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dmd.optimize
Perform constant folding.
Expression
expandVar(int
result, VarDeclaration
v);
If variable has a const initializer, return that initializer.
Returns:initializer if there is one, null if not, ErrorExp if error
package void
setLengthVarIfKnown(VarDeclaration
lengthVar, Expression
arr);
It is possible for constant folding to change an array expression of unknown length, into one where the length is known. If the expression 'arr' is a literal, set lengthVar to be its length.
Parameters:VarDeclarationlengthVar | variable declaration for the.length property |
Expressionarr | String, ArrayLiteral, or of TypeSArray |
package void
setLengthVarIfKnown(VarDeclaration
lengthVar, Type
type);
Same as above, but determines the length from 'type'.
Parameters:VarDeclarationlengthVar | variable declaration for the.length property |
Typetype | TypeSArray |
Expression
optimize(Expression
e, int
result, bool
keepLvalue = false);
Constant fold an Expression.
Parameters:Expressione | expression to const fold; this may get modified in-place |
intresult | WANTvalue, WANTexpand, or both |
boolkeepLvalue | e is an lvalue, and keep it as an lvalue since it is an argument to aref orout parameter, or the operand of& operator |
Returns:Constant folded version ofe
