mirror of
https://github.com/CPunch/Cosmo.git
synced 2024-11-25 00:21:05 +00:00
fixed multiple assignments from function calls()
This commit is contained in:
parent
860f30f201
commit
ea4654cb6e
61
src/cparse.c
61
src/cparse.c
@ -75,7 +75,7 @@ typedef enum {
|
||||
PREC_PRIMARY // everything else
|
||||
} Precedence;
|
||||
|
||||
typedef void (*ParseFunc)(CParseState* pstate, bool canAssign);
|
||||
typedef void (*ParseFunc)(CParseState* pstate, bool canAssign, Precedence curPrec);
|
||||
|
||||
typedef struct {
|
||||
ParseFunc prefix;
|
||||
@ -84,7 +84,6 @@ typedef struct {
|
||||
} ParseRule;
|
||||
|
||||
static void parsePrecedence(CParseState*, Precedence);
|
||||
static void variable(CParseState *pstate, bool canAssign);
|
||||
static int expressionPrecedence(CParseState *pstate, int needed, Precedence prec, bool forceNeeded);
|
||||
static int expression(CParseState *pstate, int needed, bool forceNeeded);
|
||||
static void statement(CParseState *pstate);
|
||||
@ -144,11 +143,12 @@ static void errorAt(CParseState *pstate, CToken *token, const char *format, va_l
|
||||
if (pstate->hadError)
|
||||
return;
|
||||
|
||||
|
||||
if (token->type == TOKEN_EOF) {
|
||||
cosmoV_pushString(pstate->state, "At end: ");
|
||||
} else if (!(token->type == TOKEN_ERROR)) {
|
||||
cosmoV_pushFString(pstate->state, "At '%t'", token); // this is why the '%t' exist in cosmoO_pushFString lol
|
||||
cosmoV_pushFString(pstate->state, "At '%t': ", token); // this is why the '%t' exist in cosmoO_pushFString lol
|
||||
} else {
|
||||
cosmoV_pushString(pstate->state, "Lexer error: ");
|
||||
}
|
||||
|
||||
cosmoO_pushVFString(pstate->state, format, args);
|
||||
@ -395,19 +395,24 @@ static void alignStack(CParseState *pstate, int alignment) {
|
||||
pstate->compiler->pushedValues = alignment;
|
||||
}
|
||||
|
||||
// last in precedence expression?
|
||||
static bool isLast(CParseState *pstate, Precedence pType) {
|
||||
return pType > getRule(pstate->current.type)->level;
|
||||
}
|
||||
|
||||
// ================================================================ [PARSER] ================================================================
|
||||
|
||||
static void number(CParseState *pstate, bool canAssign) {
|
||||
static void number(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
cosmo_Number num = strtod(pstate->previous.start, NULL);
|
||||
writeConstant(pstate, cosmoV_newNumber(num));
|
||||
}
|
||||
|
||||
static void string(CParseState *pstate, bool canAssign) {
|
||||
static void string(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
CObjString *strObj = cosmoO_takeString(pstate->state, pstate->previous.start, pstate->previous.length);
|
||||
writeConstant(pstate, cosmoV_newObj((CObj*)strObj));
|
||||
}
|
||||
|
||||
static void literal(CParseState *pstate, bool canAssign) {
|
||||
static void literal(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
switch (pstate->previous.type) {
|
||||
case TOKEN_TRUE: writeu8(pstate, OP_TRUE); break;
|
||||
case TOKEN_FALSE: writeu8(pstate, OP_FALSE); break;
|
||||
@ -420,7 +425,7 @@ static void literal(CParseState *pstate, bool canAssign) {
|
||||
}
|
||||
|
||||
// parses prefix operators
|
||||
static void unary(CParseState *pstate, bool canAssign) {
|
||||
static void unary(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
CTokenType type = pstate->previous.type;
|
||||
int cachedLine = pstate->previous.line; // eval'ing the next expression might change the line number
|
||||
|
||||
@ -437,7 +442,7 @@ static void unary(CParseState *pstate, bool canAssign) {
|
||||
}
|
||||
|
||||
// parses infix operators
|
||||
static void binary(CParseState *pstate, bool canAssign) {
|
||||
static void binary(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
CTokenType type = pstate->previous.type; // already consumed
|
||||
int cachedLine = pstate->previous.line; // eval'ing the next expression might change the line number
|
||||
|
||||
@ -464,7 +469,7 @@ static void binary(CParseState *pstate, bool canAssign) {
|
||||
valuePopped(pstate, 1); // we pop 2 values off the stack and push 1 for a net pop of 1 value
|
||||
}
|
||||
|
||||
static void group(CParseState *pstate, bool canAssign) {
|
||||
static void group(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
expression(pstate, 1, true);
|
||||
consume(pstate, TOKEN_RIGHT_PAREN, "Expected ')'");
|
||||
}
|
||||
@ -554,7 +559,7 @@ static void namedVariable(CParseState *pstate, CToken name, bool canAssign, bool
|
||||
}
|
||||
}
|
||||
|
||||
static void and_(CParseState *pstate, bool canAssign) {
|
||||
static void and_(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
int jump = writeJmp(pstate, OP_EJMP); // conditional jump without popping
|
||||
|
||||
writePop(pstate, 1);
|
||||
@ -563,7 +568,7 @@ static void and_(CParseState *pstate, bool canAssign) {
|
||||
patchJmp(pstate, jump);
|
||||
}
|
||||
|
||||
static void or_(CParseState *pstate, bool canAssign) {
|
||||
static void or_(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
int elseJump = writeJmp(pstate, OP_EJMP);
|
||||
int endJump = writeJmp(pstate, OP_JMP);
|
||||
|
||||
@ -575,15 +580,15 @@ static void or_(CParseState *pstate, bool canAssign) {
|
||||
patchJmp(pstate, endJump);
|
||||
}
|
||||
|
||||
static void anonFunction(CParseState *pstate, bool canAssign) {
|
||||
static void anonFunction(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
function(pstate, FTYPE_FUNCTION);
|
||||
}
|
||||
|
||||
static void variable(CParseState *pstate, bool canAssign) {
|
||||
static void variable(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
namedVariable(pstate, pstate->previous, canAssign, true, 0);
|
||||
}
|
||||
|
||||
static void concat(CParseState *pstate, bool canAssign) {
|
||||
static void concat(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
CTokenType type = pstate->previous.type;
|
||||
|
||||
int vars = 1; // we already have something on the stack
|
||||
@ -598,19 +603,25 @@ static void concat(CParseState *pstate, bool canAssign) {
|
||||
valuePopped(pstate, vars - 1); // - 1 because we're pushing the concat result
|
||||
}
|
||||
|
||||
static void call_(CParseState *pstate, bool canAssign) {
|
||||
static void call_(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
// we enter having already consumed the '('
|
||||
int returnNum = pstate->compiler->expectedValues;
|
||||
|
||||
// grab our arguments
|
||||
uint8_t argCount = parseArguments(pstate);
|
||||
valuePopped(pstate, argCount + 1); // all of these values will be popped off the stack when returned (+1 for the function)
|
||||
writeu8(pstate, OP_CALL);
|
||||
writeu8(pstate, argCount);
|
||||
writeu8(pstate, pstate->compiler->expectedValues);
|
||||
valuePushed(pstate, pstate->compiler->expectedValues);
|
||||
|
||||
// if we're not the last token in this expression or we're expecting multiple values, we should return only 1 value!!
|
||||
if (!isLast(pstate, prec) || (returnNum > 1 && check(pstate, TOKEN_COMMA)))
|
||||
returnNum = 1;
|
||||
|
||||
writeu8(pstate, returnNum);
|
||||
valuePushed(pstate, returnNum);
|
||||
}
|
||||
|
||||
static void object(CParseState *pstate, bool canAssign) {
|
||||
static void object(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
// already consumed the beginning '{'
|
||||
int entries = 0;
|
||||
|
||||
@ -637,7 +648,7 @@ static void object(CParseState *pstate, bool canAssign) {
|
||||
valuePushed(pstate, 1);
|
||||
}
|
||||
|
||||
static void dot(CParseState *pstate, bool canAssign) {
|
||||
static void dot(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
consume(pstate, TOKEN_IDENTIFIER, "Expected property name after '.'.");
|
||||
uint16_t name = identifierConstant(pstate, &pstate->previous);
|
||||
|
||||
@ -672,7 +683,7 @@ static void dot(CParseState *pstate, bool canAssign) {
|
||||
}
|
||||
}
|
||||
|
||||
static void _index(CParseState *pstate, bool canAssign) {
|
||||
static void _index(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
expression(pstate, 1, true);
|
||||
consume(pstate, TOKEN_RIGHT_BRACKET, "Expected ']' to end index.");
|
||||
|
||||
@ -795,7 +806,7 @@ static void increment(CParseState *pstate, int val) {
|
||||
}
|
||||
|
||||
// ++i
|
||||
static void preincrement(CParseState *pstate, bool canAssign) {
|
||||
static void preincrement(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
// expect identifier
|
||||
consume(pstate, TOKEN_IDENTIFIER, "Expected identifier after '++'");
|
||||
|
||||
@ -803,7 +814,7 @@ static void preincrement(CParseState *pstate, bool canAssign) {
|
||||
}
|
||||
|
||||
// --i
|
||||
static void predecrement(CParseState *pstate, bool canAssign) {
|
||||
static void predecrement(CParseState *pstate, bool canAssign, Precedence prec) {
|
||||
// expect identifier
|
||||
consume(pstate, TOKEN_IDENTIFIER, "Expected identifier after '--'");
|
||||
|
||||
@ -881,12 +892,12 @@ static void parsePrecedence(CParseState *pstate, Precedence prec) {
|
||||
return;
|
||||
|
||||
bool canAssign = prec <= PREC_ASSIGNMENT;
|
||||
prefix(pstate, canAssign);
|
||||
prefix(pstate, canAssign, prec);
|
||||
|
||||
while (prec <= getRule(pstate->current.type)->level) {
|
||||
ParseFunc infix = getRule(pstate->current.type)->infix;
|
||||
advance(pstate);
|
||||
infix(pstate, canAssign);
|
||||
infix(pstate, canAssign, prec);
|
||||
}
|
||||
|
||||
if (canAssign && match(pstate, TOKEN_EQUAL)) {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user