feat(def_flow): recognize .def names propagated via variables and wrapper procs
Add a new def_flow analysis module that follows .def block template and address names through local variables and proc parameters, and a wrapper-table builder to resolve proc arguments that forward .def names. Derived names are resolved only for hover/definition (not for rename). Integrate this into the LSP: - lsp_server: add _word_at and _tcl_def_symbol helpers; fallback to derived_def_symbol when direct NX-argument navigation fails for hover, goto-definition and references; return proper ranges for hover. - lsp_tclserver: cache and expose a def_wrapper_table built from index def_flows (with cache invalidation on index generation). Also add unit tests for def_flow and update CHANGELOG to note hover/ definition and completion preview improvements for derived names.
This commit is contained in:
@@ -0,0 +1,340 @@
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"""Follow .def block template and address names through variables and procs.
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A name is only a .def symbol where it provably reaches an NX command taking one:
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directly as an argument (``MOM_do_template steady_rest``), through a variable
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of the same scope (``set t steady_rest; MOM_do_template $t``) or through the
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parameter of a proc that passes it on (``LIB_SPF_call_cycle absolute_mode``).
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Derived names are resolved for hover and definition only, never renamed.
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"""
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from __future__ import annotations
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import re
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from collections import defaultdict
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from collections.abc import Iterable, Iterator
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import lsprotocol.types as lsp
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from tclint.syntax_tree import BracedWord, Command, CommandSub, List, Node, QuotedWord, Script, VarSub
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from tools.tcl_command_completion import TCL_COMMAND_NAMES
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ROOT_NAMESPACE = "::"
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DEF_BLOCK_TEMPLATE = "block_template"
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DEF_ADDRESS = "address"
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DEF_SYMBOL_KINDS = frozenset({DEF_BLOCK_TEMPLATE, DEF_ADDRESS})
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# NX commands taking .def names: command -> (first argument index, last index or
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# None for all following arguments, kind).
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_DEF_ARGUMENTS: dict[str, tuple[tuple[int, int | None, str], ...]] = {
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"MOM_do_template": ((0, 0, DEF_BLOCK_TEMPLATE),),
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"MOM_add_to_block_buffer": ((0, 0, DEF_BLOCK_TEMPLATE),),
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"MOM_polar_motion": ((0, 0, DEF_BLOCK_TEMPLATE),),
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"MOM_force_block": ((1, None, DEF_BLOCK_TEMPLATE),),
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"MOM_ask_address_value": ((0, 0, DEF_ADDRESS),),
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"MOM_add_to_address_buffer": ((0, 0, DEF_ADDRESS),),
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"MOM_enable_address": ((0, None, DEF_ADDRESS),),
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"MOM_disable_address": ((0, None, DEF_ADDRESS),),
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"MOM_force": ((1, None, DEF_ADDRESS),),
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"MOM_suppress": ((1, None, DEF_ADDRESS),),
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"MOM_incremental": ((1, None, DEF_ADDRESS),),
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}
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_DEFINITION_ELEMENT_COMMANDS = frozenset({"MOM_ask_definition_element", "MOM_has_definition_element"})
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_DEFINITION_ELEMENT_KINDS = {"ADDRESS": DEF_ADDRESS, "BLOCK": DEF_BLOCK_TEMPLATE}
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# Commands that never pass a .def name on to a proc parameter.
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_NON_FORWARDING = (
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frozenset(TCL_COMMAND_NAMES)
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| frozenset(_DEF_ARGUMENTS)
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| _DEFINITION_ELEMENT_COMMANDS
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| frozenset({
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"set", "unset", "puts", "expr", "return", "incr", "append", "lappend", "list", "lindex", "lrange",
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"llength", "lsearch", "lsort", "lreverse", "lassign", "concat", "join", "split", "format", "regsub",
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"regexp", "string", "if", "while", "for", "foreach", "lmap", "switch", "catch", "eval", "uplevel",
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"upvar", "global", "variable", "info", "array", "dict", "subst", "error", "proc", "namespace",
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})
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)
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# Commands returning (elements of) their first argument's list value.
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_LIST_ACCESSORS = frozenset({"lindex", "lrange", "lsort", "lreverse", "lsearch"})
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_LIST_WORD_RE = re.compile(r'"([^"\s{}]*)"|([^\s"{}]+)')
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# ("def", kind) or ("call", routine, argument index) where a variable ends up.
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FlowTarget = tuple
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# Fact: ("sink", variable, target) or ("edge", destination, source variable).
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FlowFact = tuple
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# Per proc: ((parameter index, ("def", kind) | ("call", qualified, fallback, index)), ...)
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ProcDefFlows = tuple[tuple[int, tuple], ...]
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WrapperTable = dict[str, dict[int, frozenset[str]]]
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def static_contents(node: Node | None) -> str | None:
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value = getattr(node, "contents", None)
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return value if isinstance(value, str) else None
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def def_argument_kinds(command: Command) -> list[tuple[Node, str]]:
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"""Return the arguments of ``command`` that name a .def block template or address."""
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routine = static_contents(command.routine)
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if routine in _DEFINITION_ELEMENT_COMMANDS:
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kind = _DEFINITION_ELEMENT_KINDS.get((static_contents(command.args[0]) or "").upper()) if command.args else None
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return [(command.args[1], kind)] if kind and len(command.args) >= 2 else []
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result = []
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for first, last, kind in _DEF_ARGUMENTS.get(routine or "", ()):
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for position, argument in enumerate(command.args):
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if position >= first and (last is None or position <= last):
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result.append((argument, kind))
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return result
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def def_name(node: Node) -> str | None:
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name = static_contents(node)
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if not name or node.contents_pos is None or any(char.isspace() or char in "$[]{}\\\"" for char in name):
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return None
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return name
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def qualify(name: str, namespace: str) -> str:
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if name.startswith("::"):
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return name
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return f"::{name}" if namespace == ROOT_NAMESPACE else f"{namespace}::{name}"
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def _variable_reference(node: Node) -> str | None:
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"""Name of the scalar variable ``node`` consists of: ``$v`` or ``"$v"``."""
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if isinstance(node, QuotedWord) and len(node.children) == 1:
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node = node.children[0]
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if isinstance(node, VarSub) and isinstance(node.value, str) and "(" not in node.value:
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return node.value
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return None
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def _value_sources(node: Node) -> list[str]:
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"""Variables whose value or list elements ``node`` copies."""
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variable = _variable_reference(node)
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if variable is not None:
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return [variable]
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if isinstance(node, CommandSub) and len(node.children) == 1 and isinstance(node.children[0], Command):
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inner = node.children[0]
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routine = static_contents(inner.routine)
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if routine in _LIST_ACCESSORS and inner.args:
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return _value_sources(inner.args[0])
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if routine in {"list", "concat"}:
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return [source for argument in inner.args for source in _value_sources(argument)]
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return []
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def _bound_names(node: Node) -> list[str]:
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nodes = node.children if isinstance(node, List) else [node]
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names = [static_contents(child) for child in nodes]
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if len(names) == 1 and names[0] and " " in names[0]:
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return names[0].split()
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return [name for name in names if name]
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def command_flow_facts(command: Command) -> list[FlowFact]:
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"""Facts on how ``command`` moves variable values towards .def arguments."""
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routine = static_contents(command.routine)
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args = command.args
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facts: list[FlowFact] = [
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("sink", variable, ("def", kind))
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for node, kind in def_argument_kinds(command)
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if (variable := _variable_reference(node)) is not None
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]
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if routine == "set" and len(args) == 2:
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destination = static_contents(args[0])
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if destination:
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facts.extend(("edge", destination, source) for source in _value_sources(args[1]))
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elif routine == "lappend" and args:
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destination = static_contents(args[0])
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if destination:
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facts.extend(("edge", destination, source) for argument in args[1:] for source in _value_sources(argument))
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elif routine in {"foreach", "lmap"} and len(args) >= 3:
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for position in range(0, len(args) - 1, 2):
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sources = _value_sources(args[position + 1])
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facts.extend(("edge", name, source) for name in _bound_names(args[position]) for source in sources)
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elif routine == "lassign" and args:
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sources = _value_sources(args[0])
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facts.extend(("edge", name, source) for node in args[1:] if (name := static_contents(node)) for source in sources)
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elif routine and routine not in _NON_FORWARDING:
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facts.extend(
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("sink", variable, ("call", routine, position))
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for position, argument in enumerate(args)
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if (variable := _variable_reference(argument)) is not None
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)
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return facts
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def solve_flow(facts: Iterable[FlowFact]) -> dict[str, set[FlowTarget]]:
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"""Map each variable to the .def arguments and proc parameters it reaches."""
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targets: dict[str, set[FlowTarget]] = defaultdict(set)
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sources: dict[str, set[str]] = defaultdict(set)
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for fact in facts:
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if fact[0] == "sink":
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targets[fact[1]].add(fact[2])
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elif fact[1] != fact[2]:
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sources[fact[1]].add(fact[2])
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pending = [variable for variable in targets if variable in sources]
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while pending:
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destination = pending.pop()
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for source in sources.get(destination, ()):
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before = len(targets[source])
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targets[source] |= targets[destination]
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if len(targets[source]) != before:
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pending.append(source)
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return targets
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def proc_def_flows(facts: Iterable[FlowFact], parameters: list[str], namespace: str) -> ProcDefFlows:
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"""Where the parameters of a proc end up, with qualified callee names."""
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targets = solve_flow(facts)
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flows = []
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for position, parameter in enumerate(parameters):
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if parameter == "args" and position == len(parameters) - 1:
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break
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for target in targets.get(parameter, ()):
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if target[0] == "call":
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target = ("call", qualify(target[1], namespace), qualify(target[1], ROOT_NAMESPACE), target[2])
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flows.append((position, target))
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return tuple(sorted(flows))
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def build_wrapper_table(procs: Iterable[tuple[str, ProcDefFlows]]) -> WrapperTable:
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"""Resolve which proc arguments take .def names, following nested wrappers."""
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kinds: dict[str, dict[int, set[str]]] = defaultdict(lambda: defaultdict(set))
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calls = []
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for proc, flows in procs:
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for position, target in flows:
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if target[0] == "def":
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kinds[proc][position].add(target[1])
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else:
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calls.append((proc, position, target[1], target[2], target[3]))
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changed = True
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while changed:
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changed = False
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for proc, position, callee, fallback, callee_position in calls:
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entry = kinds.get(callee) or kinds.get(fallback)
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found = entry.get(callee_position) if entry else None
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if found and not found <= kinds[proc][position]:
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kinds[proc][position] |= found
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changed = True
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return {
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proc: {position: frozenset(names) for position, names in positions.items() if names}
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for proc, positions in kinds.items()
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if any(positions.values())
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}
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def _wrapper_kinds(table: WrapperTable, routine: str, position: int, namespace: str) -> frozenset[str]:
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entry = table.get(qualify(routine, namespace)) or table.get(qualify(routine, ROOT_NAMESPACE))
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return entry.get(position, frozenset()) if entry else frozenset()
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def _target_kinds(target: FlowTarget, table: WrapperTable, namespace: str) -> frozenset[str]:
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if target[0] == "def":
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return frozenset({target[1]})
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return _wrapper_kinds(table, target[1], target[2], namespace)
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def _scope_commands(script: Node) -> Iterator[Command]:
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"""Commands of one scope, without the bodies of procs defined in it."""
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for child in getattr(script, "children", []):
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if isinstance(child, Command):
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yield child
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if static_contents(child.routine) == "proc":
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continue
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yield from _scope_commands(child)
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def _contains(node: Node, point: tuple[int, int]) -> bool:
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return node.pos is not None and node.end_pos is not None and node.pos <= point < node.end_pos
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def _path_at(tree: Node, point: tuple[int, int]) -> list[Node]:
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path = [tree]
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while True:
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child = next((child for child in getattr(path[-1], "children", []) if _contains(child, point)), None)
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if child is None:
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return path
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path.append(child)
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def _literal_at(node: Node, point: tuple[int, int]) -> tuple[str, lsp.Range] | None:
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"""The single name ``node`` holds, or the list element of a braced word at ``point``."""
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if isinstance(node, BracedWord):
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contents = static_contents(node)
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if contents is None or node.contents_pos is None:
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return None
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line, column = node.contents_pos
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for match in _LIST_WORD_RE.finditer(contents):
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start = match.start(1) if match.group(1) is not None else match.start(2)
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name = match.group(1) if match.group(1) is not None else match.group(2)
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before = contents[:start]
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element_line = line + before.count("\n")
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element_column = (start - before.rfind("\n") if "\n" in before else column + start)
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if element_line == point[0] and element_column <= point[1] < element_column + len(name):
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return name, _range(element_line, element_column, name)
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return None
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name = def_name(node)
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if name is None:
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return None
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line, column = node.contents_pos
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return name, _range(line, column, name)
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def _range(line: int, column: int, name: str) -> lsp.Range:
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return lsp.Range(
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start=lsp.Position(line=line - 1, character=column - 1),
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end=lsp.Position(line=line - 1, character=column - 1 + len(name)),
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)
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def _literal_targets(commands: list[Command], values: list[Node]) -> tuple[list[str], list[FlowTarget]]:
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"""Variables and proc arguments a literal flows into; ``values`` are its enclosing words."""
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command, value = commands[-1], values[-1]
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routine = static_contents(command.routine)
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args = list(command.args)
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position = next((index for index, argument in enumerate(args) if argument is value), None)
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if position is None:
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return [], []
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if routine in {"list", "concat"} and len(commands) >= 2 and isinstance(values[-2], CommandSub):
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return _literal_targets(commands[:-1], values[:-1])
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if routine == "set" and position == 1:
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destination = static_contents(args[0])
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return ([destination] if destination else []), []
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if routine == "lappend" and position >= 1:
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destination = static_contents(args[0])
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return ([destination] if destination else []), []
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if routine in {"foreach", "lmap"} and position % 2 == 1 and position < len(args) - 1:
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return _bound_names(args[position - 1]), []
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if routine and routine not in _NON_FORWARDING:
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return [], [("call", routine, position)]
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return [], []
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def derived_def_symbol(
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tree: Node, position: lsp.Position, table: WrapperTable
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) -> tuple[frozenset[str], str, lsp.Range] | None:
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"""Kinds, name and range of a literal that reaches a .def argument indirectly."""
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point = (position.line + 1, position.character + 1)
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path = _path_at(tree, point)
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commands: list[Command] = []
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values: list[Node] = []
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scope: Node = tree
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namespace = ROOT_NAMESPACE
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for parent, child in zip(path, path[1:]):
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if isinstance(parent, Command):
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commands.append(parent)
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values.append(child)
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if static_contents(parent.routine) == "proc" and len(parent.args) >= 3 and child is parent.args[2]:
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scope = child
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name = qualify(static_contents(parent.args[0]) or "", ROOT_NAMESPACE)
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namespace = name.rsplit("::", 1)[0] or ROOT_NAMESPACE
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if not commands or isinstance(values[-1], Script):
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return None
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literal = _literal_at(values[-1], point)
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if literal is None:
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return None
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variables, targets = _literal_targets(commands, values)
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if variables:
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scope_targets = solve_flow(fact for command in _scope_commands(scope) for fact in command_flow_facts(command))
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targets.extend(target for variable in variables for target in scope_targets.get(variable, ()))
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kinds = frozenset(kind for target in targets for kind in _target_kinds(target, table, namespace))
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return (kinds, *literal) if kinds else None
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@@ -5,6 +5,16 @@ from pathlib import Path
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import lsprotocol.types as lsp
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from tclint.syntax_tree import Command, List, Node, QuotedWord, Script, VarSub
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from tools.def_flow import ( # noqa: F401 (re-exported)
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DEF_ADDRESS,
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DEF_BLOCK_TEMPLATE,
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DEF_SYMBOL_KINDS,
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ProcDefFlows,
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command_flow_facts,
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def_argument_kinds,
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proc_def_flows,
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)
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from tools.def_flow import def_name as _def_name
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from tools.variable_names import array_key_parts, variable_name
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ROOT_NAMESPACE = "::"
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@@ -39,6 +49,8 @@ class FileSymbolIndex:
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uri: str
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occurrences: tuple[SymbolOccurrence, ...]
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document_range: lsp.Range | None = None
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# Procs whose parameters reach .def arguments: (qualified proc name, flows).
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def_flows: tuple[tuple[str, ProcDefFlows], ...] = ()
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@dataclass(frozen=True)
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@@ -114,49 +126,6 @@ def _name_range(node: Node, raw_name: str, *, variable_sub: bool = False) -> lsp
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)
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DEF_BLOCK_TEMPLATE = "block_template"
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DEF_ADDRESS = "address"
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DEF_SYMBOL_KINDS = frozenset({DEF_BLOCK_TEMPLATE, DEF_ADDRESS})
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# NX commands taking .def names: command -> (first argument index, last index or
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# None for all following arguments, kind).
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_DEF_ARGUMENTS: dict[str, tuple[tuple[int, int | None, str], ...]] = {
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"MOM_do_template": ((0, 0, DEF_BLOCK_TEMPLATE),),
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"MOM_add_to_block_buffer": ((0, 0, DEF_BLOCK_TEMPLATE),),
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"MOM_polar_motion": ((0, 0, DEF_BLOCK_TEMPLATE),),
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"MOM_force_block": ((1, None, DEF_BLOCK_TEMPLATE),),
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"MOM_ask_address_value": ((0, 0, DEF_ADDRESS),),
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"MOM_add_to_address_buffer": ((0, 0, DEF_ADDRESS),),
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"MOM_enable_address": ((0, None, DEF_ADDRESS),),
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"MOM_disable_address": ((0, None, DEF_ADDRESS),),
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"MOM_force": ((1, None, DEF_ADDRESS),),
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"MOM_suppress": ((1, None, DEF_ADDRESS),),
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"MOM_incremental": ((1, None, DEF_ADDRESS),),
|
||||
}
|
||||
_DEFINITION_ELEMENT_KINDS = {"ADDRESS": DEF_ADDRESS, "BLOCK": DEF_BLOCK_TEMPLATE}
|
||||
|
||||
|
||||
def def_argument_kinds(command: Command) -> list[tuple[Node, str]]:
|
||||
"""Return the arguments of ``command`` that name a .def block template or address."""
|
||||
routine = _static_contents(command.routine)
|
||||
if routine in {"MOM_ask_definition_element", "MOM_has_definition_element"}:
|
||||
kind = _DEFINITION_ELEMENT_KINDS.get((_static_contents(command.args[0]) or "").upper()) if command.args else None
|
||||
return [(command.args[1], kind)] if kind and len(command.args) >= 2 else []
|
||||
result = []
|
||||
for first, last, kind in _DEF_ARGUMENTS.get(routine or "", ()):
|
||||
for position, argument in enumerate(command.args):
|
||||
if position >= first and (last is None or position <= last):
|
||||
result.append((argument, kind))
|
||||
return result
|
||||
|
||||
|
||||
def _def_name(node: Node) -> str | None:
|
||||
name = _static_contents(node)
|
||||
if not name or node.contents_pos is None or any(char.isspace() or char in "$[]{}\\\"" for char in name):
|
||||
return None
|
||||
return name
|
||||
|
||||
|
||||
def _node_range(node: Node) -> lsp.Range | None:
|
||||
if node.pos is None or node.end_pos is None:
|
||||
return None
|
||||
@@ -311,6 +280,9 @@ def build_file_symbol_index(
|
||||
# Most occurrences repeat a few identities; sharing one object per identity
|
||||
# keeps the index (and its persistent cache) small.
|
||||
identities: dict[SymbolIdentity, SymbolIdentity] = {}
|
||||
def_flows: list[tuple[str, ProcDefFlows]] = []
|
||||
# Flow facts of the procs being walked, innermost last.
|
||||
flow_facts: list[list] = []
|
||||
|
||||
def shared(identity: SymbolIdentity | None) -> SymbolIdentity | None:
|
||||
return None if identity is None else identities.setdefault(identity, identity)
|
||||
@@ -427,11 +399,13 @@ def build_file_symbol_index(
|
||||
)
|
||||
|
||||
parameters = command.args[1]
|
||||
parameter_names = []
|
||||
for parameter in getattr(parameters, "children", []):
|
||||
parameter_node = parameter
|
||||
if isinstance(parameter, List) and parameter.children:
|
||||
parameter_node = parameter.children[0]
|
||||
parameter_name = _static_contents(parameter_node)
|
||||
parameter_names.append(parameter_name or "")
|
||||
if parameter_name:
|
||||
add_variable(
|
||||
parameter_node,
|
||||
@@ -440,7 +414,12 @@ def build_file_symbol_index(
|
||||
is_definition=True,
|
||||
)
|
||||
|
||||
flow_facts.append([])
|
||||
walk_script(body, proc_scope)
|
||||
facts = flow_facts.pop()
|
||||
flows = proc_def_flows(facts, parameter_names, proc_namespace) if facts else ()
|
||||
if flows:
|
||||
def_flows.append((proc_identity.name, flows))
|
||||
|
||||
def walk_namespace(command: Command, scope: _Scope) -> bool:
|
||||
if len(command.args) < 3 or _static_contents(command.args[0]) != "eval":
|
||||
@@ -478,6 +457,8 @@ def build_file_symbol_index(
|
||||
|
||||
if routine:
|
||||
add_proc(command.routine, routine, scope, is_definition=False)
|
||||
if flow_facts:
|
||||
flow_facts[-1].extend(command_flow_facts(command))
|
||||
|
||||
for node, kind in def_argument_kinds(command):
|
||||
name = _def_name(node)
|
||||
@@ -550,6 +531,7 @@ def build_file_symbol_index(
|
||||
uri=uri,
|
||||
occurrences=tuple(occurrences),
|
||||
document_range=_node_range(tree),
|
||||
def_flows=tuple(def_flows),
|
||||
)
|
||||
|
||||
|
||||
|
||||
Reference in New Issue
Block a user