finish "parsing" of hello.jt
the AST is very ugly as it is rn. had to remove the cleanups or else its all [[None], [None], ...] ok im startnig to give up on doing handwritten lmao help - add TokenType.string - add read_value, read_statement, fix block reading
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4 changed files with 61 additions and 15 deletions
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@ -5,6 +5,7 @@ import io
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// main can return int or void, void mains are handled by jortsc
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fn main () -> int {
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io.puts("pants")
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// todo: put it back to io.puts
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ioputs("pants")
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0
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}
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@ -27,3 +27,19 @@ class Identifier:
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@dataclass
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class Import:
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module: str
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@dataclass
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class String:
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value: str
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@dataclass
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class Number:
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value: str
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@dataclass
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class FunctionCall:
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function: str
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args: list
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@ -13,6 +13,7 @@ class TokenType(Enum):
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comment_end = auto()
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whitespace = auto()
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number = auto()
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string = auto()
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@dataclass
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@ -50,7 +51,7 @@ TOKENS = [
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(r'\-\>', TokenType.reserved),
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(r'\.', TokenType.reserved),
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(r'\"[^\n]*\"', TokenType.reserved),
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(r'\"[^\n]*\"', TokenType.string),
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# basic math ops
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(r'[\+\-\/\*]', TokenType.reserved),
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@ -2,7 +2,8 @@ from typing import Optional, Any, List
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from jortsc.parser.lexer import Token, TokenType
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from jortsc.parser.ast_nodes import (
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Function, TypedVar, Identifier, Import, ReturnType
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Function, TypedVar, Identifier, Import, ReturnType, String, Number,
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FunctionCall
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)
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@ -18,7 +19,8 @@ class Reader:
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self.cur = 0
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def __repr__(self):
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return f'<Reader cur={self.cur} cur_tok={self.peek()}>'
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return (f'<Reader cur={self.cur} tot={len(self.tokens)} '
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f'cur_tok={self.peek()}>')
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def peek(self) -> Optional[Token]:
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"""Peek at the current token."""
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@ -168,6 +170,34 @@ def read_reserved(token: Token, reader: Reader):
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return handler(reader)
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def read_value(token: Token, _reader: Reader):
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"""Read a given value"""
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if token.type_ == TokenType.string:
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return String(token.value)
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elif token.type_ == TokenType.number:
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return Number(token.value)
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def read_statement(token: Token, reader: Reader):
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"""Read a statement"""
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# token is an identifier, so first check for a function call
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# TODO: handle more things than a function call
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call_fn_name = token.value
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token = reader.expect_val('(')
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res = []
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while True:
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token = reader.next_safe()
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if token.value == ')':
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break
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res.append(read_value(token, reader))
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return FunctionCall(call_fn_name, res)
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def read_start(reader: Reader):
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"""Read the start of a program."""
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print('reader', reader)
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@ -181,8 +211,6 @@ def read_start(reader: Reader):
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ast = []
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res = []
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print('cur', token)
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# handle blocks
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if token.value == '{':
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# next can be a whitespace, or a }
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@ -193,10 +221,12 @@ def read_start(reader: Reader):
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if token.type_ == TokenType.whitespace:
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# keep going on reading
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while True:
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token = reader.next()
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print(token)
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token = reader.peek()
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print('block append', token)
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if token.value == '}':
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print('block end')
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reader.next()
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break
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res.extend(read_start(reader))
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@ -211,7 +241,9 @@ def read_start(reader: Reader):
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return []
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elif token.type_ == TokenType.identifier:
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res = [Identifier(token.value)]
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res = read_statement(token, reader)
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else:
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res = read_value(token, reader)
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ast.append(res)
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return ast
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@ -228,13 +260,9 @@ def read_loop(reader: Reader):
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if ast is None:
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break
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try:
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inner = ast[0]
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except IndexError:
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inner = None
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# TODO: better ast cleanup
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if ast and not inner:
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final_ast.append(ast)
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final_ast.append(ast)
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return final_ast
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