89 lines
2.0 KiB
PHP
89 lines
2.0 KiB
PHP
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; Simple preprocessor for inline macros.
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; Example of use:
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;
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; inlinemacro oddflip(number)
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; return = (number) xor 1
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; end inlinemacro
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;
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; db oddflip(3), oddflip(oddflip(0) shl 1)
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; Any kind of definition of an expression-class symbol may be used for the return value.
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include 'xcalm.inc'
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define inlinemacro? inlinemacro?
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inlinemacro... = 0
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calminstruction inlinemacro?! &declaration&
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local name
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match name(arguments?), declaration
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jyes define
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match name= arguments?, declaration
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jyes define
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match name arguments?, declaration
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define:
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arrange tmp, =__inline__.name
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arrange name, =inlinemacro.name
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publish name, tmp
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arrange tmp, =struc (=return?) name arguments
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assemble tmp
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end calminstruction
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calminstruction end?.inlinemacro?!
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asm end struc
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check inlinemacro...
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jyes done
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compute inlinemacro..., 1
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asm inlinemacro?.enable?
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done:
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end calminstruction
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macro inlinemacro?.enable? chain
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chain
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macro include?! file*, head
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include file, inlinemacro.enable head
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purge ?, include?
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end macro
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calminstruction ?! &text&
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local head, tail, name, arguments, more, i
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init i, 0
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match =inlinemacro? more, text
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jyes ready
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transform text, inlinemacro
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jno ready
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match =else? more, text
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jno preprocess
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compute i, i+1
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arrange text, =__inline__.?(=else =if 1) =__inline__.?(=__return__.i==1) text =__inline__.?(=end =if) =__inline__.?(=if ~=definite =__return__.i)
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preprocess:
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match head? =__inline__.name tail?, text
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jno ready
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match (arguments?) tail?, tail, ()
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jyes inline
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arrange text, head name tail
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jump preprocess
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inline:
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match ?, name
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jyes special
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local tmp, return
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compute i, i+1
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arrange return, =__return__.i
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arrange tmp, return =inlinemacro.name arguments
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arrange text, head return tail
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take text, tmp
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jump preprocess
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special:
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arrange text, head tail
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take text, arguments
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jump preprocess
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ready:
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assemble text
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take , text
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take text, text
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jyes preprocess
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end calminstruction
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end macro
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