salix/ast/ast.go

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/*
* Salix - Go templating engine
* Copyright (C) 2023 Elara Musayelyan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
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package ast
import "fmt"
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func PosError(n Node, format string, v ...any) error {
return fmt.Errorf(n.Pos().String()+": "+format, v...)
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}
type Node interface {
Pos() Position
}
type Position struct {
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Name string
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Line int
Col int
}
func (p Position) String() string {
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return fmt.Sprintf("%s: line %d, col %d", p.Name, p.Line, p.Col)
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}
type Tag struct {
Name Ident
Params []Node
HasBody bool
Position Position
}
func (t Tag) Pos() Position {
return t.Position
}
type ExprTag struct {
Value Node
Position Position
}
func (et ExprTag) Pos() Position {
return et.Position
}
type EndTag struct {
Name Ident
Position Position
}
func (et EndTag) Pos() Position {
return et.Position
}
type Text struct {
Data []byte
Position Position
}
func (t Text) Pos() Position {
return t.Position
}
type Value struct {
Node
Not bool
}
type Expr struct {
First Node
Operator Operator
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Rest []Expr
Position Position
}
func (e Expr) Pos() Position {
return e.Position
}
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type Assignment struct {
Name Ident
Value Node
Position Position
}
func (a Assignment) Pos() Position {
return a.Position
}
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type FuncCall struct {
Name Ident
Params []Node
Position Position
}
func (fc FuncCall) Pos() Position {
return fc.Position
}
type MethodCall struct {
Value Node
Name Ident
Params []Node
Position Position
}
func (mc MethodCall) Pos() Position {
return mc.Position
}
type FieldAccess struct {
Value Node
Name Ident
Position Position
}
func (fa FieldAccess) Pos() Position {
return fa.Position
}
type Index struct {
Value Node
Index Node
Position Position
}
func (i Index) Pos() Position {
return i.Position
}
type Ident struct {
Value string
Position Position
}
func (id Ident) Pos() Position {
return id.Position
}
type String struct {
Value string
Position Position
}
func (s String) Pos() Position {
return s.Position
}
type Float struct {
Value float64
Position Position
}
func (f Float) Pos() Position {
return f.Position
}
type Integer struct {
Value int64
Position Position
}
func (i Integer) Pos() Position {
return i.Position
}
type Bool struct {
Value bool
Position Position
}
func (b Bool) Pos() Position {
return b.Position
}
type Operator struct {
Value string
Position Position
}
func (op Operator) Pos() Position {
return op.Position
}
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type Ternary struct {
Condition Node
IfTrue Node
Else Node
Position Position
}
func (t Ternary) Pos() Position {
return t.Position
}
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type VariableOr struct {
Variable Ident
Or Node
Position Position
}
func (vo VariableOr) Pos() Position {
return vo.Position
}