mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-05-16 11:32:39 +00:00
717 lines
16 KiB
Go
717 lines
16 KiB
Go
// Copyright 2022 The Gc Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package gc // modernc.org/gc/v3
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import (
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"go/constant"
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"math"
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)
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var (
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_ Expression = (*BasicLitNode)(nil)
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_ Expression = (*BinaryExpressionNode)(nil)
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_ Expression = (*CompositeLitNode)(nil)
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_ Expression = (*ConversionNode)(nil)
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_ Expression = (*FunctionLitNode)(nil)
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_ Expression = (*KeyedElementNode)(nil)
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_ Expression = (*LiteralValueNode)(nil)
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_ Expression = (*MethodExprNode)(nil)
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_ Expression = (*OperandNameNode)(nil)
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_ Expression = (*OperandNode)(nil)
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_ Expression = (*OperandQualifiedNameNode)(nil)
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_ Expression = (*ParenthesizedExpressionNode)(nil)
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_ Expression = (*PrimaryExprNode)(nil)
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_ Expression = (*UnaryExprNode)(nil)
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_ Expression = (*ValueExpression)(nil)
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falseVal = constant.MakeBool(false)
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trueVal = constant.MakeBool(true)
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unknown = constant.MakeUnknown()
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)
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func known(v constant.Value) bool { return v != nil && v.Kind() != constant.Unknown }
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type valueCache struct {
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v constant.Value
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}
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func (n *valueCache) Value() constant.Value {
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if n.v != nil {
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return n.v
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}
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return unknown
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}
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func (n *valueCache) setValue(v constant.Value) constant.Value {
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n.v = v
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return v
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}
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type valuer interface {
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Value() constant.Value
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}
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type Expression interface {
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Node
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checkExpr(c *ctx) Expression
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clone() Expression
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typer
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valuer
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}
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type ValueExpression struct {
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Node
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typeCache
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valueCache
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}
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func (n *ValueExpression) checkExpr(c *ctx) Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *ValueExpression) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *BasicLitNode) Type() Type {
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switch n.Ch() {
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case CHAR:
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return n.ctx.int32
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case INT:
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return n.ctx.untypedInt
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case FLOAT:
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return n.ctx.untypedFloat
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case STRING:
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return n.ctx.untypedString
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default:
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panic(todo("%v: %T %s %v", n.Position(), n, n.Source(false), n.Ch()))
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}
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}
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func (n *BasicLitNode) Value() constant.Value {
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return constant.MakeFromLiteral(n.Src(), n.Ch(), 0)
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}
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func (n *BasicLitNode) checkExpr(c *ctx) Expression {
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n.ctx = c
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if !known(n.Value()) {
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c.err(n, "invalid literal: %s", n.Source(false))
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}
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return n
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}
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func (n *BasicLitNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandNameNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandNameNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandNameNode) checkExpr(c *ctx) Expression {
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in, named := n.LexicalScope().lookup(n.Name)
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switch x := named.n.(type) {
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case *ConstSpecNode:
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switch in.kind {
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case UniverseScope:
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switch n.Name.Src() {
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case "iota":
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if c.iota < 0 {
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panic(todo("%v: %T %s", n.Position(), x, n.Source(false)))
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}
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r := &ValueExpression{Node: x}
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r.t = c.untypedInt
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r.v = constant.MakeInt64(c.iota)
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return r
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default:
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panic(todo("%v: %T %s", n.Position(), x, n.Source(false)))
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}
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default:
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return x.Expression
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}
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default:
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panic(todo("%v: %T %s", n.Position(), x, n.Source(false)))
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}
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}
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func (n *OperandNameNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *ParenthesizedExpressionNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *ParenthesizedExpressionNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *ParenthesizedExpressionNode) checkExpr(c *ctx) Expression {
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return n.Expression.checkExpr(c)
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}
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func (n *ParenthesizedExpressionNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *LiteralValueNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *LiteralValueNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *LiteralValueNode) checkExpr(c *ctx) Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *LiteralValueNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *KeyedElementNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *KeyedElementNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *KeyedElementNode) checkExpr(c *ctx) Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *KeyedElementNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *CompositeLitNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *CompositeLitNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *CompositeLitNode) checkExpr(c *ctx) Expression {
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if n == nil {
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return nil
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}
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if !n.enter(c, n) {
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return n
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}
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t := n.setType(c.checkType(n.LiteralType))
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n.LiteralValue.check(c, t)
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return n
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}
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func (n *CompositeLitNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *LiteralValueNode) check(c *ctx, t Type) {
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if n == nil {
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return
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}
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switch t.Kind() {
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case Array:
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n.checkArray(c, t.(*ArrayTypeNode))
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default:
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panic(todo("%v: %T %s %v", n.Position(), n, n.Source(false), t.Kind()))
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}
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}
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func (n *LiteralValueNode) checkArray(c *ctx, t *ArrayTypeNode) {
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panic(todo("%v: %T %s %s", n.Position(), n, t, n.Source(false)))
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}
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func (n *FunctionLitNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *FunctionLitNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *FunctionLitNode) checkExpr(c *ctx) Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *FunctionLitNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandNode) checkExpr(c *ctx) Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandQualifiedNameNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandQualifiedNameNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandQualifiedNameNode) checkExpr(c *ctx) Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *OperandQualifiedNameNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *ConversionNode) Type() Type {
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return n.TypeNode
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}
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func (n *ConversionNode) checkExpr(c *ctx) Expression {
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t := n.TypeNode.check(c)
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n.Expression = n.Expression.checkExpr(c)
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v := n.Expression.Value()
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n.v = c.convertValue(n.Expression, v, t)
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return n
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}
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func (n *ConversionNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *MethodExprNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *MethodExprNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *MethodExprNode) checkExpr(c *ctx) Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *MethodExprNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *PrimaryExprNode) Type() Type {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *PrimaryExprNode) Value() constant.Value {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *PrimaryExprNode) checkExpr(c *ctx) Expression {
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switch x := n.PrimaryExpr.(type) {
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case *OperandNameNode:
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_, named := x.LexicalScope().lookup(x.Name)
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switch y := named.n.(type) {
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case *TypeDefNode:
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switch z := n.Postfix.(type) {
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case *ArgumentsNode:
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cnv := &ConversionNode{
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TypeNode: &TypeNameNode{
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Name: x.Name,
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lexicalScoper: x.lexicalScoper,
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},
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LPAREN: z.LPAREN,
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Expression: z.Expression,
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RPAREN: z.RPAREN,
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}
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return cnv.checkExpr(c)
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default:
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panic(todo("%v: %T %s", n.Position(), z, n.Source(false)))
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}
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default:
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panic(todo("%v: %T %s", n.Position(), y, n.Source(false)))
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}
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default:
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panic(todo("%v: %T %s", n.Position(), x, n.Source(false)))
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}
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n.PrimaryExpr = n.PrimaryExpr.checkExpr(c)
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switch x := n.Postfix.(type) {
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default:
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panic(todo("%v: %T %s", n.Position(), x, n.Source(false)))
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}
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}
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func (n *PrimaryExprNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *BinaryExpressionNode) checkExpr(c *ctx) (r Expression) {
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if n == nil {
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return nil
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}
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if n.typeCache.Type() != Invalid {
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return n
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}
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n.LHS = n.LHS.checkExpr(c)
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n.RHS = n.RHS.checkExpr(c)
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lv := n.LHS.Value()
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lt := n.LHS.Type()
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rv := n.RHS.Value()
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rt := n.RHS.Type()
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defer func() {
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if known(lv) && known(rv) && r != nil && !known(r.Value()) {
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c.err(n.Op, "operation value not determined: %v %s %v", lv, n.Op.Src(), rv)
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}
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}()
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switch n.Op.Ch() {
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case SHL, SHR:
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var u uint64
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var uOk bool
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n.t = lt
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// The right operand in a shift expression must have integer type or be an
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// untyped constant representable by a value of type uint.
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switch {
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case isIntegerType(rt):
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// ok
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case known(rv):
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if isAnyArithmeticType(rt) {
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rv = c.convertValue(n.RHS, rv, c.cfg.uint)
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if known(rv) {
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u, uOk = constant.Uint64Val(rv)
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}
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break
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}
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c.err(n.Op, "TODO %v", n.Op.Src())
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return n
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default:
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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return n
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}
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// If the left operand of a non-constant shift expression is an untyped
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// constant, it is first implicitly converted to the type it would assume if
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// the shift expression were replaced by its left operand alone.
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switch {
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case known(lv) && !known(rv):
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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// c.err(n.Op, "TODO %v", n.Op.Ch.str())
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// return n
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case known(lv) && known(rv):
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if !uOk {
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panic(todo(""))
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}
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n.t = lt
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n.v = constant.Shift(lv, n.Op.Ch(), uint(u))
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default:
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trc("", known(lv), known(rv), u, uOk)
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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// n.t = lt
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// n.v = constant.BinaryOp(lv, n.Op.Ch(), rv)
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}
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case ADD, SUB, MUL, QUO, REM:
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if !isAnyArithmeticType(lt) || !isAnyArithmeticType(rt) {
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c.err(n.Op, "TODO %v %v", lt, rt)
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break
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}
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// For other binary operators, the operand types must be identical unless the
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// operation involves shifts or untyped constants.
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//
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// Except for shift operations, if one operand is an untyped constant and the
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// other operand is not, the constant is implicitly converted to the type of
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// the other operand.
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switch {
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case isAnyUntypedType(lt) && isAnyUntypedType(rt):
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n.v = constant.BinaryOp(lv, n.Op.Ch(), rv)
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switch n.v.Kind() {
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case constant.Int:
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n.t = c.untypedInt
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case constant.Float:
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n.t = c.untypedFloat
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default:
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c.err(n.Op, "TODO %v %v %q %v %v -> %v %v", lv, lt, n.Op.Src(), rv, rt, n.v, n.v.Kind())
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}
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case isAnyUntypedType(lt) && !isAnyUntypedType(rt):
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c.err(n.Op, "TODO %v %v %q %v %v", lv, lt, n.Op.Src(), rv, rt)
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case !isAnyUntypedType(lt) && isAnyUntypedType(rt):
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c.err(n.Op, "TODO %v %v %q %v %v", lv, lt, n.Op.Src(), rv, rt)
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default: // case !isAnyUntypedType(lt) && !isAnyUntypedType(rt):
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c.err(n.Op, "TODO %v %v %q %v %v", lv, lt, n.Op.Src(), rv, rt)
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}
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default:
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c.err(n.Op, "TODO %v %v %q %v %v", lv, lt, n.Op.Src(), rv, rt)
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}
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return n
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}
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func (n *BinaryExpressionNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (n *UnaryExprNode) checkExpr(c *ctx) Expression {
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if n == nil {
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return nil
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}
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if n.typeCache.Type() != Invalid {
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return n
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}
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n.UnaryExpr = n.UnaryExpr.checkExpr(c)
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v := n.UnaryExpr.Value()
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t := n.UnaryExpr.Type()
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switch n.Op.Ch() {
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default:
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trc("", v, t)
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panic(todo("%v: %T %s", n.Op.Position(), n, n.Source(false)))
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}
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}
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func (n *UnaryExprNode) clone() Expression {
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panic(todo("%v: %T %s", n.Position(), n, n.Source(false)))
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}
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func (c *ctx) convertValue(n Node, v constant.Value, to Type) (r constant.Value) {
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if !known(v) {
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return unknown
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}
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switch to.Kind() {
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case
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Complex128,
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Complex64,
|
|
Function,
|
|
Interface,
|
|
Map,
|
|
Pointer,
|
|
Slice,
|
|
String,
|
|
Struct,
|
|
Tuple,
|
|
UnsafePointer,
|
|
UntypedBool,
|
|
UntypedComplex,
|
|
UntypedFloat,
|
|
UntypedInt,
|
|
UntypedNil,
|
|
UntypedRune,
|
|
UntypedString:
|
|
|
|
c.err(n, "TODO %v -> %v", v, to)
|
|
case Int:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
i64, ok := constant.Int64Val(w)
|
|
if !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
switch c.cfg.goarch {
|
|
case "386", "arm":
|
|
if i64 < math.MinInt32 || i64 > math.MaxInt32 {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
}
|
|
return w
|
|
case Int8:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
i64, ok := constant.Int64Val(w)
|
|
if !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
if i64 < math.MinInt8 || i64 > math.MaxInt8 {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
return w
|
|
case Int16:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
i64, ok := constant.Int64Val(w)
|
|
if !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
if i64 < math.MinInt16 || i64 > math.MaxInt16 {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
return w
|
|
case Int32:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
i64, ok := constant.Int64Val(w)
|
|
if !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
if i64 < math.MinInt32 || i64 > math.MaxInt32 {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
return w
|
|
case Int64:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
if _, ok := constant.Int64Val(w); !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
return w
|
|
case Uint, Uintptr:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
u64, ok := constant.Uint64Val(w)
|
|
if !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
switch c.cfg.goarch {
|
|
case "386", "arm":
|
|
if u64 > math.MaxUint32 {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
}
|
|
return w
|
|
case Uint8:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
u64, ok := constant.Uint64Val(w)
|
|
if !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
if u64 > math.MaxUint8 {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
return w
|
|
case Uint16:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
u64, ok := constant.Uint64Val(w)
|
|
if !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
if u64 > math.MaxUint16 {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
return w
|
|
case Uint32:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
u64, ok := constant.Uint64Val(w)
|
|
if !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
if u64 > math.MaxUint32 {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
return w
|
|
case Uint64:
|
|
w := constant.ToInt(v)
|
|
if !known(w) {
|
|
c.err(n, "cannot convert %s to %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
if _, ok := constant.Uint64Val(w); !ok {
|
|
c.err(n, "value %s overflows %s", v, to)
|
|
return unknown
|
|
}
|
|
|
|
return w
|
|
case Float32, Float64:
|
|
return constant.ToFloat(v)
|
|
case Bool:
|
|
if v.Kind() == constant.Bool {
|
|
return v
|
|
}
|
|
}
|
|
return unknown
|
|
}
|