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update parse_expression

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This commit is contained in:
blueloveTH 2024-11-12 18:52:42 +08:00
parent 068ec948ec
commit 8e3c335449
1 changed files with 16 additions and 15 deletions
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31
src/compiler/compiler.c
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@ -781,7 +781,9 @@ static void BinaryExpr__emit_(Expr* self_, Ctx* ctx) {
case TK_DIV: arg = __truediv__ | (__rtruediv__ << 8); break;
case TK_FLOORDIV: arg = __floordiv__ | (__rfloordiv__ << 8); break;
case TK_MOD: arg = __mod__ | (__rmod__ << 8); break;
// right-associated
case TK_POW: arg = __pow__ | (__rpow__ << 8); break;
case TK_DECORATOR: arg = __matmul__; break;
case TK_LT: arg = __lt__ | (__gt__ << 8); break;
case TK_LE: arg = __le__ | (__ge__ << 8); break;
@ -812,7 +814,6 @@ static void BinaryExpr__emit_(Expr* self_, Ctx* ctx) {
case TK_AND: arg = __and__; break;
case TK_OR: arg = __or__; break;
case TK_XOR: arg = __xor__; break;
case TK_DECORATOR: arg = __matmul__; break;
default: assert(false);
}
@ -1395,7 +1396,7 @@ static Error* parse_expression(Compiler* self, int precedence, bool allow_slice)
advance();
Error* err;
check(prefix(self));
while(rules[curr()->type].precedence >= precedence &&
while(rules[curr()->type].precedence > precedence &&
(allow_slice || curr()->type != TK_COLON)) {
TokenIndex op = curr()->type;
advance();
@ -1410,14 +1411,14 @@ static Error* parse_expression(Compiler* self, int precedence, bool allow_slice)
static Error* EXPR_TUPLE_ALLOW_SLICE(Compiler* self, bool allow_slice) {
Error* err;
check(parse_expression(self, PREC_LOWEST + 1, allow_slice));
check(parse_expression(self, PREC_LOWEST, allow_slice));
if(!match(TK_COMMA)) return NULL;
// tuple expression // (a, )
int count = 1;
do {
if(curr()->brackets_level) match_newlines();
if(!is_expression(self, allow_slice)) break;
check(parse_expression(self, PREC_LOWEST + 1, allow_slice));
check(parse_expression(self, PREC_LOWEST, allow_slice));
count += 1;
if(curr()->brackets_level) match_newlines();
} while(match(TK_COMMA));
@ -1432,7 +1433,7 @@ static Error* EXPR_TUPLE_ALLOW_SLICE(Compiler* self, bool allow_slice) {
}
/// Parse a simple expression.
static Error* EXPR(Compiler* self) { return parse_expression(self, PREC_LOWEST + 1, false); }
static Error* EXPR(Compiler* self) { return parse_expression(self, PREC_LOWEST, false); }
/// Parse a simple expression or a tuple of expressions.
static Error* EXPR_TUPLE(Compiler* self) { return EXPR_TUPLE_ALLOW_SLICE(self, false); }
@ -1602,7 +1603,7 @@ static Error* exprLambda(Compiler* self) {
consume(TK_COLON);
}
// https://github.com/pocketpy/pocketpy/issues/37
check(parse_expression(self, PREC_LAMBDA + 1, false));
check(parse_expression(self, PREC_LAMBDA, false));
Ctx__s_emit_top(ctx());
Ctx__emit_(ctx(), OP_RETURN_VALUE, BC_NOARG, BC_KEEPLINE);
check(pop_context(self));
@ -1614,7 +1615,7 @@ static Error* exprLambda(Compiler* self) {
static Error* exprOr(Compiler* self) {
Error* err;
int line = prev()->line;
check(parse_expression(self, PREC_LOGICAL_OR + 1, false));
check(parse_expression(self, PREC_LOGICAL_OR, false));
LogicBinaryExpr* e = LogicBinaryExpr__new(line, OP_JUMP_IF_TRUE_OR_POP);
e->rhs = Ctx__s_popx(ctx());
e->lhs = Ctx__s_popx(ctx());
@ -1625,7 +1626,7 @@ static Error* exprOr(Compiler* self) {
static Error* exprAnd(Compiler* self) {
Error* err;
int line = prev()->line;
check(parse_expression(self, PREC_LOGICAL_AND + 1, false));
check(parse_expression(self, PREC_LOGICAL_AND, false));
LogicBinaryExpr* e = LogicBinaryExpr__new(line, OP_JUMP_IF_FALSE_OR_POP);
e->rhs = Ctx__s_popx(ctx());
e->lhs = Ctx__s_popx(ctx());
@ -1637,9 +1638,9 @@ static Error* exprTernary(Compiler* self) {
// [true_expr]
Error* err;
int line = prev()->line;
check(parse_expression(self, PREC_TERNARY + 1, false)); // [true_expr, cond]
check(parse_expression(self, PREC_TERNARY, false)); // [true_expr, cond]
consume(TK_ELSE);
check(parse_expression(self, PREC_TERNARY + 1, false)); // [true_expr, cond, false_expr]
check(parse_expression(self, PREC_TERNARY, false)); // [true_expr, cond, false_expr]
TernaryExpr* e = TernaryExpr__new(line);
e->false_expr = Ctx__s_popx(ctx());
e->cond = Ctx__s_popx(ctx());
@ -1652,7 +1653,7 @@ static Error* exprBinaryOp(Compiler* self) {
Error* err;
int line = prev()->line;
TokenIndex op = prev()->type;
check(parse_expression(self, rules[op].precedence + 1, false));
check(parse_expression(self, rules[op].precedence, false));
BinaryExpr* e = BinaryExpr__new(line, op, false);
if(op == TK_IN || op == TK_NOT_IN) {
e->lhs = Ctx__s_popx(ctx());
@ -1668,7 +1669,7 @@ static Error* exprBinaryOp(Compiler* self) {
static Error* exprNot(Compiler* self) {
Error* err;
int line = prev()->line;
check(parse_expression(self, PREC_LOGICAL_NOT + 1, false));
check(parse_expression(self, PREC_LOGICAL_NOT, false));
UnaryExpr* e = UnaryExpr__new(line, Ctx__s_popx(ctx()), OP_UNARY_NOT);
Ctx__s_push(ctx(), (Expr*)e);
return NULL;
@ -1678,7 +1679,7 @@ static Error* exprUnaryOp(Compiler* self) {
Error* err;
int line = prev()->line;
TokenIndex op = prev()->type;
check(parse_expression(self, PREC_UNARY + 1, false));
check(parse_expression(self, PREC_UNARY, false));
Expr* e = Ctx__s_popx(ctx());
switch(op) {
case TK_SUB: {
@ -1749,10 +1750,10 @@ static Error* consume_comp(Compiler* self, Opcode op0, Opcode op1) {
bool has_cond = false;
check(EXPR_VARS(self)); // [expr, vars]
consume(TK_IN);
check(parse_expression(self, PREC_TERNARY + 1, false)); // [expr, vars, iter]
check(parse_expression(self, PREC_TERNARY, false)); // [expr, vars, iter]
match_newlines();
if(match(TK_IF)) {
check(parse_expression(self, PREC_TERNARY + 1, false)); // [expr, vars, iter, cond]
check(parse_expression(self, PREC_TERNARY, false)); // [expr, vars, iter, cond]
has_cond = true;
}
CompExpr* ce = CompExpr__new(line, op0, op1);