literals.cc

/*
 * Copyright (c) 2013 Jonathan Anderson
 * All rights reserved.
 *
 * This software was developed by SRI International and the University of
 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
 * ("CTSRD"), as part of the DARPA CRASH research programme.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include "AST/literals.h"
#include "AST/Visitor.h"
#include "DAG/Primitive.h"
#include "Support/Bytestream.h"

using namespace fabrique;
using namespace fabrique::ast;


std::string BoolLiteral::str() const
{
    return (value() ? "true" : "false");
}

void BoolLiteral::PrettyPrint(Bytestream& out, size_t /*indent*/) const
{
    out
        << Bytestream::Literal << str()
        << Bytestream::Reset;
}

void BoolLiteral::Accept(Visitor& v) const { v.Enter(*this); v.Leave(*this); }

dag::ValuePtr BoolLiteral::evaluate(EvalContext&) const
{
    return dag::ValuePtr(new dag::Boolean(value(), type(), source()));
}


std::string IntLiteral::str() const
{
    return std::to_string(value());
}

void IntLiteral::PrettyPrint(Bytestream& out, size_t /*indent*/) const
{
    out << Bytestream::Literal << value() << Bytestream::Reset;
}

void IntLiteral::Accept(Visitor& v) const { v.Enter(*this); v.Leave(*this); }

dag::ValuePtr IntLiteral::evaluate(EvalContext&) const
{
    return dag::ValuePtr(new dag::Integer(value(), type(), source()));
}


std::string StringLiteral::str() const { return value(); }

void StringLiteral::PrettyPrint(Bytestream& out, size_t /*indent*/) const
{
    out << Bytestream::Literal << "'";

    std::string s = value();
    size_t i = 0;
    do
    {
        // Highlight variable references within strings.
        size_t dollarSign = s.find("$", i);
        out << s.substr(i, dollarSign - i);

        if (dollarSign == std::string::npos)
            break;

        size_t end;
        if (s[dollarSign + 1] == '{')
            end = s.find("}", dollarSign + 1) + 1;

        else
            end = std::min(
                s.find(" ", dollarSign + 1),
                s.find(".", dollarSign + 1)
            );

        out
            << Bytestream::Reference
            << s.substr(dollarSign, end - dollarSign)
            << Bytestream::Literal
            ;

        i = end;

    } while (i < s.length());

    out << "'" << Bytestream::Reset;
}

void StringLiteral::Accept(Visitor& v) const { v.Enter(*this); v.Leave(*this); }

dag::ValuePtr StringLiteral::evaluate(EvalContext&) const
{
    return dag::ValuePtr(new dag::String(value(), type(), source()));
}