use std::fmt;

use std::io;

use std::lang::alloc;

use std::lang::ast;

use std::lang::parser;

use std::lang::resolver;

use std::lang::module;

use std::lang::strings;

use std::lang::package;

use std::lang::il;

        throw Error::Other;

    }

    // Commit only what was read.

    alloc::commit(sourceArena, source.len);

        throw Error::Other;

    };

    try module::setAst(graph, moduleId, ast) catch {

        io::printError("radiance: error setting AST\n");

        throw Error::Other;

    allocator: alloc::Allocator,

    /// Current parsing context (normal or conditional).

    context: Context,

}

    return Parser {

        current: scanner::invalid(0, ""),

        previous: scanner::invalid(0, ""),

        errors: ErrorList { list: undefined, count: 0 },

        arena,

        allocator: ast::nodeAllocator(arena),

    }

}

/// Fail the parsing process with the given error.

fn failParsing(p: *mut Parser, err: *[u8]) -> ParseError {

    return ParseError::UnexpectedToken;

}

/// Print all errors that have been collected during parsing.

    for i in 0..p.errors.count {

        let e = p.errors.list[i];

        if let loc = scanner::getLocation(

        ) {

            io::printU32(loc.line as u32);

            io::print(":");

            io::printU32(loc.col as u32);

        }

        io::print(e.message);

    }

}

/// Check whether the current token matches the expected kind.

pub fn check(p: *Parser, kind: scanner::TokenKind) -> bool {

        ident: binding.name, type: binding.type, value, alignment: binding.alignment, mutable,

    }));

}

/// Parse a module from source text using the provided arena for node storage.

    throws (ParseError)

{

}

/// Parse a complete module into a block of top-level statements.

///

/// This is the main entry point for parsing an entire Radiance source file.

/// Parse multiple statements from a string.

fn parseStmtsStr(input: *[u8]) -> *ast::Node

    throws (testing::TestError)

{

    let mut arena = ast::nodeArena(&mut ARENA_STORAGE[..]);

    return try super::parseModule(&mut parser) catch {

        throw testing::TestError::Failed;

    };

}

/// Parse a single type from a string.

fn parseTypeStr(input: *[u8]) -> *ast::Node

    throws (super::ParseError)

{

    let mut arena = ast::nodeArena(&mut ARENA_STORAGE[..]);

    super::advance(&mut parser);

    let root = try super::parseType(&mut parser);

    try super::expect(&mut parser, scanner::TokenKind::Eof, "expected end of type");

    return root;

/// Parse a single expression from a string.

pub fn parseExprStr(input: *[u8]) -> *ast::Node

    throws (super::ParseError)

{

    let mut arena = ast::nodeArena(&mut ARENA_STORAGE[..]);

    super::advance(&mut parser);

    return try super::parseExpr(&mut parser);

}

/// Parse a single statement from a string.

fn parseStmtStr(input: *[u8]) -> *ast::Node

    throws (super::ParseError)

{

    let mut arena = ast::nodeArena(&mut ARENA_STORAGE[..]);

    super::advance(&mut parser);

    let root = try super::parseStmt(&mut parser);

    while super::consume(&mut parser, scanner::TokenKind::Semicolon) {}

    try super::expect(&mut parser, scanner::TokenKind::Eof, "expected end of statement");

/// Parse an expression expected to be a number literal and return its payload.

fn parseNumberLiteral(text: *[u8]) -> ast::IntLiteral

    throws (testing::TestError)

{

    let mut arena = ast::nodeArena(&mut ARENA_STORAGE[..]);

    super::advance(&mut parser);

    let node = try! super::parseExpr(&mut parser);

    if not super::check(&parser, scanner::TokenKind::Eof) {

/// Ensure that parsing the supplied literal source fails.

fn expectNumberLiteralFail(text: *[u8])

    throws (testing::TestError)

{

    let mut arena = ast::nodeArena(&mut ARENA_STORAGE[..]);

    super::advance(&mut parser);

    try super::parseExpr(&mut parser) catch {

        return;

    };

        // Find the module containing this error.

        if let moduleEntry = module::get(res.moduleGraph, err.moduleId) {

            // Get the source text if available.

            if let source = moduleEntry.source {

                // Convert offset to location.

                    // Print: filename:line:col: error: message

                    io::printU32(loc.line as u32);

                    io::print(":");

                    io::printU32(loc.col as u32);

                    io::print(": error: ");

                } else {

}

/// Parse and analyze an expression string for testing.

fn resolveExprStr(self: *mut super::Resolver, stmt: *[u8]) -> TestResult throws (testing::TestError) {

    let mut arena = ast::nodeArena(&mut AST_ARENA[..]);

    parser::advance(&mut p);

    let expr = try parser::parseExpr(&mut p) catch {

        panic "resolveExprStr: parsing failed";

    };

/// Parse and analyze a module string for testing.

/// Use this for code with `fn`, `record`, `union`, etc. at the top level.

fn resolveProgramStr(self: *mut super::Resolver, stmt: *[u8]) -> TestResult throws (testing::TestError) {

    let mut arena = ast::nodeArena(&mut AST_ARENA[..]);

        panic "resolveProgramStr: parsing failed";

    };

    let diagnostics = try super::resolveModuleRoot(self, stmt) catch {

        throw testing::TestError::Failed;

    };

/// Parse and analyze a block of statements (eg. inside a function body) for testing.

/// Use this for code with `let` bindings and expressions, not module-level declarations.

fn resolveBlockStr(self: *mut super::Resolver, stmt: *[u8]) -> TestResult throws (testing::TestError) {

    let mut arena = ast::nodeArena(&mut AST_ARENA[..]);

        panic "resolveBlockStr: parsing failed";

    };

    let case ast::NodeValue::Block(block) = parsed.value

        else panic "resolveBlockStr: expected block root";

    } else {

        modId = try module::registerRootWithName(graph, 0, name, filePath) catch {

            throw testing::TestError::Failed;

        };

    }

        panic "registerModule: parsing failed";

    };

    try module::setAst(graph, modId, root) catch {

        panic "registerModule: module not found";

    };

    { name: "use", tok: TokenKind::Use },

    { name: "void", tok: TokenKind::Void },

    { name: "while", tok: TokenKind::While },

];

/// Lexical scanner state for tokenizing Radiance source code.

///

/// Maintains position information and source buffer reference.

pub record Scanner {

    /// Source buffer.

    source: *[u8],

    /// Offset of current token into buffer.

    token: u32,

    /// Offset of current character being scanned.

    source: *[u8],

    /// Byte offset of `source` in input buffer.

    offset: u32,

}

///

/// Used for error reporting and debugging.

pub record Location {

    line: u16,

    /// Column number.

    col: u16,

}

/// Create a new scanner object.

    // Intern built-in functions and attributes.

    strings::intern(pool, "@sizeOf");

    strings::intern(pool, "@alignOf");

    strings::intern(pool, "@sliceOf");

    strings::intern(pool, "@default");

    strings::intern(pool, "@test");

    // Intern built-in slice methods.

    strings::intern(pool, "append");

    strings::intern(pool, "delete");

}

/// Check if we've reached the end of input.

pub fn isEof(s: *Scanner) -> bool {

    return s.cursor >= s.source.len;

        else => return invalid(s.token, "unexpected character"),

    }

}

/// Get the source code location from a byte offset.

    let mut l: u16 = 1;

    let mut c: u16 = 1;

    if offset >= source.len {

        return nil;

            l += 1;

        } else {

            c += 1;

        }

    }

}

/// String pool for testing.

static TEST_STRING_POOL: strings::Pool = strings::Pool { table: undefined, count: 0 };

fn testScanner(source: *[u8]) -> super::Scanner {

}

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

    let mut s = testScanner(

        "'x' < fnord fnord: 0 => >> mod and nil"

    );

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

    try testing::expect(tok.kind == super::TokenKind::Ident);

    try testing::expect(tok.source.len == 3);

        try testing::expect(loc.line == 1);

        try testing::expect(loc.col == 1);

    } else {

        try testing::expect(false);

    }

    tok = super::next(&mut s);

    try testing::expect(tok.kind == super::TokenKind::Ident);

    try testing::expect(tok.source.len == 3);

        try testing::expect(loc.line == 2);

        try testing::expect(loc.col == 3);

    } else {

        try testing::expect(false);

    }

    tok = super::next(&mut s);

    try testing::expect(tok.kind == super::TokenKind::Ident);

    try testing::expect(tok.source.len == 3);

        try testing::expect(loc.line == 3);

        try testing::expect(loc.col == 5);

    } else {

        try testing::expect(false);

    }

}

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

    let mut s = super::Scanner {

        source: "",

        token: 0,

        cursor: 0,

        pool: &mut TEST_STRING_POOL,

    };

use std::lang::alloc;

use std::lang::ast;

use std::lang::il;

use std::lang::il::printer;

use std::lang::parser;

use std::lang::module;

use std::lang::resolver;

use std::lang::strings;

use std::lang::lower;

        io::printLn(expectedPath);

        return false;

    };

    // Parse source.

    let mut astArena = ast::nodeArena(&mut astArenaStorage[..]);

        io::printLn("error: Parsing failed");

        return false;

    };

    // Run resolver.

    let mut moduleArena = ast::nodeArena(&mut moduleArenaStorage[..]);