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fixed multiple assignment

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CPunch 2021-01-05 17:05:49 -06:00
parent ec3552a155
commit 417a1f15f1
1 changed files with 36 additions and 10 deletions
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46
src/cparse.c
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@ -465,7 +465,7 @@ static void _etterOP(CParseState *pstate, uint8_t op, int arg) {
writeu8(pstate, arg); writeu8(pstate, arg);
} }
static void namedVariable(CParseState *pstate, CToken name, bool canAssign, bool canIncrement) { static void namedVariable(CParseState *pstate, CToken name, bool canAssign, bool canIncrement, int expectedValues) {
uint8_t opGet, opSet, inc; uint8_t opGet, opSet, inc;
int arg = getLocal(pstate->compiler, &name); int arg = getLocal(pstate->compiler, &name);
@ -486,9 +486,35 @@ static void namedVariable(CParseState *pstate, CToken name, bool canAssign, bool
inc = OP_INCGLOBAL; inc = OP_INCGLOBAL;
} }
if (canAssign && match(pstate, TOKEN_EQUAL)) { if (canAssign && match(pstate, TOKEN_COMMA)) {
// setter expectedValues++;
expression(pstate, 1, true);
consume(pstate, TOKEN_IDENTIFIER, "Expected another identifer!");
namedVariable(pstate, pstate->previous, true, false, expectedValues);
_etterOP(pstate, opSet, arg);
valuePopped(pstate, 1);
} else if (canAssign && match(pstate, TOKEN_EQUAL)) {
expectedValues++;
// consume all the ','
do {
int pushed = expression(pstate, expectedValues, false);
expectedValues -= pushed;
if (expectedValues < 0) { // these values need to be thrown away
writePop(pstate, -expectedValues);
valuePopped(pstate, -expectedValues);
expectedValues = 1;
}
} while (match(pstate, TOKEN_COMMA));
// for any expected value we didn't get
while (expectedValues-- > 0) {
valuePushed(pstate, 1);
writeu8(pstate, OP_NIL);
}
_etterOP(pstate, opSet, arg); _etterOP(pstate, opSet, arg);
valuePopped(pstate, 1); valuePopped(pstate, 1);
} else if (canIncrement && match(pstate, TOKEN_PLUS_PLUS)) { // i++ } else if (canIncrement && match(pstate, TOKEN_PLUS_PLUS)) { // i++
@ -542,7 +568,7 @@ static void anonFunction(CParseState *pstate, bool canAssign) {
} }
static void variable(CParseState *pstate, bool canAssign) { static void variable(CParseState *pstate, bool canAssign) {
namedVariable(pstate, pstate->previous, canAssign, true); namedVariable(pstate, pstate->previous, canAssign, true, 0);
} }
static void concat(CParseState *pstate, bool canAssign) { static void concat(CParseState *pstate, bool canAssign) {
@ -713,14 +739,14 @@ static void walkIndexes(CParseState *pstate, int lastIndexType, uint16_t lastIde
static void increment(CParseState *pstate, int val) { static void increment(CParseState *pstate, int val) {
CToken name = pstate->previous; CToken name = pstate->previous;
if (match(pstate, TOKEN_DOT)) { // object? if (match(pstate, TOKEN_DOT)) { // object?
namedVariable(pstate, name, false, false); // just get the object namedVariable(pstate, name, false, false, 0); // just get the object
consume(pstate, TOKEN_IDENTIFIER, "Expected property name after '.'."); consume(pstate, TOKEN_IDENTIFIER, "Expected property name after '.'.");
uint16_t ident = identifierConstant(pstate, &pstate->previous); uint16_t ident = identifierConstant(pstate, &pstate->previous);
// walk the indexes // walk the indexes
walkIndexes(pstate, 0, ident, val); walkIndexes(pstate, 0, ident, val);
} else if (match(pstate, TOKEN_LEFT_BRACKET)) { // dictionary? } else if (match(pstate, TOKEN_LEFT_BRACKET)) { // dictionary?
namedVariable(pstate, name, false, false); // just get the dictionary namedVariable(pstate, name, false, false, 0); // just get the dictionary
// grab key // grab key
expression(pstate, 1, true); expression(pstate, 1, true);
@ -1398,7 +1424,7 @@ static int expressionPrecedence(CParseState *pstate, int needed, Precedence prec
} }
static int expression(CParseState *pstate, int needed, bool forceNeeded) { static int expression(CParseState *pstate, int needed, bool forceNeeded) {
return expressionPrecedence(pstate, needed, PREC_ASSIGNMENT, forceNeeded); return expressionPrecedence(pstate, needed, PREC_ASSIGNMENT + 1, forceNeeded); // anything above assignments are an expression
} }
static void expressionStatement(CParseState *pstate) { static void expressionStatement(CParseState *pstate) {
@ -1433,8 +1459,8 @@ static void expressionStatement(CParseState *pstate) {
} else if (match(pstate, TOKEN_RETURN)) { } else if (match(pstate, TOKEN_RETURN)) {
returnStatement(pstate); returnStatement(pstate);
} else { } else {
// we don't need/want any values on the stack, so call expression with 0 values needed // expression or assignment
expression(pstate, 0, false); expressionPrecedence(pstate, 0, PREC_ASSIGNMENT, false);
} }
// realign the stack // realign the stack