Program Listing for File operators.h

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#include "common.h"

enum Associativity {
    ASSOC_NEITHER = 0,
    ASSOC_LEFT,
    ASSOC_RIGHT,
};
unqualify(enum, Associativity);

enum Fixity {
    PREFIX  = 1 << 0,
    INFIX   = 1 << 1,
    POSTFIX = 1 << 2
};
unqualify(enum, Fixity);

struct Operator {
    u16 precedence;
    Associativity associativity;
    Fixity fixity;
    string name;
};
unqualify(struct, Operator);

newarray(OperatorTable, Operator);

OperatorTable DefaultOperators();

u0 new_operator(OperatorTable *, string, u16, Associativity, Fixity);

Operator *get_operator(OperatorTable, string, Fixity);

inline
bool is_prefix(Operator* op)
{ return (op->fixity & PREFIX) != 0; }

inline
bool is_infix(Operator* op)
{ return (op->fixity & INFIX) != 0; }

inline
bool is_postfix(Operator* op)
{ return (op->fixity & POSTFIX) != 0; }