Function parse_expr

numpy/_build_utils/tempita/_tempita.py:767–811

(tokens, name, context=())

def parse_expr(tokens, name, context=()):
    if isinstance(tokens[0], basestring_):
        return tokens[0], tokens[1:]
    expr, pos = tokens[0]
    expr = expr.strip()
    if expr.startswith("py:"):
        expr = expr[3:].lstrip(" \t")
        if expr.startswith(("\n", "\r")):
            expr = expr.lstrip("\r\n")
            if "\r" in expr:
                expr = expr.replace("\r\n", "\n")
                expr = expr.replace("\r", "")
            expr += "\n"
        elif "\n" in expr:
            raise TemplateError(
                "Multi-line py blocks must start with a newline",
                position=pos,
                name=name,
            )
        return ("py", pos, expr), tokens[1:]
    elif expr in ("continue", "break"):
        if "for" not in context:
            raise TemplateError("continue outside of for loop", position=pos, name=name)
        return (expr, pos), tokens[1:]
    elif expr.startswith("if "):
        return parse_cond(tokens, name, context)
    elif expr.startswith("elif ") or expr == "else":
        raise TemplateError(
            f"{expr.split()[0]} outside of an if block", position=pos, name=name
        )
    elif expr in ("if", "elif", "for"):
        raise TemplateError(f"{expr} with no expression", position=pos, name=name)
    elif expr in ("endif", "endfor", "enddef"):
        raise TemplateError(f"Unexpected {expr}", position=pos, name=name)
    elif expr.startswith("for "):
        return parse_for(tokens, name, context)
    elif expr.startswith("default "):
        return parse_default(tokens, name, context)
    elif expr.startswith("inherit "):
        return parse_inherit(tokens, name, context)
    elif expr.startswith("def "):
        return parse_def(tokens, name, context)
    elif expr.startswith("#"):
        return ("comment", pos, tokens[0][0]), tokens[1:]
    return ("expr", pos, tokens[0][0]), tokens[1:]


def parse_cond(tokens, name, context):