Ryan Ward
ea72da76a6
Almost done, I have to rewrite the math parser though Found a major issue with it which causes some things not to work \ But when its done youll be able to do implicit multiplication and it should be compiled more efficently than before.
82 lines
1.9 KiB
Lua
82 lines
1.9 KiB
Lua
function table.print(tbl, indent)
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if type(tbl)~="table" then return end
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if not indent then indent = 0 end
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for k, v in pairs(tbl) do
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formatting = string.rep(' ', indent) .. k .. ': '
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if type(v) == 'table' then
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print(formatting)
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table.print(v, indent+1)
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else
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print(formatting .. tostring(v))
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end
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end
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end
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local special = {["("]=true,[")"]=true,["+"]=true,["-"]=true,["/"]=true,["*"]=true,["%"]=true,["^"]=true}
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function parse(e)
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local cmds = {}
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local state = 0
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local group = ""
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local nonSP = false
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local wasNum = false
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for i in e:gmatch(".") do
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if state == 0 then
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if i==" " then
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--
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elseif i=="(" and nonSP then
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--~ state = 1
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nonSP = false
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cmds[#cmds+1] = {Type="fwor",Func=group,args={{Type="ref",ref=true}}}
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group = ""
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cmds[#cmds+1]=i
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elseif i == "(" and wasNum and not nonSP then
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wasNum = false
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cmds[#cmds+1] = {Type="fwor",Func="MUL",args={{Type="const",val=group},{Type="ref",ref=true}}}
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group = ""
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cmds[#cmds+1]=i
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elseif tostring(tonumber(i))==i or i=="." then
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wasNum = true
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group = group .. i
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elseif special[i] then
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if not(group=="") and (nonSP or not wasNum) then
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cmds[#cmds+1] = {Type="var",data = group}
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group = ""
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cmds[#cmds+1]=i
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else
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if group~="" then
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cmds[#cmds+1] = group
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group = ""
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cmds[#cmds+1]=i
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nonSP = false
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else
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cmds[#cmds+1]=i
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nonSP = false
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end
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end
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else
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nonSP = true
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group = group .. i
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end
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elseif state == 1 then
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if i==")" then
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cmds[#cmds+1]=parse(group)
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group = ""
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state = 0
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else
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group = group .. i
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end
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end
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end
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if nonSP or not wasNum then
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cmds[#cmds+1] = {Tpye="const",data = group}
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else
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cmds[#cmds+1] = group
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end
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if cmds[1]=="" then table.remove(cmds,1) end
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if cmds[#cmds]=="" then table.remove(cmds) end
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return cmds
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end
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------------------
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expr = "test(2.4+20)/sqrt(100) + food"
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c=parse(expr)
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table.print(c)
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