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[Tolk] Compilation pipeline, register global symbols in advance

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Since I've implemented AST, now I can drop forward declarations.
Instead, I traverse AST of all files and register global symbols
(functions, constants, global vars) as a separate step, in advance.

That's why, while converting AST to Expr/Op, all available symbols are
already registered.
This greatly simplifies "intermediate state" of yet unknown functions
and checking them afterward.

Redeclaration of local variables (inside the same scope)
is now also prohibited.
This commit is contained in:
tolk-vm 2024-10-31 11:04:58 +04:00
parent 80001d1756
commit 5a3e3595d6
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28 changed files with 1266 additions and 1134 deletions
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5
tolk/compiler-state.h
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@ -74,12 +74,9 @@ struct CompilerState {
std::vector<std::pair<int, SymDef>> symbol_stack;
std::vector<SrcLocation> scope_opened_at;
std::vector<SymDef*> all_code_functions, all_global_vars, all_get_methods, all_constants;
AllRegisteredSrcFiles all_src_files;
int glob_func_cnt = 0, glob_var_cnt = 0, const_cnt = 0;
std::vector<SymDef*> glob_func, glob_vars, glob_get_methods;
std::set<std::string> prohibited_var_names;
std::string generated_from;
GlobalPragma pragma_allow_post_modification{"allow-post-modification"};
GlobalPragma pragma_compute_asm_ltr{"compute-asm-ltr"};