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.chglog (0, 2023-04-16)
.chglog\CHANGELOG.tpl.md (1009, 2023-04-16)
.chglog\config.yml (580, 2023-04-16)
.goreleaser.yml (838, 2023-04-16)
CREDITS (8369, 2023-04-16)
LICENSE (1064, 2023-04-16)
ast (0, 2023-04-16)
ast\ast.go (24600, 2023-04-16)
codecov.yml (228, 2023-04-16)
di (0, 2023-04-16)
di\container.go (7887, 2023-04-16)
di\eval.go (439, 2023-04-16)
di\main_test.go (11465, 2023-04-16)
di\readnative.go (1165, 2023-04-16)
di\readnative_test.go (3371, 2023-04-16)
di\streval.go (512, 2023-04-16)
di\streval_test.go (1355, 2023-04-16)
di\strevalenv.go (640, 2023-04-16)
di\strevalenv_test.go (1750, 2023-04-16)
docs (0, 2023-04-16)
docs\pictures (0, 2023-04-16)
docs\pictures\pangaea_logo.png (54089, 2023-04-16)
docs\reference (0, 2023-04-16)
docs\reference\array.md (627, 2023-04-16)
docs\reference\assignments.md (1139, 2023-04-16)
docs\reference\boolean.md (132, 2023-04-16)
docs\reference\break_lines.md (945, 2023-04-16)
docs\reference\calls.md (4472, 2023-04-16)
docs\reference\case.md (445, 2023-04-16)
docs\reference\chains.md (6850, 2023-04-16)
docs\reference\comments.md (253, 2023-04-16)
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# Pangaea programming language [](LICENSE) [](https://goreportcard.com/report/github.com/Syuparn/pangaea)  [](https://codecov.io/gh/Syuparn/Pangaea) [](https://syuparn.github.io/Pangaea/) [](https://syuparn.github.io/pangaea-travel-guide) [](./docs/reference/README.md) [](https://github.com/Syuparn/Pangaea/releases) # How to run ## Download Binary See [Releases](https://github.com/Syuparn/Pangaea/releases). ## Or Build Manually ```bash: $ git clone https://github.com/Syuparn/Pangaea.git $ cd ./Pangaea $ go generate $ go build ``` ## Or Use Pangaea Playground Visit https://syuparn.github.io/Pangaea/ ! Also, you can learn Pangaea syntax by an online tutorial [Pangaea Travel Guide](https://syuparn.github.io/pangaea-travel-guide). ## Run ```bash # Run REPL # (Linux, Mac) $ ./pangaea # (Windows) $ ./pangaea.exe # Run script file # (Linux, Mac) $ ./pangaea ./example/hello.pangaea # (Windows) $ ./pangaea.exe ./example/hello.pangaea # Enjoy! ``` ## What can I do? [Examples](https://github.com/Syuparn/Pangaea/tree/master/example) and [unit tests](https://github.com/Syuparn/Pangaea/tree/master/tests) will help you. Also, you can find properties of embedded objects by `.keys` method. ``` # properties of Obj starting with "a" >>> Obj.keys.grep("^a") ["acc", "all?", "ancestors", "any?", "append", "asFor?"] # with private properties >>> Obj.keys(private?: true) ["A", "B", "S", "acc", "all?", ...] # check which property is called >>> 1.which('+) Int >>> 1.which('p) Obj ``` # Requirements ## Host language - Golang (1.17+) ## Dependent Packages - [goyacc](https://godoc.org/golang.org/x/tools/cmd/goyacc) - [simplexer](https://github.com/macrat/simplexer) - [dtoa](https://github.com/tanaton/dtoa) - [dedent](https://github.com/lithammer/dedent) # Introduction (Let's run your REPL!) ## One-way! This language is tuned for a one-liner method chain! You don't have to go back to beginning of line! ``` "Hello, world!".puts # Hello, world! (1:5).A.sum.puts # 10 ``` Looks similar to other language though? But Chains in Pangaea has more power... ## Chain context Dot chain is "one of" the method chains in Pangaea. There are some kinds of chain styles, and each one shows different "context". (The concept is from Perl :) ) There are 3 kinds of chain context(`.`, `@`, `$`). ### Scalar Chain The receiver is left-side value, which is ordinary method chain. ``` 10.puts # 10 ``` ### List Chain The receiver is **each element of** left-side value. This can be used as "map" or "filter" in other languages. ``` [1, 2, 3]@{|i| i * 2}.puts # [2, 4, 6] ["foo", "var", "hoge"]@capital.puts # ["Foo", "Var", "Hoge"] # select only evens because nils are ignored (1:10)@{|i| i if i.even?}.puts # [2, 4, 6, 8] ``` ### Reduce Chain The receiver is **each element of** left-side value. Also, returned value of previous call is passed to 2nd argument. (In short, it's reduce!) ``` # reduce chain can hold initial value. [1, 2, 3]$(0){|acc, i| acc+i} # 6 # same as above [1, 2, 3]$(0)+ # 6 ``` ### Additional context Additional context can be prepended by main chain context. There are 3 kinds of additional chain context(`&`, `=`, `~`). Thus, there are 9 kinds (3 additional * 3 main) of context. #### Lonely Chain This chain ignores call and return `nil` if its receiver is `nil` (what a "lonely" object!), which works same as "lonely operator" in Ruby. ``` # nil.capital.puts # NoPropErr: property `capital` is not defined. nil&.capital.puts # nil [1, 2, nil, 4]&@F.puts # [1.000000, 2.000000, 4.000000] ``` #### Thoughtful Chain This chain returns receiver instead if returned value is `nil` (it "thoughtfully" repairs failed call). ``` (1:16)~@{|i| ['fizz][i%3] + ['buzz][i%5]}.puts # [1, 2, "fizz", 4, "buzz", ..., "fizzbuzz"] (3:20)~$([2]){|acc, n| [*acc, n] if acc.all? {|p| n % p}}.puts # [2, 3, 5, ..., 19] # (Of course you can use built-in prime function) 20.select {.prime?}.puts # [2, 3, 5, ..., 19] ``` #### Strict Chain This chain keeps returned `nil` value ("strictly" returns the calclation result). This is useful only in list context, which removes returned `nil`. ``` (1:10)@{|i| i if i.even?}.puts # [2, 4, 6, 8] (1:10)=@{|i| i if i.even?}.puts # [nil, 2, nil, 4, nil, 6, nil, 8, nil] ``` # Language Features - **Readable one-liner** - Interpreted - Dynamically typed - Prototype-based object oriented - Everything is object - Immutable objects - First-class functions with lexical scopes - Method chains with context (see above for details) - Metaprogramming with magic methods (e.g: `_missing`, `asFor?`) See [Language Reference](./docs/reference/README.md) for more information. # For Developers ## Directories |name|description| |-|-| |.chglog|template of release note| |.github|GitHub actions| |ast|definition of AST| |di|inject native properties into built-in objects| |docs|language spec reference| |evaluator|evaluator with built-in prop tests| |example|pangaea example snippets| |native|native properties written in Pangaea| |object|definition of Pangaea object system| |parser|parser generated from goyacc grammer| |props|built-in properties written in Go| |runscript|handle interpreter and REPL| |tests|native property tests written in Pangaea| |third_party|patched dependant Go modules| |web|Pangaea Playground| ## Release Release note and binary is generated automatically by Goreleaser. You only need to push a new tag to origin. Tag name is set to the binary version (shown by `-v`). # Contribution Any contribution is welcome!

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