Începe să lucrezi la tema 2 la TC

tc/README.md

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+# Tehnici de Compilare
+
+- [Tema 1](tema1): Lexer pentru limbajul Haskell folosind GNU flex
+- [Tema 2](tema2): Parser pentru limbajul Java folsoind GNU bison

tc/tema2/.gitignore

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+/build/

tc/tema2/HelloWorld.java

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+class HelloWorld {
+    public static void main(String[] args) {
+        System.out.println("Hello, world!");
+    }
+}

tc/tema2/Makefile

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+CXXFLAGS := -Wall -Wextra
+LDFLAGS :=
+BISONFLAGS :=
+
+.PHONY: compile clean
+
+run: build/java-parser
+	./$< HelloWorld.java
+
+compile:
+	build/java-parser
+
+clean:
+	-rm -r build
+
+build:
+	mkdir -p build
+
+build/common.hpp: common.hpp
+	cp $< $@
+
+build/java-parser: build/java-parser.o build/java-lexer.o | build
+	c++ $(LDFLAGS) -o $@ $^
+
+build/java-parser.o: build/java-parser.cpp build/common.hpp | build
+	c++ $(CXXFLAGS) -c -o $@ $<
+
+build/java-parser.cpp: java-parser.ypp | build
+	bison $(BISONFLAGS) -d -o $@ $<
+
+build/java-lexer.o: build/java-lexer.cpp build/common.hpp | build
+	cc $(CFLAGS) -c -o $@ $<
+
+build/java-lexer.cpp: java-lexer.ypp | build
+	flex -o $@ $<

tc/tema2/common.hpp

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+#pragma once
+
+#include "java-parser.hpp"
+
+#define YY_DECL yy::parser::symbol_type yylex()

tc/tema2/java-lexer.ypp

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+/** Lexical analyser for Java */
+
+/* Disable unneeded features */
+%option noyywrap nounput noinput batch
+
+/* Enable debug mode */
+%option debug
+
+%{
+    // Include the common interface
+    #include "common.hpp"
+
+    // Include the parser's function definitions
+    #include "java-parser.hpp"
+%}
+
+BLANK [[:space:]]
+
+DIGIT [0-9]
+
+INTEGER {DIGIT}+
+
+%%
+
+{INTEGER} return yy::parser::make_NUMBER(std::stoi(yytext));
+
+<<EOF>> return yy::parser::make_YYEOF();
+
+%%

tc/tema2/java-parser.ypp

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+// Require a modern version of Bison
+%require "3.5"
+
+// Generate C++ code
+%language "c++"
+
+// Use a type-save variant data structure for storing values
+%define api.value.type variant
+
+// Generate the various `make_<TOKEN>` functions
+%define api.token.constructor
+
+%{
+    #include "common.hpp"
+    YY_DECL;
+%}
+
+%%
+
+result:
+    list  {
+        std::cout << "List is: ";
+        for (const auto& s : $1) {
+            std::cout << s << ' ';
+        }
+        std::cout << '\n';
+    }
+;
+
+%nterm <std::vector<std::string>> list;
+list:
+  %empty     { /* Generates an empty string list */ }
+| list item  { $$ = $1; $$.push_back ($2); }
+;
+
+%nterm <std::string> item;
+%token <std::string> TEXT;
+%token <int> NUMBER;
+
+item:
+  TEXT
+| NUMBER  { $$ = std::to_string ($1); }
+;
+
+%%
+
+namespace yy
+{
+    // Report an error to the user.
+    void parser::error(const std::string& message)
+    {
+        std::cerr << message << '\n';
+    }
+}
+
+int main ()
+{
+    yy::parser java_parser;
+    return java_parser();
+}