Python c Examples

Example #1

File: parser.py Project: t-14/langkit-query-language

    def patterns():
        """
        Return a list of the patterns that appear n the match
        expressions's arms.
        """
        return Self.arms.map(lambda x: x.pattern.as_entity)


lkql_grammar = Grammar('main_rule')
G = lkql_grammar
# noinspection PyTypeChecker
lkql_grammar.add_rules(
    main_rule=List(Or(G.decl, G.expr),
                   list_cls=TopLevelList),

    query=Query("select", c(), G.pattern),

    pattern=Or(FilteredPattern(G.unfiltered_pattern_optional_chain,
                               "when",
                               G.expr),
               G.unfiltered_pattern_optional_chain),

    unfiltered_pattern_optional_chain=Or(
        ChainedNodePattern(
            G.unfiltered_pattern,
            List(Or(
                SelectorLink(G.selector_call, "is", G.unfiltered_pattern),
                FieldLink(".", G.identifier, "=", G.unfiltered_pattern),
                PropertyLink(".", G.fun_call, "is", G.unfiltered_pattern)
            ))
        ),

Example #2

File: parser.py Project: raph-amiard/langkit-query-language

class Tuple(Expr):
    """
    Tuple expression.
    """
    exprs = Field(type=Expr.list)


lkql_grammar = Grammar('main_rule')
G = lkql_grammar

# noinspection PyTypeChecker
lkql_grammar.add_rules(
    main_rule=List(Or(G.decl, G.expr), list_cls=TopLevelList),
    query=Query(Opt("from", Or(G.expr, Unpack("*", G.expr))), "select", c(),
                G.pattern),
    pattern=Or(
        ChainedNodePattern(
            G.filtered_pattern,
            List(
                Or(SelectorLink(G.selector_call, "is", G.filtered_pattern),
                   FieldLink(".", G.id, "is", G.filtered_pattern),
                   PropertyLink(".", G.fun_call, "is", G.filtered_pattern)))),
        G.filtered_pattern),
    filtered_pattern=Or(FilteredPattern(G.binding_pattern, "when", G.expr),
                        G.binding_pattern),
    binding_pattern=Or(BindingPattern(G.id, "@", G.value_pattern),
                       G.value_pattern),
    value_pattern=Or(
        ExtendedNodePattern(

Example #3

File: parser.py Project: yannickmoy/langkit-query-language

# noinspection PyTypeChecker
lkql_grammar.add_rules(
    main_rule=List(
        Or(G.import_clause, G.decl, G.expr),
        list_cls=TopLevelList, empty_valid=True
    ),

    import_clause=Import("import", G.id),

    query=Query(
        Opt(
            "from",
            Or(G.expr, Unpack("*", G.expr))
        ),
        "select", c(), Or(
            QueryKind.alt_first(L.Identifier(match_text="first")),
            QueryKind.alt_all(),
        ), G.pattern
    ),

    pattern=Or(
        OrPattern(
            G.chained_node_pattern,
            "or",
            G.pattern
        ),
        G.chained_node_pattern
    ),

    chained_node_pattern=Or(

Example #4

    Tuple expression.
    """
    exprs = Field(type=Expr.list)


lkql_grammar = Grammar('main_rule')
G = lkql_grammar

# noinspection PyTypeChecker
lkql_grammar.add_rules(
    main_rule=List(Or(G.import_clause, G.decl, G.expr),
                   list_cls=TopLevelList,
                   empty_valid=True),
    import_clause=Import("import", G.id),
    query=Query(
        Opt("from", Or(G.expr, Unpack("*", G.expr))), "select", c(),
        Or(
            QueryKind.alt_first(L.Identifier(match_text="first")),
            QueryKind.alt_all(),
        ), G.pattern),
    pattern=Or(OrPattern(G.chained_node_pattern, "or", G.pattern),
               G.chained_node_pattern),
    chained_node_pattern=Or(
        ChainedNodePattern(
            G.filtered_pattern,
            List(
                Or(SelectorLink(G.selector_call, "is", G.filtered_pattern),
                   FieldLink(".", G.id, "is", G.filtered_pattern),
                   PropertyLink(".", G.fun_call, "is", G.filtered_pattern)))),
        G.filtered_pattern),
    filtered_pattern=Or(FilteredPattern(G.binding_pattern, "when", G.expr),