return value;

}

/// Parse integer literal text as an i64.

fn parseIntegerText(text: *[u8]) -> ?i64 {

        return nil;

    };

        if literal.magnitude > parser::I64_MIN_MAGNITUDE {

            return nil;

        }

        if literal.magnitude == parser::I64_MIN_MAGNITUDE {

            return parser::I64_MIN;

/// Parsed integer literal metadata.

export record IntLiteral {

    /// Raw characters that comprised the literal.

    text: *[u8],

    magnitude: u64,

    /// Radix used by the literal.

    radix: Radix,

}

/// Format a u32 by writing it to the provided buffer.

export fn formatU32(val: u32, buffer: *mut [u8]) -> *[u8] {

    assert buffer.len >= U32_STR_LEN;

        case '0'  => return 0,

        else      => return ch,

    }

}

export fn parseInt(text: *[u8]) -> IntLiteral throws (ParseError) {

    if text.len == 0 {

        throw ParseError::Invalid;

    }

    let mut start: u32 = 0;

    let mut radix: u32 = 10;

    let mut radixType = Radix::Decimal;

    if start + 1 < text.len and text[start] == '0' {

        let prefix = text[start + 1];

        if prefix == 'x' or prefix == 'X' {

            set radix = 16;

            set radixType = Radix::Hex;

        if value > U64_MAX - (digit as u64) {

            throw ParseError::Overflow;

        }

        set value += (digit as u64);

    }

}

/// Process escape sequences in a raw string, writing the result into `dst`.

/// Returns the number of bytes written.

export fn unescapeString(raw: *[u8], dst: *mut [u8]) -> u32 {

    return val;

}

/// Lower a unary operation.

fn lowerUnOp(self: *mut FnLowerer, node: *ast::Node, unop: ast::UnOp) -> il::Val throws (LowerError) {

    let val = try lowerExpr(self, unop.value);

    let t = try typeOf(self, node);

    let typ = ilType(self.low, t);

    let dst = nextReg(self);

    let mut needsExt: bool = false;

        }

        case ast::NodeValue::ScopeAccess(_) => {

            set val = try lowerScopeAccess(self, node);

        }

        case ast::NodeValue::Number(lit) => {

        }

        case ast::NodeValue::Bool(b) => {

            set val = il::Val::Imm(1) if b else il::Val::Imm(0);

        }

        case ast::NodeValue::Char(c) => {

{

    try expect(p, scanner::TokenKind::Try, "expected `try`");

    let shouldPanic = consume(p, scanner::TokenKind::Bang);

    let returnsOptional = consume(p, scanner::TokenKind::Question);

    let mut catches = ast::nodeSlice(p.arena, 4);

    while consume(p, scanner::TokenKind::Catch) {

        let mut binding: ?*ast::Node = nil;

        let mut typeNode: ?*ast::Node = nil;

    let lit = try parseNumberLiteral("1234");

    try testing::expect(lit.magnitude == 1234);

    try testing::expect(lit.radix == fmt::Radix::Decimal);

}

@test fn testParseNumberMetadata() throws (testing::TestError) {

    let lit = try parseNumberLiteral("0xFF");

    try testing::expect(lit.magnitude == 0xFF);

    try testing::expect(lit.radix == fmt::Radix::Hex);

}

/// Verify that binary literals capture their radix.

@test fn testParseBinaryLiteralMetadata() throws (testing::TestError) {

    let lit = try parseNumberLiteral("0b1010");

    try testing::expect(lit.magnitude == 0b1010);

    try testing::expect(lit.radix == fmt::Radix::Binary);

}

}

}

/// Range expressions parse with explicit start and end bounds.

@test fn testParseRangeExpr() throws (testing::TestError) {

    let node = try! parseExprStr("0..5");

    // 2^64 overflows u64.

    try expectNumberLiteralFail("18446744073709551616");

    try expectNumberLiteralFail("0x10000000000000000");

    try expectNumberLiteralFail("0x1G");

    try expectNumberLiteralFail("0b102");

}

/// Test parsing nil literal.

@test fn testParseNil() throws (testing::TestError) {

    let r1 = try! parseExprStr("nil");

    try expectIdent(node.expr, "value");

    try testing::expect(node.catches.len == 0);

    try testing::expect(not node.shouldPanic);

}

/// Test parsing a `try!` expression that panics on error.

@test fn testParseTryBang() throws (testing::TestError) {

    let root = try! parseExprStr("try! value");

    let case ast::NodeValue::Try(node) = root.value

        else throw testing::TestError::Failed;

                // For unsuffixed integer expressions (`Type::Int`), only

                // validate literals directly written by the programmer.

                // Folded results (e.g. `0 - 65`) may not fit the target

                // type but are valid wrapping arithmetic at runtime.

                if let value = constValueEntry(self, rval) {

                        if validateConstIntRange(value, to) {

                            return Coercion::Identity;

                        }

                        return nil;

                    }

        },

        case ast::NodeValue::Number(lit) => {

            setNodeConstValue(self, node, ConstValue::Int(ConstInt {

                magnitude: lit.magnitude,

                bits: 64,

            }));

            return setNodeType(self, node, Type::Int);

        },

        case ast::NodeValue::Placeholder => {

            return setNodeType(self, node, hint);

    setNodeType(self, decl.value, bindingTy);

    return Type::Void;

}

    }

}

/// Determine whether a node represents a compile-time constant expression.

export fn isConstExpr(self: *Resolver, node: *ast::Node) -> bool {

    match node.value {

    try expectAnalyzeOk("let x: i16 = -32768;");

    try expectAnalyzeOk("let x: u16 = 0xFFFF;");

    try expectAnalyzeOk("let x: i32 = 2147483647;");

    try expectAnalyzeOk("let x: i32 = -2147483648;");

    try expectAnalyzeOk("let x: u32 = 0xFFFFFFFF;");

    try expectAnalyzeOk("constant LIMIT: u8 = 0xFF;");

    try expectIntMismatch("let x: i8 = 128;", super::Type::I8);

    try expectIntMismatch("let x: i8 = -129;", super::Type::I8);

    try expectIntMismatch("let x: i32 = 2147483648;", super::Type::I32);

    try expectIntMismatch("let x: i32 = -2147483649;", super::Type::I32);

    try expectIntMismatch("let x: i32 = 0xFFFFFFFF;", super::Type::I32);

    try expectIntMismatch("let x: u32 = -1;", super::Type::U32);

    try expectIntMismatch("let x: u32 = 0x100000000;", super::Type::U32);

    try expectIntMismatch("constant LIMIT: u8 = 512;", super::Type::U8);

    try expectIntMismatch("constant LIMIT: u8 = -5;", super::Type::U8);

}

@test fn testNilCoercions() throws (testing::TestError) {

    }

}

/// Scan numeric literal (decimal, hex, or binary).

fn scanNumber(s: *mut Scanner) -> Token {

    // Check for hex literal (`0x` or `0X` prefix).

    if s.source[s.cursor - 1] == '0' {

        if let ch = current(s); ch == 'x' or ch == 'X' {

            advance(s);

            // Must have at least one hex digit after `0x`.

                return tok(s, TokenKind::Arrow);

            }

            if consume(s, '=') {

                return tok(s, TokenKind::MinusEqual);

            }

            return tok(s, TokenKind::Minus);

        }

        case '+' => {

            if consume(s, '=') {

                return tok(s, TokenKind::PlusEqual);

            }

            return tok(s, TokenKind::Plus);

        }

        case '/' => {

            if consume(s, '=') {

                return tok(s, TokenKind::SlashEqual);

    try testing::expect(tok.source.len == 7);

}

@test fn testScanNumbers() throws (testing::TestError) {

    let mut s = testScanner(

    );

}

@test fn testScanKeywords() throws (testing::TestError) {

    let mut s = testScanner("nil mod not static");

    let tok1: super::Token = super::next(&mut s);

    let dec = try fmt::parseInt("123") catch {

        throw testing::TestError::Failed;

    };

    try testing::expect(dec.magnitude == 123);

    try testing::expect(dec.radix == fmt::Radix::Decimal);

        throw testing::TestError::Failed;

    };

    try testing::expect(hex.magnitude == 42);

    try testing::expect(hex.radix == fmt::Radix::Hex);

        throw testing::TestError::Failed;

    };

    try testing::expect(bin.magnitude == 5);

    try testing::expect(bin.radix == fmt::Radix::Binary);

}

@test fn testDigitFromAscii() throws (testing::TestError) {

    let zero = fmt::digitFromAscii('0', 10) else throw testing::TestError::Failed;

    try testing::expect(zero == 0);

        return;

    };

    throw testing::TestError::Failed;

}

@test fn testParseIntLiteralTextInvalidDigitErrors() throws (testing::TestError) {

    try fmt::parseInt("0b2") catch {

        return;

    };

    throw testing::TestError::Failed;

  @assert.fail29

    unreachable;

  @assert.ok30

    ret 0;

}

  @assert.fail35

    unreachable;

  @assert.ok36

    ret 0;

}

  @assert.fail19

    unreachable;

  @assert.ok20

    ret 0;

}

  @assert.fail13

    unreachable;

  @assert.ok14

    ret 0;

}

  @assert.fail37

    unreachable;

  @assert.ok38

    ret 0;

}

  @assert.fail17

    unreachable;

  @assert.ok18

    ret 0;

}

  @assert.fail23

    unreachable;

  @assert.ok24

    ret 0;

}

/// Returns the arithmetic negation of its argument.

fn neg(x: i32) -> i32 {

    return -x;

}

/// Returns the arithmetic negation of an i8.

fn negI8(x: i8) -> i8 {

    return -x;

}

  @entry0

    neg w32 %1 %0;

    ret %1;

}

fn w8 $negI8(w8 %0) {

  @entry0

    neg w8 %1 %0;

    sext w8 %2 %1;

    ret %2;