The great merge

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@4141 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/mzscheme/std_vector/.cvsignore

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+example_wrap.cxx

SWIG/Examples/mzscheme/std_vector/Makefile

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+TOP        = ../..
+SWIG       = $(TOP)/../swig
+SRCS       = 
+TARGET     = example
+INTERFACE  = example.i
+SWIGOPT    = 
+
+GPP        = `which g++`
+MZC        = test -n "/usr/bin/mzc" && /usr/bin/mzc
+
+all::
+	$(SWIG) -mzscheme -c++ $(SWIGOPT) $(INTERFACE)
+	$(MZC) --compiler $(GPP) ++ccf "-I." --cc example_wrap.cxx
+	$(MZC) --linker $(GPP) --ld $(TARGET).so example_wrap.o 
+	
+clean:
+	$(MAKE) -f $(TOP)/Makefile mzscheme_clean
+
+check: all

SWIG/Examples/mzscheme/std_vector/example.h

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+/* File : example.h */
+
+#include <vector>
+#include <algorithm>
+#include <functional>
+#include <numeric>
+
+double average(std::vector<int> v) {
+    return std::accumulate(v.begin(),v.end(),0.0)/v.size();
+}
+
+std::vector<double> half(const std::vector<double>& v) {
+    std::vector<double> w(v);
+    for (unsigned int i=0; i<w.size(); i++)
+        w[i] /= 2.0;
+    return w;
+}
+
+void halve_in_place(std::vector<double>& v) {
+    // would you believe this is the same as the above?
+    std::transform(v.begin(),v.end(),v.begin(),
+                   std::bind2nd(std::divides<double>(),2.0));
+}
+
+

SWIG/Examples/mzscheme/std_vector/example.i

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+/* File : example.i */
+%module example
+
+%{
+#include "example.h"
+%}
+
+%include stl.i
+/* instantiate the required template specializations */
+namespace std {
+    %template(IntVector)    vector<int>;
+    %template(DoubleVector) vector<double>;
+}
+
+/* Let's just grab the original header file here */
+%include "example.h"
+

SWIG/Examples/mzscheme/std_vector/example.scm

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+;; run with mzscheme -r example.scm
+
+(load-extension "example.so")
+
+; repeatedly invoke a procedure with v and an index as arguments
+(define (with-vector v proc size-proc)
+  (let ((size (size-proc v)))
+    (define (with-vector-item v i)
+      (if (< i size)
+          (begin
+            (proc v i)
+            (with-vector-item v (+ i 1)))))
+    (with-vector-item v 0)))
+
+(define (with-intvector v proc)
+  (with-vector v proc intvector-length))
+(define (with-doublevector v proc)
+  (with-vector v proc doublevector-length))
+
+(define (print-doublevector v)
+  (with-doublevector v (lambda (v i) (display (doublevector-ref v i)) 
+                                     (display " ")))
+  (newline))
+
+
+; Call average with a Scheme list...
+
+(display (average '(1 2 3 4)))
+(newline)
+
+; ... or a wrapped std::vector<int>
+(define v (new-intvector 4))
+(with-intvector v (lambda (v i) (intvector-set! v i (+ i 1))))
+(display (average v))
+(newline)
+(delete-intvector v)
+
+; half will return a Scheme vector.
+; Call it with a Scheme vector...
+
+(display (half #(1 1.5 2 2.5 3)))
+(newline)
+
+; ... or a wrapped std::vector<double>
+(define v (new-doublevector))
+(map (lambda (i) (doublevector-push! v i)) '(1 2 3 4))
+(display (half v))
+(newline)
+
+; now halve a wrapped std::vector<double> in place
+(halve-in-place v)
+(print-doublevector v)
+(delete-doublevector v)
+