CS-480
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Assignment-2
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Seemingly finish the assignment.

This commit is contained in:
Danila Fedorin 2019-05-12 23:02:48 -07:00
parent 3b2f6baff9
commit 4bc44f6d43
3 changed files with 40 additions and 24 deletions
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2
Makefile
View File

@ -1,7 +1,7 @@
all: scan all: scan
scan: main.cpp scanner.cpp parser.cpp scan: main.cpp scanner.cpp parser.cpp
g++ main.cpp scanner.cpp parser.cpp -o scan g++ -std=c++11 main.cpp scanner.cpp parser.cpp -o scan
scanner.cpp: scanner.l scanner.cpp: scanner.l
flex -o scanner.cpp scanner.l flex -o scanner.cpp scanner.l

18
parser.y
View File

@ -7,6 +7,7 @@
%} %}
%token TEOF
%token INDENT %token INDENT
%token DEDENT %token DEDENT
%token NEWLINE %token NEWLINE
@ -78,12 +79,27 @@ void yyerror(const char* s) {
std::set<std::string> varset; std::set<std::string> varset;
void print_standard(std::string* str) {
std::cout << "#include <iostream>" << std::endl;
std::cout << "int main() {" << std::endl;
for(auto& name : varset) {
std::cout << "double " << name << ";" << std::endl;
}
std::cout << " " << *str << std::endl;
for(auto& name : varset) {
std::cout << " std::cout << \"" << name << ": \" << " << name << "<< std::endl;" << std::endl;
}
std::cout << "}";
delete str;
}
%} %}
%% %%
program program
: stmts { std::cout << *$1 << std::endl; $$ = $1; } : stmts { print_standard($1); } TEOF
; ;
stmts stmts

44
scanner.l
View File

@ -26,8 +26,7 @@ std::stack<int> _indent_stack;
yypstate* state = yypstate_new(); yypstate* state = yypstate_new();
#define PUSH_TOKEN(i, str) do { \ #define PUSH_TOKEN(i, str) do { \
std::cout << i << ", " << str << std::endl; \ YYSTYPE temp = new std::string(str); \
YYSTYPE temp = str; \
int s = yypush_parse(state, i, &temp); \ int s = yypush_parse(state, i, &temp); \
if (s != YYPUSH_MORE) { \ if (s != YYPUSH_MORE) { \
yypstate_delete(state); \ yypstate_delete(state); \
@ -125,6 +124,7 @@ yypstate* state = yypstate_new();
_indent_stack.pop(); _indent_stack.pop();
PUSH_TOKEN(DEDENT, ""); PUSH_TOKEN(DEDENT, "");
} }
PUSH_TOKEN(TEOF, "");
yyterminate(); yyterminate();
} }
@ -142,39 +142,39 @@ yypstate* state = yypstate_new();
"return" { PUSH_TOKEN(RETURN, ""); } "return" { PUSH_TOKEN(RETURN, ""); }
"while" { PUSH_TOKEN(WHILE, ""); } "while" { PUSH_TOKEN(WHILE, ""); }
"True" { PUSH_TOKEN(BOOLEAN, "True"); } "True" { PUSH_TOKEN(BOOLEAN, "true"); }
"False" { PUSH_TOKEN(BOOLEAN, "True"); } "False" { PUSH_TOKEN(BOOLEAN, "false"); }
[a-zA-Z_][a-zA-Z0-9_]* { [a-zA-Z_][a-zA-Z0-9_]* {
PUSH_TOKEN(IDENTIFIER, ""); PUSH_TOKEN(IDENTIFIER, yytext);
} }
-?[0-9]*"."[0-9]+ { -?[0-9]*"."[0-9]+ {
PUSH_TOKEN(FLOAT, ""); PUSH_TOKEN(FLOAT, yytext);
} }
-?[0-9]+ { -?[0-9]+ {
PUSH_TOKEN(INTEGER, ""); PUSH_TOKEN(INTEGER, yytext);
} }
"=" { PUSH_TOKEN(ASSIGN, ""); } "=" { PUSH_TOKEN(ASSIGN, yytext); }
"+" { PUSH_TOKEN(PLUS, ""); } "+" { PUSH_TOKEN(PLUS, yytext); }
"-" { PUSH_TOKEN(MINUS, ""); } "-" { PUSH_TOKEN(MINUS, yytext); }
"*" { PUSH_TOKEN(TIMES, ""); } "*" { PUSH_TOKEN(TIMES, yytext); }
"/" { PUSH_TOKEN(DIVIDEDBY, ""); } "/" { PUSH_TOKEN(DIVIDEDBY, yytext); }
"==" { PUSH_TOKEN(EQ, ""); } "==" { PUSH_TOKEN(EQ, yytext); }
"!=" { PUSH_TOKEN(NEQ, ""); } "!=" { PUSH_TOKEN(NEQ, yytext); }
">" { PUSH_TOKEN(GT, ""); } ">" { PUSH_TOKEN(GT, yytext); }
">=" { PUSH_TOKEN(GTE, ""); } ">=" { PUSH_TOKEN(GTE, yytext); }
"<" { PUSH_TOKEN(LT, ""); } "<" { PUSH_TOKEN(LT, yytext); }
"<=" { PUSH_TOKEN(LTE, ""); } "<=" { PUSH_TOKEN(LTE, yytext); }
"(" { PUSH_TOKEN(LPAREN, ""); } "(" { PUSH_TOKEN(LPAREN, yytext); }
")" { PUSH_TOKEN(RPAREN, ""); } ")" { PUSH_TOKEN(RPAREN, yytext); }
"," { PUSH_TOKEN(COMMA, ""); } "," { PUSH_TOKEN(COMMA, yytext); }
":" { PUSH_TOKEN(COLON, ""); } ":" { PUSH_TOKEN(COLON, yytext); }
. { . {
std::cerr << "Unrecognized token on line " << yylineno << ": " std::cerr << "Unrecognized token on line " << yylineno << ": "