#!/usr/bin/env lua local function lookupify(tb, dst, val) if not dst then dst = tb end if not val then val = true end for _, v in pairs(tb) do dst[v] = val end return tb end local WhiteChars = lookupify{' ', '\n', '\t', '\r'} local EscapeLookup = {['\r'] = '\\r', ['\n'] = '\\n', ['\t'] = '\\t', ['"'] = '\\"', ["'"] = "\\'"} local LowerChars = lookupify{'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'} local UpperChars = lookupify{'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'} local Digits = lookupify{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'} local HexDigits = lookupify{'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'a', 'B', 'b', 'C', 'c', 'D', 'd', 'E', 'e', 'F', 'f'} local BinDigits = lookupify{'0', '1'} local Symbols = lookupify{'+', '-', '*', '/', '^', '%', ',', '{', '}', '[', ']', '(', ')', ';', '#', '&', '|'} local Keywords = lookupify{ 'and', 'break', 'do', 'else', 'elseif', 'end', 'false', 'for', 'function', 'goto', 'if', 'in', 'local', 'nil', 'not', 'or', 'repeat', 'return', 'then', 'true', 'until', 'while', }; -- 6502 opcodes local Keywords_6502 = { 'adc', 'and', 'asl', 'bcc', 'bcs', 'beq', 'bit', 'bmi', 'bne', 'bpl', 'brk', 'bvc', 'bvs', 'clc', 'cld', 'cli', 'clv', 'cmp', 'cpx', 'cpy', 'dec', 'dex', 'dey', 'eor', 'inc', 'inx', 'iny', 'jmp', 'jsr', 'lda', 'ldx', 'ldy', 'lsr', 'nop', 'ora', 'pha', 'php', 'pla', 'plp', 'rol', 'ror', 'rti', 'rts', 'sbc', 'sec', 'sed', 'sei', 'sta', 'stx', 'sty', 'tax', 'tay', 'tsx', 'txa', 'txs', 'tya', -- illegal opcodes 'anc', 'ane', 'arr', 'asr', 'axs', 'dcp', 'dop', 'isb', 'jam', 'las', 'lax', 'rla', 'rra', 'sax', 'sbx', 'sha', 'shs', 'shx', 'shy', 'slo', 'sre', } local function syntax6502(on) lookupify(Keywords_6502, Keywords, on) end syntax6502(true) local opcode_implied = lookupify{ 'asl', 'brk', 'clc', 'cld', 'cli', 'clv', 'dex', 'dey', 'inx', 'iny', 'lsr', 'nop', 'pha', 'php', 'pla', 'plp', 'rol', 'ror', 'rti', 'rts', 'sec', 'sed', 'sei', 'tax', 'tay', 'tsx', 'txa', 'txs', 'tya', -- illegal opcodes 'jam', } local opcode_immediate = lookupify{ 'adc', 'and', 'cmp', 'cpx', 'cpy', 'eor', 'lda', 'ldx', 'ldy', 'ora', 'sbc', -- illegal opcodes 'anc', 'ane', 'arr', 'asr', 'jam', 'lax', 'nop', 'sbx', } local opcode_absolute = lookupify{ 'adc', 'and', 'asl', 'bit', 'cmp', 'cpy', 'cpx', 'dec', 'eor', 'inc', 'jmp', 'jsr', 'lda', 'ldx', 'ldy', 'lsr', 'nop', 'ora', 'rol', 'ror', 'sbc', 'sta', 'stx', 'sty', -- illegal opcodes 'dcp', 'isb', 'jam', 'lax', 'rla', 'rra', 'sax', 'slo', 'sre', } local opcode_absolute_x = lookupify{ 'adc', 'and', 'asl', 'cmp', 'dec', 'eor', 'inc', 'lda', 'ldy', 'lsr', 'ora', 'rol', 'ror', 'sbc', 'sta', -- illegal opcodes 'dcp', 'isb', 'jam', 'nop', 'rla', 'rra', 'shy', 'slo', 'sre', } local opcode_absolute_y = lookupify{ 'adc', 'and', 'cmp', 'eor', 'lda', 'ldx', 'ora', 'sbc', 'sta', 'stx', -- illegal opcodes 'dcp', 'isb', 'jam', 'las', 'lax', 'rla', 'rra', 'sax', 'sha', 'shx', 'slo', 'shs', 'sre', } local opcode_indirect = lookupify{ 'jmp', -- illegal opcodes 'jam', } local opcode_indirect_x = lookupify{ 'adc', 'and', 'cmp', 'eor', 'lda', 'ora', 'sbc', 'sta', -- illegal opcodes 'dcp', 'isb', 'jam', 'lax', 'rla', 'rra', 'sax', 'slo', 'sre', } local opcode_indirect_y = lookupify{ 'adc', 'and', 'cmp', 'eor', 'lda', 'ora', 'sbc', 'sta', -- illegal opcodes 'dcp', 'isb', 'jam', 'lax', 'rla', 'rra', 'sha', 'slo', 'sre', } local opcode_relative = lookupify{ 'bcc', 'bcs', 'beq', 'bmi', 'bne', 'bpl', 'bvc', 'bvs', } local Scope = { new = function(self, parent) local s = { Parent = parent, Locals = { }, Globals = { }, Children = { }, } if parent then table.insert(parent.Children, s) end return setmetatable(s, { __index = self }) end, AddLocal = function(self, v) table.insert(self.Locals, v) end, AddGlobal = function(self, v) table.insert(self.Globals, v) end, CreateLocal = function(self, name) local v v = self:GetLocal(name) if v then return v end v = { } v.Scope = self v.Name = name v.IsGlobal = false self:AddLocal(v) return v end, GetLocal = function(self, name) for k, var in pairs(self.Locals) do if var.Name == name then return var end end if self.Parent then return self.Parent:GetLocal(name) end end, CreateGlobal = function(self, name) local v v = self:GetGlobal(name) if v then return v end v = { } v.Scope = self v.Name = name v.IsGlobal = true self:AddGlobal(v) return v end, GetGlobal = function(self, name) for k, v in pairs(self.Globals) do if v.Name == name then return v end end if self.Parent then return self.Parent:GetGlobal(name) end end, } local function LexLua(src) --token dump local tokens = {} local st, err = pcall(function() --line / char / pointer tracking local p = 1 local line = 1 local char = 1 --get / peek functions local function get() local c = src:sub(p,p) if c == '\n' then char = 1 line = line + 1 else char = char + 1 end p = p + 1 return c end local function peek(n) n = n or 0 return src:sub(p+n,p+n) end local function consume(chars) local c = peek() for i = 1, #chars do if c == chars:sub(i,i) then return get() end end end --shared stuff local function generateError(err) return error(">> :"..line..":"..char..": "..err, 0) end local function tryGetLongString() local start = p if peek() == '[' then local equalsCount = 0 local depth = 1 while peek(equalsCount+1) == '=' do equalsCount = equalsCount + 1 end if peek(equalsCount+1) == '[' then --start parsing the string. Strip the starting bit for _ = 0, equalsCount+1 do get() end --get the contents local contentStart = p while true do --check for eof if peek() == '' then generateError("Expected `]"..string.rep('=', equalsCount).."]` near .", 3) end --check for the end local foundEnd = true if peek() == ']' then for i = 1, equalsCount do if peek(i) ~= '=' then foundEnd = false end end if peek(equalsCount+1) ~= ']' then foundEnd = false end else if peek() == '[' then -- is there an embedded long string? local embedded = true for i = 1, equalsCount do if peek(i) ~= '=' then embedded = false break end end if peek(equalsCount + 1) == '[' and embedded then -- oh look, there was depth = depth + 1 for i = 1, (equalsCount + 2) do get() end end end foundEnd = false end -- if foundEnd then depth = depth - 1 if depth == 0 then break else for i = 1, equalsCount + 2 do get() end end else get() end end --get the interior string local contentString = src:sub(contentStart, p-1) --found the end. Get rid of the trailing bit for i = 0, equalsCount+1 do get() end --get the exterior string local longString = src:sub(start, p-1) --return the stuff return contentString, longString else return nil end else return nil end end --main token emitting loop while true do --get leading whitespace. The leading whitespace will include any comments --preceding the token. This prevents the parser needing to deal with comments --separately. local leading = { } local leadingWhite = '' local longStr = false while true do local c = peek() if c == '#' and peek(1) == '!' and line == 1 then -- #! shebang for linux scripts get() get() leadingWhite = "#!" while peek() ~= '\n' and peek() ~= '' do leadingWhite = leadingWhite .. get() end local token = { Type = 'Comment', CommentType = 'Shebang', Data = leadingWhite, Line = line, Char = char } token.Print = function() return "<"..(token.Type .. string.rep(' ', 7-#token.Type)).." "..(token.Data or '').." >" end leadingWhite = "" table.insert(leading, token) end if c == ' ' or c == '\t' then --whitespace --leadingWhite = leadingWhite..get() local c2 = get() -- ignore whitespace table.insert(leading, { Type = 'Whitespace', Line = line, Char = char, Data = c2 }) elseif c == '\n' or c == '\r' then local nl = get() if leadingWhite ~= "" then local token = { Type = 'Comment', CommentType = longStr and 'LongComment' or 'Comment', Data = leadingWhite, Line = line, Char = char, } token.Print = function() return "<"..(token.Type .. string.rep(' ', 7-#token.Type)).." "..(token.Data or '').." >" end table.insert(leading, token) leadingWhite = "" end table.insert(leading, { Type = 'Whitespace', Line = line, Char = char, Data = nl }) elseif c == '-' and peek(1) == '-' then --comment get() get() leadingWhite = leadingWhite .. '--' local _, wholeText = tryGetLongString() if wholeText then leadingWhite = leadingWhite..wholeText longStr = true else while peek() ~= '\n' and peek() ~= '' do leadingWhite = leadingWhite..get() end end else break end end if leadingWhite ~= "" then local token = { Type = 'Comment', CommentType = longStr and 'LongComment' or 'Comment', Data = leadingWhite, Line = line, Char = char, } token.Print = function() return "<"..(token.Type .. string.rep(' ', 7-#token.Type)).." "..(token.Data or '').." >" end table.insert(leading, token) end --get the initial char local thisLine = line local thisChar = char local errorAt = ":"..line..":"..char..":> " local c = peek() --symbol to emit local toEmit = nil --branch on type if c == '' then --eof toEmit = { Type = 'Eof' } elseif UpperChars[c] or LowerChars[c] or c == '_' then --ident or keyword local start = p repeat get() c = peek() until not (UpperChars[c] or LowerChars[c] or Digits[c] or c == '_') local dat = src:sub(start, p-1) if Keywords[dat] then toEmit = {Type = 'Keyword', Data = dat} else toEmit = {Type = 'Ident', Data = dat} end elseif Digits[c] or (peek() == '.' and Digits[peek(1)]) then --number const local start = p local data_override if c == '0' and peek(1) == 'x' then get();get() while HexDigits[peek()] do get() end if consume('Pp') then consume('+-') while Digits[peek()] do get() end end elseif c == '0' and peek(1) == 'b' then get();get() while BinDigits[peek()] do get() end local pstart, val_s, val = p, src:sub(start+2, p-1), 0 for i=1,#val_s do if val_s:sub(i,i) == '1' then val = val + (1<<(#val_s-i)) end end if consume('Pp') then consume('+-') while Digits[peek()] do get() end end data_override = val .. src:sub(pstart, p-1) else while Digits[peek()] do get() end if consume('.') then while Digits[peek()] do get() end end if consume('Ee') then consume('+-') while Digits[peek()] do get() end end end toEmit = {Type = 'Number', Data = data_override or src:sub(start, p-1)} elseif c == '\'' or c == '\"' then local start = p --string const local delim = get() local contentStart = p while true do local c = get() if c == '\\' then get() --get the escape char elseif c == delim then break elseif c == '' then generateError("Unfinished string near ") end end local content = src:sub(contentStart, p-2) local constant = src:sub(start, p-1) toEmit = {Type = 'String', Data = constant, Constant = content} elseif c == '[' then local content, wholetext = tryGetLongString() if wholetext then toEmit = {Type = 'String', Data = wholetext, Constant = content} else get() toEmit = {Type = 'Symbol', Data = '['} end elseif c == '<' and peek(1) == c then get() get() toEmit = {Type = 'Symbol', Data = '<<'} elseif c == '>' and peek(1) == c then get() get() toEmit = {Type = 'Symbol', Data = '>>'} elseif consume('>=<') then toEmit = {Type = 'Symbol', Data = consume('=') and c..'=' or c} elseif consume('~') then toEmit = {Type = 'Symbol', Data = consume('=') and '~=' or '~'} elseif consume('.') then if consume('.') then if consume('.') then toEmit = {Type = 'Symbol', Data = '...'} else toEmit = {Type = 'Symbol', Data = '..'} end else toEmit = {Type = 'Symbol', Data = '.'} end elseif consume(':') then toEmit = {Type = 'Symbol', Data = consume(':') and '::' or ':'} elseif consume('/') then toEmit = {Type = 'Symbol', Data = consume('/') and '//' or '/'} elseif Symbols[c] then get() toEmit = {Type = 'Symbol', Data = c} else local contents, all = tryGetLongString() if contents then toEmit = {Type = 'String', Data = all, Constant = contents} else generateError("Unexpected Symbol `"..c.."` in source.", 2) end end --add the emitted symbol, after adding some common data toEmit.LeadingWhite = leading -- table of leading whitespace/comments --for k, tok in pairs(leading) do -- tokens[#tokens + 1] = tok --end toEmit.Line = thisLine toEmit.Char = thisChar toEmit.Print = function() return "<"..(toEmit.Type..string.rep(' ', 7-#toEmit.Type)).." "..(toEmit.Data or '').." >" end tokens[#tokens+1] = toEmit --halt after eof has been emitted if toEmit.Type == 'Eof' then break end end end) if not st then return false, err end --public interface: local tok = {} local savedP = {} local p = 1 function tok:getp() return p end function tok:setp(n) p = n end function tok:getTokenList() return tokens end --getters function tok:Peek(n) n = n or 0 return tokens[math.min(#tokens, p+n)] end function tok:Get(tokenList) local t = tokens[p] p = math.min(p + 1, #tokens) if tokenList then table.insert(tokenList, t) end return t end function tok:Is(t) return tok:Peek().Type == t end --save / restore points in the stream function tok:Save() savedP[#savedP+1] = p end function tok:Commit() savedP[#savedP] = nil end function tok:Restore() p = savedP[#savedP] savedP[#savedP] = nil end --either return a symbol if there is one, or return true if the requested --symbol was gotten. function tok:ConsumeSymbol(symb, tokenList) local t = self:Peek() if t.Type == 'Symbol' then if symb then if t.Data == symb then self:Get(tokenList) return true else return nil end else self:Get(tokenList) return t end else return nil end end function tok:ConsumeKeyword(kw, tokenList) local t = self:Peek() if t.Type == 'Keyword' and t.Data == kw then self:Get(tokenList) return true else return nil end end function tok:IsKeyword(kw) local t = tok:Peek() return t.Type == 'Keyword' and t.Data == kw end function tok:IsSymbol(s) local t = tok:Peek() return t.Type == 'Symbol' and t.Data == s end function tok:IsEof() return tok:Peek().Type == 'Eof' end return true, tok end local function ParseLua(src) local st, tok if type(src) ~= 'table' then st, tok = LexLua(src) else st, tok = true, src end if not st then return false, tok end -- local function GenerateError(msg) local err = ">> :"..tok:Peek().Line..":"..tok:Peek().Char..": "..msg.."\n" --find the line local lineNum = 0 if type(src) == 'string' then for line in src:gmatch("[^\n]*\n?") do if line:sub(-1,-1) == '\n' then line = line:sub(1,-2) end lineNum = lineNum+1 if lineNum == tok:Peek().Line then err = err..">> `"..line:gsub('\t',' ').."`\n" for i = 1, tok:Peek().Char do local c = line:sub(i,i) if c == '\t' then err = err..' ' else err = err..' ' end end err = err.." ^^^^" break end end end return err end -- local VarUid = 0 local function CreateScope(parent) local scope = Scope:new(parent) scope.Print = function() return "" end return scope end local ParseExpr local ParseStatementList local ParseSimpleExpr, ParseSubExpr, ParsePrimaryExpr, ParseSuffixedExpr local function ParseFunctionArgsAndBody(scope, tokenList) local funcScope = CreateScope(scope) if not tok:ConsumeSymbol('(', tokenList) then return false, GenerateError("`(` expected.") end --arg list local argList = {} local isVarArg = false while not tok:ConsumeSymbol(')', tokenList) do if tok:Is('Ident') then local arg = funcScope:CreateLocal(tok:Get(tokenList).Data) argList[#argList+1] = arg if not tok:ConsumeSymbol(',', tokenList) then if tok:ConsumeSymbol(')', tokenList) then break else return false, GenerateError("`)` expected.") end end elseif tok:ConsumeSymbol('...', tokenList) then isVarArg = true if not tok:ConsumeSymbol(')', tokenList) then return false, GenerateError("`...` must be the last argument of a function.") end break else return false, GenerateError("Argument name or `...` expected") end end --body local st, body = ParseStatementList(funcScope) if not st then return false, body end --end if not tok:ConsumeKeyword('end', tokenList) then return false, GenerateError("`end` expected after function body") end local nodeFunc = {} nodeFunc.AstType = 'Function' nodeFunc.Scope = funcScope nodeFunc.Arguments = argList nodeFunc.Body = body nodeFunc.VarArg = isVarArg nodeFunc.Tokens = tokenList -- return true, nodeFunc end function ParsePrimaryExpr(scope) local tokenList = {} if tok:ConsumeSymbol('(', tokenList) then local st, ex = ParseExpr(scope) if not st then return false, ex end if not tok:ConsumeSymbol(')', tokenList) then return false, GenerateError("`)` Expected.") end if false then --save the information about parenthesized expressions somewhere ex.ParenCount = (ex.ParenCount or 0) + 1 return true, ex else local parensExp = {} parensExp.AstType = 'Parentheses' parensExp.Inner = ex parensExp.Tokens = tokenList return true, parensExp end elseif tok:Is('Ident') then local id = tok:Get(tokenList) local var = scope:GetLocal(id.Data) if not var then var = scope:GetGlobal(id.Data) if not var then var = scope:CreateGlobal(id.Data) end end -- local nodePrimExp = {} nodePrimExp.AstType = 'VarExpr' nodePrimExp.Name = id.Data nodePrimExp.Variable = var nodePrimExp.Tokens = tokenList -- return true, nodePrimExp else return false, GenerateError("primary expression expected") end end function ParseSuffixedExpr(scope, onlyDotColon) --base primary expression local st, prim = ParsePrimaryExpr(scope) if not st then return false, prim end -- while true do local tokenList = {} if tok:IsSymbol('.') or tok:IsSymbol(':') then local symb = tok:Get(tokenList).Data if not tok:Is('Ident') then return false, GenerateError(" expected.") end local id = tok:Get(tokenList) local nodeIndex = {} nodeIndex.AstType = 'MemberExpr' nodeIndex.Base = prim nodeIndex.Indexer = symb nodeIndex.Ident = id nodeIndex.Tokens = tokenList -- prim = nodeIndex elseif not onlyDotColon and tok:ConsumeSymbol('[', tokenList) then local st, ex = ParseExpr(scope) if not st then return false, ex end if not tok:ConsumeSymbol(']', tokenList) then return false, GenerateError("`]` expected.") end local nodeIndex = {} nodeIndex.AstType = 'IndexExpr' nodeIndex.Base = prim nodeIndex.Index = ex nodeIndex.Tokens = tokenList -- prim = nodeIndex elseif not onlyDotColon and tok:ConsumeSymbol('(', tokenList) then local args = {} while not tok:ConsumeSymbol(')', tokenList) do local st, ex = ParseExpr(scope) if not st then return false, ex end args[#args+1] = ex if not tok:ConsumeSymbol(',', tokenList) then if tok:ConsumeSymbol(')', tokenList) then break else return false, GenerateError("`)` Expected.") end end end local nodeCall = {} nodeCall.AstType = 'CallExpr' nodeCall.Base = prim nodeCall.Arguments = args nodeCall.Tokens = tokenList -- prim = nodeCall elseif not onlyDotColon and tok:Is('String') then --string call local nodeCall = {} nodeCall.AstType = 'StringCallExpr' nodeCall.Base = prim nodeCall.Arguments = { tok:Get(tokenList) } nodeCall.Tokens = tokenList -- prim = nodeCall elseif not onlyDotColon and tok:IsSymbol('{') then --table call local st, ex = ParseSimpleExpr(scope) -- FIX: ParseExpr(scope) parses the table AND and any following binary expressions. -- We just want the table if not st then return false, ex end local nodeCall = {} nodeCall.AstType = 'TableCallExpr' nodeCall.Base = prim nodeCall.Arguments = { ex } nodeCall.Tokens = tokenList -- prim = nodeCall else break end end return true, prim end function ParseSimpleExpr(scope) local tokenList = {} if tok:Is('Number') then local nodeNum = {} nodeNum.AstType = 'NumberExpr' nodeNum.Value = tok:Get(tokenList) nodeNum.Tokens = tokenList return true, nodeNum elseif tok:Is('String') then local nodeStr = {} nodeStr.AstType = 'StringExpr' nodeStr.Value = tok:Get(tokenList) nodeStr.Tokens = tokenList return true, nodeStr elseif tok:ConsumeKeyword('nil', tokenList) then local nodeNil = {} nodeNil.AstType = 'NilExpr' nodeNil.Tokens = tokenList return true, nodeNil elseif tok:IsKeyword('false') or tok:IsKeyword('true') then local nodeBoolean = {} nodeBoolean.AstType = 'BooleanExpr' nodeBoolean.Value = (tok:Get(tokenList).Data == 'true') nodeBoolean.Tokens = tokenList return true, nodeBoolean elseif tok:ConsumeSymbol('...', tokenList) then local nodeDots = {} nodeDots.AstType = 'DotsExpr' nodeDots.Tokens = tokenList return true, nodeDots elseif tok:ConsumeSymbol('{', tokenList) then local v = {} v.AstType = 'ConstructorExpr' v.EntryList = {} -- while true do if tok:IsSymbol('[', tokenList) then --key tok:Get(tokenList) local st, key = ParseExpr(scope) if not st then return false, GenerateError("Key Expression Expected") end if not tok:ConsumeSymbol(']', tokenList) then return false, GenerateError("`]` Expected") end if not tok:ConsumeSymbol('=', tokenList) then return false, GenerateError("`=` Expected") end local st, value = ParseExpr(scope) if not st then return false, GenerateError("Value Expression Expected") end v.EntryList[#v.EntryList+1] = { Type = 'Key'; Key = key; Value = value; } elseif tok:Is('Ident') then --value or key local lookahead = tok:Peek(1) if lookahead.Type == 'Symbol' and lookahead.Data == '=' then --we are a key local key = tok:Get(tokenList) if not tok:ConsumeSymbol('=', tokenList) then return false, GenerateError("`=` Expected") end local st, value = ParseExpr(scope) if not st then return false, GenerateError("Value Expression Expected") end v.EntryList[#v.EntryList+1] = { Type = 'KeyString'; Key = key.Data; Value = value; } else --we are a value local st, value = ParseExpr(scope) if not st then return false, GenerateError("Value Exected") end v.EntryList[#v.EntryList+1] = { Type = 'Value'; Value = value; } end elseif tok:ConsumeSymbol('}', tokenList) then break else --value local st, value = ParseExpr(scope) v.EntryList[#v.EntryList+1] = { Type = 'Value'; Value = value; } if not st then return false, GenerateError("Value Expected") end end if tok:ConsumeSymbol(';', tokenList) or tok:ConsumeSymbol(',', tokenList) then --all is good elseif tok:ConsumeSymbol('}', tokenList) then break else return false, GenerateError("`}` or table entry Expected") end end v.Tokens = tokenList return true, v elseif tok:ConsumeKeyword('function', tokenList) then local st, func = ParseFunctionArgsAndBody(scope, tokenList) if not st then return false, func end -- func.IsLocal = true return true, func else return ParseSuffixedExpr(scope) end end local unops = lookupify{'-', 'not', '#', '~'} local unopprio = 12 local priority = { ['^'] = {14,13}; ['%'] = {11,11}; ['//'] = {11,11}; ['/'] = {11,11}; ['*'] = {11,11}; ['+'] = {10,10}; ['-'] = {10,10}; ['..'] = {9,8}; ['>>'] = {7,7}; ['<<'] = {7,7}; ['&'] = {6,6}; ['~'] = {5,5}; ['|'] = {4,4}; ['=='] = {3,3}; ['<'] = {3,3}; ['<='] = {3,3}; ['~='] = {3,3}; ['>'] = {3,3}; ['>='] = {3,3}; ['and'] = {2,2}; ['or'] = {1,1}; } function ParseSubExpr(scope, level) --base item, possibly with unop prefix local st, exp if unops[tok:Peek().Data] then local tokenList = {} local op = tok:Get(tokenList).Data st, exp = ParseSubExpr(scope, unopprio) if not st then return false, exp end local nodeEx = {} nodeEx.AstType = 'UnopExpr' nodeEx.Rhs = exp nodeEx.Op = op nodeEx.OperatorPrecedence = unopprio nodeEx.Tokens = tokenList exp = nodeEx else st, exp = ParseSimpleExpr(scope) if not st then return false, exp end end --next items in chain while true do local prio = priority[tok:Peek().Data] if prio and prio[1] > level then local tokenList = {} local op = tok:Get(tokenList).Data local st, rhs = ParseSubExpr(scope, prio[2]) if not st then return false, rhs end local nodeEx = {} nodeEx.AstType = 'BinopExpr' nodeEx.Lhs = exp nodeEx.Op = op nodeEx.OperatorPrecedence = prio[1] nodeEx.Rhs = rhs nodeEx.Tokens = tokenList -- exp = nodeEx else break end end return true, exp end ParseExpr = function(scope) return ParseSubExpr(scope, 0) end local function ParseStatement(scope) local stat = nil local tokenList = {} local opcode_tok local function emit_opcode(op, expr) local c,l = opcode_tok.Char, opcode_tok.Line local op_var = { AstType = 'VarExpr', Name = op, Variable = { IsGlobal=true, Name=op, Scope=CreateScope(scope) }, Tokens = { { LeadingWhite = opcode_tok.LeadingWhite, Type='Ident', Data=op, Char=c, Line=l, Print=function() return '' end }, } } local exp_call = { AstType = 'CallExpr', Base = op_var, Arguments = {expr}, Tokens = { { LeadingWhite = {}, Type='Symbol', Data='(', Char=c, Line=l, Print=function() return '' end }, { LeadingWhite = {}, Type='Symbol', Data=')', Char=c, Line=l, Print=function() return '' end }, } } return { AstType = 'CallStatement', Expression = exp_call, Tokens = {} } end for _,op in pairs(Keywords_6502) do if tok:ConsumeKeyword(op, tokenList) then opcode_tok = tokenList[1] if opcode_relative[op] then local st, expr = ParseExpr(scope) if not st then return false, expr end if expr.AstType == 'VarExpr' and expr.Variable.IsGlobal then local s = expr.Name local ss = '"'..s..'"' local t = expr.Tokens[1] local c,l = t.Char, t.Line local p = function() return '' end expr.AstType = 'StringExpr' t.Type = 'String' t.Data = ss t.Constant = s t.Print = p expr.Value = { LeadingWhite = {}, Type='String', Data=ss, Constant=s, Char=c, Line=l, Print=p } end stat = emit_opcode(op .. "_relative", expr) break end if opcode_immediate[op] and tok:ConsumeSymbol('#') then local st, expr = ParseExpr(scope) if not st then return false, expr end stat = emit_opcode(op .. "_immediate", expr) break end if (opcode_indirect[op] or opcode_indirect_x[op] or opcode_indirect_y[op]) and tok:ConsumeSymbol('(') then local st, expr = ParseExpr(scope) if not st then return false, expr end if tok:ConsumeSymbol(',', tokenList) then if not opcode_indirect_x[op] or not tok:Get(tokenList).Data == 'x' or not tok:ConsumeSymbol(')') then return false, expr end stat = emit_opcode(op .. "_indirect_x", expr) break elseif not tok:ConsumeSymbol(')', tokenList) then return false, expr else if tok:ConsumeSymbol(',', tokenList) then if not opcode_indirect_y[op] or not tok:Get(tokenList).Data == 'y' then return false, expr end stat = emit_opcode(op .. "_indirect_y", expr) break else if not opcode_indirect[op] then return false, expr end stat = emit_opcode(op .. "_indirect", expr) break end end end if opcode_absolute[op] or opcode_absolute_x[op] or opcode_absolute_y[op] then local st, expr = ParseExpr(scope) if st then if not tok:ConsumeSymbol(',', tokenList) then if not opcode_absolute[op] then return false, expr end stat = emit_opcode(op .. "_absolute", expr) break end if tok:Peek().Data == 'x' then if not opcode_absolute_x[op] then return false, expr end tok:Get(tokenList) stat = emit_opcode(op .. "_absolute_x", expr) break end if tok:Peek().Data == 'y' then if not opcode_absolute_y[op] then return false, expr end tok:Get(tokenList) stat = emit_opcode(op .. "_absolute_x", expr) break end return false, expr end end if opcode_implied[op] then stat = emit_opcode(op .. "_implied") break end end end if stat then -- nothing elseif tok:ConsumeKeyword('if', tokenList) then --setup local nodeIfStat = {} nodeIfStat.AstType = 'IfStatement' nodeIfStat.Clauses = {} --clauses repeat local st, nodeCond = ParseExpr(scope) if not st then return false, nodeCond end if not tok:ConsumeKeyword('then', tokenList) then return false, GenerateError("`then` expected.") end local st, nodeBody = ParseStatementList(scope) if not st then return false, nodeBody end nodeIfStat.Clauses[#nodeIfStat.Clauses+1] = { Condition = nodeCond; Body = nodeBody; } until not tok:ConsumeKeyword('elseif', tokenList) --else clause if tok:ConsumeKeyword('else', tokenList) then local st, nodeBody = ParseStatementList(scope) if not st then return false, nodeBody end nodeIfStat.Clauses[#nodeIfStat.Clauses+1] = { Body = nodeBody; } end --end if not tok:ConsumeKeyword('end', tokenList) then return false, GenerateError("`end` expected.") end nodeIfStat.Tokens = tokenList stat = nodeIfStat elseif tok:ConsumeKeyword('while', tokenList) then --setup local nodeWhileStat = {} nodeWhileStat.AstType = 'WhileStatement' --condition local st, nodeCond = ParseExpr(scope) if not st then return false, nodeCond end --do if not tok:ConsumeKeyword('do', tokenList) then return false, GenerateError("`do` expected.") end --body local st, nodeBody = ParseStatementList(scope) if not st then return false, nodeBody end --end if not tok:ConsumeKeyword('end', tokenList) then return false, GenerateError("`end` expected.") end --return nodeWhileStat.Condition = nodeCond nodeWhileStat.Body = nodeBody nodeWhileStat.Tokens = tokenList stat = nodeWhileStat elseif tok:ConsumeKeyword('do', tokenList) then --do block local st, nodeBlock = ParseStatementList(scope) if not st then return false, nodeBlock end if not tok:ConsumeKeyword('end', tokenList) then return false, GenerateError("`end` expected.") end local nodeDoStat = {} nodeDoStat.AstType = 'DoStatement' nodeDoStat.Body = nodeBlock nodeDoStat.Tokens = tokenList stat = nodeDoStat elseif tok:ConsumeKeyword('for', tokenList) then --for block if not tok:Is('Ident') then return false, GenerateError(" expected.") end local baseVarName = tok:Get(tokenList) if tok:ConsumeSymbol('=', tokenList) then --numeric for local forScope = CreateScope(scope) local forVar = forScope:CreateLocal(baseVarName.Data) -- local st, startEx = ParseExpr(scope) if not st then return false, startEx end if not tok:ConsumeSymbol(',', tokenList) then return false, GenerateError("`,` Expected") end local st, endEx = ParseExpr(scope) if not st then return false, endEx end local st, stepEx; if tok:ConsumeSymbol(',', tokenList) then st, stepEx = ParseExpr(scope) if not st then return false, stepEx end end if not tok:ConsumeKeyword('do', tokenList) then return false, GenerateError("`do` expected") end -- local st, body = ParseStatementList(forScope) if not st then return false, body end if not tok:ConsumeKeyword('end', tokenList) then return false, GenerateError("`end` expected") end -- local nodeFor = {} nodeFor.AstType = 'NumericForStatement' nodeFor.Scope = forScope nodeFor.Variable = forVar nodeFor.Start = startEx nodeFor.End = endEx nodeFor.Step = stepEx nodeFor.Body = body nodeFor.Tokens = tokenList stat = nodeFor else --generic for local forScope = CreateScope(scope) -- local varList = { forScope:CreateLocal(baseVarName.Data) } while tok:ConsumeSymbol(',', tokenList) do if not tok:Is('Ident') then return false, GenerateError("for variable expected.") end varList[#varList+1] = forScope:CreateLocal(tok:Get(tokenList).Data) end if not tok:ConsumeKeyword('in', tokenList) then return false, GenerateError("`in` expected.") end local generators = {} local st, firstGenerator = ParseExpr(scope) if not st then return false, firstGenerator end generators[#generators+1] = firstGenerator while tok:ConsumeSymbol(',', tokenList) do local st, gen = ParseExpr(scope) if not st then return false, gen end generators[#generators+1] = gen end if not tok:ConsumeKeyword('do', tokenList) then return false, GenerateError("`do` expected.") end local st, body = ParseStatementList(forScope) if not st then return false, body end if not tok:ConsumeKeyword('end', tokenList) then return false, GenerateError("`end` expected.") end -- local nodeFor = {} nodeFor.AstType = 'GenericForStatement' nodeFor.Scope = forScope nodeFor.VariableList = varList nodeFor.Generators = generators nodeFor.Body = body nodeFor.Tokens = tokenList stat = nodeFor end elseif tok:ConsumeKeyword('repeat', tokenList) then local st, body = ParseStatementList(scope) if not st then return false, body end -- if not tok:ConsumeKeyword('until', tokenList) then return false, GenerateError("`until` expected.") end -- FIX: Used to parse in parent scope -- Now parses in repeat scope local st, cond = ParseExpr(body.Scope) if not st then return false, cond end -- local nodeRepeat = {} nodeRepeat.AstType = 'RepeatStatement' nodeRepeat.Condition = cond nodeRepeat.Body = body nodeRepeat.Tokens = tokenList stat = nodeRepeat elseif tok:ConsumeKeyword('function', tokenList) then if not tok:Is('Ident') then return false, GenerateError("Function name expected") end local st, name = ParseSuffixedExpr(scope, true) --true => only dots and colons if not st then return false, name end -- local st, func = ParseFunctionArgsAndBody(scope, tokenList) if not st then return false, func end -- func.IsLocal = false func.Name = name stat = func elseif tok:ConsumeKeyword('local', tokenList) then if tok:Is('Ident') then local varList = { tok:Get(tokenList).Data } while tok:ConsumeSymbol(',', tokenList) do if not tok:Is('Ident') then return false, GenerateError("local var name expected") end varList[#varList+1] = tok:Get(tokenList).Data end local initList = {} if tok:ConsumeSymbol('=', tokenList) then repeat local st, ex = ParseExpr(scope) if not st then return false, ex end initList[#initList+1] = ex until not tok:ConsumeSymbol(',', tokenList) end --now patch var list --we can't do this before getting the init list, because the init list does not --have the locals themselves in scope. for i, v in pairs(varList) do varList[i] = scope:CreateLocal(v) end local nodeLocal = {} nodeLocal.AstType = 'LocalStatement' nodeLocal.LocalList = varList nodeLocal.InitList = initList nodeLocal.Tokens = tokenList -- stat = nodeLocal elseif tok:ConsumeKeyword('function', tokenList) then if not tok:Is('Ident') then return false, GenerateError("Function name expected") end local name = tok:Get(tokenList).Data local localVar = scope:CreateLocal(name) -- local st, func = ParseFunctionArgsAndBody(scope, tokenList) if not st then return false, func end -- func.Name = localVar func.IsLocal = true stat = func else return false, GenerateError("local var or function def expected") end elseif tok:ConsumeSymbol('::', tokenList) then if not tok:Is('Ident') then return false, GenerateError('Label name expected') end local label = tok:Get(tokenList).Data if not tok:ConsumeSymbol('::', tokenList) then return false, GenerateError("`::` expected") end local nodeLabel = {} nodeLabel.AstType = 'LabelStatement' nodeLabel.Label = label nodeLabel.Tokens = tokenList stat = nodeLabel elseif tok:ConsumeKeyword('return', tokenList) then local exList = {} if not tok:IsKeyword('end') then local st, firstEx = ParseExpr(scope) if st then exList[1] = firstEx while tok:ConsumeSymbol(',', tokenList) do local st, ex = ParseExpr(scope) if not st then return false, ex end exList[#exList+1] = ex end end end local nodeReturn = {} nodeReturn.AstType = 'ReturnStatement' nodeReturn.Arguments = exList nodeReturn.Tokens = tokenList stat = nodeReturn elseif tok:ConsumeKeyword('break', tokenList) then local nodeBreak = {} nodeBreak.AstType = 'BreakStatement' nodeBreak.Tokens = tokenList stat = nodeBreak elseif tok:ConsumeKeyword('goto', tokenList) then if not tok:Is('Ident') then return false, GenerateError("Label expected") end local label = tok:Get(tokenList).Data local nodeGoto = {} nodeGoto.AstType = 'GotoStatement' nodeGoto.Label = label nodeGoto.Tokens = tokenList stat = nodeGoto else --statementParseExpr local st, suffixed = ParseSuffixedExpr(scope) if not st then return false, suffixed end --assignment or call? if tok:IsSymbol(',') or tok:IsSymbol('=') then --check that it was not parenthesized, making it not an lvalue if (suffixed.ParenCount or 0) > 0 then return false, GenerateError("Can not assign to parenthesized expression, is not an lvalue") end --more processing needed local lhs = { suffixed } while tok:ConsumeSymbol(',', tokenList) do local st, lhsPart = ParseSuffixedExpr(scope) if not st then return false, lhsPart end lhs[#lhs+1] = lhsPart end --equals if not tok:ConsumeSymbol('=', tokenList) then return false, GenerateError("`=` Expected.") end --rhs local rhs = {} local st, firstRhs = ParseExpr(scope) if not st then return false, firstRhs end rhs[1] = firstRhs while tok:ConsumeSymbol(',', tokenList) do local st, rhsPart = ParseExpr(scope) if not st then return false, rhsPart end rhs[#rhs+1] = rhsPart end --done local nodeAssign = {} nodeAssign.AstType = 'AssignmentStatement' nodeAssign.Lhs = lhs nodeAssign.Rhs = rhs nodeAssign.Tokens = tokenList stat = nodeAssign elseif suffixed.AstType == 'CallExpr' or suffixed.AstType == 'TableCallExpr' or suffixed.AstType == 'StringCallExpr' then --it's a call statement local nodeCall = {} nodeCall.AstType = 'CallStatement' nodeCall.Expression = suffixed nodeCall.Tokens = tokenList stat = nodeCall else return false, GenerateError("Assignment Statement Expected") end end if tok:IsSymbol(';') then stat.Semicolon = tok:Get( stat.Tokens ) end return true, stat end local statListCloseKeywords = lookupify{'end', 'else', 'elseif', 'until'} ParseStatementList = function(scope) local nodeStatlist = {} nodeStatlist.Scope = CreateScope(scope) nodeStatlist.AstType = 'Statlist' nodeStatlist.Body = { } nodeStatlist.Tokens = { } -- --local stats = {} -- while not statListCloseKeywords[tok:Peek().Data] and not tok:IsEof() do local st, nodeStatement = ParseStatement(nodeStatlist.Scope) if not st then return false, nodeStatement end --stats[#stats+1] = nodeStatement nodeStatlist.Body[#nodeStatlist.Body + 1] = nodeStatement end if tok:IsEof() then local nodeEof = {} nodeEof.AstType = 'Eof' nodeEof.Tokens = { tok:Get() } nodeStatlist.Body[#nodeStatlist.Body + 1] = nodeEof end -- --nodeStatlist.Body = stats return true, nodeStatlist end local function mainfunc() local topScope = CreateScope() return ParseStatementList(topScope) end local st, main = mainfunc() return st, main end local function Format65(ast) local function splitLines(str) if str:match("\n") then local lines = {} for line in str:gmatch("[^\n]*") do table.insert(lines, line) end assert(#lines > 0) return lines else return { str } end end local formatStatlist, formatExpr local out = { rope = {}, -- List of strings line = 1, char = 1, appendStr = function(self, str) table.insert(self.rope, str) local lines = splitLines(str) if #lines == 1 then self.char = self.char + #str else self.line = self.line + #lines - 1 local lastLine = lines[#lines] self.char = #lastLine end end, appendToken = function(self, token) self:appendWhite(token) self:appendStr(token.Data) end, appendTokens = function(self, tokens) for _,token in ipairs(tokens) do self:appendToken( token ) end end, appendWhite = function(self, token) if token.LeadingWhite then self:appendTokens( token.LeadingWhite ) end end } formatExpr = function(expr) local tok_it = 1 local function appendNextToken(str) local tok = expr.Tokens[tok_it]; if str and tok.Data ~= str then error("Expected token '" .. str .. "'.") end out:appendToken( tok ) tok_it = tok_it + 1 end local function appendToken(token) out:appendToken( token ) tok_it = tok_it + 1 end local function appendWhite() local tok = expr.Tokens[tok_it]; if not tok then error("Missing token") end out:appendWhite( tok ) tok_it = tok_it + 1 end local function appendStr(str) appendWhite() out:appendStr(str) end local function peek() if tok_it < #expr.Tokens then return expr.Tokens[tok_it].Data end end local function appendComma(mandatory, seperators) if true then seperators = seperators or { "," } seperators = lookupify( seperators ) if not mandatory and not seperators[peek()] then return end assert(seperators[peek()], "Missing comma or semicolon") appendNextToken() else local p = peek() if p == "," or p == ";" then appendNextToken() end end end if expr.AstType == 'VarExpr' then if expr.Variable then appendStr( expr.Variable.Name ) else appendStr( expr.Name ) end elseif expr.AstType == 'NumberExpr' then appendToken( expr.Value ) elseif expr.AstType == 'StringExpr' then appendToken( expr.Value ) elseif expr.AstType == 'BooleanExpr' then appendNextToken( expr.Value and "true" or "false" ) elseif expr.AstType == 'NilExpr' then appendNextToken( "nil" ) elseif expr.AstType == 'BinopExpr' then formatExpr(expr.Lhs) appendStr( expr.Op ) formatExpr(expr.Rhs) elseif expr.AstType == 'UnopExpr' then appendStr( expr.Op ) formatExpr(expr.Rhs) elseif expr.AstType == 'DotsExpr' then appendNextToken( "..." ) elseif expr.AstType == 'CallExpr' then formatExpr(expr.Base) appendNextToken( "(" ) for i,arg in ipairs( expr.Arguments ) do formatExpr(arg) appendComma( i ~= #expr.Arguments ) end appendNextToken( ")" ) elseif expr.AstType == 'TableCallExpr' then formatExpr( expr.Base ) formatExpr( expr.Arguments[1] ) elseif expr.AstType == 'StringCallExpr' then formatExpr(expr.Base) appendToken( expr.Arguments[1] ) elseif expr.AstType == 'IndexExpr' then formatExpr(expr.Base) appendNextToken( "[" ) formatExpr(expr.Index) appendNextToken( "]" ) elseif expr.AstType == 'MemberExpr' then formatExpr(expr.Base) appendNextToken() -- . or : appendToken(expr.Ident) elseif expr.AstType == 'Function' then -- anonymous function appendNextToken( "function" ) appendNextToken( "(" ) if #expr.Arguments > 0 then for i = 1, #expr.Arguments do appendStr( expr.Arguments[i].Name ) if i ~= #expr.Arguments then appendNextToken(",") elseif expr.VarArg then appendNextToken(",") appendNextToken("...") end end elseif expr.VarArg then appendNextToken("...") end appendNextToken(")") formatStatlist(expr.Body) appendNextToken("end") elseif expr.AstType == 'ConstructorExpr' then appendNextToken( "{" ) for i = 1, #expr.EntryList do local entry = expr.EntryList[i] if entry.Type == 'Key' then appendNextToken( "[" ) formatExpr(entry.Key) appendNextToken( "]" ) appendNextToken( "=" ) formatExpr(entry.Value) elseif entry.Type == 'Value' then formatExpr(entry.Value) elseif entry.Type == 'KeyString' then appendStr(entry.Key) appendNextToken( "=" ) formatExpr(entry.Value) end appendComma( i ~= #expr.EntryList, { ",", ";" } ) end appendNextToken( "}" ) elseif expr.AstType == 'Parentheses' then appendNextToken( "(" ) formatExpr(expr.Inner) appendNextToken( ")" ) else print("Unknown AST Type: ", statement.AstType) end assert(tok_it == #expr.Tokens + 1) end local formatStatement = function(statement) local tok_it = 1 local function appendNextToken(str) local tok = statement.Tokens[tok_it]; assert(tok, string.format("Not enough tokens for %q. First token at %i:%i", str, statement.Tokens[1].Line, statement.Tokens[1].Char)) assert(tok.Data == str, string.format('Expected token %q, got %q', str, tok.Data)) out:appendToken( tok ) tok_it = tok_it + 1 end local function appendToken(token) out:appendToken( str ) tok_it = tok_it + 1 end local function appendWhite() local tok = statement.Tokens[tok_it]; out:appendWhite( tok ) tok_it = tok_it + 1 end local function appendStr(str) appendWhite() out:appendStr(str) end local function appendComma(mandatory) if mandatory or (tok_it < #statement.Tokens and statement.Tokens[tok_it].Data == ",") then appendNextToken( "," ) end end if statement.AstType == 'AssignmentStatement' then for i,v in ipairs(statement.Lhs) do formatExpr(v) appendComma( i ~= #statement.Lhs ) end if #statement.Rhs > 0 then appendNextToken( "=" ) for i,v in ipairs(statement.Rhs) do formatExpr(v) appendComma( i ~= #statement.Rhs ) end end elseif statement.AstType == 'CallStatement' then formatExpr(statement.Expression) elseif statement.AstType == 'LocalStatement' then appendNextToken( "local" ) for i = 1, #statement.LocalList do appendStr( statement.LocalList[i].Name ) appendComma( i ~= #statement.LocalList ) end if #statement.InitList > 0 then appendNextToken( "=" ) for i = 1, #statement.InitList do formatExpr(statement.InitList[i]) appendComma( i ~= #statement.InitList ) end end elseif statement.AstType == 'IfStatement' then appendNextToken( "if" ) formatExpr( statement.Clauses[1].Condition ) appendNextToken( "then" ) formatStatlist( statement.Clauses[1].Body ) for i = 2, #statement.Clauses do local st = statement.Clauses[i] if st.Condition then appendNextToken( "elseif" ) formatExpr(st.Condition) appendNextToken( "then" ) else appendNextToken( "else" ) end formatStatlist(st.Body) end appendNextToken( "end" ) elseif statement.AstType == 'WhileStatement' then appendNextToken( "while" ) formatExpr(statement.Condition) appendNextToken( "do" ) formatStatlist(statement.Body) appendNextToken( "end" ) elseif statement.AstType == 'DoStatement' then appendNextToken( "do" ) formatStatlist(statement.Body) appendNextToken( "end" ) elseif statement.AstType == 'ReturnStatement' then appendNextToken( "return" ) for i = 1, #statement.Arguments do formatExpr(statement.Arguments[i]) appendComma( i ~= #statement.Arguments ) end elseif statement.AstType == 'BreakStatement' then appendNextToken( "break" ) elseif statement.AstType == 'RepeatStatement' then appendNextToken( "repeat" ) formatStatlist(statement.Body) appendNextToken( "until" ) formatExpr(statement.Condition) elseif statement.AstType == 'Function' then if statement.IsLocal then appendNextToken( "local" ) end appendNextToken( "function" ) if statement.IsLocal then appendStr(statement.Name.Name) else formatExpr(statement.Name) end appendNextToken( "(" ) if #statement.Arguments > 0 then for i = 1, #statement.Arguments do appendStr( statement.Arguments[i].Name ) appendComma( i ~= #statement.Arguments or statement.VarArg ) if i == #statement.Arguments and statement.VarArg then appendNextToken( "..." ) end end elseif statement.VarArg then appendNextToken( "..." ) end appendNextToken( ")" ) formatStatlist(statement.Body) appendNextToken( "end" ) elseif statement.AstType == 'GenericForStatement' then appendNextToken( "for" ) for i = 1, #statement.VariableList do appendStr( statement.VariableList[i].Name ) appendComma( i ~= #statement.VariableList ) end appendNextToken( "in" ) for i = 1, #statement.Generators do formatExpr(statement.Generators[i]) appendComma( i ~= #statement.Generators ) end appendNextToken( "do" ) formatStatlist(statement.Body) appendNextToken( "end" ) elseif statement.AstType == 'NumericForStatement' then appendNextToken( "for" ) appendStr( statement.Variable.Name ) appendNextToken( "=" ) formatExpr(statement.Start) appendNextToken( "," ) formatExpr(statement.End) if statement.Step then appendNextToken( "," ) formatExpr(statement.Step) end appendNextToken( "do" ) formatStatlist(statement.Body) appendNextToken( "end" ) elseif statement.AstType == 'LabelStatement' then appendNextToken( "::" ) appendStr( statement.Label ) appendNextToken( "::" ) elseif statement.AstType == 'GotoStatement' then appendNextToken( "goto" ) appendStr( statement.Label ) elseif statement.AstType == 'Eof' then appendWhite() else print("Unknown AST Type: ", statement.AstType) end if statement.Semicolon then appendNextToken(";") end assert(tok_it == #statement.Tokens + 1) end formatStatlist = function(statList) for _, stat in ipairs(statList.Body) do formatStatement(stat) end end formatStatlist(ast) return table.concat(out.rope) end local function splitFilename(name) if name:find(".") then local p, ext = name:match("()%.([^%.]*)$") if p and ext then if #ext == 0 then return name, nil else local filename = name:sub(1,p-1) return filename, ext end else return name, nil end else return name, nil end end if #arg == 1 then local name, ext = splitFilename(arg[1]) local outname = name.."_min" if ext then outname = outname.."."..ext end -- local inf = io.open(arg[1], 'r') if not inf then print("Failed to open '"..arg[1].."' for reading") return end -- local sourceText = inf:read('*all') inf:close() -- local st, ast = ParseLua(sourceText) if not st then --we failed to parse the file, show why print(ast) return end -- local outf = io.open(outname, 'w') if not outf then print("Failed to open '"..outname.."' for writing") return end -- outf:write(Format65(ast)) outf:close() -- elseif #arg == 2 then --keep the user from accidentally overwriting their non-minified file with if arg[1]:find("_min") then print("Did you mix up the argument order?\n".. "Current command will minify '"..arg[1].."' and OVERWRITE '"..arg[2].."' with the results") while true do io.write("Confirm (yes/cancel): ") local msg = io.read('*line') if msg == 'yes' then break elseif msg == 'cancel' then return end end end local inf = io.open(arg[1], 'r') if not inf then print("Failed to open '"..arg[1].."' for reading") return end -- local sourceText = inf:read('*all') inf:close() -- local st, ast = ParseLua(sourceText) if not st then --we failed to parse the file, show why print(ast) return end -- if arg[1] == arg[2] then print("Are you SURE you want to overwrite the source file?") while true do io.write("Confirm (yes/cancel): ") local msg = io.read('*line') if msg == 'yes' then break elseif msg == 'cancel' then return end end end local outf = io.open(arg[2], 'w') if not outf then print("Failed to open '"..arg[2].."' for writing") return end -- outf:write(Format65(ast)) outf:close() -- else print("Invalid arguments, usage:\nl65 source [destination]") end