forked from GitHub/gf-core
33 lines
1008 B
Plaintext
33 lines
1008 B
Plaintext
Using multiple inheritance in GF. AR 15/9/2004.
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The following diagrams show inheritance between abstract syntaxes in two simple systems.
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TopCity
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/ | \
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/ | \
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SystemCity UserCity Top
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/ \ / \
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System City User
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TopMath
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/ | \
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/ | \
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SystemMath UserMath Top
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/ \ / \
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System Math User
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Idea of each module:
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User -- User's moves on any domain
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System -- System's moves on any domain
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Top -- grammar covering both kinds of moves
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X = Math, City -- possible domains
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UserX -- User's domain specific moves
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SystemX -- System's domain specific moves
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TopX -- all moves on the domain X
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In parallel to the abstract syntax hierarchies, we have of course
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hierarchies of concrete syntaxes for any language; this directory contains Eng.
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