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// This file defines how to compile blocks
#include "../ast.h"
#include "../environment.h"
#include "../stdlib/datatypes.h"
#include "../stdlib/text.h"
#include "../util.h"
#include "../typecheck.h"
#include "compilation.h"
public
Text_t compile_block(env_t *env, ast_t *ast) { return Texts("{\n", compile_inline_block(env, ast), "}\n"); }
Text_t compile_block_expression(env_t *env, ast_t *ast) {
ast_list_t *stmts = Match(ast, Block)->statements;
if (stmts && !stmts->next) return compile(env, stmts->ast);
Text_t code = Text("({\n");
deferral_t *prev_deferred = env->deferred;
env = fresh_scope(env);
for (ast_list_t *stmt = stmts; stmt; stmt = stmt->next)
prebind_statement(env, stmt->ast);
for (ast_list_t *stmt = stmts; stmt; stmt = stmt->next) {
if (stmt->next) {
code = Texts(code, compile_statement(env, stmt->ast), "\n");
} else {
// TODO: put defer after evaluating block expression
for (deferral_t *deferred = env->deferred; deferred && deferred != prev_deferred;
deferred = deferred->next) {
code = Texts(code, compile_statement(deferred->defer_env, deferred->block));
}
code = Texts(code, compile(env, stmt->ast), ";\n");
}
bind_statement(env, stmt->ast);
}
return Texts(code, "})");
}
public
Text_t compile_inline_block(env_t *env, ast_t *ast) {
if (ast->tag != Block) return compile_statement(env, ast);
Text_t code = EMPTY_TEXT;
ast_list_t *stmts = Match(ast, Block)->statements;
deferral_t *prev_deferred = env->deferred;
env = fresh_scope(env);
for (ast_list_t *stmt = stmts; stmt; stmt = stmt->next)
prebind_statement(env, stmt->ast);
for (ast_list_t *stmt = stmts; stmt; stmt = stmt->next) {
code = Texts(code, compile_statement(env, stmt->ast), "\n");
bind_statement(env, stmt->ast);
}
for (deferral_t *deferred = env->deferred; deferred && deferred != prev_deferred; deferred = deferred->next) {
code = Texts(code, compile_statement(deferred->defer_env, deferred->block));
}
return code;
}
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