Split up the ast.go into smaller files
This commit is contained in:
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f2241cc31f
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2f6f79fe35
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@ -20,11 +20,6 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
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// Serene's AST.
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package ast
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import (
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"sort"
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"strings"
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)
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type NodeType int
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const (
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@ -45,162 +40,6 @@ const (
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)
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type Source struct {
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Buffer *[]string
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// The namespace name which this source is describing
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NS string
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LineIndex *[]int
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}
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func (s *Source) GetPos(start, end int) *string {
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if start < len(*s.Buffer) && start >= 0 && end < len(*s.Buffer) && end > 0 && start <= end {
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result := strings.Join((*s.Buffer)[start:end], "")
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return &result
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} else {
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return nil
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}
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}
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func (s *Source) GetLine(linenum int) string {
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lines := strings.Split(strings.Join(*s.Buffer, ""), "\n")
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if linenum > 0 && linenum <= len(lines) {
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return lines[linenum-1]
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}
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return "----"
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}
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func (s *Source) LineNumberFor(pos int) int {
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// Some dirty print debugger code
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// for i, r := range *s.LineIndex {
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// empty := ""
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// var line *string
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// var num int
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// if i == 0 {
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// line = s.GetPos(0, r)
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// num = 0
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// } else {
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// line = s.GetPos((*s.LineIndex)[i-1], r)
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// num = (*s.LineIndex)[i-1]
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// }
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// if line == nil {
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// line = &empty
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// }
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// fmt.Print(">>>> ", num, r, *line)
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// }
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if pos < 0 {
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return -1
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}
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result := sort.SearchInts(*s.LineIndex, pos)
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// We've found something
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if result > -1 {
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// Since line numbers start from 1 unlike arrays :))
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result += 1
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}
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return result
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}
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var builtinSource *Source
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func GetBuiltinSource() *Source {
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if builtinSource == nil {
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buf := strings.Split("builtin", "")
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lineindex := []int{len(buf) - 1}
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builtinSource = &Source{
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Buffer: &buf,
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NS: "Serene.builtins",
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LineIndex: &lineindex,
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}
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}
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return builtinSource
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}
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type Location struct {
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start int
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end int
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source Source
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knownLocation bool
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}
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var UnknownLocation *Location = &Location{knownLocation: false}
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func (l *Location) GetStart() int {
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return l.start
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}
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func (l *Location) GetEnd() int {
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return l.end
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}
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func (l *Location) GetSource() *Source {
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if l.IsKnownLocaiton() {
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return &l.source
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}
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return GetBuiltinSource()
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}
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func (l *Location) IncStart(x int) {
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if x+l.start < len(*l.source.Buffer) {
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l.start += x
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} else {
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l.start = len(*l.source.Buffer) - 1
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}
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}
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func (l *Location) DecStart(x int) {
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if l.start-x >= 0 {
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l.start -= x
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} else {
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l.start = 0
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}
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}
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func (l *Location) IncEnd(x int) {
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if x+l.end < len(*l.source.Buffer) {
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l.end += x
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} else {
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l.end = len(*l.source.Buffer) - 1
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}
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}
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func (l *Location) DecEnd(x int) {
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if l.end-x >= 0 {
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l.end -= x
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} else {
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l.end = 0
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}
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}
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func (l *Location) IsKnownLocaiton() bool {
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return l.knownLocation
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}
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type ILocatable interface {
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GetLocation() *Location
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}
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func MakeLocation(input *Source, start int, end int) *Location {
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return &Location{
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source: *input,
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start: start,
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end: end,
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knownLocation: true,
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}
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}
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type ITypable interface {
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GetType() NodeType
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}
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func MakeUnknownLocation() *Location {
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return UnknownLocation
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}
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@ -0,0 +1,98 @@
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/*
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Serene --- Yet an other Lisp
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Copyright (c) 2020 Sameer Rahmani <lxsameer@gnu.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package ast
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type Location struct {
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start int
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end int
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source Source
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knownLocation bool
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}
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var UnknownLocation *Location = &Location{knownLocation: false}
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func (l *Location) GetStart() int {
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return l.start
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}
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func (l *Location) GetEnd() int {
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return l.end
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}
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func (l *Location) GetSource() *Source {
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if l.IsKnownLocaiton() {
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return &l.source
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}
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return GetBuiltinSource()
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}
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func (l *Location) IncStart(x int) {
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if x+l.start < len(*l.source.Buffer) {
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l.start += x
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} else {
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l.start = len(*l.source.Buffer) - 1
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}
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}
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func (l *Location) DecStart(x int) {
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if l.start-x >= 0 {
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l.start -= x
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} else {
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l.start = 0
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}
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}
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func (l *Location) IncEnd(x int) {
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if x+l.end < len(*l.source.Buffer) {
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l.end += x
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} else {
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l.end = len(*l.source.Buffer) - 1
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}
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}
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func (l *Location) DecEnd(x int) {
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if l.end-x >= 0 {
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l.end -= x
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} else {
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l.end = 0
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}
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}
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func (l *Location) IsKnownLocaiton() bool {
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return l.knownLocation
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}
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type ILocatable interface {
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GetLocation() *Location
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}
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func MakeLocation(input *Source, start int, end int) *Location {
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return &Location{
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source: *input,
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start: start,
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end: end,
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knownLocation: true,
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}
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}
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func MakeUnknownLocation() *Location {
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return UnknownLocation
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}
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@ -0,0 +1,118 @@
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/*
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Serene --- Yet an other Lisp
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Copyright (c) 2020 Sameer Rahmani <lxsameer@gnu.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package ast
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// The Source data structure is used to track expression back to the source
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// code. For example to find which source (file) they belongs to.
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import (
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"sort"
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"strings"
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)
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var builtinSource *Source
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type Source struct {
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// A Pointer to the buffer where the parser used for parsing the source
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Buffer *[]string
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// The namespace name which this source is describing
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NS string
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// This array contains the boundaries of each line in the buffer. For example
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// [24 50 106] means that the buffer contains 3 lines and the first line can
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// be found from the index 0 to index 24 of the buffer and the second line is
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// from index 25 till 50 and so on
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LineIndex *[]int
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}
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// GetSubstr returns the a pointer to the string from the buffer specified by the `start` and `end`
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func (s *Source) GetSubstr(start, end int) *string {
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if start < len(*s.Buffer) && start >= 0 && end < len(*s.Buffer) && end > 0 && start <= end {
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result := strings.Join((*s.Buffer)[start:end], "")
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return &result
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} else {
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return nil
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}
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}
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// GetLine returns the line specified by the `linenum` from the buffer. It will return "----" if the
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// given line number exceeds the boundaries of the buffer
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func (s *Source) GetLine(linenum int) string {
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lines := strings.Split(strings.Join(*s.Buffer, ""), "\n")
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if linenum > 0 && linenum <= len(lines) {
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return lines[linenum-1]
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}
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return "----"
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}
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// LineNumberFor returns the line number associated with the given position `pos` in
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// the buffer
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func (s *Source) LineNumberFor(pos int) int {
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// Some dirty print debugger code
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// for i, r := range *s.LineIndex {
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// empty := ""
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// var line *string
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// var num int
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// if i == 0 {
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// line = s.GetSubstr(0, r)
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// num = 0
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// } else {
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// line = s.GetSubstr((*s.LineIndex)[i-1], r)
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// num = (*s.LineIndex)[i-1]
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// }
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// if line == nil {
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// line = &empty
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// }
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// fmt.Print(">>>> ", num, r, *line)
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// }
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if pos < 0 {
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return -1
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}
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result := sort.SearchInts(*s.LineIndex, pos)
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// We've found something
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if result > -1 {
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// Since line numbers start from 1 unlike arrays :))
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result += 1
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}
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return result
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}
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// GetBuiltinSource returns a pointer to a source that represents builtin
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// expressions
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func GetBuiltinSource() *Source {
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if builtinSource == nil {
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buf := strings.Split("builtin", "")
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lineindex := []int{len(buf) - 1}
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builtinSource = &Source{
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Buffer: &buf,
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NS: "Serene.builtins",
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LineIndex: &lineindex,
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}
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}
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return builtinSource
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}
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