;
case __add_equal:
context="+=";
break;
case __sub_equal:
context="-=";
break;
case __mul_equal:
context="*=";
break;
case __div_equal:
context="/=";
break;
case __link_equal:
context="~=";
break;
case __left_brace:
context="{";
break;
case __right_brace:
context="}";
break;
case __left_bracket:
context="[";
break;
case __right_bracket:
context="]";
break;
case __left_curve:
context="(";
break;
case __right_curve:
context=")";
break;
case __semi:
context=";";
break;
case __comma:
context=",";
break;
case __colon:
context=":";
break;
case __dot:
context=".";
break;
case __var:
context="var";
break;
case __func:
context="func";
break;
case __identifier:
context="__id";
break;
case __identifiers:
context="__ids";
break;
case __scalar:
context="__scl";
break;
case __scalars:
context="__scls";
break;
case __hash_member:
context="__hmem";
break;
case __hash_members:
context="__hmems";
break;
case __continue:
context="continue";
break;
case __break:
context="break";
break;
case __for:
context="for";
break;
case __forindex:
context="forindex";
break;
case __foreach:
context="foreach";
break;
case __while:
context="while";
break;
case __if:
context="if";
break;
case __elsif:
context="elsif";
break;
case __else:
context="else";
break;
case __return:
context="return";
break;
}
std::cout<<context;
return;
}
struct parse_unit struct parse_unit
{ {
int type; int type;
@ -58,8 +215,9 @@ class parse
bool choose_reduction(); bool choose_reduction();
bool definition_check(); bool definition_check();
bool assignment_check(); bool assignment_check();
void parse_work(token_list&); void print_parser(token_list&);
void print_stack(); void run_parser(token_list&);
void print_error();
void stack_set_empty(); void stack_set_empty();
}; };
@ -564,9 +722,9 @@ bool parse::function_def()
} }
bool parse::loop_reduction() bool parse::loop_reduction()
{ {
int tbl[7]={0}; int tbl[10]={0};
std::stack<parse_unit> temp; std::stack<parse_unit> temp;
for(int i=0;i<7;++i) for(int i=0;i<10;++i)
{ {
if(parser.empty()) if(parser.empty())
break; break;
@ -574,14 +732,24 @@ bool parse::loop_reduction()
tbl[i]=temp.top().type; tbl[i]=temp.top().type;
parser.pop(); parser.pop();
} }
for(int i=0;i<7;++i) for(int i=0;i<10;++i)
{ {
if(temp.empty()) if(temp.empty())
break; break;
parser.push(temp.top()); parser.push(temp.top());
temp.pop(); temp.pop();
} }
if((tbl[4]==__while) && (tbl[3]==__left_curve) && (tbl[2]==__scalar) && (tbl[1]==__right_curve) && (tbl[0]==__statement)) if((tbl[2]==__while) && (tbl[1]==__scalar) && (tbl[0]==__statement))
{
parse_unit t;
t.type=__loop;
t.line=parser.top().line;
for(int i=0;i<3;++i)
parser.pop();
parser.push(t);
return true;
}
else if((tbl[4]==__while) && (tbl[3]==__scalar) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace))
{ {
parse_unit t; parse_unit t;
t.type=__loop; t.type=__loop;
@ -591,32 +759,50 @@ bool parse::loop_reduction()
parser.push(t); parser.push(t);
return true; return true;
} }
else if((tbl[6]==__while) && (tbl[5]==__left_curve) && (tbl[4]==__scalar) && (tbl[3]==__right_curve) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace)) else if(((tbl[5]==__foreach) || (tbl[5]==__forindex)) && (tbl[4]==__left_curve) && (tbl[3]==__statement) && (tbl[2]==__identifier) && (tbl[1]==__right_curve) && (tbl[0]==__statement))
{ {
parse_unit t; parse_unit t;
t.type=__loop; t.type=__loop;
t.line=parser.top().line; t.line=parser.top().line;
for(int i=0;i<7;++i) for(int i=0;i<6;++i)
parser.pop(); parser.pop();
parser.push(t); parser.push(t);
return true; return true;
} }
else if(((tbl[4]==__for) || (tbl[4]==__foreach) || (tbl[4]==__forindex)) && (tbl[3]==__left_curve) && (tbl[2]==__statements) && (tbl[1]==__right_curve) && (tbl[0]==__statement)) else if(((tbl[7]==__foreach) || (tbl[7]==__forindex)) && (tbl[6]==__left_curve) && (tbl[5]==__statement) && (tbl[4]==__identifier) && (tbl[3]==__right_curve) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace))
{ {
parse_unit t; parse_unit t;
t.type=__loop; t.type=__loop;
t.line=parser.top().line; t.line=parser.top().line;
for(int i=0;i<5;++i) for(int i=0;i<8;++i)
parser.pop(); parser.pop();
parser.push(t); parser.push(t);
return true; return true;
} }
else if(((tbl[6]==__for) || (tbl[6]==__foreach) || (tbl[6]==__forindex)) && (tbl[5]==__left_curve) && (tbl[4]==__statements) && (tbl[3]==__right_curve) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace)) else if((tbl[7]==__for) && (tbl[6]==__left_curve) && (tbl[5]==__statements)
&& (tbl[4]==__identifier)
&& ((tbl[3]==__equal) || (tbl[3]==__add_equal) || (tbl[3]==__sub_equal) || (tbl[3]==__mul_equal) || (tbl[3]==__div_equal) || (tbl[3]==__link_equal) || (tbl[3]==__equal))
&& ((tbl[2]==__identifier) || (tbl[2]==__scalar))
&& (tbl[1]==__right_curve) && (tbl[0]==__statement))
{ {
parse_unit t; parse_unit t;
t.type=__loop; t.type=__loop;
t.line=parser.top().line; t.line=parser.top().line;
for(int i=0;i<7;++i) for(int i=0;i<8;++i)
parser.pop();
parser.push(t);
return true;
}
else if((tbl[9]==__for) && (tbl[8]==__left_curve) && (tbl[7]==__statements)
&& (tbl[6]==__identifier)
&& ((tbl[5]==__equal) || (tbl[5]==__add_equal) || (tbl[5]==__sub_equal) || (tbl[5]==__mul_equal) || (tbl[5]==__div_equal) || (tbl[5]==__link_equal) || (tbl[5]==__equal))
&& ((tbl[4]==__identifier) || (tbl[4]==__scalar))
&& (tbl[3]==__right_curve) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace))
{
parse_unit t;
t.type=__loop;
t.line=parser.top().line;
for(int i=0;i<10;++i)
parser.pop(); parser.pop();
parser.push(t); parser.push(t);
return true; return true;
@ -642,7 +828,17 @@ bool parse::choose_reduction()
parser.push(temp.top()); parser.push(temp.top());
temp.pop(); temp.pop();
} }
if(((tbl[4]==__if) || (tbl[4]==__elsif)) && (tbl[3]==__left_curve) && (tbl[2]==__scalar) && (tbl[1]==__right_curve) && (tbl[0]==__statement)) if(((tbl[2]==__if) || (tbl[2]==__elsif)) && (tbl[1]==__scalar) && (tbl[0]==__statement))
{
parse_unit t;
t.type=__choose;
t.line=parser.top().line;
for(int i=0;i<3;++i)
parser.pop();
parser.push(t);
return true;
}
else if(((tbl[4]==__if) || (tbl[4]==__elsif)) && (tbl[3]==__scalar) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace))
{ {
parse_unit t; parse_unit t;
t.type=__choose; t.type=__choose;
@ -652,17 +848,17 @@ bool parse::choose_reduction()
parser.push(t); parser.push(t);
return true; return true;
} }
else if(((tbl[6]==__if) || (tbl[6]==__elsif)) && (tbl[5]==__left_curve) && (tbl[4]==__scalar) && (tbl[3]==__right_curve) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace)) else if((tbl[3]==__else) && (tbl[2]==__if) && (tbl[1]==__scalar) && (tbl[0]==__statement))
{ {
parse_unit t; parse_unit t;
t.type=__choose; t.type=__choose;
t.line=parser.top().line; t.line=parser.top().line;
for(int i=0;i<7;++i) for(int i=0;i<4;++i)
parser.pop(); parser.pop();
parser.push(t); parser.push(t);
return true; return true;
} }
else if((tbl[5]==__else) && (tbl[4]==__if) && (tbl[3]==__left_curve) && (tbl[2]==__scalar) && (tbl[1]==__right_curve) && (tbl[0]==__statement)) else if((tbl[5]==__else) && (tbl[4]==__if) && (tbl[3]==__scalar) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace))
{ {
parse_unit t; parse_unit t;
t.type=__choose; t.type=__choose;
@ -672,16 +868,6 @@ bool parse::choose_reduction()
parser.push(t); parser.push(t);
return true; return true;
} }
else if((tbl[7]==__else) && (tbl[6]==__if) && (tbl[5]==__left_curve) && (tbl[4]==__scalar) && (tbl[3]==__right_curve) && (tbl[2]==__left_brace) && ((tbl[1]==__statement) || (tbl[1]==__statements)) && (tbl[0]==__right_brace))
{
parse_unit t;
t.type=__choose;
t.line=parser.top().line;
for(int i=0;i<8;++i)
parser.pop();
parser.push(t);
return true;
}
else if((tbl[1]==__else) && (tbl[0]==__statement)) else if((tbl[1]==__else) && (tbl[0]==__statement))
{ {
parse_unit t; parse_unit t;
@ -742,7 +928,7 @@ bool parse::statement_check()
parser.push(t); parser.push(t);
return true; return true;
} }
else if((tbl[2]!=__return) && ((tbl[1]==__identifier) || (tbl[1]==__continue) || (tbl[1]==__break)) && (tbl[0]==__semi)) else if((tbl[2]!=__return) && ((tbl[1]==__identifier) || (tbl[1]==__continue) || (tbl[1]==__break) || (tbl[1]==__scalar)) && (tbl[0]==__semi))
{ {
parse_unit t; parse_unit t;
t.type=__statement; t.type=__statement;
@ -791,7 +977,7 @@ void parse::stack_set_empty()
parser.pop(); parser.pop();
return; return;
} }
void parse::parse_work(token_list& lexer) void parse::print_parser(token_list& lexer)
{ {
parse_unit temp_parse; parse_unit temp_parse;
token_unit *temp=lexer.get_head(); token_unit *temp=lexer.get_head();
@ -1004,26 +1190,215 @@ void parse::parse_work(token_list& lexer)
} }
return; return;
} }
void parse::run_parser(token_list& lexer)
void parse::print_stack()
{ {
std::cout<<">> parser stack:"<<std::endl; parse_unit temp_parse;
token_unit *temp=lexer.get_head();
stack_set_empty();
while(temp->next)
{
temp=temp->next;
temp_parse.line=temp->line;
if((temp->content=="var") || (temp->content=="func") || (temp->content=="return") || (temp->content=="nil") || (temp->content=="continue") || (temp->content=="break") || (temp->content=="and") || (temp->content=="or"))
{
if(temp->content=="var")
temp_parse.type=__var;
else if(temp->content=="func")
temp_parse.type=__func;
else if(temp->content=="return")
temp_parse.type=__return;
else if(temp->content=="nil")
temp_parse.type=__scalar;
else if(temp->content=="continue")
temp_parse.type=__continue;
else if(temp->content=="break")
temp_parse.type=__break;
else if(temp->content=="and")
temp_parse.type=__and_operator;
else if(temp->content=="or")
temp_parse.type=__or_operator;
}
else if(temp->type==IDENTIFIER)
{
temp_parse.type=__identifier;
}
else if((temp->content=="for") || (temp->content=="foreach") || (temp->content=="while") || (temp->content=="forindex"))
{
if(temp->content=="for")
temp_parse.type=__for;
else if(temp->content=="forindex")
temp_parse.type=__forindex;
else if(temp->content=="foreach")
temp_parse.type=__foreach;
else if(temp->content=="while")
temp_parse.type=__while;
}
else if((temp->content=="if") || (temp->content=="else") || (temp->content=="elsif"))
{
if(temp->content=="if")
temp_parse.type=__if;
else if(temp->content=="else")
temp_parse.type=__else;
else if(temp->content=="elsif")
temp_parse.type=__elsif;
}
else if((temp->content=="==") || (temp->content=="!=") || (temp->content==">") || (temp->content==">=") || (temp->content=="<") || (temp->content=="<="))
{
if(temp->content=="==")
temp_parse.type=__cmp_equal;
else if(temp->content=="!=")
temp_parse.type=__cmp_not_equal;
else if(temp->content==">")
temp_parse.type=__cmp_more;
else if(temp->content==">=")
temp_parse.type=__cmp_more_or_equal;
else if(temp->content=="<")
temp_parse.type=__cmp_less;
else if(temp->content=="<=")
temp_parse.type=__cmp_less_or_equal;
}
else if((temp->content==";") || (temp->content==",") || (temp->content=="=") || (temp->content==":") || (temp->content=="."))
{
if(temp->content==";")
temp_parse.type=__semi;
else if(temp->content==",")
temp_parse.type=__comma;
else if(temp->content=="=")
temp_parse.type=__equal;
else if(temp->content==":")
temp_parse.type=__colon;
else if(temp->content==".")
temp_parse.type=__dot;
}
else if((temp->type==NUMBER) || (temp->type==STRING))
{
temp_parse.type=__scalar;
}
else if((temp->content=="+") || (temp->content=="-") || (temp->content=="*") || (temp->content=="/") || (temp->content=="~") || (temp->content=="!"))
{
if(temp->content=="+")
temp_parse.type=__add_operator;
else if(temp->content=="-")
temp_parse.type=__sub_operator;
else if(temp->content=="*")
temp_parse.type=__mul_operator;
else if(temp->content=="/")
temp_parse.type=__div_operator;
else if(temp->content=="~")
temp_parse.type=__link_operator;
else if(temp->content=="!")
temp_parse.type=__nor_operator;
}
else if((temp->content=="+=") || (temp->content=="-=") || (temp->content=="*=") || (temp->content=="/=") || (temp->content=="~="))
{
if(temp->content=="+=")
temp_parse.type=__add_equal;
else if(temp->content=="-=")
temp_parse.type=__sub_equal;
else if(temp->content=="*=")
temp_parse.type=__mul_equal;
else if(temp->content=="/=")
temp_parse.type=__div_equal;
else if(temp->content=="~=")
temp_parse.type=__link_equal;
}
else if((temp->content=="(") || (temp->content==")") || (temp->content=="[") || (temp->content=="]") || (temp->content=="{") || (temp->content=="}"))
{
char c=temp->content[0];
switch(c)
{
case '(':
temp_parse.type=__left_curve;
break;
case ')':
temp_parse.type=__right_curve;
break;
case '[':
temp_parse.type=__left_bracket;
break;
case ']':
temp_parse.type=__right_bracket;
break;
case '{':
temp_parse.type=__left_brace;
break;
case '}':
temp_parse.type=__right_brace;
break;
}
}
parser.push(temp_parse);//push this into stack
bool reduction_complete=false;
while(!reduction_complete)
{
if(scalars_reduction())
continue;
if(identifier_check())
continue;
if(identifiers_reduction())
continue;
if(hashmember_check())
continue;
if(hashmembers_reduction())
continue;
if(calculation_reduction())
continue;
if(loop_reduction())
continue;
if(choose_reduction())
continue;
if(definition_check())
continue;
//assignment check must be put behind the definition check
//because the assignment check has the same method to check
//but assignment checks without a "var" so if you put the
//assignment before definition,there may be a mistake.
if(assignment_check())
continue;
if(function_def())
continue;
if(statement_check())
{
if(statements_reduction())
;
continue;
}
reduction_complete=true;
}
}
return;
}
void parse::print_error()
{
std::stack<parse_unit> temp_stack;
while(!parser.empty()) while(!parser.empty())
{ {
if(parser.top().type==__definition) if((parser.top().type!=__statement) && (parser.top().type!=__statements) && (parser.top().type!=__function) && (parser.top().type!=__definition) && (parser.top().type!=__assignment) && (parser.top().type!=__loop) && (parser.top().type!=__choose))
std::cout<<"line "<<parser.top().line<<": definition"<<std::endl; temp_stack.push(parser.top());
else if(parser.top().type==__assignment)
std::cout<<"line "<<parser.top().line<<": assignment"<<std::endl;
else if(parser.top().type==__statement)
std::cout<<"line "<<parser.top().line<<": statement"<<std::endl;
else if(parser.top().type==__statements)
std::cout<<"line "<<parser.top().line<<": statements"<<std::endl;
else if(parser.top().type==__function)
std::cout<<"line "<<parser.top().line<<": function()"<<std::endl;
else
std::cout<<"line "<<parser.top().line<<": "<<parser.top().type<<std::endl;
parser.pop(); parser.pop();
} }
if(!temp_stack.empty())
{
std::cout<<">>[Error]: Parse error."<<std::endl;
while(!temp_stack.empty())
{
int l=temp_stack.top().line;
std::cout<<"line "<<l<<": ";
while(l==temp_stack.top().line)
{
print_token_type(temp_stack.top().type);
std::cout<<" ";
temp_stack.pop();
if(temp_stack.empty())
break;
}
std::cout<<std::endl;
}
}
else
std::cout<<">> Parse analysis complete."<<std::endl;
return; return;
} }