mirror of
https://gitlab.gnome.org/jwestman/blueprint-compiler.git
synced 2025-05-03 15:49:07 -04:00
a12d3f5c81
A lookup tag with no type attribute would crash the decompiler, even if that was valid. This wasn't caught by the tests since blueprint never generates such XML. Also fixed a bug in the tests that caused decompiler-only tests not to run.
384 lines
11 KiB
Python
384 lines
11 KiB
Python
# expressions.py
|
|
#
|
|
# Copyright 2022 James Westman <james@jwestman.net>
|
|
#
|
|
# This file is free software; you can redistribute it and/or modify it
|
|
# under the terms of the GNU Lesser General Public License as
|
|
# published by the Free Software Foundation; either version 3 of the
|
|
# License, or (at your option) any later version.
|
|
#
|
|
# This file is distributed in the hope that it will be useful, but
|
|
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
# Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
# SPDX-License-Identifier: LGPL-3.0-or-later
|
|
|
|
|
|
from ..decompiler import decompile_element
|
|
from .common import *
|
|
from .contexts import ScopeCtx, ValueTypeCtx
|
|
from .types import TypeName
|
|
|
|
expr = Sequence()
|
|
|
|
|
|
class ExprBase(AstNode):
|
|
@context(ValueTypeCtx)
|
|
def value_type(self) -> ValueTypeCtx:
|
|
if rhs := self.rhs:
|
|
return rhs.context[ValueTypeCtx]
|
|
else:
|
|
return self.parent.context[ValueTypeCtx]
|
|
|
|
@property
|
|
def type(self) -> T.Optional[GirType]:
|
|
raise NotImplementedError()
|
|
|
|
@property
|
|
def rhs(self) -> T.Optional["ExprBase"]:
|
|
if isinstance(self.parent, Expression):
|
|
children = list(self.parent.children)
|
|
if children.index(self) + 1 < len(children):
|
|
return children[children.index(self) + 1]
|
|
else:
|
|
return self.parent.rhs
|
|
else:
|
|
return None
|
|
|
|
|
|
class Expression(ExprBase):
|
|
grammar = expr
|
|
|
|
@property
|
|
def last(self) -> ExprBase:
|
|
return self.children[-1]
|
|
|
|
@property
|
|
def type(self) -> T.Optional[GirType]:
|
|
return self.last.type
|
|
|
|
|
|
class InfixExpr(ExprBase):
|
|
@property
|
|
def lhs(self):
|
|
children = list(self.parent_by_type(Expression).children)
|
|
return children[children.index(self) - 1]
|
|
|
|
|
|
class LiteralExpr(ExprBase):
|
|
grammar = LITERAL
|
|
|
|
@property
|
|
def is_object(self) -> bool:
|
|
from .values import IdentLiteral
|
|
|
|
return isinstance(self.literal.value, IdentLiteral) and (
|
|
self.literal.value.ident in self.context[ScopeCtx].objects
|
|
or self.root.is_legacy_template(self.literal.value.ident)
|
|
)
|
|
|
|
@property
|
|
def is_this(self) -> bool:
|
|
from .values import IdentLiteral
|
|
|
|
return (
|
|
not self.is_object
|
|
and isinstance(self.literal.value, IdentLiteral)
|
|
and self.literal.value.ident == "item"
|
|
)
|
|
|
|
@property
|
|
def literal(self):
|
|
from .values import Literal
|
|
|
|
return self.children[Literal][0]
|
|
|
|
@property
|
|
def type(self) -> T.Optional[GirType]:
|
|
return self.literal.value.type
|
|
|
|
@validate()
|
|
def item_validations(self):
|
|
if self.is_this:
|
|
if not isinstance(self.rhs, CastExpr):
|
|
raise CompileError('"item" must be cast to its object type')
|
|
|
|
if not isinstance(self.rhs.rhs, LookupOp):
|
|
raise CompileError('"item" can only be used for looking up properties')
|
|
|
|
|
|
class LookupOp(InfixExpr):
|
|
grammar = [".", UseIdent("property")]
|
|
|
|
@context(ValueTypeCtx)
|
|
def value_type(self) -> ValueTypeCtx:
|
|
return ValueTypeCtx(None, must_infer_type=True)
|
|
|
|
@property
|
|
def property_name(self) -> str:
|
|
return self.tokens["property"]
|
|
|
|
@property
|
|
def type(self) -> T.Optional[GirType]:
|
|
if isinstance(self.lhs.type, gir.Class) or isinstance(
|
|
self.lhs.type, gir.Interface
|
|
):
|
|
if property := self.lhs.type.properties.get(self.property_name):
|
|
return property.type
|
|
|
|
return None
|
|
|
|
@docs("property")
|
|
def property_docs(self):
|
|
if not (
|
|
isinstance(self.lhs.type, gir.Class)
|
|
or isinstance(self.lhs.type, gir.Interface)
|
|
):
|
|
return None
|
|
|
|
if property := self.lhs.type.properties.get(self.property_name):
|
|
return property.doc
|
|
|
|
@validate("property")
|
|
def property_exists(self):
|
|
if self.lhs.type is None:
|
|
# Literal values throw their own errors if the type isn't known
|
|
if isinstance(self.lhs, LiteralExpr):
|
|
return
|
|
|
|
raise CompileError(
|
|
f"Could not determine the type of the preceding expression",
|
|
hints=[
|
|
f"add a type cast so blueprint knows which type the property {self.property_name} belongs to"
|
|
],
|
|
)
|
|
|
|
if self.lhs.type.incomplete:
|
|
return
|
|
|
|
elif not isinstance(self.lhs.type, gir.Class) and not isinstance(
|
|
self.lhs.type, gir.Interface
|
|
):
|
|
raise CompileError(
|
|
f"Type {self.lhs.type.full_name} does not have properties"
|
|
)
|
|
|
|
elif self.lhs.type.properties.get(self.property_name) is None:
|
|
raise CompileError(
|
|
f"{self.lhs.type.full_name} does not have a property called {self.property_name}",
|
|
did_you_mean=(self.property_name, self.lhs.type.properties.keys()),
|
|
)
|
|
|
|
@validate("property")
|
|
def property_deprecated(self):
|
|
if self.lhs.type is None or not (
|
|
isinstance(self.lhs.type, gir.Class)
|
|
or isinstance(self.lhs.type, gir.Interface)
|
|
):
|
|
return
|
|
|
|
if property := self.lhs.type.properties.get(self.property_name):
|
|
if property.deprecated:
|
|
hints = []
|
|
if property.deprecated_doc:
|
|
hints.append(property.deprecated_doc)
|
|
raise DeprecatedWarning(
|
|
f"{property.signature} is deprecated",
|
|
hints=hints,
|
|
)
|
|
|
|
|
|
class CastExpr(InfixExpr):
|
|
grammar = [
|
|
Keyword("as"),
|
|
AnyOf(
|
|
["<", TypeName, Match(">").expected()],
|
|
[
|
|
UseExact("lparen", "("),
|
|
TypeName,
|
|
UseExact("rparen", ")").expected("')'"),
|
|
],
|
|
),
|
|
]
|
|
|
|
@context(ValueTypeCtx)
|
|
def value_type(self):
|
|
return ValueTypeCtx(self.type)
|
|
|
|
@property
|
|
def type(self) -> T.Optional[GirType]:
|
|
return self.children[TypeName][0].gir_type
|
|
|
|
@validate()
|
|
def cast_makes_sense(self):
|
|
if self.type is None or self.lhs.type is None:
|
|
return
|
|
|
|
if not self.type.assignable_to(self.lhs.type):
|
|
raise CompileError(
|
|
f"Invalid cast. No instance of {self.lhs.type.full_name} can be an instance of {self.type.full_name}."
|
|
)
|
|
|
|
@validate("lparen", "rparen")
|
|
def upgrade_to_angle_brackets(self):
|
|
if self.tokens["lparen"]:
|
|
raise UpgradeWarning(
|
|
"Use angle bracket syntax introduced in blueprint 0.8.0",
|
|
actions=[
|
|
CodeAction(
|
|
"Use <> instead of ()",
|
|
f"<{self.children[TypeName][0].as_string}>",
|
|
)
|
|
],
|
|
)
|
|
|
|
@docs("as")
|
|
def ref_docs(self):
|
|
return get_docs_section("Syntax CastExpression")
|
|
|
|
|
|
class ClosureArg(AstNode):
|
|
grammar = Expression
|
|
|
|
@property
|
|
def expr(self) -> Expression:
|
|
return self.children[Expression][0]
|
|
|
|
@context(ValueTypeCtx)
|
|
def value_type(self) -> ValueTypeCtx:
|
|
return ValueTypeCtx(None)
|
|
|
|
|
|
class ClosureExpr(ExprBase):
|
|
grammar = [
|
|
Optional(["$", UseLiteral("extern", True)]),
|
|
UseIdent("name"),
|
|
"(",
|
|
Delimited(ClosureArg, ","),
|
|
")",
|
|
]
|
|
|
|
@property
|
|
def type(self) -> T.Optional[GirType]:
|
|
if isinstance(self.rhs, CastExpr):
|
|
return self.rhs.type
|
|
else:
|
|
return None
|
|
|
|
@property
|
|
def closure_name(self) -> str:
|
|
return self.tokens["name"]
|
|
|
|
@property
|
|
def args(self) -> T.List[ClosureArg]:
|
|
return self.children[ClosureArg]
|
|
|
|
@validate()
|
|
def cast_to_return_type(self):
|
|
if not isinstance(self.rhs, CastExpr):
|
|
raise CompileError(
|
|
"Closure expression must be cast to the closure's return type"
|
|
)
|
|
|
|
@validate()
|
|
def builtin_exists(self):
|
|
if not self.tokens["extern"]:
|
|
raise CompileError(f"{self.closure_name} is not a builtin function")
|
|
|
|
@docs("name")
|
|
def ref_docs(self):
|
|
return get_docs_section("Syntax ClosureExpression")
|
|
|
|
|
|
expr.children = [
|
|
AnyOf(ClosureExpr, LiteralExpr, ["(", Expression, ")"]),
|
|
ZeroOrMore(AnyOf(LookupOp, CastExpr)),
|
|
]
|
|
|
|
|
|
@decompiler("lookup", skip_children=True, cdata=True)
|
|
def decompile_lookup(
|
|
ctx: DecompileCtx,
|
|
gir: gir.GirContext,
|
|
cdata: str,
|
|
name: str,
|
|
type: T.Optional[str] = None,
|
|
):
|
|
if ctx.parent_node is not None and ctx.parent_node.tag == "property":
|
|
ctx.print("expr ")
|
|
|
|
if type is None:
|
|
type = ""
|
|
elif t := ctx.type_by_cname(type):
|
|
type = decompile.full_name(t)
|
|
else:
|
|
type = "$" + type
|
|
|
|
assert ctx.current_node is not None
|
|
|
|
constant = None
|
|
if len(ctx.current_node.children) == 0:
|
|
constant = cdata
|
|
elif (
|
|
len(ctx.current_node.children) == 1
|
|
and ctx.current_node.children[0].tag == "constant"
|
|
):
|
|
constant = ctx.current_node.children[0].cdata
|
|
|
|
if constant is not None:
|
|
if constant == ctx.template_class:
|
|
ctx.print("template." + name)
|
|
elif constant == "":
|
|
ctx.print(f"item as <{type}>.{name}")
|
|
else:
|
|
ctx.print(constant + "." + name)
|
|
return
|
|
else:
|
|
for child in ctx.current_node.children:
|
|
decompile.decompile_element(ctx, gir, child)
|
|
|
|
ctx.print(f" as <{type}>.{name}")
|
|
|
|
|
|
@decompiler("constant", cdata=True)
|
|
def decompile_constant(
|
|
ctx: DecompileCtx, gir: gir.GirContext, cdata: str, type: T.Optional[str] = None
|
|
):
|
|
if ctx.parent_node is not None and ctx.parent_node.tag == "property":
|
|
ctx.print("expr ")
|
|
|
|
if type is None:
|
|
if cdata == ctx.template_class:
|
|
ctx.print("template")
|
|
else:
|
|
ctx.print(cdata)
|
|
else:
|
|
_, string = ctx.decompile_value(cdata, ctx.type_by_cname(type))
|
|
ctx.print(string)
|
|
|
|
|
|
@decompiler("closure", skip_children=True)
|
|
def decompile_closure(ctx: DecompileCtx, gir: gir.GirContext, function: str, type: str):
|
|
if ctx.parent_node is not None and ctx.parent_node.tag == "property":
|
|
ctx.print("expr ")
|
|
|
|
if t := ctx.type_by_cname(type):
|
|
type = decompile.full_name(t)
|
|
else:
|
|
type = "$" + type
|
|
|
|
ctx.print(f"${function}(")
|
|
|
|
assert ctx.current_node is not None
|
|
for i, node in enumerate(ctx.current_node.children):
|
|
decompile_element(ctx, gir, node)
|
|
|
|
assert ctx.current_node is not None
|
|
if i < len(ctx.current_node.children) - 1:
|
|
ctx.print(", ")
|
|
|
|
ctx.end_block_with(f") as <{type}>")
|