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Merge pull request 'data-section' (#3) from data-section into main

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Reviewed-on: #3
This commit is contained in:
Sasha Koshka 2022-08-17 18:21:19 +00:00
commit e069569c3c
17 changed files with 994 additions and 62 deletions
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2
README.md
View File

@ -29,6 +29,8 @@ These are some design goals that I have followed/am following:
- Language syntax must have zero ambiguity
- The compiler should not generate new functions or complex logic that the user
has not written
- One line at a time - the language's syntax should encourage writing code that
flows vertically and not horizontally, with minimal nesting
## Planned features

26
file/error.go
View File

@ -52,20 +52,30 @@ func (err Error) Error () (formattedMessage string) {
if err.width > 0 {
// print erroneous line
line := err.Location.file.lines[err.Location.row]
formattedMessage +=
err.Location.file.lines[err.Location.row] + "\n"
// position error marker
var index int
for index = 0; index < err.Location.column; index ++ {
if line[index] == '\t' {
formattedMessage += "\t"
} else {
formattedMessage += " "
}
}
// print an arrow with a tail spanning the width of the mistake
columnCountdown := err.Location.column
for columnCountdown > 1 {
// TODO: for tabs, print out a teb instead.
formattedMessage += " "
columnCountdown --
}
for err.width > 1 {
// TODO: for tabs, print out 8 of these instead.
formattedMessage += "-"
if line[index] == '\t' {
formattedMessage += "--------"
} else {
formattedMessage += "-"
}
index ++
}
formattedMessage += "^\n"
}
formattedMessage += err.message + "\n"

30
lexer/lexer.go
View File

@ -176,7 +176,17 @@ func (lexer *LexingOperation) tokenizeSymbolBeginning () (err error) {
err = lexer.nextRune()
case '.':
token := lexer.newToken()
err = lexer.nextRune()
if err != nil { return }
token.kind = TokenKindDot
if lexer.char == '.' {
token.kind = TokenKindElipsis
err = lexer.nextRune()
}
lexer.addToken(token)
case ',':
token := lexer.newToken()
token.kind = TokenKindComma
lexer.addToken(token)
err = lexer.nextRune()
case '[':
@ -200,15 +210,15 @@ func (lexer *LexingOperation) tokenizeSymbolBeginning () (err error) {
lexer.addToken(token)
err = lexer.nextRune()
case '+':
token := lexer.newToken()
err = lexer.nextRune()
if err != nil { return }
token := lexer.newToken()
token.kind = TokenKindPlus
if lexer.char == '+' {
token.kind = TokenKindIncrement
err = lexer.nextRune()
}
lexer.addToken(token)
err = lexer.nextRune()
case '-':
err = lexer.tokenizeDashBeginning()
case '*':
@ -242,45 +252,45 @@ func (lexer *LexingOperation) tokenizeSymbolBeginning () (err error) {
lexer.addToken(token)
err = lexer.nextRune()
case '<':
token := lexer.newToken()
err = lexer.nextRune()
if err != nil { return }
token := lexer.newToken()
token.kind = TokenKindLessThan
if lexer.char == '<' {
token.kind = TokenKindLShift
err = lexer.nextRune()
}
lexer.addToken(token)
err = lexer.nextRune()
case '>':
token := lexer.newToken()
err = lexer.nextRune()
if err != nil { return }
token := lexer.newToken()
token.kind = TokenKindGreaterThan
if lexer.char == '>' {
token.kind = TokenKindRShift
err = lexer.nextRune()
}
lexer.addToken(token)
err = lexer.nextRune()
case '|':
token := lexer.newToken()
err = lexer.nextRune()
if err != nil { return }
token := lexer.newToken()
token.kind = TokenKindBinaryOr
if lexer.char == '|' {
token.kind = TokenKindLogicalOr
err = lexer.nextRune()
}
lexer.addToken(token)
err = lexer.nextRune()
case '&':
token := lexer.newToken()
err = lexer.nextRune()
if err != nil { return }
token := lexer.newToken()
token.kind = TokenKindBinaryAnd
if lexer.char == '&' {
token.kind = TokenKindLogicalAnd
err = lexer.nextRune()
}
lexer.addToken(token)
err = lexer.nextRune()
default:
err = file.NewError (
lexer.file.Location(1),

6
lexer/lexer_test.go
View File

@ -62,6 +62,8 @@ func TestTokenizeAll (test *testing.T) {
Token { kind: TokenKindName, value: "helloWorld" },
Token { kind: TokenKindColon },
Token { kind: TokenKindDot },
Token { kind: TokenKindComma },
Token { kind: TokenKindElipsis },
Token { kind: TokenKindLBracket },
Token { kind: TokenKindRBracket },
Token { kind: TokenKindLBrace },
@ -91,6 +93,10 @@ func TestTokenizeAll (test *testing.T) {
func TestTokenizeNumbers (test *testing.T) {
checkTokenSlice("../tests/lexer/numbers.arf", []Token {
Token { kind: TokenKindUInt, value: uint64(0) },
Token { kind: TokenKindNewline },
Token { kind: TokenKindUInt, value: uint64(8) },
Token { kind: TokenKindNewline },
Token { kind: TokenKindUInt, value: uint64(83628266) },
Token { kind: TokenKindNewline },
Token { kind: TokenKindUInt, value: uint64(83628266) },

7
lexer/numbers.go
View File

@ -1,7 +1,5 @@
package lexer
import "git.tebibyte.media/sashakoshka/arf/file"
// tokenizeSymbolBeginning lexes a token that starts with a number.
func (lexer *LexingOperation) tokenizeNumberBeginning (negative bool) (err error) {
var number uint64
@ -23,11 +21,6 @@ func (lexer *LexingOperation) tokenizeNumberBeginning (negative bool) (err error
number, fragment, isFloat, err = lexer.tokenizeNumber(10)
} else if lexer.char >= '0' && lexer.char <= '9' {
number, fragment, isFloat, err = lexer.tokenizeNumber(8)
} else {
return file.NewError (
lexer.file.Location(1),
"unexpected character in number literal",
file.ErrorKindError)
}
} else {
number, fragment, isFloat, err = lexer.tokenizeNumber(10)

6
lexer/token.go
View File

@ -24,6 +24,8 @@ const (
TokenKindColon
TokenKindDot
TokenKindElipsis
TokenKindComma
TokenKindLBracket
TokenKindRBracket
@ -133,6 +135,10 @@ func (tokenKind TokenKind) Describe () (description string) {
description = "Colon"
case TokenKindDot:
description = "Dot"
case TokenKindElipsis:
description = "Elipsis"
case TokenKindComma:
description = "Comma"
case TokenKindLBracket:
description = "LBracket"
case TokenKindRBracket:

91
parser/argument.go Normal file
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@ -0,0 +1,91 @@
package parser
import "git.tebibyte.media/sashakoshka/arf/file"
import "git.tebibyte.media/sashakoshka/arf/lexer"
var validArgumentStartTokens = []lexer.TokenKind {
lexer.TokenKindName,
lexer.TokenKindInt,
lexer.TokenKindUInt,
lexer.TokenKindFloat,
lexer.TokenKindString,
lexer.TokenKindRune,
lexer.TokenKindLBrace,
lexer.TokenKindLBracket,
}
func (parser *ParsingOperation) parseArgument () (argument Argument, err error) {
argument.location = parser.token.Location()
err = parser.expect(validArgumentStartTokens...)
if err != nil { return }
switch parser.token.Kind() {
case lexer.TokenKindName:
var identifier Identifier
identifier, err = parser.parseIdentifier()
if err != nil { return }
if parser.token.Is(lexer.TokenKindColon) {
var what Type
what, err = parser.parseType()
if err != nil { return }
if len(identifier.trail) != 1 {
err = parser.token.NewError (
"cannot use member selection in " +
"a variable definition",
file.ErrorKindError)
return
}
argument.kind = ArgumentKindDeclaration
argument.value = Declaration {
location: argument.location,
name: identifier.trail[0],
what: what,
}
} else {
argument.kind = ArgumentKindIdentifier
argument.value = identifier
}
case lexer.TokenKindInt:
argument.kind = ArgumentKindInt
argument.value = parser.token.Value().(int64)
err = parser.nextToken()
case lexer.TokenKindUInt:
argument.kind = ArgumentKindUInt
argument.value = parser.token.Value().(uint64)
err = parser.nextToken()
case lexer.TokenKindFloat:
argument.kind = ArgumentKindFloat
argument.value = parser.token.Value().(float64)
err = parser.nextToken()
case lexer.TokenKindString:
argument.kind = ArgumentKindString
argument.value = parser.token.Value().(string)
parser.nextToken()
case lexer.TokenKindRune:
argument.kind = ArgumentKindRune
argument.value = parser.token.Value().(rune)
parser.nextToken()
// case lexer.TokenKindLBrace:
// case lexer.TokenKindLBracket:
default:
panic (
"unimplemented argument kind " +
parser.token.Kind().Describe())
}
return
}

34
parser/body.go
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@ -1,18 +1,34 @@
package parser
import "git.tebibyte.media/sashakoshka/arf/file"
import "git.tebibyte.media/sashakoshka/arf/lexer"
// parse body parses the body of an arf file, after the metadata header.
func (parser *ParsingOperation) parseBody () (err error) {
err = parser.nextToken(lexer.TokenKindName)
if err != nil { return }
for {
err = parser.expect(lexer.TokenKindName)
if err != nil { return }
switch parser.token.Value().(string) {
case "data":
case "type":
case "func":
case "face":
sectionType := parser.token.Value().(string)
switch sectionType {
case "data":
var section *DataSection
section, err = parser.parseDataSection()
if parser.tree.dataSections == nil {
parser.tree.dataSections =
make(map[string] *DataSection)
}
parser.tree.dataSections[section.name] = section
if err != nil { return }
case "type":
case "face":
case "enum":
case "func":
default:
err = parser.token.NewError (
"unknown section type \"" + sectionType + "\"",
file.ErrorKindError)
return
}
}
return
}

310
parser/data.go
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@ -1,6 +1,312 @@
package parser
// parseData parses a data section
func (parser *ParsingOperation) parseData () (err error) {
import "git.tebibyte.media/sashakoshka/arf/file"
import "git.tebibyte.media/sashakoshka/arf/types"
import "git.tebibyte.media/sashakoshka/arf/lexer"
// parseData parses a data section.
func (parser *ParsingOperation) parseDataSection () (
section *DataSection,
err error,
) {
err = parser.expect(lexer.TokenKindName)
if err != nil { return }
section = &DataSection { location: parser.token.Location() }
err = parser.nextToken(lexer.TokenKindPermission)
if err != nil { return }
section.permission = parser.token.Value().(types.Permission)
err = parser.nextToken(lexer.TokenKindName)
if err != nil { return }
section.name = parser.token.Value().(string)
err = parser.nextToken(lexer.TokenKindColon)
if err != nil { return }
err = parser.nextToken()
if err != nil { return }
section.what, err = parser.parseType()
if err != nil { return }
if parser.token.Is(lexer.TokenKindNewline) {
err = parser.nextToken()
if err != nil { return }
section.value, err = parser.parseInitializationValues(0)
if err != nil { return }
} else {
section.value, err = parser.parseArgument()
if err != nil { return }
err = parser.expect(lexer.TokenKindNewline)
if err != nil { return }
err = parser.nextToken()
if err != nil { return }
}
return
}
// parseInitializationValues starts on the line after a data section, or a set
// phrase. It checks for an indent greater than the indent of the aforementioned
// data section or set phrase (passed through baseIndent), and if there is,
// it parses initialization values.
func (parser *ParsingOperation) parseInitializationValues (
baseIndent int,
) (
initializationArgument Argument,
err error,
) {
// check if line is indented one more than baseIndent
if !parser.token.Is(lexer.TokenKindIndent) { return }
if parser.token.Value().(int) != baseIndent + 1 { return }
initializationArgument.location = parser.token.Location()
err = parser.nextToken()
if err != nil { return }
if parser.token.Is(lexer.TokenKindDot) {
// object initialization
parser.previousToken()
var initializationValues ObjectInitializationValues
initializationValues, err = parser.parseObjectInitializationValues()
initializationArgument.kind = ArgumentKindObjectInitializationValues
initializationArgument.value = &initializationValues
} else {
// array initialization
parser.previousToken()
var initializationValues ArrayInitializationValues
initializationValues, err = parser.parseArrayInitializationValues()
initializationArgument.kind = ArgumentKindArrayInitializationValues
initializationArgument.value = &initializationValues
}
return
}
// parseObjectInitializationValues parses a list of object initialization
// values until the indentation level drops.
func (parser *ParsingOperation) parseObjectInitializationValues () (
initializationValues ObjectInitializationValues,
err error,
) {
println("BEGIN")
defer println("END")
initializationValues.attributes = make(map[string] Argument)
baseIndent := 0
begin := true
for {
// if there is no indent we can just stop parsing
if !parser.token.Is(lexer.TokenKindIndent) { break}
indent := parser.token.Value().(int)
if begin == true {
initializationValues.location = parser.token.Location()
baseIndent = indent
begin = false
}
// do not parse any further if the indent has changed
if indent != baseIndent { break }
println("HIT")
// move on to the beginning of the line, which must contain
// a member initialization value
err = parser.nextToken(lexer.TokenKindDot)
if err != nil { return }
err = parser.nextToken(lexer.TokenKindName)
if err != nil { return }
name := parser.token.Value().(string)
// if the member has already been listed, throw an error
_, exists := initializationValues.attributes[name]
if exists {
err = parser.token.NewError (
"duplicate member \"" + name + "\" in object " +
"member initialization",
file.ErrorKindError)
return
}
// parse the argument determining the member initialization
// value
err = parser.nextToken()
if err != nil { return }
var value Argument
if parser.token.Is(lexer.TokenKindNewline) {
// recurse
err = parser.nextToken(lexer.TokenKindIndent)
if err != nil { return }
value, err = parser.parseInitializationValues(baseIndent)
initializationValues.attributes[name] = value
if err != nil { return }
} else {
// parse as normal argument
value, err = parser.parseArgument()
initializationValues.attributes[name] = value
if err != nil { return }
err = parser.expect(lexer.TokenKindNewline)
if err != nil { return }
err = parser.nextToken()
if err != nil { return }
}
}
return
}
// parseArrayInitializationValues parses a list of array initialization values
// until the indentation lexel drops.
func (parser *ParsingOperation) parseArrayInitializationValues () (
initializationValues ArrayInitializationValues,
err error,
) {
baseIndent := 0
begin := true
for {
// if there is no indent we can just stop parsing
if !parser.token.Is(lexer.TokenKindIndent) { break}
indent := parser.token.Value().(int)
if begin == true {
initializationValues.location = parser.token.Location()
baseIndent = indent
begin = false
}
// do not parse any further if the indent has changed
if indent != baseIndent { break }
// move on to the beginning of the line, which must contain
// arguments
err = parser.nextToken(validArgumentStartTokens...)
if err != nil { return }
for {
// stop parsing this line and go on to the next if a
// newline token is encountered
if parser.token.Is(lexer.TokenKindNewline) {
err = parser.nextToken()
if err != nil { return }
break
}
// otherwise, parse the argument
var argument Argument
argument, err = parser.parseArgument()
if err != nil { return }
initializationValues.values = append (
initializationValues.values,
argument)
}
}
return
}
// parseType parses a type notation of the form Name, {Name}, etc.
func (parser *ParsingOperation) parseType () (what Type, err error) {
err = parser.expect(lexer.TokenKindName, lexer.TokenKindLBrace)
if err != nil { return }
what.location = parser.token.Location()
if parser.token.Is(lexer.TokenKindLBrace) {
what.kind = TypeKindPointer
err = parser.nextToken()
if err != nil { return }
var points Type
points, err = parser.parseType()
if err != nil { return }
what.points = &points
err = parser.expect (
lexer.TokenKindUInt,
lexer.TokenKindRBrace,
lexer.TokenKindElipsis)
if err != nil { return }
if parser.token.Is(lexer.TokenKindUInt) {
what.kind = TypeKindArray
what.length = parser.token.Value().(uint64)
err = parser.nextToken(lexer.TokenKindRBrace)
if err != nil { return }
} else if parser.token.Is(lexer.TokenKindElipsis) {
what.kind = TypeKindArray
err = parser.nextToken(lexer.TokenKindRBrace)
if err != nil { return }
}
err = parser.nextToken()
if err != nil { return }
} else {
what.name, err = parser.parseIdentifier()
if err != nil { return }
}
if parser.token.Is(lexer.TokenKindColon) {
err = parser.nextToken(lexer.TokenKindName)
if err != nil { return }
qualifier := parser.token.Value().(string)
switch qualifier {
case "mut":
what.mutable = true
default:
err = parser.token.NewError (
"unknown type qualifier \"" + qualifier + "\"",
file.ErrorKindError)
return
}
err = parser.nextToken()
if err != nil { return }
}
return
}
// parseIdentifier parses an identifier made out of dot separated names.
func (parser *ParsingOperation) parseIdentifier () (
identifier Identifier,
err error,
) {
err = parser.expect(lexer.TokenKindName)
if err != nil { return }
identifier.location = parser.token.Location()
for {
// TODO: eat up newlines and tabs after the dot, but not before
// it.
if !parser.token.Is(lexer.TokenKindName) { break }
identifier.trail = append (
identifier.trail,
parser.token.Value().(string))
err = parser.nextToken()
if err != nil { return }
if !parser.token.Is(lexer.TokenKindDot) { break }
}
return
}

9
parser/parser.go
View File

@ -111,3 +111,12 @@ func (parser *ParsingOperation) nextToken (allowed ...lexer.TokenKind) (err erro
err = parser.expect(allowed...)
return
}
// previousToken goes back one token. If the parser is already at the beginning,
// this does nothing.
func (parser *ParsingOperation) previousToken () {
parser.tokenIndex --
if parser.tokenIndex < 0 { parser.tokenIndex = 0 }
parser.token = parser.tokens[parser.tokenIndex]
return
}

70
parser/parser_test.go
View File

@ -1,33 +1,75 @@
package parser
import "reflect"
import "io"
import "testing"
// import "git.tebibyte.media/sashakoshka/arf/types"
func checkTree (modulePath string, correct *SyntaxTree, test *testing.T) {
func checkTree (modulePath string, correct string, test *testing.T) {
tree, err := Parse(modulePath)
treeString := tree.ToString(0)
if err != nil {
test.Log("CORRECT TREE:")
test.Log(correct)
test.Log("WHAT WAS PARSED:")
test.Log(treeString)
if err != io.EOF && err != nil {
test.Log("returned error:")
test.Log(err.Error())
test.Fail()
return
}
if !reflect.DeepEqual(tree, correct) {
test.Log("trees not equal")
if treeString != correct {
test.Log("trees not equal!")
test.Fail()
return
}
}
func TestMeta (test *testing.T) {
checkTree("../tests/parser/meta",&SyntaxTree {
license: "GPLv3",
author: "Sasha Koshka",
requires: []string {
"someModule",
"otherModule",
},
}, test)
checkTree ("../tests/parser/meta",
`:arf
author "Sasha Koshka"
license "GPLv3"
require "someModule"
require "otherModule"
---
`, test)
}
func TestData (test *testing.T) {
checkTree ("../tests/parser/data",
`:arf
---
data wr integer:Int 3202
data wr integerArray16:{Int 16}
data wr integerArrayInitialized:{Int 16}
3948
293
293049
948
912
340
0
2304
0
4785
92
data wr integerArrayVariable:{Int ..}
data wr integerPointer:{Int}
data wr mutInteger:Int:mut 3202
data wr mutIntegerPointer:{Int}:mut
data wr nestedObject:Obj
.that
.bird2 123.8439
.bird3 9328.21348239
.this
.bird0 324
.bird1 "hello world"
data wr object:Obj
.that 2139
.this 324
`, test)
}

248
parser/tree-tostring.go Normal file
View File

@ -0,0 +1,248 @@
package parser
import "fmt"
import "sort"
func doIndent (indent int, input ...string) (output string) {
for index := 0; index < indent; index ++ {
output += "\t"
}
for _, inputSection := range input {
output += inputSection
}
return
}
func sortMapKeysAlphabetically[KEY_TYPE any] (
unsortedMap map[string] KEY_TYPE,
) (
sortedKeys []string,
) {
sortedKeys = make([]string, len(unsortedMap))
index := 0
for key, _ := range unsortedMap {
sortedKeys[index] = key
index ++
}
sort.Strings(sortedKeys)
return
}
func (tree *SyntaxTree) ToString (indent int) (output string) {
output += doIndent(indent, ":arf\n")
if tree.author != "" {
output += doIndent(indent, "author \"", tree.author, "\"\n")
}
if tree.license != "" {
output += doIndent(indent, "license \"", tree.license, "\"\n")
}
for _, require := range tree.requires {
output += doIndent(indent, "require \"", require, "\"\n")
}
output += doIndent(indent, "---\n")
dataSectionKeys := sortMapKeysAlphabetically(tree.dataSections)
for _, name := range dataSectionKeys {
output += tree.dataSections[name].ToString(indent)
}
return
}
func (identifier *Identifier) ToString () (output string) {
for index, trailItem := range identifier.trail {
if index > 0 {
output += "."
}
output += trailItem
}
return
}
func (what *Type) ToString () (output string) {
if what.kind == TypeKindBasic {
output += what.name.ToString()
} else {
output += "{"
output += what.points.ToString()
if what.kind == TypeKindArray {
output += " "
if what.length == 0 {
output += ".."
} else {
output += fmt.Sprint(what.length)
}
}
output += "}"
}
if what.mutable {
output += ":mut"
}
return
}
func (declaration *Declaration) ToString () (output string) {
output += declaration.name + ":"
output += declaration.what.ToString()
return
}
func (attributes *ObjectInitializationValues) ToString (
indent int,
) (
output string,
) {
for _, name := range sortMapKeysAlphabetically(attributes.attributes) {
value := attributes.attributes[name]
output += doIndent(indent, ".", name, " ")
if value.kind == ArgumentKindObjectInitializationValues {
output += "\n"
output += value.ToString(indent + 1, true)
} else {
output += value.ToString(0, false) + "\n"
}
}
return
}
func (values *ArrayInitializationValues) ToString (
indent int,
) (
output string,
) {
for _, value := range values.values {
output += value.ToString(indent, true)
}
return
}
func (phrase *Phrase) ToString (indent int, breakLine bool) (output string) {
if breakLine {
output += doIndent (
indent,
"[", phrase.command.ToString(0, false))
output += "\n"
for _, argument := range phrase.arguments {
output += doIndent (
indent,
argument.ToString(indent + 1, true))
}
} else {
output += "[" + phrase.command.ToString(0, false)
for _, argument := range phrase.arguments {
output += " " + argument.ToString(0, false)
}
}
output += "]"
if len(phrase.returnsTo) > 0 {
output += " ->"
for _, returnItem := range phrase.returnsTo {
output += " " + returnItem.ToString(0, false)
}
}
if breakLine {
output += "\n"
}
return
}
func (argument *Argument) ToString (indent int, breakLine bool) (output string) {
if !breakLine { indent = 0 }
if argument.kind == ArgumentKindNil {
output += "NIL-ARGUMENT"
if breakLine { output += "\n" }
return
}
switch argument.kind {
case ArgumentKindPhrase:
output += argument.value.(*Phrase).ToString (
indent,
breakLine)
case ArgumentKindObjectInitializationValues:
// this should only appear in contexts where breakLine is true
output += argument.value.(*ObjectInitializationValues).
ToString(indent)
case ArgumentKindArrayInitializationValues:
// this should only appear in contexts where breakLine is true
output += argument.value.(*ArrayInitializationValues).
ToString(indent)
case ArgumentKindIdentifier:
output += doIndent (
indent,
argument.value.(*Identifier).ToString())
if breakLine { output += "\n" }
case ArgumentKindDeclaration:
output += doIndent (
indent,
argument.value.(*Declaration).ToString())
if breakLine { output += "\n" }
case ArgumentKindInt, ArgumentKindUInt, ArgumentKindFloat:
output += doIndent(indent, fmt.Sprint(argument.value))
if breakLine { output += "\n" }
case ArgumentKindString:
output += doIndent (
indent,
"\"" + argument.value.(string) + "\"")
if breakLine { output += "\n" }
case ArgumentKindRune:
output += doIndent (
indent,
"'" + string(argument.value.(rune)) + "'")
if breakLine { output += "\n" }
case ArgumentKindOperator:
// TODO
// also when parsing this argument kind, don't do it in the
// argument parsing function. do it specifically when parsing a
// phrase command.
}
return
}
func (section *DataSection) ToString (indent int) (output string) {
output += doIndent (
indent,
"data ",
section.permission.ToString(), " ",
section.name, ":",
section.what.ToString())
isComplexInitialization :=
section.value.kind == ArgumentKindObjectInitializationValues ||
section.value.kind == ArgumentKindArrayInitializationValues
if section.value.value == nil {
output += "\n"
} else if isComplexInitialization {
output += "\n"
output += section.value.ToString(indent + 1, true)
} else {
output += " " + section.value.ToString(0, false)
output += "\n"
}
return
}

152
parser/tree.go
View File

@ -1,5 +1,8 @@
package parser
import "git.tebibyte.media/sashakoshka/arf/file"
import "git.tebibyte.media/sashakoshka/arf/types"
// SyntaxTree represents an abstract syntax tree. It covers an entire module. It
// can be expected to be syntactically correct, but it might not be semantically
// correct (because it has not been analyzed yet.)
@ -7,5 +10,152 @@ type SyntaxTree struct {
license string
author string
requires []string
requires []string
dataSections map[string] *DataSection
}
// Identifier represents a chain of arguments separated by a dot.
type Identifier struct {
location file.Location
trail []string
}
// TypeKind represents what kind of type a type is
type TypeKind int
const (
// TypeKindBasic either means it's a primitive, or it inherits from
// something.
TypeKindBasic TypeKind = iota
// TypeKindPointer means it's a pointer
TypeKindPointer
// TypeKindArray means it's an array.
TypeKindArray
)
// Type represents a type specifier
type Type struct {
location file.Location
mutable bool
kind TypeKind
// only applicable for arrays. a value of zero means it has an
// undefined/dynamic length.
length uint64
// only applicable for basic.
name Identifier
// not applicable for basic.
points *Type
}
// Declaration represents a variable declaration.
type Declaration struct {
location file.Location
name string
what Type
}
// ObjectInitializationValues represents a list of object member initialization
// attributes.
type ObjectInitializationValues struct {
location file.Location
attributes map[string] Argument
}
// ArrayInitializationValues represents a list of attributes initializing an
// array.
type ArrayInitializationValues struct {
location file.Location
values []Argument
}
// Phrase represents a function call or operator. In ARF they are the same
// syntactical concept.
type Phrase struct {
location file.Location
command Argument
arguments []Argument
returnsTo []Argument
}
// ArgumentKind specifies the type of thing the value of an argument should be
// cast to.
type ArgumentKind int
const (
ArgumentKindNil ArgumentKind = iota
// [name argument]
// [name argument argument]
// etc...
ArgumentKindPhrase = iota
// {name}
ArgumentKindDereference
// {name 23}
ArgumentKindSubscript
// .name value
// but like, a lot of them
ArgumentKindObjectInitializationValues
// value value...
ArgumentKindArrayInitializationValues
// name.name
// name.name.name
// etc...
ArgumentKindIdentifier
// name:Type
// name:{Type}
// name:{Type ..}
// name:{Type 23}
// etc...
ArgumentKindDeclaration
// -1337
ArgumentKindInt
// 1337
ArgumentKindUInt
// 0.44
ArgumentKindFloat
// "hello world"
ArgumentKindString
// 'S'
ArgumentKindRune
// + - * / etc...
// this is only used as a phrase command
ArgumentKindOperator
)
// Argument represents a value that can be placed anywhere a value goes. This
// allows things like phrases being arguments to other phrases.
type Argument struct {
location file.Location
kind ArgumentKind
value any
// TODO: if there is an argument expansion operator its existence should
// be stored here in a boolean.
}
// DataSection represents a global variable.
type DataSection struct {
location file.Location
name string
what Type
value Argument
permission types.Permission
}

2
tests/lexer/all.arf
View File

@ -1,3 +1,3 @@
:arf
--- rw -> -349820394 932748397 239485.37520 "hello world!\n" 'E' helloWorld:.[]{}
--- rw -> -349820394 932748397 239485.37520 "hello world!\n" 'E' helloWorld:.,..[]{}
+ - ++ -- * / @ ! % ~ < << > >> | || & &&

2
tests/lexer/numbers.arf
View File

@ -1,4 +1,6 @@
:arf
0
8
83628266
0b100111111000001000011101010
0x4Fc10Ea

45
tests/parser/data/main.arf
View File

@ -3,25 +3,50 @@
data wr integer:Int 3202
data wr mutInteger:Int:mut 3202
data wr integerPointer:{Int}
# TODO: data wr integerPointer:{Int} [& integer]
data wr mutIntegerPointer:{Int}:mut
data wr integerArray16:{Int 16}
data wr integerArrayVariable:{Int ...}
data wr integerArrayVariable:{Int ..}
data wr integerArrayInitialized:{Int 16}
3948 293 293049 948 912
340 0 2304 0 4785 92
# TODO: reinstate these two after phrase parsing is implemented
# data wr integerPointerInit:{Int} [& integer]
# data wr mutIntegerPointerInit:{Int}:mut [& integer]
data wr object:Obj
: this 324
: that 2139
.this 324
.that 2139
data wr nestedObject:Obj
: this
: bird0 324
: bird1 "hello world"
: that
: bird2 123.8439
: bird3 9328.21348239
.this
.bird0 324
.bird1 "hello world"
.that
.bird2 123.8439
.bird3 9328.21348239
# func rr main
# ---
# # TODO: set should be a special case, checking under itself for object
# member initialization args. it should also check for args in general
# under there which should be treated as array initialization args.
# basically, under a set phrase, it should do the same checks that it
# does under a data section.
#
# [set object:Obj]
# .this 324
# .that 2139
#
# set object:Obj
# .this 324
# .that 2139

16
types/permission.go
View File

@ -30,3 +30,19 @@ func PermissionFrom (data string) (permission Permission) {
permission.External = ModeFrom(rune(data[1]))
return
}
func (mode Mode) ToString () (output string) {
switch mode {
case ModeNone: output = "n"
case ModeRead: output = "r"
case ModeWrite: output = "w"
}
return
}
func (permission Permission) ToString () (output string) {
output += permission.Internal.ToString()
output += permission.External.ToString()
return
}