Return-type warning and pseudo variable __A__ documentation added.
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@ -549,6 +549,8 @@ Here is a description of all the command line options:
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<tag><tt/remap-zero/</tag>
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Warn about a <tt/<ref id="pragma-charmap" name="#pragma charmap()">/
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that changes a character's code number from/to 0x00.
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<tag><tt/return-type/</tag>
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Warn about no return statement in function returning non-void..
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<tag><tt/struct-param/</tag>
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Warn when passing structs by value.
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<tag><tt/unknown-pragma/</tag>
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@ -726,6 +728,29 @@ This cc65 version has some extensions to the ISO C standard.
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will give the high byte of any unsigned value.
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<p>
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<item> There is pseudo variable named <tt/__A__/ that indicates accumulator register.
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It can be used to highlight the returned variable in non-void
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function where result is hidden in the <tt/asm/ section.
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every other variable. They are most useful together with short
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sequences of assembler code.
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For example, in the function below
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<tscreen><verb>
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BYTE get_key_via_atarixl_romcall_device_k(void) \
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asm("LDA $E425"); \
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asm("PHA"); \
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asm("LDA $E424"); \
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asm("PHA"); \
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asm("RTA"); \
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return __A__;
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</verb></tscreen>
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<tt/return __A__;/ will indicate that result is stored in the accumulator
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and suppress warning that function has no return statement. Instead, you can
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also use <tt/#pragma warn (return-type, off) ... pragma warn (return-type, on)/
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<p>
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<item> Inside a function, the identifier <tt/__func__/ gives the name of the
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current function as a string. Outside of functions, <tt/__func__/ is
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undefined.
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