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Markup language that is simple to read, to write and to parse.
zig parser html language markup typst
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374const std = @import("std");const Allocator = std.mem.Allocator;const Token = @import("lexer/Token.zig");const Lexer = @import("lexer/Lexer.zig");const Element = @import("eval/Element.zig");const Paragraph = Element.paragraph;const parser = @import("parser.zig");const link = @import("link.zig");const content = @import("content.zig");const testing = @import("testing.zig");const doTest = testing.do;const doTestMath = testing.doMath;const doTestError = testing.doError;
pub const Error = content.Error || link.Error || Allocator.Error;
pub fn parse(alloc: Allocator, l: *Lexer) Error!Element { var el = try Paragraph.Block.init(alloc); var root = try Element.Root.init(alloc); el.content = root.element(); root.append(try parseLine(root.allocator(), l)); while (l.peek()) |next| switch (next.kind) { .strong_delimiter => return el.element(), .weak_delimiter => { l.consume(); l.isValid(); const future = l.peek() orelse return el.element(); if (!future.kind.isInParagraph()) return el.element(); root.append(try Element.Literal.init(root.allocator(), " ")); root.append(try parseLine(root.allocator(), l)); }, else => unreachable, }; if (root.content.first == null) { el.content = null; root.deinit(); } return el.element();}
pub fn parseLine(alloc: Allocator, l: *Lexer) Error!?Element { var line = try Element.Root.init(alloc); defer if (line.content.first == null) line.deinit(); while (l.peek()) |next| switch (next.kind) { .weak_delimiter, .strong_delimiter => { if (line.content.first == null) return null; return line.element(); }, .link => line.append(try link.parse(line.allocator(), l)), else => line.append(try content.parse(line.allocator(), l)), }; if (line.content.first == null) return null; return line.element();}
test "parse paragraphs" { const alloc = std.testing.allocator;
try doTest(parse, alloc, "hello world", "<p>hello world</p>"); try doTest(parse, alloc, "*hello* world", "<p><b>hello</b> world</p>"); try doTest(parse, alloc, "*he_ll_o* world", "<p><b>he<em>ll</em>o</b> world</p>"); try doTest(parse, alloc, "(foo)", "<p>(foo)</p>"); try doTest(parse, alloc, "[](bar)", "<p><a href=\"bar\">bar</a></p>"); try doTest(parse, alloc, "[foo](bar)", "<p><a href=\"bar\">foo</a></p>"); try doTest(parse, alloc, "hello [foo](bar) world", "<p>hello <a href=\"bar\">foo</a> world</p>"); try doTestMath(parse, alloc, "$x$", "<p>" ++ @embedFile("data/content_1.svg") ++ "</p>"); try doTestMath(parse, alloc, "$x^2$", "<p>" ++ @embedFile("data/content_2.svg") ++ "</p>");
try doTestError(parse, alloc, "hello *world", Error.ModifierNotClosed); try doTestError(parse, alloc, "hello *wo_rld*", Error.ModifierNotClosed); try doTestError(parse, alloc, "*hell*o *wo_rld*", Error.ModifierNotClosed); try doTestError(parse, alloc, "hello wo$rld", Error.ModifierNotClosed);}