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Add else: if(condition)command()>command(); > is else

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This commit is contained in:
Jeija 2012-08-10 10:19:33 +02:00
parent 0633809f73
commit 6a524b8cdd
1 changed files with 45 additions and 8 deletions
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53
mesecons_microcontroller/init.lua
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@ -159,13 +159,18 @@ function parse_yccode(code, pos)
while true do while true do
command, endi = parse_get_command(code, endi) command, endi = parse_get_command(code, endi)
if command == nil then return nil end if command == nil then return nil end
if command == true then break end if command == true then break end --end of code
if command == "if" then if command == "if" then
r, endi = yc_command_if(code, endi, yc_merge_portstates(Lreal, Lvirtual), eeprom) r, endi = yc_command_if(code, endi, yc_merge_portstates(Lreal, Lvirtual), eeprom)
if r == nil then return nil end if r == nil then return nil end
if r == true then -- nothing if r == true then -- nothing
elseif r == false then elseif r == false then
endi = yc_skip_to_endif(code, endi) endi_new = yc_skip_to_else (code, endi)
if endi_new == nil then --else > not found
endi = yc_skip_to_endif(code, endi)
else
endi = endi_new
end
if endi == nil then return nil end if endi == nil then return nil end
end end
else else
@ -197,16 +202,21 @@ function parse_get_command(code, starti)
s = nil s = nil
while s ~= "" do while s ~= "" do
s = string.sub(code, i, i) s = string.sub(code, i, i)
if s == ";" and starti == i then
starti = starti + 1
i = starti
s = string.sub(code, i, i)
end
if s == "(" then if s == "(" then
return string.sub(code, starti, i-1), i + 1 -- i: ( i+1 after ( return string.sub(code, starti, i-1), i + 1 -- i: ( i+1 after (
end end
i = i + 1 if s == ";" and starti == i then
starti = starti + 1
i = starti
elseif s == ">" then
starti = yc_skip_to_endif(code, starti)
if starti == nil then return nil end
i = starti
else
i = i + 1
end
end end
if starti == i-1 then if starti == i-1 then
return true, true return true, true
end end
@ -251,9 +261,36 @@ end
function yc_skip_to_endif(code, starti) function yc_skip_to_endif(code, starti)
local i = starti local i = starti
local s = false local s = false
local open_ifs = 1
while s ~= nil and s~= "" do while s ~= nil and s~= "" do
s = code:sub(i, i) s = code:sub(i, i)
if s == "i" and code:sub(i+1, i+1) == "f" then --if in µCScript
open_ifs = open_ifs + 1
end
if s == ";" then if s == ";" then
open_ifs = open_ifs - 1
end
if open_ifs == 0 then
return i + 1
end
i = i + 1
end
return nil
end
function yc_skip_to_else(code, starti)
local i = starti
local s = false
local open_ifs = 1
while s ~= nil and s~= "" do
s = code:sub(i, i)
if s == "i" and code:sub(i+1, i+1) == "f" then --if in µCScript
open_ifs = open_ifs + 1
end
if s == ";" then
open_ifs = open_ifs - 1
end
if open_ifs == 1 and s == ">" then
return i + 1 return i + 1
end end
i = i + 1 i = i + 1