https://github.com/aaroncoplan/waterfall

https://github.com/aaroncoplan/waterfall

Last synced: 7 days ago
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• Host: GitHub
• URL: https://github.com/aaroncoplan/waterfall
• Owner: AaronCoplan
• Created: 2019-02-05T23:48:47.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2020-11-26T01:20:37.000Z (about 4 years ago)
• Last Synced: 2024-11-09T12:36:25.066Z (2 months ago)
• Language: Java
• Size: 303 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Waterfall

### Setup

1. Ensure Java and Java Compiler are installed

2. Install Java dependencies and build the jar: `./gradlew build`

### Run

Once you've built the runnable jar, you can run the compiler in one of two ways:

1. Execute the jar directly: `java -jar compiler/build/libs/compiler-0.0.1.jar `

2. Use the shortcut script: `./waterfall `

### Syntax Design

- Assignments: `=`, `:=`

- Operators: `/`, `*`, `+`, `-`, `%`, `^`

- Primitive Types: `int`, `dec`, `bool`, `char`

- Control: `if`, `elif`, `else`, `for`, `while`, `in`

- Conditionals / Comparators: `and`, `or`, `equals`, `<`, `>`, `<=`, `>=`

- Modifiers: `const`, `final`

- Functions: `func`, `returns`

- Containers: `module`, `type`, `spec`

- Casting: `castas`

- Return: `return`

### Examples

**Find the sum of all the multiples of 3 or 5 below 1000.**

```

int sum = 0

for(int num = 1; num < 1000; num++) {

  if(sum % 3 equals 0 or sum % 5 equals 0) {

    sum += num

  }

}

print(sum)

```

**Determine whether a string can be formed from the characters in another.**

```

func canBeFormed(char[] characters, char[] word) returns bool {

  const asciiOffset := 97

  const letterCounts := int[].create(26)

  for(char c in characters) {

    const charVal := c castas int

    letterCounts[charVal - asciiOffset]++

  }

  for(char c in word) {

    const charVal := c castas int

    letterCounts[charVal - asciiOffset]--

    if(letterCounts[charVal - asciiOffset] < 0) {

      return false

    }

  }

  return true

}

```