Extracted functions from the convert/convert_type methods in expr2c#354

Merged

peterschrammel merged 5 commits intodiffblue:masterfrom

thk123:refactor/expr2c-function-extraction

Jan 13, 2017

Commits on Jan 13, 2017

Refactor out method for generating a struct expression
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committed
Moved out a function for generating C code for a struct type
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Extracted out the converting constant boolean expressions
thk123
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Extract out method for converting array types
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Cleanup changes
thk123
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