Reorganized a few functions in cc65/datatype.c.
Added SignedType() and UnsignedType() for future usage.
Made LimitExprValue() external so that it can be used more often.
The first one is replaced by an #include of the header that has its original TYPEDEF.
The second one is replaced by its base type.
That change allows pedantic C90-compliant compilers to accept the header.
Fixed pointer type comparison and conversion, especially regarding qualifiers.
Improved diagnostics about type comparison and conversion.
Reorganized some type-comparison/conversion functions.
Previously, the following rules were used for binary operators:
* If one of the values is a long, the result is long.
* If one of the values is unsigned, the result is also unsigned.
* Otherwise the result is an int.
C89 specifies the "usual arithmetic conversions" as:
* The integral promotions are performed on both operands.
* Then the following rules are applied:
* If either operand has type unsigned long int, the other operand is
converted to unsigned long int.
* Otherwise, if one operand has type long int and the other has type
unsigned int, if a long int can represent all values of an unsigned int,
the operand of type unsigned int is converted to long int; if a long int
cannot represent all the values of an unsigned int, both operands are
converted to unsigned long int.
* Otherwise, if either operand has type long int, the other operand is
converted to long int.
* Otherwise, if either operand has type unsigned int, the other operand is
converted to unsigned int.
* Otherwise, both operands have type int.
https://port70.net/~nsz/c/c89/c89-draft.html#3.2.1.5
As one example, these rules give a different result for an operator
with one long operand and one unsigned int operand. Previously,
the result type was unsigned long. With C89 semantics, it is just long,
since long can represent all unsigned ints.
Integral promotions convert types shorter than int to int (or unsigned int).
Both char and unsigned char are promoted to int since int can represent
all unsigned chars.
https://port70.net/~nsz/c/c89/c89-draft.html#3.2.1.1
Rename promoteint to ArithmeticConvert, since this is more accurate.
Fixes#170
Renamed GetReplacementType() to GetStructReplacementType().
Clarified in comments that most *Struct* facilities work for unions as well.
Made it clear in some error messages with regards to structs/unions.
didn't look "deep enough" into nested arrays to determine the constness
correctly.
git-svn-id: svn://svn.cc65.org/cc65/trunk@5622 b7a2c559-68d2-44c3-8de9-860c34a00d81
be converted to pointer-to-function and an array to pointer-to-member resp.
git-svn-id: svn://svn.cc65.org/cc65/trunk@3977 b7a2c559-68d2-44c3-8de9-860c34a00d81
type. Started to add general handling of address size flags in types.
git-svn-id: svn://svn.cc65.org/cc65/trunk@3891 b7a2c559-68d2-44c3-8de9-860c34a00d81
using signed integers as data types. This led to wrong results for mod, div
and compares.
git-svn-id: svn://svn.cc65.org/cc65/trunk@3797 b7a2c559-68d2-44c3-8de9-860c34a00d81
elements to a string of structs, each representing one type element. This
should fix problems on unusual architectures, since it is no longer necessary
to embedd pointers and other data converted to numbers in the string of
unsigned shorts.
Increased the TypeCode length to unsigned long to make room for more type
bits.
Inline more functions in datatype.h.
git-svn-id: svn://svn.cc65.org/cc65/trunk@3709 b7a2c559-68d2-44c3-8de9-860c34a00d81
acqn
Greg King
Jesse Rosenstock
Oliver Schmidt
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