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Author SHA1 Message Date
c8cae03604 syntax: 'var'->'let' 'function'->'func'
- 'var' has some weird scoping connotations with users of JS. better to change it to 'let', which will decide whether to make the variable a local or a global
- 'func' looks visually appealing lol
- some minor refactoring done in cparse.c
2023-02-09 15:58:25 -06:00
5d805e258b minor formatting fixes 2023-02-09 12:52:36 -06:00
8df4cc65e3 removed CObjStream 2023-02-09 12:42:09 -06:00
22 changed files with 98 additions and 136 deletions

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@ -5,31 +5,31 @@ Cosmo is a portable scripting language loosely based off of Lua. Cosmo easily al
```lua
proto Vector
function __init(self)
func __init(self)
self.vector = []
self.x = 0
end
function __index(self, key)
func __index(self, key)
return self.vector[key]
end
function push(self, val)
func push(self, val)
self.vector[self.x++] = val
end
function pop(self)
func pop(self)
return self.vector[--self.x]
end
end
var vector = Vector()
let vector = Vector()
for (var i = 0; i < 4; i++) do
for (let i = 0; i < 4; i++) do
vector:push(i)
end
for (var i = 0; i < 4; i++) do
for (let i = 0; i < 4; i++) do
print(vector:pop() .. " : " .. vector[i])
end
```

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@ -1,8 +1,8 @@
// just testing continues and breaks
for (var x = 0; x < 700; x++) do
for (var i = 0; true; i++) do
var str = i .. "." .. x
for (let x = 0; x < 700; x++) do
for (let i = 0; true; i++) do
let str = i .. "." .. x
if (i == 998) then
print(i .. " reached")
break // exits the loop
@ -13,9 +13,9 @@ for (var x = 0; x < 700; x++) do
end
// same example as the for loop but done manually using a while loop
var i = 0
let i = 0
while true do
var str = i .. "." .. x
let str = i .. "." .. x
if (i++ == 998) then
print("done")
break

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@ -1,20 +1,20 @@
var strtable = []
var strLen = 4 // length of all strings to generate
var AByte = "A":byte() // grabs the ascii value of 'A'
let strtable = []
let strLen = 4 // length of all strings to generate
let AByte = "A":byte() // grabs the ascii value of 'A'
proto stringBuilder
function __init(self, length)
func __init(self, length)
self.len = length
end
// we are the iterator object lol
function __iter(self)
func __iter(self)
self.x = 0
return self
end
function __next(self)
var x = self.x++
func __next(self)
let x = self.x++
// if we've generated all the possible strings, return nil ending the loop
if x >= 26 ^ self.len then
@ -22,8 +22,8 @@ proto stringBuilder
end
// generate the string
var str = ""
for (var i = 0; i < self.len; i++) do
let str = ""
for (let i = 0; i < self.len; i++) do
str = string.char(AByte + (x % 26)) .. str
x = math.floor(x / 26)

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@ -1,4 +1,4 @@
local function fib(num)
local func fib(num)
if num <= 1 then
return num
else
@ -6,6 +6,6 @@ local function fib(num)
end
end
for (var i = 1; i < 40; i++) do
for (let i = 1; i < 40; i++) do
print("The fib number of " .. i .. " is " .. fib(i))
end

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@ -1,4 +1,4 @@
var object = {
let object = {
__setter = [
"field1" = function(self, val)
print("setter for field1 called!")

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@ -1,22 +1,22 @@
proto Vector
function __init(self)
func __init(self)
self.vector = []
self.x = 0
end
function push(self, val)
func push(self, val)
self.vector[self.x++] = val
end
function pop(self)
func pop(self)
return self.vector[--self.x]
end
function __index(self, key)
func __index(self, key)
return self.vector[key]
end
function __iter(self)
func __iter(self)
// you don't *have* to make a new object, i just wanted to show off anonymous functions
return {__next = (function(self)
return self.vector[self.iterIndex++]
@ -27,9 +27,9 @@ proto Vector
end
end
var vector = Vector()
let vector = Vector()
for (var i = 0; i < 100000; i++) do
for (let i = 0; i < 100000; i++) do
vector:push(i)
end

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@ -1,14 +1,14 @@
proto Range
function __init(self, x)
func __init(self, x)
self.max = x
end
function __iter(self)
func __iter(self)
self.i = 0
return self
end
function __next(self)
func __next(self)
if self.i >= self.max then
return nil // exit iterator loop
end

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@ -1,15 +1,15 @@
proto Test
function __init(self, x)
func __init(self, x)
self.x = x
end
function print(self)
func print(self)
print(self.x)
end
end
// stressing the GC
for (var i = 0; i < 100000; i++) do
var x = Test("Hello world " .. i)
for (let i = 0; i < 100000; i++) do
let x = Test("Hello world " .. i)
x:print()
end

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@ -1,7 +1,7 @@
var words = "hello world! this is a sentence with words separated by space":split(" ")
let words = "hello world! this is a sentence with words separated by space":split(" ")
var str = ""
for (var i = 0; i < #words; i++) do
let str = ""
for (let i = 0; i < #words; i++) do
str = str .. words[i]
print(words[i])
end

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@ -1,10 +1,10 @@
// crafts a dummy proto
proto test
function __init(self) end
func __init(self) end
end
// instance of test
var obj = test()
let obj = test()
test.__index = function(self, key)
print("__index called!")

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@ -7,7 +7,7 @@ print("starting Testsuite...")
// tests the string.* library
assert("Hello world!":sub(6) == "world!", "string.sub() failed!")
assert("A":rep(6) == "AAAAAA", "string.red() failed!")
assert("A":rep(6) == "AAAAAA", "string.rep() failed!")
// tests some basic PEMDAS arithmetic
@ -17,16 +17,16 @@ assert(2 / 5 + 3 / 5 == 1, "PEMDAS check #2 failed!")
// iterator test
proto Range
function __init(self, x)
func __init(self, x)
self.max = x
end
function __iter(self)
func __iter(self)
self.i = 0
return self
end
function __next(self)
func __next(self)
if self.i >= self.max then
return nil // exit iterator loop
end
@ -35,7 +35,7 @@ proto Range
end
end
var total = 0
let total = 0
for i in Range(100) do
total = total + i
end

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@ -1,27 +1,27 @@
proto test
function __init(self, x)
func __init(self, x)
self:setArg(x)
end
function __tostring(self)
var total = 1
func __tostring(self)
let total = 1
for (var i = self.x; i > 0; i = i - 1) do
for (let i = self.x; i > 0; i = i - 1) do
total = total * i;
end
return "The factorial of " .. self.x .. " is " .. total
end
function setArg(self, x)
func setArg(self, x)
self.x = x
end
end
var t = test(1)
let t = test(1)
for (var x = 1; x < 1000; x = x + 1) do
for (var i = 1; i < 100; i = i + 1) do
for (let x = 1; x < 1000; x = x + 1) do
for (let i = 1; i < 100; i = i + 1) do
t:setArg(i)
print(t)

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@ -1,5 +1,5 @@
// adds all args passed (expects numbers)
function add(start, ...args)
func add(start, ...args)
// starting at `start`, add up all numbers passed
local total = start
for val in args do

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@ -9,7 +9,6 @@
#include <sys/time.h>
// ================================================================ [BASELIB]
// ================================================================
int cosmoB_print(CState *state, int nargs, CValue *args)
{
@ -164,7 +163,6 @@ void cosmoB_loadLibrary(CState *state)
}
// ================================================================ [OBJECT.*]
// ================================================================
int cosmoB_osetProto(CState *state, int nargs, CValue *args)
{
@ -255,7 +253,6 @@ COSMO_API void cosmoB_loadObjLib(CState *state)
}
// ================================================================ [OS.*]
// ================================================================
// os.read()
int cosmoB_osRead(CState *state, int nargs, CValue *args)
@ -353,7 +350,6 @@ COSMO_API void cosmoB_loadOSLib(CState *state)
}
// ================================================================ [STRING.*]
// ================================================================
// string.sub
int cosmoB_sSub(CState *state, int nargs, CValue *args)
@ -629,7 +625,6 @@ void cosmoB_loadStrLib(CState *state)
}
// ================================================================ [MATH]
// ================================================================
// math.abs
int cosmoB_mAbs(CState *state, int nargs, CValue *args)
@ -847,7 +842,6 @@ void cosmoB_loadMathLib(CState *state)
}
// ================================================================ [VM.*]
// ================================================================
// vm.__getter["globals"]
int cosmoB_vgetGlobal(CState *state, int nargs, CValue *args)

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@ -56,7 +56,6 @@ int addConstant(CState *state, CChunk *chunk, CValue value)
}
// ================================================================ [WRITE TO CHUNK]
// ================================================================
void writeu8Chunk(CState *state, CChunk *chunk, INSTRUCTION i, int line)
{
@ -71,8 +70,8 @@ void writeu8Chunk(CState *state, CChunk *chunk, INSTRUCTION i, int line)
void writeu16Chunk(CState *state, CChunk *chunk, uint16_t i, int line)
{
static const int sz = sizeof(uint16_t) / sizeof(INSTRUCTION);
INSTRUCTION *buffer = (INSTRUCTION *)(&i);
int sz = sizeof(uint16_t) / sizeof(INSTRUCTION);
for (int i = 0; i < sz; i++) {
writeu8Chunk(state, chunk, buffer[i], line);

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@ -14,7 +14,7 @@ CReservedWord reservedWords[] = {
{ TOKEN_END, "end", 3},
{ TOKEN_FALSE, "false", 5},
{ TOKEN_FOR, "for", 3},
{TOKEN_FUNCTION, "function", 8},
{ TOKEN_FUNC, "func", 4},
{ TOKEN_IF, "if", 2},
{ TOKEN_IN, "in", 2},
{ TOKEN_LOCAL, "local", 5},
@ -25,7 +25,7 @@ CReservedWord reservedWords[] = {
{ TOKEN_RETURN, "return", 6},
{ TOKEN_THEN, "then", 4},
{ TOKEN_TRUE, "true", 4},
{ TOKEN_VAR, "var", 3},
{ TOKEN_LET, "let", 3},
{ TOKEN_WHILE, "while", 5}
};

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@ -57,7 +57,7 @@ typedef enum
TOKEN_ELSEIF,
TOKEN_END,
TOKEN_FOR,
TOKEN_FUNCTION,
TOKEN_FUNC,
TOKEN_PROTO,
TOKEN_IF,
TOKEN_IN,
@ -66,7 +66,7 @@ typedef enum
TOKEN_OR,
TOKEN_RETURN,
TOKEN_THEN,
TOKEN_VAR,
TOKEN_LET,
TOKEN_WHILE,
TOKEN_ERROR,

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@ -59,12 +59,6 @@ void cosmoO_free(CState *state, CObj *obj)
cosmoM_free(state, CObjObject, objTbl);
break;
}
case COBJ_STREAM: {
CObjStream *objStrm = (CObjStream *)obj;
close(objStrm->fd);
cosmoM_free(state, CObjStream, objStrm);
break;
}
case COBJ_TABLE: {
CObjTable *tbl = (CObjTable *)obj;
cosmoT_clearTable(state, &tbl->tbl);
@ -204,14 +198,6 @@ CObjObject *cosmoO_newObject(CState *state)
return obj;
}
CObjStream *cosmoO_newStream(CState *state, int fd)
{
CObjStream *strm = (CObjStream *)cosmoO_allocateBase(state, sizeof(CObjStream), COBJ_STREAM);
strm->fd = fd;
return strm;
}
CObjTable *cosmoO_newTable(CState *state)
{
CObjTable *obj = (CObjTable *)cosmoO_allocateBase(state, sizeof(CObjTable), COBJ_TABLE);

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@ -48,12 +48,6 @@ struct CObjString
bool isIString;
};
struct CObjStream
{
CommonHeader; // "is a" CObj
int fd; // handle to file descriptor, on POSIX compliant OSes this can also be a socket :pog:
};
struct CObjError
{
CommonHeader; // "is a" CObj
@ -138,7 +132,6 @@ struct CObjUpval
#define cosmoV_readString(x) ((CObjString *)cosmoV_readRef(x))
#define cosmoV_readCString(x) (((CObjString *)cosmoV_readRef(x))->str)
#define cosmoV_readFD(x) (((CObjStream *)cosmoV_readRef(x))->fd)
#define cosmoV_readObject(x) ((CObjObject *)cosmoV_readRef(x))
#define cosmoV_readTable(x) ((CObjTable *)cosmoV_readRef(x))
#define cosmoV_readFunction(x) ((CObjFunction *)cosmoV_readRef(x))
@ -166,7 +159,6 @@ bool cosmoO_equal(CState *state, CObj *obj1, CObj *obj2);
bool cosmoO_isDescendant(CObj *obj, CObjObject *proto);
CObjObject *cosmoO_newObject(CState *state);
CObjStream *cosmoO_newStream(CState *state, int fd);
CObjTable *cosmoO_newTable(CState *state);
CObjFunction *cosmoO_newFunction(CState *state);
CObjCFunction *cosmoO_newCFunction(CState *state, CosmoCFunction func);

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@ -34,7 +34,6 @@ typedef uint32_t cosmo_Flag;
// objs
typedef struct CObj CObj;
typedef struct CObjObject CObjObject;
typedef struct CObjStream CObjStream;
typedef struct CObjString CObjString;
typedef struct CObjUpval CObjUpval;
typedef struct CObjFunction CObjFunction;

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@ -102,13 +102,12 @@ static int expressionPrecedence(CParseState *pstate, int needed, Precedence prec
static int expression(CParseState *pstate, int needed, bool forceNeeded);
static void statement(CParseState *pstate);
static void declaration(CParseState *pstate);
static void function(CParseState *pstate, FunctionType type);
static void parseFunction(CParseState *pstate, FunctionType type);
static void expressionStatement(CParseState *pstate);
static ParseRule *getRule(CTokenType type);
static CObjFunction *endCompiler(CParseState *pstate);
// ================================================================ [FRONT END/TALK TO LEXER]
// ================================================================
static void initCompilerState(CParseState *pstate, CCompilerState *ccstate, FunctionType type,
CCompilerState *enclosing)
@ -269,7 +268,6 @@ static bool blockFollow(CToken token)
}
// ================================================================ [WRITE TO CHUNK]
// ================================================================
CChunk *getChunk(CParseState *pstate)
{
@ -460,7 +458,6 @@ static bool isLast(CParseState *pstate, Precedence pType)
}
// ================================================================ [PARSER]
// ================================================================
static void number(CParseState *pstate, bool canAssign, Precedence prec)
{
@ -593,36 +590,40 @@ static void group(CParseState *pstate, bool canAssign, Precedence prec)
consume(pstate, TOKEN_RIGHT_PAREN, "Expected ')'");
}
static void _etterOP(CParseState *pstate, uint8_t op, int arg)
#define WRITE_GLOBAL_OP(pstate, op, arg)
static void _etterAB(CParseState *pstate, uint8_t a, int b, bool isGlobal)
{
writeu8(pstate, op);
if (op == OP_GETGLOBAL || op == OP_SETGLOBAL) // globals are stored with a u16
writeu16(pstate, arg);
writeu8(pstate, a);
if (isGlobal) // globals are stored with a u16
writeu16(pstate, b);
else
writeu8(pstate, arg);
writeu8(pstate, b);
}
static void namedVariable(CParseState *pstate, CToken name, bool canAssign, bool canIncrement,
int expectedValues)
{
uint8_t opGet, opSet, inc;
uint8_t opGet, opSet, opInc;
bool isGlobal = false;
int arg = getLocal(pstate->compiler, &name);
if (arg != -1) {
// we found it in out local table!
// we found it in our local table!
opGet = OP_GETLOCAL;
opSet = OP_SETLOCAL;
inc = OP_INCLOCAL;
opInc = OP_INCLOCAL;
} else if ((arg = getUpvalue(pstate, pstate->compiler, &name)) != -1) {
opGet = OP_GETUPVAL;
opSet = OP_SETUPVAL;
inc = OP_INCUPVAL;
opInc = OP_INCUPVAL;
} else {
// local & upvalue wasn't found, assume it's a global!
arg = identifierConstant(pstate, &name);
opGet = OP_GETGLOBAL;
opSet = OP_SETGLOBAL;
inc = OP_INCGLOBAL;
opInc = OP_INCGLOBAL;
isGlobal = true;
}
if (canAssign && match(pstate, TOKEN_COMMA)) {
@ -631,7 +632,7 @@ static void namedVariable(CParseState *pstate, CToken name, bool canAssign, bool
consume(pstate, TOKEN_IDENTIFIER, "Expected another identifer!");
namedVariable(pstate, pstate->previous, true, false, expectedValues);
_etterOP(pstate, opSet, arg);
_etterAB(pstate, opSet, arg, isGlobal);
valuePopped(pstate, 1);
} else if (canAssign && match(pstate, TOKEN_EQUAL)) {
expectedValues++;
@ -654,29 +655,21 @@ static void namedVariable(CParseState *pstate, CToken name, bool canAssign, bool
writeu8(pstate, OP_NIL);
}
_etterOP(pstate, opSet, arg);
_etterAB(pstate, opSet, arg, isGlobal);
valuePopped(pstate, 1);
} else if (canIncrement && match(pstate, TOKEN_PLUS_PLUS)) { // i++
// now we increment the value
writeu8(pstate, inc);
writeu8(pstate, 128 + 1); // setting signed values in an unsigned int
if (inc == OP_INCGLOBAL) // globals are stored with a u16
writeu16(pstate, arg);
else
writeu8(pstate, arg);
writeu8(pstate, opInc);
_etterAB(pstate, 128 + 1, arg, isGlobal); // As B(x?)
valuePushed(pstate, 1);
} else if (canIncrement && match(pstate, TOKEN_MINUS_MINUS)) { // i--
// now we increment the value
writeu8(pstate, inc);
writeu8(pstate, 128 - 1); // setting signed values in an unsigned int
if (inc == OP_INCGLOBAL) // globals are stored with a u16
writeu16(pstate, arg);
else
writeu8(pstate, arg);
writeu8(pstate, opInc);
_etterAB(pstate, 128 - 1, arg, isGlobal); // As B(x?)
valuePushed(pstate, 1);
} else {
// getter
_etterOP(pstate, opGet, arg);
_etterAB(pstate, opGet, arg, isGlobal);
valuePushed(pstate, 1);
}
}
@ -708,7 +701,7 @@ static void or_(CParseState *pstate, bool canAssign, Precedence prec)
static void anonFunction(CParseState *pstate, bool canAssign, Precedence prec)
{
function(pstate, FTYPE_FUNCTION);
parseFunction(pstate, FTYPE_FUNCTION);
}
static void variable(CParseState *pstate, bool canAssign, Precedence prec)
@ -1082,7 +1075,7 @@ ParseRule ruleTable[] = {
[TOKEN_ELSEIF] = {NULL, NULL, PREC_NONE},
[TOKEN_END] = {NULL, NULL, PREC_NONE},
[TOKEN_FOR] = {NULL, NULL, PREC_NONE},
[TOKEN_FUNCTION] = {anonFunction, NULL, PREC_NONE},
[TOKEN_FUNC] = {anonFunction, NULL, PREC_NONE},
[TOKEN_PROTO] = {NULL, NULL, PREC_NONE},
[TOKEN_IF] = {NULL, NULL, PREC_NONE},
[TOKEN_IN] = {NULL, NULL, PREC_NONE},
@ -1093,7 +1086,7 @@ ParseRule ruleTable[] = {
[TOKEN_THEN] = {NULL, NULL, PREC_NONE},
[TOKEN_WHILE] = {NULL, NULL, PREC_NONE},
[TOKEN_ERROR] = {NULL, NULL, PREC_NONE},
[TOKEN_VAR] = {NULL, NULL, PREC_NONE},
[TOKEN_LET] = {NULL, NULL, PREC_NONE},
[TOKEN_EOF] = {NULL, NULL, PREC_NONE}
};
@ -1185,7 +1178,7 @@ static void _proto(CParseState *pstate)
int entries = 0;
while (!match(pstate, TOKEN_END) && !match(pstate, TOKEN_EOF) && !pstate->hadError) {
if (match(pstate, TOKEN_FUNCTION)) {
if (match(pstate, TOKEN_FUNC)) {
// define method
consume(pstate, TOKEN_IDENTIFIER, "Expected identifier for method!");
uint16_t fieldIdent = identifierConstant(pstate, &pstate->previous);
@ -1194,7 +1187,7 @@ static void _proto(CParseState *pstate)
writeu8(pstate, OP_LOADCONST);
writeu16(pstate, fieldIdent);
function(pstate, FTYPE_METHOD);
parseFunction(pstate, FTYPE_METHOD);
valuePopped(pstate, 1);
} else {
errorAtCurrent(pstate, "Illegal syntax!");
@ -1412,7 +1405,7 @@ static void whileStatement(CParseState *pstate)
patchJmp(pstate, exitJump);
}
static void function(CParseState *pstate, FunctionType type)
static void parseFunction(CParseState *pstate, FunctionType type)
{
CCompilerState compiler;
initCompilerState(pstate, &compiler, type, pstate->compiler);
@ -1478,7 +1471,7 @@ static void functionDeclaration(CParseState *pstate)
if (pstate->compiler->scopeDepth > 0)
markInitialized(pstate, var);
function(pstate, FTYPE_FUNCTION);
parseFunction(pstate, FTYPE_FUNCTION);
defineVariable(pstate, var, false);
}
@ -1509,12 +1502,12 @@ static void returnStatement(CParseState *pstate)
valuePopped(pstate, rvalues);
}
static void localFunction(CParseState *pstate)
static void localparseFunction(CParseState *pstate)
{
uint16_t var = parseVariable(pstate, "Expected identifer!", true);
markInitialized(pstate, var);
function(pstate, FTYPE_FUNCTION);
parseFunction(pstate, FTYPE_FUNCTION);
defineVariable(pstate, var, true);
}
@ -1735,12 +1728,12 @@ static void expressionStatement(CParseState *pstate)
{
int savedPushed = pstate->compiler->pushedValues;
if (match(pstate, TOKEN_VAR)) {
if (match(pstate, TOKEN_LET)) {
varDeclaration(pstate, false, 0);
} else if (match(pstate, TOKEN_LOCAL)) {
// force declare a local
if (match(pstate, TOKEN_FUNCTION))
localFunction(pstate); // force a local function declaration
if (match(pstate, TOKEN_FUNC))
localparseFunction(pstate); // force a local function declaration
else if (match(pstate, TOKEN_PROTO))
localProto(pstate); // force a local proto declaration
else
@ -1755,7 +1748,7 @@ static void expressionStatement(CParseState *pstate)
whileStatement(pstate);
} else if (match(pstate, TOKEN_FOR)) {
forLoop(pstate);
} else if (match(pstate, TOKEN_FUNCTION)) {
} else if (match(pstate, TOKEN_FUNC)) {
functionDeclaration(pstate);
} else if (match(pstate, TOKEN_PROTO)) {
protoDeclaration(pstate);

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@ -59,8 +59,7 @@ struct CState
CValue *top; // top of the stack
CObjObject *protoObjects[COBJ_MAX]; // proto object for each COBJ type [NULL = no default proto]
CObjString
*iStrings[ISTRING_MAX]; // strings used internally by the VM, eg. __init, __index & friends
CObjString *iStrings[ISTRING_MAX]; // strings used internally by the VM, eg. __init, __index
CCallFrame callFrame[FRAME_MAX]; // call frames
CValue stack[STACK_MAX]; // stack
};