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Break out PrintVisitor into separate file.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| // bant - Bazel Navigation Tool | ||
| // Copyright (C) 2024 Henner Zeller <[email protected]> | ||
| // | ||
| // This program is free software; you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation; either version 2 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License along | ||
| // with this program; if not, write to the Free Software Foundation, Inc., | ||
| // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
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| #include "bant/frontend/print-visitor.h" | ||
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| #include <ostream> | ||
| #include <string> | ||
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| #include "bant/frontend/ast.h" | ||
| #include "bant/frontend/scanner.h" | ||
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| namespace bant { | ||
| void PrintVisitor::VisitFunCall(FunCall *f) { | ||
| out_ << f->identifier()->id(); | ||
| BaseVoidVisitor::VisitFunCall(f); | ||
| } | ||
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| static void PrintListTypeOpen(List::Type t, std::ostream &out) { | ||
| switch (t) { | ||
| case List::Type::kList: out << "["; break; | ||
| case List::Type::kMap: out << "{"; break; | ||
| case List::Type::kTuple: out << "("; break; | ||
| } | ||
| } | ||
| static void PrintListTypeClose(List::Type t, std::ostream &out) { | ||
| switch (t) { | ||
| case List::Type::kList: out << "]"; break; | ||
| case List::Type::kMap: out << "}"; break; | ||
| case List::Type::kTuple: out << ")"; break; | ||
| } | ||
| } | ||
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| void PrintVisitor::VisitList(List *l) { | ||
| static constexpr int kIndentSpaces = 4; | ||
| PrintListTypeOpen(l->type(), out_); | ||
| const bool needs_multiline = (l->size() > 1); | ||
| if (needs_multiline) out_ << "\n"; | ||
| indent_ += kIndentSpaces; | ||
| bool is_first = true; | ||
| for (Node *node : *l) { | ||
| if (!is_first) out_ << ",\n"; | ||
| if (needs_multiline) out_ << std::string(indent_, ' '); | ||
| if (!WalkNonNull(node)) { | ||
| out_ << "NIL"; | ||
| } | ||
| is_first = false; | ||
| } | ||
| // If a tuple only contains one element, then we need a final ',' | ||
| // to disambiguate from a parenthesized expression. | ||
| if (l->type() == List::Type::kTuple && l->size() == 1) { | ||
| out_ << ","; | ||
| } | ||
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| indent_ -= kIndentSpaces; | ||
| if (needs_multiline) { | ||
| out_ << "\n" << std::string(indent_, ' '); | ||
| } | ||
| PrintListTypeClose(l->type(), out_); | ||
| } | ||
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| void PrintVisitor::VisitUnaryExpr(UnaryExpr *e) { | ||
| out_ << e->op(); | ||
| if (e->op() == TokenType::kNot) out_ << " "; | ||
| WalkNonNull(e->node()); | ||
| } | ||
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| void PrintVisitor::VisitBinOpNode(BinOpNode *b) { | ||
| WalkNonNull(b->left()); | ||
| if (b->op() == '.' || b->op() == '[') { | ||
| out_ << b->op(); // No spacing around some operators. | ||
| } else { | ||
| out_ << " " << b->op() << " "; | ||
| } | ||
| WalkNonNull(b->right()); | ||
| if (b->op() == '[') { // Array access is a BinOp with '[' as op. | ||
| out_ << "]"; | ||
| } | ||
| } | ||
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| void PrintVisitor::VisitListComprehension(ListComprehension *lh) { | ||
| PrintListTypeOpen(lh->type(), out_); | ||
| WalkNonNull(lh->for_node()); | ||
| PrintListTypeClose(lh->type(), out_); | ||
| } | ||
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| void PrintVisitor::VisitTernary(Ternary *t) { | ||
| WalkNonNull(t->positive()); | ||
| out_ << " if "; | ||
| WalkNonNull(t->condition()); | ||
| if (t->negative()) { | ||
| out_ << " else "; | ||
| t->negative()->Accept(this); | ||
| } | ||
| } | ||
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| void PrintVisitor::VisitScalar(Scalar *s) { | ||
| if (s->type() == Scalar::ScalarType::kInt) { | ||
| if (s->AsString().empty()) { | ||
| out_ << s->AsInt(); | ||
| } else { | ||
| out_ << s->AsString(); // Keep original representation intact if avail. | ||
| } | ||
| } else { | ||
| const StringScalar *str = static_cast<StringScalar *>(s); | ||
| if (str->is_raw()) out_ << "r"; | ||
| // Minimal-effort quote char choosing. TODO: look if escaped | ||
| const bool has_any_double_quote = | ||
| str->AsString().find_first_of('"') != std::string_view::npos; | ||
| const char quote_char = has_any_double_quote ? '\'' : '"'; | ||
| if (str->is_triple_quoted()) out_ << quote_char << quote_char; | ||
| out_ << quote_char << str->AsString() << quote_char; | ||
| if (str->is_triple_quoted()) out_ << quote_char << quote_char; | ||
| } | ||
| } | ||
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| void PrintVisitor::VisitIdentifier(Identifier *i) { out_ << i->id(); } | ||
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| std::ostream &operator<<(std::ostream &o, Node *n) { | ||
| if (!PrintVisitor(o).WalkNonNull(n)) { | ||
| o << "NIL"; | ||
| } | ||
| return o; | ||
| } | ||
| } // namespace bant |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| // bant - Bazel Navigation Tool | ||
| // Copyright (C) 2024 Henner Zeller <[email protected]> | ||
| // | ||
| // This program is free software; you can redistribute it and/or modify | ||
| // it under the terms of the GNU General Public License as published by | ||
| // the Free Software Foundation; either version 2 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU General Public License along | ||
| // with this program; if not, write to the Free Software Foundation, Inc., | ||
| // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
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| #ifndef BANT_PRINT_VISITOR_H | ||
| #define BANT_PRINT_VISITOR_H | ||
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| #include <ostream> | ||
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| #include "bant/frontend/ast.h" | ||
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| namespace bant { | ||
| class PrintVisitor : public BaseVoidVisitor { | ||
| public: | ||
| explicit PrintVisitor(std::ostream &out) : out_(out) {} | ||
| // Using default impl. for Assignment. | ||
| void VisitFunCall(FunCall *f) final; | ||
| void VisitList(List *l) final; | ||
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| void VisitUnaryExpr(UnaryExpr *e) final; | ||
| void VisitBinOpNode(BinOpNode *b) final; | ||
| void VisitListComprehension(ListComprehension *lh) final; | ||
| void VisitTernary(Ternary *t) final; | ||
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| void VisitScalar(Scalar *s) final; | ||
| void VisitIdentifier(Identifier *i) final; | ||
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| private: | ||
| int indent_ = 0; | ||
| std::ostream &out_; | ||
| }; | ||
| } // namespace bant | ||
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| #endif // BANT_PRINT_VISITOR_H |