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48 lines
957 B
Markdown
48 lines
957 B
Markdown
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# Eval Functions
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Eval Functions are used like symbols in expressions but are always followed by parenthesis with optional arguments.
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### DEFINED, DEF
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.if .def(symbol)
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.endif
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Evaluates to 1 if the symbol has been defined or 0 if it has not been encountered to this point in the current assembly.
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### REFERENCED
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.if .referenced(symbol)
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.endif
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Evaluates to 1 if the symbol has been referenced in the current assembly, the symbol should be defined at this point.
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### BLANK
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.if .blank()
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.endif
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Evaluates to 1 if the contents within the parenthesis is empty, primarily for use within macros.
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### CONST
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if .const(symbol)
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.endif
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Evaluates to 1 if the symbol has been declared CONST, the symbol should be defined at this point.
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### SIZEOF
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STRUCT Module {
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word Init
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word Update
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word Shutdown
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}
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ds SIZEOF( Module )
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Returns the byte size of a given struct.
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### TRIGSIN
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Not implemented, experimental math feature, currently returns 0
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