Merge pull request 'bitwise' (#36) from bitwise into main

Reviewed-on: #36

src/compiler/compiler.ts

@@ -243,6 +243,24 @@ export class Compiler {
           case '%':
             instructions.push(['MOD'])
             break
+          case 'band':
+            instructions.push(['BIT_AND'])
+            break
+          case 'bor':
+            instructions.push(['BIT_OR'])
+            break
+          case 'bxor':
+            instructions.push(['BIT_XOR'])
+            break
+          case '<<':
+            instructions.push(['BIT_SHL'])
+            break
+          case '>>':
+            instructions.push(['BIT_SHR'])
+            break
+          case '>>>':
+            instructions.push(['BIT_USHR'])
+            break
           default:
             throw new CompilerError(`Unsupported binary operator: ${opValue}`, op.from, op.to)
         }

src/compiler/tests/bitwise.test.ts

@@ -0,0 +1,178 @@
+import { expect, describe, test } from 'bun:test'
+
+describe('bitwise operators', () => {
+  describe('band (bitwise AND)', () => {
+    test('basic AND operation', () => {
+      expect('5 band 3').toEvaluateTo(1)
+      // 5 = 0101, 3 = 0011, result = 0001 = 1
+    })
+
+    test('AND with zero', () => {
+      expect('5 band 0').toEvaluateTo(0)
+    })
+
+    test('AND with all bits set', () => {
+      expect('15 band 7').toEvaluateTo(7)
+      // 15 = 1111, 7 = 0111, result = 0111 = 7
+    })
+
+    test('AND in assignment', () => {
+      expect('x = 12 band 10').toEvaluateTo(8)
+      // 12 = 1100, 10 = 1010, result = 1000 = 8
+    })
+  })
+
+  describe('bor (bitwise OR)', () => {
+    test('basic OR operation', () => {
+      expect('5 bor 3').toEvaluateTo(7)
+      // 5 = 0101, 3 = 0011, result = 0111 = 7
+    })
+
+    test('OR with zero', () => {
+      expect('5 bor 0').toEvaluateTo(5)
+    })
+
+    test('OR with all bits set', () => {
+      expect('8 bor 4').toEvaluateTo(12)
+      // 8 = 1000, 4 = 0100, result = 1100 = 12
+    })
+  })
+
+  describe('bxor (bitwise XOR)', () => {
+    test('basic XOR operation', () => {
+      expect('5 bxor 3').toEvaluateTo(6)
+      // 5 = 0101, 3 = 0011, result = 0110 = 6
+    })
+
+    test('XOR with itself returns zero', () => {
+      expect('5 bxor 5').toEvaluateTo(0)
+    })
+
+    test('XOR with zero returns same value', () => {
+      expect('7 bxor 0').toEvaluateTo(7)
+    })
+
+    test('XOR in assignment', () => {
+      expect('result = 8 bxor 12').toEvaluateTo(4)
+      // 8 = 1000, 12 = 1100, result = 0100 = 4
+    })
+  })
+
+  describe('bnot (bitwise NOT)', () => {
+    test('NOT of positive number', () => {
+      expect('bnot 5').toEvaluateTo(-6)
+      // ~5 = -6 (two\'s complement)
+    })
+
+    test('NOT of zero', () => {
+      expect('bnot 0').toEvaluateTo(-1)
+    })
+
+    test('NOT of negative number', () => {
+      expect('bnot -1').toEvaluateTo(0)
+    })
+
+    test('double NOT returns original', () => {
+      expect('bnot (bnot 5)').toEvaluateTo(5)
+    })
+  })
+
+  describe('<< (left shift)', () => {
+    test('basic left shift', () => {
+      expect('5 << 2').toEvaluateTo(20)
+      // 5 << 2 = 20
+    })
+
+    test('shift by zero', () => {
+      expect('5 << 0').toEvaluateTo(5)
+    })
+
+    test('shift by one', () => {
+      expect('3 << 1').toEvaluateTo(6)
+    })
+
+    test('large shift', () => {
+      expect('1 << 10').toEvaluateTo(1024)
+    })
+  })
+
+  describe('>> (signed right shift)', () => {
+    test('basic right shift', () => {
+      expect('20 >> 2').toEvaluateTo(5)
+      // 20 >> 2 = 5
+    })
+
+    test('shift by zero', () => {
+      expect('20 >> 0').toEvaluateTo(20)
+    })
+
+    test('preserves sign for negative numbers', () => {
+      expect('-20 >> 2').toEvaluateTo(-5)
+      // Sign is preserved
+    })
+
+    test('negative number right shift', () => {
+      expect('-8 >> 1').toEvaluateTo(-4)
+    })
+  })
+
+  describe('>>> (unsigned right shift)', () => {
+    test('basic unsigned right shift', () => {
+      expect('20 >>> 2').toEvaluateTo(5)
+    })
+
+    test('unsigned shift of -1', () => {
+      expect('-1 >>> 1').toEvaluateTo(2147483647)
+      // -1 >>> 1 = 2147483647 (unsigned, no sign extension)
+    })
+
+    test('unsigned shift of negative number', () => {
+      expect('-8 >>> 1').toEvaluateTo(2147483644)
+    })
+  })
+
+  describe('compound expressions', () => {
+    test('multiple bitwise operations', () => {
+      expect('(5 band 3) bor (8 bxor 12)').toEvaluateTo(5)
+      // (5 & 3) | (8 ^ 12) = 1 | 4 = 5
+    })
+
+    test('bitwise with variables', () => {
+      expect(`
+        a = 5
+        b = 3
+        a bor b
+      `).toEvaluateTo(7)
+    })
+
+    test('shift operations with variables', () => {
+      expect(`
+        x = 16
+        y = 2
+        x >> y
+      `).toEvaluateTo(4)
+    })
+
+    test('mixing shifts and bitwise', () => {
+      expect('(8 << 1) band 15').toEvaluateTo(0)
+      // (8 << 1) & 15 = 16 & 15 = 0
+    })
+
+    test('mixing shifts and bitwise 2', () => {
+      expect('(7 << 1) band 15').toEvaluateTo(14)
+      // (7 << 1) & 15 = 14 & 15 = 14
+    })
+  })
+
+  describe('precedence', () => {
+    test('bitwise has correct precedence with arithmetic', () => {
+      expect('1 + 2 band 3').toEvaluateTo(3)
+      // (1 + 2) & 3 = 3 & 3 = 3
+    })
+
+    test('shift has correct precedence', () => {
+      expect('4 + 8 << 1').toEvaluateTo(24)
+      // (4 + 8) << 1 = 12 << 1 = 24
+    })
+  })
+})

src/parser/operatorTokenizer.ts

@@ -5,6 +5,12 @@ type Operator = { str: string; tokenName: keyof typeof terms }
 const operators: Array<Operator> = [
   { str: 'and', tokenName: 'And' },
   { str: 'or', tokenName: 'Or' },
+  { str: 'band', tokenName: 'Band' },
+  { str: 'bor', tokenName: 'Bor' },
+  { str: 'bxor', tokenName: 'Bxor' },
+  { str: '>>>', tokenName: 'Ushr' },  // Must come before >>
+  { str: '>>', tokenName: 'Shr' },
+  { str: '<<', tokenName: 'Shl' },
   { str: '>=', tokenName: 'Gte' },
   { str: '<=', tokenName: 'Lte' },
   { str: '!=', tokenName: 'Neq' },

src/parser/shrimp.grammar

@@ -6,7 +6,7 @@
 
 @top Program { item* }
 
-@external tokens operatorTokenizer from "./operatorTokenizer" { Star, Slash, Plus, Minus, And, Or, Eq, EqEq, Neq, Lt, Lte, Gt, Gte, Modulo, PlusEq, MinusEq, StarEq, SlashEq, ModuloEq }
+@external tokens operatorTokenizer from "./operatorTokenizer" { Star, Slash, Plus, Minus, And, Or, Eq, EqEq, Neq, Lt, Lte, Gt, Gte, Modulo, PlusEq, MinusEq, StarEq, SlashEq, ModuloEq, Band, Bor, Bxor, Shl, Shr, Ushr }
 
 @tokens {
   @precedence { Number Regex }
@@ -51,6 +51,7 @@ null { @specialize[@name=Null]<Identifier, "null"> }
   comparison @left,
   multiplicative @left,
   additive @left,
+  bitwise @left,
   call,
   functionWithNewlines
 }
@@ -189,7 +190,13 @@ BinOp {
   (expression | BinOp) !multiplicative Star (expression | BinOp) |
   (expression | BinOp) !multiplicative Slash (expression | BinOp) |
   (expression | BinOp) !additive Plus (expression | BinOp) |
-  (expression | BinOp) !additive Minus (expression | BinOp)
+  (expression | BinOp) !additive Minus (expression | BinOp) |
+  (expression | BinOp) !bitwise Band (expression | BinOp) |
+  (expression | BinOp) !bitwise Bor (expression | BinOp) |
+  (expression | BinOp) !bitwise Bxor (expression | BinOp) |
+  (expression | BinOp) !bitwise Shl (expression | BinOp) |
+  (expression | BinOp) !bitwise Shr (expression | BinOp) |
+  (expression | BinOp) !bitwise Ushr (expression | BinOp)
 }
 
 ParenExpr {

src/parser/shrimp.terms.ts

@@ -19,49 +19,55 @@ export const
   StarEq = 17,
   SlashEq = 18,
   ModuloEq = 19,
-  Identifier = 20,
+  Band = 20,
-  AssignableIdentifier = 21,
+  Bor = 21,
-  Word = 22,
+  Bxor = 22,
-  IdentifierBeforeDot = 23,
+  Shl = 23,
-  Do = 24,
+  Shr = 24,
-  Comment = 25,
+  Ushr = 25,
-  Program = 26,
+  Identifier = 26,
-  PipeExpr = 27,
+  AssignableIdentifier = 27,
-  WhileExpr = 29,
+  Word = 28,
-  keyword = 71,
+  IdentifierBeforeDot = 29,
-  ConditionalOp = 31,
+  Do = 30,
-  ParenExpr = 32,
+  Comment = 31,
-  FunctionCallWithNewlines = 33,
+  Program = 32,
-  DotGet = 34,
+  PipeExpr = 33,
-  Number = 35,
+  WhileExpr = 35,
-  PositionalArg = 36,
+  keyword = 77,
-  FunctionDef = 37,
+  ConditionalOp = 37,
-  Params = 38,
+  ParenExpr = 38,
-  NamedParam = 39,
+  FunctionCallWithNewlines = 39,
-  NamedArgPrefix = 40,
+  DotGet = 40,
-  String = 41,
+  Number = 41,
-  StringFragment = 42,
+  PositionalArg = 42,
-  Interpolation = 43,
+  FunctionDef = 43,
-  EscapeSeq = 44,
+  Params = 44,
-  Boolean = 45,
+  NamedParam = 45,
-  Null = 46,
+  NamedArgPrefix = 46,
-  colon = 47,
+  String = 47,
-  CatchExpr = 48,
+  StringFragment = 48,
-  Block = 50,
+  Interpolation = 49,
-  FinallyExpr = 51,
+  EscapeSeq = 50,
-  Underscore = 54,
+  Boolean = 51,
-  NamedArg = 55,
+  Null = 52,
-  IfExpr = 56,
+  colon = 53,
-  FunctionCall = 58,
+  CatchExpr = 54,
-  ElseIfExpr = 59,
+  Block = 56,
-  ElseExpr = 61,
+  FinallyExpr = 57,
-  FunctionCallOrIdentifier = 62,
+  Underscore = 60,
-  BinOp = 63,
+  NamedArg = 61,
-  Regex = 64,
+  IfExpr = 62,
-  Dict = 65,
+  FunctionCall = 64,
-  Array = 66,
+  ElseIfExpr = 65,
-  FunctionCallWithBlock = 67,
+  ElseExpr = 67,
-  TryExpr = 68,
+  FunctionCallOrIdentifier = 68,
-  Throw = 70,
+  BinOp = 69,
-  CompoundAssign = 72,
+  Regex = 70,
-  Assign = 73
+  Dict = 71,
+  Array = 72,
+  FunctionCallWithBlock = 73,
+  TryExpr = 74,
+  Throw = 76,
+  CompoundAssign = 78,
+  Assign = 79

src/parser/shrimp.ts

@@ -4,24 +4,24 @@ import {operatorTokenizer} from "./operatorTokenizer"
 import {tokenizer, specializeKeyword} from "./tokenizer"
 import {trackScope} from "./parserScopeContext"
 import {highlighting} from "./highlight"
-const spec_Identifier = {__proto__:null,while:60, null:92, catch:98, finally:104, end:106, if:114, else:120, try:138, throw:142}
+const spec_Identifier = {__proto__:null,while:72, null:104, catch:110, finally:116, end:118, if:126, else:132, try:150, throw:154}
 export const parser = LRParser.deserialize({
   version: 14,
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   propSources: [highlighting],
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   repeatNodeCount: 12,
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-  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO#R~~", 11)],
+  tokenizers: [operatorTokenizer, 1, 2, 3, tokenizer, new LocalTokenGroup("[~RP!O!PU~ZO#X~~", 11)],
-  topRules: {"Program":[0,26]},
+  topRules: {"Program":[0,32]},
-  specialized: [{term: 20, get: (value: any, stack: any) => (specializeKeyword(value, stack) << 1), external: specializeKeyword},{term: 20, get: (value: keyof typeof spec_Identifier) => spec_Identifier[value] || -1}],
+  specialized: [{term: 26, get: (value: any, stack: any) => (specializeKeyword(value, stack) << 1), external: specializeKeyword},{term: 26, get: (value: keyof typeof spec_Identifier) => spec_Identifier[value] || -1}],
-  tokenPrec: 1922
+  tokenPrec: 2109
 })

src/parser/tests/bitwise.test.ts

@@ -0,0 +1,72 @@
+import { expect, describe, test } from 'bun:test'
+
+import '../shrimp.grammar' // Importing this so changes cause it to retest!
+
+describe('bitwise operators - grammar', () => {
+  test('parses band (bitwise AND)', () => {
+    expect('5 band 3').toMatchTree(`
+      BinOp
+        Number 5
+        Band band
+        Number 3`)
+  })
+
+  test('parses bor (bitwise OR)', () => {
+    expect('5 bor 3').toMatchTree(`
+      BinOp
+        Number 5
+        Bor bor
+        Number 3`)
+  })
+
+  test('parses bxor (bitwise XOR)', () => {
+    expect('5 bxor 3').toMatchTree(`
+      BinOp
+        Number 5
+        Bxor bxor
+        Number 3`)
+  })
+
+  test('parses << (left shift)', () => {
+    expect('5 << 2').toMatchTree(`
+      BinOp
+        Number 5
+        Shl <<
+        Number 2`)
+  })
+
+  test('parses >> (signed right shift)', () => {
+    expect('20 >> 2').toMatchTree(`
+      BinOp
+        Number 20
+        Shr >>
+        Number 2`)
+  })
+
+  test('parses >>> (unsigned right shift)', () => {
+    expect('-1 >>> 1').toMatchTree(`
+      BinOp
+        Number -1
+        Ushr >>>
+        Number 1`)
+  })
+
+  test('parses bnot (bitwise NOT) as function call', () => {
+    expect('bnot 5').toMatchTree(`
+      FunctionCall
+        Identifier bnot
+        PositionalArg
+          Number 5`)
+  })
+
+  test('bitwise operators work in expressions', () => {
+    expect('x = 5 band 3').toMatchTree(`
+      Assign
+        AssignableIdentifier x
+        Eq =
+        BinOp
+          Number 5
+          Band band
+          Number 3`)
+  })
+})

src/prelude/index.ts

@@ -63,6 +63,7 @@ export const globals = {
 
   // boolean/logic
   not: (v: any) => !v,
+  bnot: (n: number) => ~(n | 0),
 
   // utilities
   inc: (n: number) => n + 1,