59 lines
1.9 KiB
Lua
59 lines
1.9 KiB
Lua
--[[
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This file is part of parser.lua - table based parsing
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Copyright (C) 2019 Soni L.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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--]]
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local parser = require "parser"
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do -- trim left spaces
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local defs = {}
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defs.self = defs
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defs[' '] = "whitespace"
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defs['\n'] = "whitespace"
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defs['\r'] = "whitespace"
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defs['\t'] = "whitespace"
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defs['\f'] = "whitespace"
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defs['\v'] = "whitespace"
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defs.whitespace = "self"
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defs[''] = function(state, token)
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state[#state + 1] = token
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if #state > 20 then
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state[1] = table.concat(state)
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for i=#state, 2, -1 do
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state[i] = nil
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end
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end
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return "start"
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end
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defs.start = {}
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defs.start.self = defs.start
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defs.start[''] = function(state, token)
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state[#state + 1] = token
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if #state > 20 then
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state[1] = table.concat(state)
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for i=#state, 2, -1 do
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state[i] = nil
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end
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end
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return "self"
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end
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for k,v in ipairs({"hello", " hello", "\t \v \n\r hallo", "I really like this parser thingy if it can be called that"}) do
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local state, err = parser.parse(defs, v)
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if not state then print(err) end
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print(table.concat(state))
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end
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end
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