6fd6fdea93
src/comp/syntax is currently just a sub-module of rustc, but it will, in the near future, be its own crate. This includes: - The AST data structure - The parser - The pretty-printer - Visit, walk, and fold - The syntax extension system - Some utility stuff that should be in the stdlib* *) Stdlib extensions currently require a snapshot before they can be used, and the win build is very broken right now. This is temporary and will be cleaned up when one of those problems goes away. A lot of code was moved by this patch, mostly towards a more organized layout. Some package paths did get longer, and I guess the new layout will take some getting used to. Sorry about that! Please try not to re-introduce any dependencies in syntax/ on any of the other src/comp/ subdirs.
97 lines
2.7 KiB
Rust
97 lines
2.7 KiB
Rust
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import std::vec;
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import std::term;
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import std::io;
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import std::option;
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import std::option::some;
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import std::option::none;
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type filename = str;
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/* A codemap is a thing that maps uints to file/line/column positions
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* in a crate. This to make it possible to represent the positions
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* with single-word things, rather than passing records all over the
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* compiler.
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*/
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type filemap = @rec(filename name, uint start_pos, mutable vec[uint] lines);
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type codemap = @rec(mutable vec[filemap] files);
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type loc = rec(filename filename, uint line, uint col);
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fn new_codemap() -> codemap {
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let vec[filemap] files = [];
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ret @rec(mutable files=files);
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}
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fn new_filemap(filename filename, uint start_pos) -> filemap {
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ret @rec(name=filename, start_pos=start_pos, mutable lines=[0u]);
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}
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fn next_line(filemap file, uint pos) { vec::push[uint](file.lines, pos); }
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fn lookup_pos(codemap map, uint pos) -> loc {
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auto a = 0u;
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auto b = vec::len[filemap](map.files);
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while (b - a > 1u) {
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auto m = (a + b) / 2u;
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if (map.files.(m).start_pos > pos) { b = m; } else { a = m; }
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}
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auto f = map.files.(a);
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a = 0u;
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b = vec::len[uint](f.lines);
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while (b - a > 1u) {
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auto m = (a + b) / 2u;
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if (f.lines.(m) > pos) { b = m; } else { a = m; }
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}
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ret rec(filename=f.name, line=a + 1u, col=pos - f.lines.(a));
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}
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type span = rec(uint lo, uint hi);
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fn span_to_str(&span sp, &codemap cm) -> str {
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auto lo = lookup_pos(cm, sp.lo);
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auto hi = lookup_pos(cm, sp.hi);
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ret #fmt("%s:%u:%u:%u:%u", lo.filename, lo.line, lo.col, hi.line, hi.col);
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}
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fn emit_diagnostic(&option::t[span] sp, &str msg, &str kind, u8 color,
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&codemap cm) {
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auto ss = "<input>:0:0:0:0";
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alt (sp) {
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case (some(?ssp)) { ss = span_to_str(ssp, cm); }
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case (none) { }
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}
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io::stdout().write_str(ss + ": ");
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if (term::color_supported()) {
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term::fg(io::stdout().get_buf_writer(), color);
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}
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io::stdout().write_str(#fmt("%s:", kind));
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if (term::color_supported()) {
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term::reset(io::stdout().get_buf_writer());
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}
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io::stdout().write_str(#fmt(" %s\n", msg));
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}
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fn emit_warning(&option::t[span] sp, &str msg, &codemap cm) {
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emit_diagnostic(sp, msg, "warning", 11u8, cm);
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}
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fn emit_error(&option::t[span] sp, &str msg, &codemap cm) {
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emit_diagnostic(sp, msg, "error", 9u8, cm);
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}
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fn emit_note(&option::t[span] sp, &str msg, &codemap cm) {
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emit_diagnostic(sp, msg, "note", 10u8, cm);
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}
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//
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// Local Variables:
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// mode: rust
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// fill-column: 78;
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// indent-tabs-mode: nil
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// c-basic-offset: 4
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// buffer-file-coding-system: utf-8-unix
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// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
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// End:
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//
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