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[Tolk] Implement AST: intermediate representation of tolk files

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Now, the whole .tolk file can be loaded as AST tree and
then converted to Expr/Op.
This gives a great ability to implement AST transformations.
In the future, more and more code analysis will be moved out of legacy to AST-level.
This commit is contained in:
tolk-vm 2024-10-31 11:03:33 +04:00
parent 6c30e5a7eb
commit 80001d1756
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GPG key ID: 7905DD7FE0324B12
23 changed files with 3798 additions and 2233 deletions
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18
tolk/symtable.h
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@ -36,18 +36,11 @@ struct SymValBase {
};
enum class SymbolSubclass {
undef = 0,
dot_identifier = 1, // begins with . (a const method)
tilde_identifier = 2 // begins with ~ (a non-const method)
};
struct Symbol {
std::string str;
sym_idx_t idx;
SymbolSubclass subclass;
Symbol(std::string str, sym_idx_t idx);
Symbol(std::string str, sym_idx_t idx) : str(std::move(str)), idx(idx) {}
static std::string unknown_symbol_name(sym_idx_t i);
};
@ -64,10 +57,10 @@ private:
public:
static constexpr sym_idx_t not_found = 0;
sym_idx_t lookup(const std::string_view& str, int mode = 0) {
sym_idx_t lookup(std::string_view str, int mode = 0) {
return gen_lookup(str, mode);
}
sym_idx_t lookup_add(const std::string& str) {
sym_idx_t lookup_add(std::string_view str) {
return gen_lookup(str, 1);
}
Symbol* operator[](sym_idx_t i) const {
@ -76,9 +69,6 @@ public:
std::string get_name(sym_idx_t i) const {
return sym[i] ? sym[i]->str : Symbol::unknown_symbol_name(i);
}
SymbolSubclass get_subclass(sym_idx_t i) const {
return sym[i] ? sym[i]->subclass : SymbolSubclass::undef;
}
};
struct SymTableOverflow {
@ -104,7 +94,7 @@ struct SymDef {
void open_scope(SrcLocation loc);
void close_scope(SrcLocation loc);
void close_scope();
SymDef* lookup_symbol(sym_idx_t idx);
SymDef* define_global_symbol(sym_idx_t name_idx, bool force_new = false, SrcLocation loc = {});