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const std = @import("std");
const logger = @import("logger.zig");
const js_lexer = @import("js_lexer.zig");
const importRecord = @import("import_record.zig");
const js_ast = @import("js_ast.zig");
const options = @import("options.zig");
const alloc = @import("alloc.zig");
const fs = @import("fs.zig");
usingnamespace @import("strings.zig");
usingnamespace @import("ast/base.zig");
usingnamespace js_ast.G;
const ImportKind = importRecord.ImportKind;
const BindingNodeIndex = js_ast.BindingNodeIndex;
const StmtNodeIndex = js_ast.StmtNodeIndex;
const ExprNodeIndex = js_ast.ExprNodeIndex;
const ExprNodeList = js_ast.ExprNodeList;
const StmtNodeList = js_ast.StmtNodeList;
const BindingNodeList = js_ast.BindingNodeList;
const assert = std.debug.assert;
const Ref = js_ast.Ref;
const LocRef = js_ast.LocRef;
const S = js_ast.S;
const B = js_ast.B;
const G = js_ast.G;
const T = js_lexer.T;
const E = js_ast.E;
const Stmt = js_ast.Stmt;
const Expr = js_ast.Expr;
const Binding = js_ast.Binding;
const Symbol = js_ast.Symbol;
const Level = js_ast.Op.Level;
const Op = js_ast.Op;
const Scope = js_ast.Scope;
const locModuleScope = logger.Loc.Empty;
fn JSONLikeParser(opts: js_lexer.JSONOptions) type {
const Lexer = if (opts.allow_comments) js_lexer.TSConfigJSONLexer else js_lexer.JSONLexer;
return struct {
lexer: Lexer,
source: logger.Source,
log: logger.Log,
allocator: *std.mem.Allocator,
pub fn init(allocator: *std.mem.Allocator, source: logger.Source, log: logger.Log) Parser {
return Parser{
.lexer = Lexer.init(log, source, allocator),
.allocator = allocator,
.log = log,
.source = source,
};
}
const Parser = @This();
pub fn e(p: *Parser, t: anytype, loc: logger.Loc) Expr {
if (@typeInfo(@TypeOf(t)) == .Pointer) {
return Expr.init(t, loc);
} else {
return Expr.alloc(p.allocator, t, loc);
}
}
pub fn parseExpr(p: *Parser) ?Expr {
const loc = p.lexer.loc();
switch (p.lexer.token) {
.t_false => {
p.lexer.next();
return p.e(E.Boolean{
.value = false,
}, loc);
},
.t_true => {
p.lexer.next();
return p.e(E.Boolean{
.value = true,
}, loc);
},
.t_null => {
p.lexer.next();
return p.e(E.Null{}, loc);
},
.t_string_literal => {
const value = p.lexer.string_literal;
p.lexer.next();
return p.e(E.String{
.value = value,
}, loc);
},
.t_numeric_literal => {
const value = p.lexer.number;
p.lexer.next();
return p.e(E.Number{ .value = value }, loc);
},
.t_minus => {
p.lexer.next();
const value = p.lexer.number;
p.lexer.expect(.t_numeric_literal);
return p.e(E.Number{ .value = -value }, loc);
},
.t_open_bracket => {
p.lexer.next();
var is_single_line = !p.lexer.has_newline_before;
var exprs = List(Expr).init(p.allocator);
while (p.lexer.token != .t_close_bracket) {
if (exprs.items.len > 0) {
if (p.lexer.has_newline_before) {
is_single_line = false;
}
if (!p.parseMaybeTrailingComma(.t_close_bracket)) {
break;
}
if (p.lexer.has_newline_before) {
is_single_line = false;
}
}
if (p.parseExpr()) |expr| {
try exprs.append(expr);
} else {
break;
}
}
if (p.lexer.has_newline_before) {
is_single_line = false;
}
p.lexer.expect(.t_close_bracket);
return p.e(E.Array{ .items = exprs.toOwnedSlice() }, loc);
},
.t_open_brace => {
p.lexer.next();
var is_single_line = !p.lexer.has_newline_before;
var properties = List(G.Property).init(p.allocator);
var duplicates = std.StringHashMap(u0).init(p.allocator);
while (p.lexer.token != .t_close_brace) {
if (properties.items.len > 0) {
is_single_line = if (p.lexer.has_newline_before) false else is_single_line;
if (!p.parseMaybeTrailingComma(.t_close_brace)) {
break;
}
is_single_line = if (p.lexer.has_newline_before) false else is_single_line;
}
var key_string = p.lexer.string_literal;
var key_range = p.lexer.range();
var key = p.e(E.String{ .value = key_string }, key_range.loc);
p.lexer.expect(.t_string_literal);
var key_text = p.lexer.utf16ToString();
// Warn about duplicate keys
if (duplicates.contains(key_text)) {
p.log.addRangeWarningFmt(p.source, r, "Duplicate key \"{s}\" in object literal", .{key_text}) catch unreachable;
} else {
duplicates.put(key_text, 0) catch unreachable;
}
p.lexer.expect(.t_colon);
var value = p.parseExpr() orelse return null;
try properties.append(G.Property{ .key = key, .value = value });
}
is_single_line = if (p.lexer.has_newline_before) false else is_single_line;
p.lexer.expect(.t_close_brace);
return p.e(E.Object{
.properties = properties.toOwnedSlice(),
.is_single_line = is_single_line,
}, loc);
},
else => {
p.lexer.unexpected();
return null;
},
}
}
pub fn parseMaybeTrailingComma(p: *Parser, closer: T) bool {
const comma_range = p.lexer.range();
p.lexer.expect(.t_comma);
if (p.lexer.token == closer) {
if (!opts.allow_trailing_commas) {
p.log.addRangeError(p.source, comma_range, "JSON does not support trailing commas") catch unreachable;
}
return false;
}
return true;
}
};
}
const JSONParser = JSONLikeParser(js_lexer.JSONOptions{});
const TSConfigParser = JSONLikeParser(js_lexer.JSONOptions{ .allow_comments = true, .allow_trailing_commas = true });
pub fn ParseJSON(log: logger.Log, source: logger.Source) !?Expr {
var parser = JSONParser.init(allocator, log, source);
return try parser.parseExpr();
}
pub fn ParseTSConfig(log: logger.Loc, source: logger.Source) !?Expr {
var parser = TSConfigParser.init(allocator, log, source);
return try parser.parseExpr();
}
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