Initial Commit

src/error.py

@@ -0,0 +1,5 @@
+def error(errorType: str = 'Error', message: str = "This is a bugged error message. Please report this issue."):
+    return f"\033[91m{errorType}: \033[0m{message}"
+    
+def warn(message: str):
+    return f"\033[33mWarning: {message}\033[0m"

src/interpreter.py

@@ -0,0 +1,13 @@
+import parser as p
+import error as err
+import sys
+
+# Feel free to replace the return type
+def run_program(parsed: list[p.ParsedLine]) -> None:
+    for line in parsed:
+        match line.keyword:
+            case p.Keyword.Default:
+                sys.exit(err.error('unknownError', 'This is a bugged error message that should never be reached.'))
+            # Add implementation for other commands here
+            case _:
+                sys.exit(err.error('notImplementedError', f'{line.keyword.value} keyword not implemented yet'))

src/lexer.py

@@ -0,0 +1,39 @@
+def tokenise(code: str) -> list[list[str]]:
+    token: str = ''
+    tokens: list[list[str]] = [[]]
+    
+    isString = False
+    isComment = False
+    
+    for char in code:
+        if isString:
+            token += char
+            if char == '"' or char == "'":
+                isString = False
+        elif isComment and char != '\n':
+            pass
+        else:
+            match char:
+                case '\n':
+                    isComment = False
+                    if token != '' or tokens[-1] != []:
+                        if token != '':
+                            tokens[-1].append(token)
+                        token = ''
+                        tokens.append([])
+                case ' ':
+                    tokens[-1].append(token)
+                    token = ''
+                case '\'':
+                    isString = True
+                    token += '\''
+                case '\"':
+                    isString = True
+                    token += '\"'
+                case '#':
+                    isComment = True
+                case _:
+                    token += char
+    if token:
+        tokens[-1].append(token)
+    return tokens

src/main.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+
+import sys
+import lexer
+import parser
+import interpreter
+import error as err
+
+def main(argc: int, argv: list[str]):
+    if argc < 3:
+        return f'Usage: {argv[0]} (filename) (writefile) (flags)'
+
+    try:
+        with open(argv[1], 'r') as file:
+            content = file.read()
+    except FileNotFoundError:
+        return err.error(f'File {argv[1]} not found.')
+        
+    tokens = lexer.tokenise(content)
+    nodes = parser.parse(tokens)
+    interpreter.run_program(nodes)
+    return 0
+
+if __name__ == "__main__":
+    sys.exit(main(len(sys.argv), sys.argv))

src/parser.py

@@ -0,0 +1,145 @@
+from enum import Enum
+import error as err
+import sys
+
+class Keyword(Enum):
+    Default = -1
+    # All below can be replaced
+    If = 'if'
+    Jump = 'jump'
+    End = 'end'
+    Stdin = 'stdin'
+    Stdout = 'stdout'
+    Stdlnout = 'stdlnout'
+    Set = 'set'
+    Gettype = 'gettype'
+    Exists = 'exists'
+    Setlist = 'setlist'
+    Setlistat = 'setlistat'
+    Getlistat = 'getlistat'
+    Getlistsize = 'getlistsize'
+    Listappend = 'listappend'
+    Getstrsize = 'getstrsize'
+    Getstrcharat = 'getstrcharat'
+    Add = 'add'
+    Subtract = 'subtract'
+    Multiply = 'multiply'
+    Divide = 'divide'
+    Equal = 'equal'
+    Inequal = 'inequal'
+    Not = 'not'
+    Greater = 'greater'
+    Lesser = 'lesser'
+    Stoi = 'stoi'
+    Stod = 'stod'
+    Tostring = 'tostring'
+    Fun = 'fun'
+    Return = 'return'
+    Endfun = 'endfun'
+    Pusharg = 'pusharg'
+    Call = 'call'
+    Struct = 'struct'
+    Endstruct = 'endstruct'
+    Init = 'init'
+    Use = 'use'
+    Extern = 'extern'
+
+class ArgType(Enum):
+    Keyword = 0 # e.g. end if
+    Value = 1 # e.g. println $var
+    Direct = 2 # e.g. setlist &var
+    Line = 3 # e.g. jump %start
+    Function = 4 # e.g. call !doStuff
+    Type = 5 # e.g. call -int ...
+    Literal_String = 6 # e.g. println "Hello, world!"
+    Literal_Int = 7 # e.g. println 97104
+    Literal_Char = 8 # e.g. println 'a'
+    
+keywords: dict[str, Keyword] = {
+    '': Keyword.Default,
+    # All below can be replaced
+    'if': Keyword.If,
+    'jump': Keyword.Jump,
+    'end': Keyword.End,
+    'input': Keyword.Stdin,
+    'stdin': Keyword.Stdin,
+    'print': Keyword.Stdout,
+    'stdout': Keyword.Stdout,
+    'println': Keyword.Stdlnout,
+    'stdlnout': Keyword.Stdlnout,
+    'set': Keyword.Set,
+    'gettype': Keyword.Gettype,
+    'exists': Keyword.Exists,
+    'setlist': Keyword.Setlist,
+    'setlistat': Keyword.Setlistat,
+    'getlistat': Keyword.Getlistat,
+    'getlistsize': Keyword.Getlistsize,
+    'listappend': Keyword.Listappend,
+    'getstrsize': Keyword.Getstrsize,
+    'getstrcharat': Keyword.Getstrcharat,
+    'add': Keyword.Add,
+    'subtract': Keyword.Subtract,
+    'multiply': Keyword.Multiply,
+    'divide': Keyword.Divide,
+    'equal': Keyword.Equal,
+    'inequal': Keyword.Inequal,
+    'not': Keyword.Not,
+    'greater': Keyword.Greater,
+    'lesser': Keyword.Lesser,
+    'stoi': Keyword.Stoi,
+    'stod': Keyword.Stod,
+    'tostring': Keyword.Tostring,
+    'fun': Keyword.Fun,
+    'return': Keyword.Return,
+    'endfun': Keyword.Endfun,
+    
+}
+
+class ParsedLine:
+    def __init__(self, keyword = '', args=[]):
+        self.keyword: Keyword = keywords[keyword]
+        self.args: list[tuple[ArgType, str]] = args
+    def __repr__(self):
+        return f'({self.keyword}, {self.args})'
+
+def parse(tokens: list[list[str]]) -> list[ParsedLine]: 
+    parsed_lines: list[ParsedLine] = []
+    for line in tokens:
+        parsed = ParsedLine('', [])
+        try:
+            parsed.keyword = keywords[line[0]]
+        except KeyError:
+            sys.exit(err.error('syntaxError', f'Invalid keyword: {line[0]}'))
+        
+        for arg in line[1:]:
+            match arg[0]:
+                case '$':
+                    parsed.args.append((ArgType.Value, arg[1:]))
+                case '&':
+                    parsed.args.append((ArgType.Direct, arg[1:]))
+                case '%':
+                    parsed.args.append((ArgType.Line, arg[1:]))
+                case '!':
+                    parsed.args.append((ArgType.Function, arg[1:]))
+                case '-':
+                    parsed.args.append((ArgType.Type, arg[1:]))
+                case _:
+                    # Todo
+                    if arg[0] == arg[-1] == '\'':
+                        if len(arg) != 3:
+                            sys.exit(err.error('typeError', f'Invalid char: {arg}'))
+                        parsed.args.append((ArgType.Literal_Char, arg[1]))
+                    elif arg[0] == arg[-1] == '\"':
+                        parsed.args.append((ArgType.Literal_String, arg[1:-1]))
+                    else:
+                        try:
+                            parsed.args.append((ArgType.Literal_Int, str(int(arg))))
+                        except ValueError:
+                            try:
+                                parsed.args.append((ArgType.Keyword, arg))
+                            except AttributeError:
+                                sys.exit(err.error('syntaxError', f'Invalid literal: {arg}'))
+        
+        parsed_lines.append(parsed)
+    
+    return parsed_lines