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Do not use GT, GTEQ, or NEQ operators in the AST.

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- Since the VM doesn't directly support the GT, GTEQ, and NEQ comparisons,
  don't use them in the trees either. Instead, wrap them as LTEQ, LT, and
  EQEQ inside a BoolNot operator.
This commit is contained in:
Randy Heit 2013-10-02 23:28:06 -05:00
parent a0dbcb5d5b
commit 4bd5bf310b
1 changed files with 48 additions and 45 deletions
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93
src/zscript/zcc-parse.lemon
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@ -34,8 +34,8 @@ static void SetNodeLine(ZCC_TreeNode *name, int line)
#define SAFE_APPEND(a,b) \ #define SAFE_APPEND(a,b) \
if (a == NULL) a = b; else a->AppendSibling(b); if (a == NULL) a = b; else a->AppendSibling(b);
#define UNARY_EXPR(X,T) NEW_AST_NODE(ExprUnary, expr, X); expr->Operation = T; expr->Operand = X; expr->Type = NULL #define UNARY_EXPR(X,T) NEW_AST_NODE(ExprUnary, expr1, X); expr1->Operation = T; expr1->Operand = X; expr1->Type = NULL
#define BINARY_EXPR(X,Y,T) NEW_AST_NODE(ExprBinary, expr, X); expr->Operation = T; expr->Type = NULL; expr->Left = X; expr->Right = Y #define BINARY_EXPR(X,Y,T) NEW_AST_NODE(ExprBinary, expr2, X); expr2->Operation = T; expr2->Type = NULL; expr2->Left = X; expr2->Right = Y
#define NEW_INTCONST_NODE(name,type,val,tok) \ #define NEW_INTCONST_NODE(name,type,val,tok) \
NEW_AST_NODE(ExprConstant, name, tok); \ NEW_AST_NODE(ExprConstant, name, tok); \
@ -329,7 +329,7 @@ enum_def(X) ::= ENUM(T) IDENTIFIER(A) enum_type(B) LBRACE opt_enum_list(C) RBRAC
label->Type = NULL; label->Type = NULL;
BINARY_EXPR(label, one, PEX_Add); BINARY_EXPR(label, one, PEX_Add);
node->Value = expr; node->Value = expr2;
} }
} }
// Add a new terminating node, to indicate that the ConstantDefs for this enum are done. // Add a new terminating node, to indicate that the ConstantDefs for this enum are done.
@ -858,17 +858,17 @@ primary(X) ::= primary(A) DOT IDENTIFIER(B). // Member access
primary(X) ::= primary(A) ADDADD. /* postfix++ */ primary(X) ::= primary(A) ADDADD. /* postfix++ */
{ {
UNARY_EXPR(A,PEX_PostInc); UNARY_EXPR(A,PEX_PostInc);
X = expr; X = expr1;
} }
primary(X) ::= primary(A) SUBSUB. /* postfix-- */ primary(X) ::= primary(A) SUBSUB. /* postfix-- */
{ {
UNARY_EXPR(A,PEX_PostDec); UNARY_EXPR(A,PEX_PostDec);
X = expr; X = expr1;
} }
primary(X) ::= SCOPE primary(B). primary(X) ::= SCOPE primary(B).
{ {
BINARY_EXPR(NULL,B,PEX_Scope); BINARY_EXPR(NULL,B,PEX_Scope);
X = expr; X = expr2;
} }
/*----- Unary Expressions -----*/ /*----- Unary Expressions -----*/
@ -895,7 +895,7 @@ unary_expr(X) ::= SUB unary_expr(A). [UNARY]
else else
{ // For everything else, create a new node and do the negation later. { // For everything else, create a new node and do the negation later.
UNARY_EXPR(A,PEX_Negate); UNARY_EXPR(A,PEX_Negate);
X = expr; X = expr1;
} }
} }
unary_expr(X) ::= ADD unary_expr(A). [UNARY] unary_expr(X) ::= ADD unary_expr(A). [UNARY]
@ -907,7 +907,7 @@ unary_expr(X) ::= ADD unary_expr(A). [UNARY]
if (A->Operation != PEX_ConstValue || (!con->Type->IsA(RUNTIME_CLASS(PInt)) && !con->Type->IsA(RUNTIME_CLASS(PFloat)))) if (A->Operation != PEX_ConstValue || (!con->Type->IsA(RUNTIME_CLASS(PInt)) && !con->Type->IsA(RUNTIME_CLASS(PFloat))))
{ {
UNARY_EXPR(A,PEX_AntiNegate); UNARY_EXPR(A,PEX_AntiNegate);
X = expr; X = expr1;
} }
else else
{ {
@ -917,32 +917,32 @@ unary_expr(X) ::= ADD unary_expr(A). [UNARY]
unary_expr(X) ::= SUBSUB unary_expr(A). [UNARY] unary_expr(X) ::= SUBSUB unary_expr(A). [UNARY]
{ {
UNARY_EXPR(A,PEX_PreDec); UNARY_EXPR(A,PEX_PreDec);
X = expr; X = expr1;
} }
unary_expr(X) ::= ADDADD unary_expr(A). [UNARY] unary_expr(X) ::= ADDADD unary_expr(A). [UNARY]
{ {
UNARY_EXPR(A,PEX_PreInc); UNARY_EXPR(A,PEX_PreInc);
X = expr; X = expr1;
} }
unary_expr(X) ::= TILDE unary_expr(A). [UNARY] unary_expr(X) ::= TILDE unary_expr(A). [UNARY]
{ {
UNARY_EXPR(A,PEX_BitNot); UNARY_EXPR(A,PEX_BitNot);
X = expr; X = expr1;
} }
unary_expr(X) ::= BANG unary_expr(A). [UNARY] unary_expr(X) ::= BANG unary_expr(A). [UNARY]
{ {
UNARY_EXPR(A,PEX_BoolNot); UNARY_EXPR(A,PEX_BoolNot);
X = expr; X = expr1;
} }
unary_expr(X) ::= SIZEOF unary_expr(A). [UNARY] unary_expr(X) ::= SIZEOF unary_expr(A). [UNARY]
{ {
UNARY_EXPR(A,PEX_SizeOf); UNARY_EXPR(A,PEX_SizeOf);
X = expr; X = expr1;
} }
unary_expr(X) ::= ALIGNOF unary_expr(A). [UNARY] unary_expr(X) ::= ALIGNOF unary_expr(A). [UNARY]
{ {
UNARY_EXPR(A,PEX_AlignOf); UNARY_EXPR(A,PEX_AlignOf);
X = expr; X = expr1;
} }
/* Due to parsing conflicts, C-style casting is not supported. You /* Due to parsing conflicts, C-style casting is not supported. You
@ -958,136 +958,139 @@ expr(X) ::= unary_expr(A).
expr(X) ::= expr(A) ADD expr(B). /* a + b */ expr(X) ::= expr(A) ADD expr(B). /* a + b */
{ {
BINARY_EXPR(A,B,PEX_Add); BINARY_EXPR(A,B,PEX_Add);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) SUB expr(B). /* a - b */ expr(X) ::= expr(A) SUB expr(B). /* a - b */
{ {
BINARY_EXPR(A,B,PEX_Sub); BINARY_EXPR(A,B,PEX_Sub);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) MUL expr(B). /* a * b */ expr(X) ::= expr(A) MUL expr(B). /* a * b */
{ {
BINARY_EXPR(A,B,PEX_Mul); BINARY_EXPR(A,B,PEX_Mul);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) DIV expr(B). /* a / b */ expr(X) ::= expr(A) DIV expr(B). /* a / b */
{ {
BINARY_EXPR(A,B,PEX_Div); BINARY_EXPR(A,B,PEX_Div);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) MOD expr(B). /* a % b */ expr(X) ::= expr(A) MOD expr(B). /* a % b */
{ {
BINARY_EXPR(A,B,PEX_Mod); BINARY_EXPR(A,B,PEX_Mod);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) POW expr(B). /* a ** b */ expr(X) ::= expr(A) POW expr(B). /* a ** b */
{ {
BINARY_EXPR(A,B,PEX_Pow); BINARY_EXPR(A,B,PEX_Pow);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) CROSSPROD expr(B). /* a cross b */ expr(X) ::= expr(A) CROSSPROD expr(B). /* a cross b */
{ {
BINARY_EXPR(A,B,PEX_CrossProduct); BINARY_EXPR(A,B,PEX_CrossProduct);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) DOTPROD expr(B). /* a dot b */ expr(X) ::= expr(A) DOTPROD expr(B). /* a dot b */
{ {
BINARY_EXPR(A,B,PEX_DotProduct); BINARY_EXPR(A,B,PEX_DotProduct);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) LSH expr(B). /* a << b */ expr(X) ::= expr(A) LSH expr(B). /* a << b */
{ {
BINARY_EXPR(A,B,PEX_LeftShift); BINARY_EXPR(A,B,PEX_LeftShift);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) RSH expr(B). /* a >> b */ expr(X) ::= expr(A) RSH expr(B). /* a >> b */
{ {
BINARY_EXPR(A,B,PEX_RightShift); BINARY_EXPR(A,B,PEX_RightShift);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) DOTDOT expr(B). /* a .. b */ expr(X) ::= expr(A) DOTDOT expr(B). /* a .. b */
{ {
BINARY_EXPR(A,B,PEX_Concat); BINARY_EXPR(A,B,PEX_Concat);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) LT expr(B). /* a < b */ expr(X) ::= expr(A) LT expr(B). /* a < b */
{ {
BINARY_EXPR(A,B,PEX_LT); BINARY_EXPR(A,B,PEX_LT);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) GT expr(B). /* a > b */ expr(X) ::= expr(A) GT expr(B). /* a > b */
{ {
BINARY_EXPR(A,B,PEX_GT); BINARY_EXPR(A,B,PEX_LTEQ);
X = expr; UNARY_EXPR(expr2,PEX_BoolNot);
X = expr1;
} }
expr(X) ::= expr(A) LTEQ expr(B). /* a <= b */ expr(X) ::= expr(A) LTEQ expr(B). /* a <= b */
{ {
BINARY_EXPR(A,B,PEX_LTEQ); BINARY_EXPR(A,B,PEX_LTEQ);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) GTEQ expr(B). /* a >= b */ expr(X) ::= expr(A) GTEQ expr(B). /* a >= b */
{ {
BINARY_EXPR(A,B,PEX_GTEQ); BINARY_EXPR(A,B,PEX_LT);
X = expr; UNARY_EXPR(expr1,PEX_BoolNot);
X = expr1;
} }
expr(X) ::= expr(A) LTGTEQ expr(B). /* a <>= b */ expr(X) ::= expr(A) LTGTEQ expr(B). /* a <>= b */
{ {
BINARY_EXPR(A,B,PEX_LTGTEQ); BINARY_EXPR(A,B,PEX_LTGTEQ);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) IS expr(B). /* a is b */ expr(X) ::= expr(A) IS expr(B). /* a is b */
{ {
BINARY_EXPR(A,B,PEX_Is); BINARY_EXPR(A,B,PEX_Is);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) EQEQ expr(B). /* a == b */ expr(X) ::= expr(A) EQEQ expr(B). /* a == b */
{ {
BINARY_EXPR(A,B,PEX_EQEQ); BINARY_EXPR(A,B,PEX_EQEQ);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) NEQ expr(B). /* a != b */ expr(X) ::= expr(A) NEQ expr(B). /* a != b */
{ {
BINARY_EXPR(A,B,PEX_NEQ); BINARY_EXPR(A,B,PEX_EQEQ);
X = expr; UNARY_EXPR(expr2,PEX_BoolNot);
X = expr1;
} }
expr(X) ::= expr(A) APPROXEQ expr(B). /* a ~== b */ expr(X) ::= expr(A) APPROXEQ expr(B). /* a ~== b */
{ {
BINARY_EXPR(A,B,PEX_APREQ); BINARY_EXPR(A,B,PEX_APREQ);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) AND expr(B). /* a & b */ expr(X) ::= expr(A) AND expr(B). /* a & b */
{ {
BINARY_EXPR(A,B,PEX_BitAnd); BINARY_EXPR(A,B,PEX_BitAnd);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) XOR expr(B). /* a ^ b */ expr(X) ::= expr(A) XOR expr(B). /* a ^ b */
{ {
BINARY_EXPR(A,B,PEX_BitXor); BINARY_EXPR(A,B,PEX_BitXor);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) OR expr(B). /* a | b */ expr(X) ::= expr(A) OR expr(B). /* a | b */
{ {
BINARY_EXPR(A,B,PEX_BitOr); BINARY_EXPR(A,B,PEX_BitOr);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) ANDAND expr(B). /* a && b */ expr(X) ::= expr(A) ANDAND expr(B). /* a && b */
{ {
BINARY_EXPR(A,B,PEX_BoolAnd); BINARY_EXPR(A,B,PEX_BoolAnd);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) OROR expr(B). /* a || b */ expr(X) ::= expr(A) OROR expr(B). /* a || b */
{ {
BINARY_EXPR(A,B,PEX_BoolOr); BINARY_EXPR(A,B,PEX_BoolOr);
X = expr; X = expr2;
} }
expr(X) ::= expr(A) SCOPE expr(B). expr(X) ::= expr(A) SCOPE expr(B).
{ {
BINARY_EXPR(A,B,PEX_Scope); BINARY_EXPR(A,B,PEX_Scope);
X = expr; X = expr2;
} }
/*----- Trinary Expression -----*/ /*----- Trinary Expression -----*/
@ -1337,7 +1340,7 @@ iteration_statement(X) ::= while_or_until(TY) LPAREN expr(EX) RPAREN statement(S
if (TY.Int == ZCC_UNTIL) if (TY.Int == ZCC_UNTIL)
{ // Negate the loop condition { // Negate the loop condition
UNARY_EXPR(EX,PEX_BoolNot); UNARY_EXPR(EX,PEX_BoolNot);
iter->LoopCondition = expr; iter->LoopCondition = expr1;
} }
else else
{ {
@ -1355,7 +1358,7 @@ iteration_statement(X) ::= DO(T) statement(ST) while_or_until(TY) LPAREN expr(EX
if (TY.Int == ZCC_UNTIL) if (TY.Int == ZCC_UNTIL)
{ // Negate the loop condition { // Negate the loop condition
UNARY_EXPR(EX,PEX_BoolNot); UNARY_EXPR(EX,PEX_BoolNot);
iter->LoopCondition = expr; iter->LoopCondition = expr1;
} }
else else
{ {