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63 lines
2.7 KiB
63 lines
2.7 KiB
/*********************************************************************** |
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A JavaScript tokenizer / parser / beautifier / compressor. |
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https://github.com/mishoo/UglifyJS2 |
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-------------------------------- (C) --------------------------------- |
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Author: Mihai Bazon |
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<mihai.bazon@gmail.com> |
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http://mihai.bazon.net/blog |
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Distributed under the BSD license: |
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Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com> |
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions |
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are met: |
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* Redistributions of source code must retain the above |
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copyright notice, this list of conditions and the following |
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disclaimer. |
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* Redistributions in binary form must reproduce the above |
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copyright notice, this list of conditions and the following |
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disclaimer in the documentation and/or other materials |
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provided with the distribution. |
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY |
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE |
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, |
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR |
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF |
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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SUCH DAMAGE. |
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***********************************************************************/ |
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// bitfield flags to be stored in node.flags. |
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// These are set and unset during compression, and store information in the node without requiring multiple fields. |
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export const UNUSED = 0b00000001; |
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export const TRUTHY = 0b00000010; |
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export const FALSY = 0b00000100; |
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export const UNDEFINED = 0b00001000; |
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export const INLINED = 0b00010000; |
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// Nodes to which values are ever written. Used when keep_assign is part of the unused option string. |
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export const WRITE_ONLY = 0b00100000; |
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// information specific to a single compression pass |
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export const SQUEEZED = 0b0000000100000000; |
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export const OPTIMIZED = 0b0000001000000000; |
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export const TOP = 0b0000010000000000; |
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export const CLEAR_BETWEEN_PASSES = SQUEEZED | OPTIMIZED | TOP; |
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export const has_flag = (node, flag) => node.flags & flag; |
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export const set_flag = (node, flag) => { node.flags |= flag; }; |
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export const clear_flag = (node, flag) => { node.flags &= ~flag; };
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