refactor: make neb a module

1 files changed, 67 insertions, 0 deletions

diff --git a/neb/parser.py b/neb/parser.py
new file mode 100644
index 0000000..ea875fb
--- /dev/null
+++ b/neb/parser.py
@@ -0,0 +1,67 @@
+from .structs import *
+
+def parseExpression(token, prev, tokens):
+    idx = 0
+    args = []
+    prev = token
+    while tokens[idx].type_ != TokenType.CLOSE_PAREN:
+        token = tokens[idx]
+        inc = 1
+        if token.type_ == TokenType.OPEN_PAREN:
+            expr, inc = parseExpression(token, prev, tokens[idx+1:])
+            args.append(expr)
+        elif token.type_ in (TokenType.STRING, TokenType.TRUE, TokenType.FALSE, TokenType.INT, TokenType.FLOAT):
+            expr, inc = parseLiteral(token, prev, tokens[idx+1:])
+            args.append(expr)
+        elif token.type_ in (TokenType.INT_TYPE, TokenType.FLOAT_TYPE, TokenType.STRING_TYPE, TokenType.ANY_TYPE, TokenType.LIST_TYPE, TokenType.NUMBER_TYPE, TokenType.BOOL_TYPE, TokenType.LITERAL_TYPE):
+            expr, inc = parseType(token, prev, tokens[idx+1:])
+            args.append(expr)
+        else:
+            expr, inc = parseSymbol(token, prev, tokens[idx+1:])
+            args.append(expr)
+        idx += inc
+        prev = token
+    
+    return List(args), idx + 2  # parens
+
+def parseSymbol(token, prev, tokens):
+    return Symbol(token.text, token.line), 1
+
+def parseLiteral(token, prev, tokens):
+    if token.type_ == TokenType.STRING:
+        return String(token.value), 1
+    elif token.type_ == TokenType.INT:
+        return Int(token.value), 1
+    elif token.type_ == TokenType.FLOAT:
+        return Float(token.value), 1
+    elif token.type_ in (TokenType.TRUE, TokenType.FALSE):
+        return Bool(token.value), 1
+    else:
+        return Literal(token.value), 1
+
+def parseType(token, prev, tokens):
+    return Type(token.text), 1
+
+def parse(tokens):
+    idx = 0
+    prev = None
+    exprs = []
+    while tokens[idx].type_ != TokenType.EOF:
+        token = tokens[idx]
+        counter = 1
+        if token.type_ == TokenType.OPEN_PAREN:
+            expr, counter = parseExpression(token, prev, tokens[idx+1:])
+            exprs.append(expr)
+        elif token.type_ in (TokenType.FALSE, TokenType.TRUE, TokenType.STRING, TokenType.INT, TokenType.FLOAT):
+            lit, counter = parseLiteral(token, prev, tokens[idx+1:])
+            exprs.append(lit)
+        elif token.type_ in (TokenType.INT_TYPE, TokenType.FLOAT_TYPE, TokenType.STRING_TYPE, TokenType.ANY_TYPE, TokenType.LIST_TYPE, TokenType.NUMBER_TYPE, TokenType.BOOL_TYPE, TokenType.LITERAL_TYPE):
+            typ, counter = parseType(token, prev, tokens[idx+1:])
+            exprs.append(typ)
+        else:
+            sym, counter = parseSymbol(token, prev, tokens[idx+1:])
+            exprs.append(sym)
+        
+        idx += counter
+        prev = token
+    return exprs