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Added ':' invoke operator

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You're now forced to use ':' when calling a method on an object. Some of Lua's ideas really are just better in practice /shrug
This commit is contained in:
CPunch
2021-01-12 17:46:22 -06:00
parent c510c9aebf
commit ab86e19cfe
6 changed files with 91 additions and 100 deletions
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39
src/cparse.c
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@@ -631,8 +631,8 @@ static void table(CParseState *pstate, bool canAssign, Precedence prec) {
// grab value/key
expression(pstate, 1, true);
// they want to make a table with key:value
if (match(pstate, TOKEN_COLON) && tblType != 1) {
// they want to make a table with key = value
if (match(pstate, TOKEN_EQUAL) && tblType != 1) {
tblType = 2; // dictionary-like
// grab value
@@ -718,14 +718,6 @@ static void dot(CParseState *pstate, bool canAssign, Precedence prec) {
writeu8(pstate, OP_INCOBJECT);
writeu8(pstate, 128 - 1);
writeu16(pstate, name);
} else if (match(pstate, TOKEN_LEFT_PAREN)) { // it's an invoked call
uint8_t args = parseArguments(pstate);
writeu8(pstate, OP_INVOKE);
writeu8(pstate, args);
writeu8(pstate, pstate->compiler->expectedValues);
writeu16(pstate, name);
valuePopped(pstate, args+1); // args + function
valuePushed(pstate, pstate->compiler->expectedValues);
} else {
writeu8(pstate, OP_GETOBJECT);
writeu16(pstate, name);
@@ -754,6 +746,31 @@ static void _index(CParseState *pstate, bool canAssign, Precedence prec) {
valuePopped(pstate, 1); // pops key & object but also pushes the value so total popped is 1
}
static void invoke(CParseState *pstate, bool canAssign, Precedence prec) {
int returnNum = pstate->compiler->expectedValues;
uint16_t name;
uint8_t args;
consume(pstate, TOKEN_IDENTIFIER, "Expected method name after ':'.");
name = identifierConstant(pstate, &pstate->previous);
consume(pstate, TOKEN_LEFT_PAREN, "Expected '(' after method identifier!");
args = parseArguments(pstate);
// 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, OP_INVOKE);
writeu8(pstate, args);
writeu8(pstate, returnNum);
writeu16(pstate, name);
valuePopped(pstate, args+1); // args + function
valuePushed(pstate, returnNum);
}
// ++test.field[1]
// this function is kind of spaghetti, feel free to rewrite (if you dare!)
static void walkIndexes(CParseState *pstate, int lastIndexType, uint16_t lastIdent, int val) {
@@ -879,7 +896,7 @@ ParseRule ruleTable[] = {
[TOKEN_LEFT_BRACKET] = {table, _index, PREC_CALL},
[TOKEN_RIGHT_BRACKET] = {NULL, NULL, PREC_NONE},
[TOKEN_COMMA] = {NULL, NULL, PREC_NONE},
[TOKEN_COLON] = {NULL, NULL, PREC_NONE},
[TOKEN_COLON] = {NULL, invoke, PREC_CALL},
[TOKEN_DOT] = {NULL, dot, PREC_CALL},
[TOKEN_DOT_DOT] = {NULL, concat, PREC_CONCAT},
[TOKEN_DOT_DOT_DOT] = {NULL, NULL, PREC_NONE},