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|
%code provides {
#define YY_DECL \
int yylex(ASTGraph* graph)
extern YY_DECL;
}
%{
#include <stdio.h>
#include <fstream>
#include <streambuf>
#include <string>
#include <unordered_map>
#include <vector>
#include "caffe2/opt/nql/ast.h"
extern int yyparse(ASTGraph* graph);
void yyerror(ASTGraph* graph, const char* s) {
printf("ERROR: %s\n", s);
}
typedef struct yy_buffer_state* YY_BUFFER_STATE;
extern YY_BUFFER_STATE yy_scan_string(const char* str);
extern void yy_delete_buffer(YY_BUFFER_STATE buffer);
std::unordered_map<std::string, ASTExpr*> vmap;
std::vector<void*> tokens;
std::vector<void*> tokenVectors;
std::string* allocString() {
std::string* n = new std::string();
tokens.push_back(n);
return n;
}
std::vector<void*>* allocVector() {
std::vector<void*>* n = new std::vector<void*>();
tokenVectors.push_back(n);
return n;
}
ASTExpr* getStarExpr() {
ASTExpr* new_ex = new ASTExpr;
new_ex->name = "*";
new_ex->isCallFlag = false;
new_ex->starInputsFlag = true;
return new_ex;
}
ASTExpr* getOrCreateVar(std::string * name) {
if (*name == "*") {
return getStarExpr();
}
if (vmap.count(*name)) {
return vmap[*name];
}
ASTExpr* new_ex = new ASTExpr;
new_ex->name = *name;
new_ex->isCallFlag = false;
return new_ex;
}
ASTExpr* processCall(std::string * name, std::vector<void*> * children) {
ASTExpr* new_ex = new ASTExpr;
new_ex->name = *name;
new_ex->isCallFlag = true;
if (children) {
for (auto* e : *children) {
new_ex->children.push_back((ASTExpr*)e);
}
}
return new_ex;
}
ASTGraph* processGraph(
ASTGraph * graph, std::string * name, std::vector<void*> * stmts) {
graph->name = *name;
if (stmts) {
for (auto* e : *stmts) {
graph->stmts.push_back((ASTStmt*)e);
}
}
return graph;
}
ASTStmt* processStmt(std::vector<void*> * outputs, ASTExpr * r) {
ASTStmt* new_st = new ASTStmt;
if (outputs) {
for (auto* e : *outputs) {
new_st->lhs.push_back(*((std::string*)e));
}
}
new_st->rhs = r;
return new_st;
}
void parseString(const char* str, ASTGraph* graph) {
YY_BUFFER_STATE buffer = yy_scan_string(str);
yyparse(graph);
yy_delete_buffer(buffer);
}
void parseFile(const char* fname, ASTGraph* graph) {
std::ifstream t(fname);
std::string str(
(std::istreambuf_iterator<char>(t)), std::istreambuf_iterator<char>());
if (!str.size()) {
return;
}
const char* c_str = str.c_str();
parseString(c_str, graph);
}
%}
%lex-param { ASTGraph* graph }
%parse-param { ASTGraph* graph }
%union {
ASTGraph* graph;
std::string *pstr;
int token;
ASTExpr* expr;
ASTStmt* stmt;
std::vector<void*> *pvec;
}
%token <pstr> TIDENTIFIER TINTEGER TDOUBLE TVAR TSTAR
%token <token> TCEQ TCNE TCLT TCLE TCGT TCGE TEQUAL TPLUS TMINUS TDIV
%token <token> TLPAREN TRPAREN TLBRACE TRBRACE TCOMMA TDOT TCOLON TSEMICOLON TDEF
%type <pstr> ident var
%type <expr> expr
%type <stmt> stmt
%type <pvec> stmts vars exprs
/* Operator precedence for mathematical operators */
%left TPLUS TMINUS
%left TDIV
%start graph
%%
graph : TDEF ident TLBRACE stmts TRBRACE { processGraph(graph, $2, $4); }
| error { }
;
stmts : stmt { $$ = allocVector(); $$->push_back((void*)$1); }
| stmts stmt { $$->push_back($2); }
;
stmt : expr { $$ = processStmt(NULL, $1); }
| vars TEQUAL expr { $$ = processStmt($1, $3); }
;
exprs : expr { $$ = allocVector(); $$->push_back((void*)$1); }
| exprs TCOMMA expr { $$->push_back($3); }
;
expr : var { $$ = getOrCreateVar($1); }
| ident TLPAREN exprs TRPAREN { $$ = processCall($1, $3); }
;
vars : var { $$ = allocVector(); $$->push_back((void*)$1); }
| vars TCOMMA var { $$->push_back($3); }
;
var : TVAR { $$ = $1; }
| TSTAR { $$ = $1; }
;
ident : TIDENTIFIER { $$ = $1; }
;
%%
|
