55 lines
1.1 KiB
Go
55 lines
1.1 KiB
Go
package ast
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import "git.red-panda.pet/pandaware/lox-go/lexer"
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// todo: find something better than any here
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// we can't use generics on either the visitor itself or
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// each individual method because the adding it to the
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// visitor itself infects every expr you use with it
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// and methods cannot have generic parameters
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type ExprVisitor interface {
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VisitBinaryExpr(b *BinaryExpr) any
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VisitGroupingExpr(g *GroupingExpr) any
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VisitLiteralExpr(g *LiteralExpr) any
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VisitUnaryExpr(g *UnaryExpr) any
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}
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type Expr interface {
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accept(v ExprVisitor) any
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}
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type BinaryExpr struct {
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Left Expr
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Operator *lexer.Token
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Right Expr
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}
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func (b *BinaryExpr) accept(v ExprVisitor) any {
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return v.VisitBinaryExpr(b)
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}
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type GroupingExpr struct {
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Expr Expr
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}
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func (g *GroupingExpr) accept(v ExprVisitor) any {
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return v.VisitGroupingExpr(g)
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}
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type LiteralExpr struct {
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Value any
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}
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func (l *LiteralExpr) accept(v ExprVisitor) any {
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return v.VisitLiteralExpr(l)
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}
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type UnaryExpr struct {
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Operator *lexer.Token
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Right Expr
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}
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func (u *UnaryExpr) accept(v ExprVisitor) any {
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return v.VisitUnaryExpr(u)
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}
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