SW500007 Microchip Technology, SW500007 Datasheet - Page 392

• Manufacturer Part Number: SW500007
• Description: PICC-18 PRO
• Manufacturer: Microchip Technology
• Type: Compilerr
• Series: PIC18r

Specifications of SW500007

• Supported Families: PIC18
• Core Architecture: PIC
• Software Edition: Professional
• Kit Contents: Software And Docs
• Mcu Supported Families: PIC18
• Tool Function: Compiler
• Tool Type: Compiler
• Lead Free Status / RoHS Status: Not applicable / RoHS Compliant
• For Use With/related Products: PIC18 Series
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 015P; 778-1002; 778-1002

which checks to see if a is equal to 4.
(759) expression generates no code
This expression generates no output code. Check for things like leaving off the parentheses in a
function call, e.g.:
Some devices require that special function register need to be read to clear hardware flags. To
accommodate this, in some instances the code generator does produce code for a statement which
only consists of a variable ID. This may happen for variables which are qualified as volatile.
Typically the output code will read the variable, but not do anything with the value read.
(760) portion of expression has no effect
Part of this expression has no side effects, and no effect on the value of the expression, e.g.:
(761) sizeof yields 0
The code generator has taken the size of an object and found it to be zero. This almost certainly
indicates an error in your declaration of a pointer, e.g. you may have declared a pointer to a zero
length array. In general, pointers to arrays are of little use. If you require a pointer to an array of
objects of unknown length, you only need a pointer to a single object that can then be indexed or
incremented.
(763) constant left operand to ?
The left operand to a conditional operator ? is constant, thus the result of the tertiary operator ?:
will always be the same, e.g.:
378
if(a == 4) /* this can never be false; always perform the true statement */
int fred;
fred;
int a, b, c;
a = b,c; /* “b” has no effect, was that meant to be a comma? */
a = 8 ? b : c; /* this is the same as saying a = b; */
b = 6;
/* this is valid, but has no effect at all */
Error and Warning Messages
(Code Generator)
(Code Generator)
(Code Generator)
(Code Generator)