mirror of
https://github.com/kanaka/mal.git
synced 2024-08-18 02:00:40 +03:00
8a19f60386
- Reorder README to have implementation list after "learning tool" bullet. - This also moves tests/ and libs/ into impls. It would be preferrable to have these directories at the top level. However, this causes difficulties with the wasm implementations which need pre-open directories and have trouble with paths starting with "../../". So in lieu of that, symlink those directories to the top-level. - Move the run_argv_test.sh script into the tests directory for general hygiene.
54 lines
1.2 KiB
Lua
54 lines
1.2 KiB
Lua
local rex = require('rex_pcre')
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local string = require('string')
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local table = require('table')
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local utils = require('utils')
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local types = require('types')
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local Env = {}
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function Env:new(outer, binds, exprs)
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local data = {}
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local newObj = {outer = outer, data = data}
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self.__index = self
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if binds then
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for i, b in ipairs(binds) do
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if binds[i].val == '&' then
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local new_exprs = types.List:new()
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for j = i, #exprs do
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table.insert(new_exprs, exprs[j])
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end
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table.remove(exprs, 1)
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data[binds[i+1].val] = new_exprs
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break
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end
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data[binds[i].val] = exprs[i]
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end
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end
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return setmetatable(newObj, self)
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end
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function Env:find(sym)
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if self.data[sym.val] ~= nil then
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return self
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else
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if self.outer ~= nil then
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return self.outer:find(sym)
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else
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return nil
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end
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end
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end
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function Env:set(sym,val)
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self.data[sym.val] = val
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return val
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end
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function Env:get(sym)
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local env = self:find(sym)
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if env then
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return env.data[sym.val]
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else
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types.throw("'"..sym.val.."' not found")
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end
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end
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return Env
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