lex and parse types

1 files changed, 28 insertions, 0 deletions

diff --git a/lexer.py b/lexer.py
index aa2d107..3b93e41 100644
--- a/lexer.py
+++ b/lexer.py
@@ -55,6 +55,18 @@ class TokenType(Enum):
     # symbols
     SYMBOL = auto()
 
+    # types
+    INT_TYPE = auto()
+    FLOAT_TYPE = auto()
+    STRING_TYPE = auto()
+    ANY_TYPE = auto()
+
+types = {
+    ":int": TokenType.INT_TYPE,
+    ":float": TokenType.FLOAT_TYPE,
+    ":string": TokenType.STRING_TYPE,
+    ":any": TokenType.ANY_TYPE }
+
 keywords = {
     "print": TokenType.PRINT,
     "+": TokenType.PLUS,
@@ -123,6 +135,11 @@ def lex(data):
             tok, length = get_bool(data[current+1:], line)
             tokens.append(tok)
             current += length
+        #types
+        elif char == ":":
+            tok, length = get_type(data[current:], line) # include :
+            tokens.append(tok)
+            current += length
         # symbols
         else:
             tok, length = get_symbol(data[current:], line)
@@ -188,6 +205,17 @@ def get_symbol(data, line):
             break
     return Token(TokenType.SYMBOL, value, None, line), counter - 1
 
+def get_type(data, line):
+    counter = 0
+    value = ""
+    while data[counter] not in SEPARATORS:
+        value += data[counter]
+        counter += 1
+        if counter >= len(data):
+            break
+    if value not in types:
+        raise LexError(f"unrecognized type {value}", line)
+    return Token(types[value], value, None, line), counter - 1
 
 def main(data):
     try: