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/*
* Copyright (C) 2022 Apple Inc. All rights reserved.
*
* 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 APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
*/
#pragma once
namespace WGSL {
struct SourcePosition {
unsigned m_line;
unsigned m_lineOffset;
unsigned m_offset;
};
struct SourceSpan {
// FIXME: we could possibly skip m_lineOffset and recompute it only when trying to show an error
// This would shrink the AST size by 32 bits per AST node, at the cost of a bit of code complexity in the error toString function.
unsigned m_line;
unsigned m_lineOffset;
unsigned m_offset;
unsigned m_length;
SourceSpan(unsigned line, unsigned lineOffset, unsigned offset, unsigned length)
: m_line(line)
, m_lineOffset(lineOffset)
, m_offset(offset)
, m_length(length)
{
}
SourceSpan(SourcePosition start, SourcePosition end)
: m_line(start.m_line)
, m_lineOffset(start.m_lineOffset)
, m_offset(start.m_offset)
, m_length(end.m_offset - start.m_offset)
{
}
bool operator==(const SourceSpan& other)
{
return (m_line == other.m_line
&& m_lineOffset == other.m_lineOffset
&& m_offset == other.m_offset
&& m_length == other.m_length);
}
};
}
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