Cycle checking issue in check_inheritance function in PA4

Stanford CS1/CS143 Compilers Course Project - Cool

Stanford online course of CS143 Compilers: Link

Introduction

The full name of "Cool" is "The Classroom Object-Oriented Language". It is a small language designed for use in an undergraduate compiler course project by Stanford University. Cool has many of the features of modern programming languages, including objects, automatic memory management, and strong static typing. It generates code for a MIPS simulator.

More info:

Installing & Setup

There are two ways to configure the environment. One is to use the provided pre-configured Linux system via VirtualBox VM, the other is to install directly on your own installation of Linux (Debian-based system required). I prefer the second choice because the download is only 5.5MB, otherwise you would need to download the whole VM image which is over 700MB.

Assignments

PA2 - Lexical Analysis: Done
PA3 - Parsing: Done
PA4 - Semantic Analysis: Done
PA5 - Code Generation: Skipped

Troubleshooting

spim: No such file or directory

This is because you are running a 64-bit linux, which does not have the 32-bit libc installed.

For Ubuntu 16.04, you can fix it with:

sudo apt-get install libc6-i386

libfl.so: undefined reference to 'yylex'

Set the line %option noyywrap in the cool.flex file
Remove the -lfl part of the LIB= line in the makefile

	static void check_inheritance() {
	for (ClassTable::iterator it = classTable.begin(); it != classTable.end(); it++)
	if (it->first != Object && classTable.find(it->second->getParentName()) == classTable.end()) {
	curr_class = it->second;
	semant_error(curr_class) << "Class " << it->second->getName() << " inherits from an undefined class " << it->second->getParentName() << ".\n";
	}

	for (ClassTable::iterator it = classTable.begin(); it != classTable.end(); it++) {
	if (it->first == Object) continue;
	curr_class = it->second;
	Symbol cname = it->first;
	Symbol pname = it->second->getParentName();
	while (pname != Object) {
	if (pname == cname) {
	semant_error(curr_class) << "Class " << curr_class->getName() << ", or an ancestor of " << curr_class->getName() << ", is involved in an inheritance cycle.\n";
	break;
	}
	if (classTable.find(pname) == classTable.end())
	break;
	pname = classTable[pname]->getParentName();
	}
	}
	}

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cool-compiler's Introduction

Stanford CS1/CS143 Compilers Course Project - Cool

Introduction

Installing & Setup

Assignments

Troubleshooting

spim: No such file or directory

libfl.so: undefined reference to 'yylex'

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cool-compiler's Issues

Cycle checking issue in check_inheritance function in PA4

In arm 64Ubuntu i am not able to run

关于i686

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