v11 type parameters & Go 1.18 mitigations (#21)

* v11: transition to go 1.18 type parameters (WIP)

* add interface implementation checks

* Checkpoint

* Initial ground zero

* Some updates to README (WIP)

* Makefile

* added common type aliases and improved tests

* more tests, tweaks

* re-org'ed files

* FlatMap

also fix go.mod versioning

* add Predicate

* added: predicate, stream.Filter

* added TestStream_ForEach

* doc updates

* added Stream.MapTo* generated code

* added: LeftReduce, Reduce and BiFunctions: Max, Min, Sum

* README, renamed a param

* Licence file

* README

* refined generated code (adding FlatMapTo* as well)

* added tests

* add ComparableStream with Max and Min

* add ComparableStream.Sum

* test branch for Issue 51957

See golang/go#51957

* Attempt to move forward with Go 1.18

* Add Average, replace Addable with Mathable

Small corrections

* added Stream.GroupBy

* added collectors

* added missing test

* README updates

* add optional + more collectors, etc

Author: seborama

.gitignore

@@ -15,3 +15,5 @@
 /.history/
 /research/
 research_*
+
+/bin

.golangci.yml

@@ -15,37 +15,6 @@ run:
   # include test files or not, default is true
   tests: false
 
-  # list of build tags, all linters use it. Default is empty list.
-  build-tags:
-  #  - mytag
-
-  # which dirs to skip: they won't be analyzed;
-  # can use regexp here: generated.*, regexp is applied on full path;
-  # default value is empty list, but next dirs are always skipped independently
-  # from this option's value:
-  #   	vendor$, third_party$, testdata$, examples$, Godeps$, builtin$
-  skip-dirs:
-    #- src/research
-
-  # which files to skip: they will be analyzed, but issues from them
-  # won't be reported. Default value is empty list, but there is
-  # no need to include all autogenerated files, we confidently recognize
-  # autogenerated files. If it's not please let us know.
-  skip-files:
-    #- ".*\\.my\\.go$"
-    #- lib/bad.go
-
-  # by default isn't set. If set we pass it to "go list -mod={option}". From "go help modules":
-  # If invoked with -mod=readonly, the go command is disallowed from the implicit
-  # automatic updating of go.mod described above. Instead, it fails when any changes
-  # to go.mod are needed. This setting is most useful to check that go.mod does
-  # not need updates, such as in a continuous integration and testing system.
-  # If invoked with -mod=vendor, the go command assumes that the vendor
-  # directory holds the correct copies of dependencies and ignores
-  # the dependency descriptions in go.mod.
-  #modules-download-mode: readonly|release|vendor
-
-
 # output configuration options
 output:
   # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
@@ -115,7 +84,7 @@ linters-settings:
     # Setting locale to US will correct the British spelling of 'colour' to 'color'.
     locale: UK
     ignore-words:
-      #- someword
+      - fuego
   lll:
     # max line length, lines longer will be reported. Default is 120.
     # '\t' is counted as 1 character by default, and can be changed with the tab-width option
@@ -170,17 +139,22 @@ linters-settings:
     #    sizeThreshold: 32
 
 linters:
-  #enable:
-  #  - megacheck
-  #  - govet
-  #  - maligned
-  #  - golint
+  # enable:
+  #   - cyclop
+  #   - gocognit
+  #   - gocyclo
+  #   - goerr113
+  #   - gofmt
+  #   - golint
+  #   - ifshort
+  #   - megacheck
   enable-all: true
   disable:
-    - gomnd
+    - forcetypeassert
+    - ireturn
     - lll
     - nlreturn
-    - wsl
+    - varnamelen
   disable-all: false
   #presets:
   #  - bugs

Makefile

@@ -5,19 +5,24 @@ endif
 
 .PHONY: deps
 deps:
-	go get -d -t -v ./...
+	go mod tidy && go mod download
 
 .PHONY: test
 test: deps
 	go test -timeout 5s -cover $(GORACE) -parallel 100
 
+.PHONY: generate
+generate: deps
+	go build -o bin/maptoXXX ./generate/maptoXXX.go
+	go generate
+
 .PHONY: lint
 lint: deps
 	@echo "=~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~="
 	./golangci-lint.sh
 
-.PHONY: mutations
-mutations: deps
-	@echo "=~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~="
-	./gomutesting.sh
+# .PHONY: mutations
+# mutations: deps
+# 	@echo "=~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~="
+# 	./gomutesting.sh