forked from xxq250/Nasal-Interpreter
533 lines
14 KiB
C++
533 lines
14 KiB
C++
#ifndef __NASAL_CODEGEN_H__
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#define __NASAL_CODEGEN_H__
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enum op_code
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{
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op_nop,
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op_load,
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op_pushnum,op_pushone,op_pushzero,
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op_pushnil,
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op_pushstr,
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op_newvec,op_newhash,op_newfunc,
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op_vecappend,op_hashappend,
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op_para,op_defaultpara,op_dynamicpara,op_funcbegin,
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op_unot,op_usub,
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op_add,op_sub,op_mul,op_div,op_lnk,
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op_eq,op_neq,op_less,op_leq,op_grt,op_geq,
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op_pop,
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op_jmp,op_jmptrue,op_jmpfalse,
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op_gccall,op_gccallvec,op_gccallhash,op_gccallfunc,op_builtincall,
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op_slice,op_slice2,
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op_memcall,op_memcallvec,op_memcallhash,
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op_return,
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op_end
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};
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struct
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{
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int type;
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const char* name;
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}code_table[]=
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{
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{op_nop, "nop "},
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{op_load, "load "},
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{op_pushnum, "pnum "},
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{op_pushone, "pone "},
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{op_pushzero, "pzero "},
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{op_pushnil, "pnil "},
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{op_pushstr, "pstr "},
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{op_newvec, "newv "},
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{op_newhash, "newh "},
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{op_newfunc, "newf "},
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{op_vecappend, "vapp "},
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{op_hashappend, "happ "},
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{op_para, "para "},
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{op_defaultpara, "deflt "},
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{op_dynamicpara, "dyn "},
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{op_funcbegin, "fbegin"},
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{op_unot, "not "},
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{op_usub, "usub "},
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{op_add, "add "},
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{op_sub, "sub "},
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{op_mul, "mult "},
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{op_div, "div "},
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{op_lnk, "link "},
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{op_eq, "eq "},
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{op_neq, "neq "},
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{op_less, "l "},
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{op_leq, "leq "},
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{op_grt, "g "},
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{op_geq, "geq "},
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{op_pop, "pop "},
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{op_jmp, "jmp "},
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{op_jmptrue, "jt "},
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{op_jmpfalse, "jf "},
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{op_gccall, "calli "},
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{op_gccallvec, "callv "},
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{op_gccallhash, "callh "},
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{op_gccallfunc, "callf "},
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{op_builtincall, "callb "},
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{op_slice, "slice "},
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{op_slice2, "slice2"},
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{op_memcall, "mcalli"},
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{op_memcallvec, "mcallv"},
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{op_memcallhash, "mcallh"},
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{op_return, "ret "},
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{op_end, "end "},
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{-1, NULL},
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};
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struct opcode
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{
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unsigned char op;
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unsigned int index;
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opcode(){op=op_nop;index=0;}
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};
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// unfinished
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// now it can output ast but it is not byte code yet
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// please wait...
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class nasal_codegen
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{
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private:
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std::map<double,int> number_table;
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std::map<std::string,int> string_table;
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std::vector<opcode> exec_code;
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int error;
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void nil_gen();
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void number_gen(nasal_ast&);
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void string_gen(nasal_ast&);
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void vector_gen(nasal_ast&);
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void hash_gen(nasal_ast&);
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void function_gen(nasal_ast&);
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void call_gen(nasal_ast&);
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void call_id(nasal_ast&);
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void definition_gen(nasal_ast&);
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void multi_assignment_gen(nasal_ast&);
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void conditional_gen(nasal_ast&);
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void loop_gen(nasal_ast&);
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void calculation_gen(nasal_ast&);
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void block_gen(nasal_ast&);
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void return_gen(nasal_ast&);
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public:
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nasal_codegen();
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void main_progress(nasal_ast&);
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void print_byte_code();
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};
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nasal_codegen::nasal_codegen()
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{
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error=0;
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number_table.clear();
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string_table.clear();
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return;
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}
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void nasal_codegen::nil_gen()
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{
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opcode op;
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op.op=op_pushnil;
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::number_gen(nasal_ast& ast)
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{
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int size=number_table.size();
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double num=ast.get_num();
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opcode op;
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if(number_table.find(num)==number_table.end())
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number_table[num]=size;
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if(num==1)
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op.op=op_pushone;
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else if(num==0)
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op.op=op_pushzero;
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else
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{
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op.op=op_pushnum;
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op.index=number_table[num];
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}
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::string_gen(nasal_ast& ast)
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{
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int size=string_table.size();
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std::string str=ast.get_str();
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opcode op;
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if(string_table.find(str)==string_table.end())
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string_table[str]=size;
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op.op=op_pushstr;
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op.index=string_table[str];
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::vector_gen(nasal_ast& ast)
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{
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int size=ast.get_children().size();
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opcode op;
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op.op=op_newvec;
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op.index=0;
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exec_code.push_back(op);
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for(int i=0;i<size;++i)
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{
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calculation_gen(ast.get_children()[i]);
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opcode tmp;
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tmp.op=op_vecappend;
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tmp.index=0;
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exec_code.push_back(tmp);
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}
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return;
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}
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void nasal_codegen::hash_gen(nasal_ast& ast)
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{
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int size=ast.get_children().size();
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opcode op;
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op.op=op_newhash;
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op.index=0;
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exec_code.push_back(op);
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for(int i=0;i<size;++i)
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{
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string_gen(ast.get_children()[i].get_children()[0]);
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calculation_gen(ast.get_children()[i].get_children()[1]);
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op.op=op_hashappend;
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op.index=0;
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exec_code.push_back(op);
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}
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return;
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}
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void nasal_codegen::function_gen(nasal_ast& ast)
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{
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opcode op;
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op.op=op_newfunc;
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op.index=0;
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exec_code.push_back(op);
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nasal_ast& ref_arg=ast.get_children()[0];
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int arg_size=ref_arg.get_children().size();
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for(int i=0;i<arg_size;++i)
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{
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nasal_ast& tmp=ref_arg.get_children()[i];
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if(tmp.get_type()==ast_identifier)
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{
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int size=string_table.size();
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std::string str=tmp.get_str();
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if(string_table.find(str)==string_table.end())
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string_table[str]=size;
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opcode tmp;
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tmp.op=op_para;
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tmp.index=string_table[str];
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exec_code.push_back(tmp);
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}
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else if(tmp.get_type()==ast_default_arg)
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{
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calculation_gen(tmp.get_children()[1]);
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int size=string_table.size();
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std::string str=tmp.get_children()[0].get_str();
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if(string_table.find(str)==string_table.end())
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string_table[str]=size;
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opcode tmp;
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tmp.op=op_defaultpara;
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tmp.index=string_table[str];
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exec_code.push_back(tmp);
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}
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else if(tmp.get_type()==ast_dynamic_id)
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{
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int size=string_table.size();
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std::string str=tmp.get_str();
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if(string_table.find(str)==string_table.end())
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string_table[str]=size;
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opcode tmp;
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tmp.op=op_dynamicpara;
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tmp.index=string_table[str];
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exec_code.push_back(tmp);
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}
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}
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op.op=op_funcbegin;
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op.index=0;
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exec_code.push_back(op);
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nasal_ast& block=ast.get_children()[1];
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block_gen(block);
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if(!block.get_children().size() || block.get_children().back().get_type()!=ast_return)
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{
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opcode tmp;
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tmp.op=op_return;
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tmp.index=0;
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exec_code.push_back(tmp);
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}
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return;
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}
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void nasal_codegen::call_gen(nasal_ast& ast)
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{
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if(ast.get_children()[0].get_type()==ast_identifier)
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{
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int size=string_table.size();
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std::string str=ast.get_children()[0].get_str();
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if(string_table.find(str)==string_table.end())
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string_table[str]=size;
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opcode op;
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op.op=op_gccall;
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op.index=string_table[str];
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exec_code.push_back(op);
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}
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else
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calculation_gen(ast.get_children()[0]);
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int child_size=ast.get_children().size();
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for(int i=0;i<child_size;++i)
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{
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nasal_ast& tmp=ast.get_children()[i];
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if(tmp.get_type()==ast_call_hash)
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{
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opcode op;
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op.op=op_gccallhash;
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int size=string_table.size();
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std::string str=tmp.get_str();
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if(string_table.find(str)==string_table.end())
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string_table[str]=size;
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op.index=string_table[str];
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exec_code.push_back(op);
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}
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;// unfinished
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}
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return;
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}
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void nasal_codegen::call_id(nasal_ast& ast)
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{
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int size=string_table.size();
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std::string str=ast.get_str();
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if(string_table.find(str)==string_table.end())
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string_table[str]=size;
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opcode op;
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op.op=op_gccall;
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op.index=string_table[str];
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::definition_gen(nasal_ast& ast)
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{
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if(ast.get_children()[0].get_type()==ast_identifier)
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{
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calculation_gen(ast.get_children()[1]);
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int size=string_table.size();
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std::string str=ast.get_children()[0].get_str();
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if(string_table.find(str)==string_table.end())
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string_table[str]=size;
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opcode op;
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op.op=op_load;
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op.index=string_table[str];
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exec_code.push_back(op);
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}
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return;
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}
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void nasal_codegen::multi_assignment_gen(nasal_ast& ast)
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{
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return;
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}
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void nasal_codegen::conditional_gen(nasal_ast& ast)
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{
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return;
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}
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void nasal_codegen::loop_gen(nasal_ast& ast)
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{
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return;
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}
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void nasal_codegen::calculation_gen(nasal_ast& ast)
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{
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opcode op;
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op.index=0;
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switch(ast.get_type())
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{
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case ast_nil:nil_gen();break;
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case ast_number:number_gen(ast);break;
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case ast_string:string_gen(ast);break;
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case ast_identifier:call_id(ast);break;
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case ast_vector:vector_gen(ast);break;
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case ast_hash:hash_gen(ast);break;
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case ast_function:function_gen(ast);break;
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case ast_call:call_gen(ast);break;
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case ast_equal:
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case ast_add_equal:
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case ast_sub_equal:
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case ast_mult_equal:
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case ast_div_equal:
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case ast_link_equal:break;
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case ast_add:
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op.op=op_add;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_sub:
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op.op=op_sub;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_mult:
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op.op=op_mul;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_div:
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op.op=op_div;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_link:
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op.op=op_lnk;
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calculation_gen(ast.get_children()[0]);
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calculation_gen(ast.get_children()[1]);
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exec_code.push_back(op);
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break;
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case ast_trinocular:break;
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case ast_unary_sub:
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op.op=op_usub;
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calculation_gen(ast.get_children()[0]);
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exec_code.push_back(op);
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break;
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case ast_unary_not:
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op.op=op_unot;
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calculation_gen(ast.get_children()[0]);
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exec_code.push_back(op);
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break;
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}
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return;
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}
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void nasal_codegen::block_gen(nasal_ast& ast)
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{
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int size=ast.get_children().size();
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for(int i=0;i<size;++i)
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{
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nasal_ast& tmp=ast.get_children()[i];
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switch(tmp.get_type())
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{
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case ast_null:
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case ast_nil:
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case ast_number:
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case ast_string:
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case ast_function:break;
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case ast_definition:definition_gen(tmp);break;
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case ast_multi_assign:multi_assignment_gen(tmp);break;
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case ast_conditional:conditional_gen(tmp);break;
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case ast_while:
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case ast_for:
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case ast_forindex:
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case ast_foreach:loop_gen(tmp);break;
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case ast_identifier:
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case ast_vector:
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case ast_hash:
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case ast_call:
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case ast_equal:
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case ast_add_equal:
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case ast_sub_equal:
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case ast_mult_equal:
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case ast_div_equal:
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case ast_link_equal:
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case ast_unary_sub:
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case ast_unary_not:
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case ast_add:
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case ast_sub:
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case ast_mult:
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case ast_div:
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case ast_link:
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case ast_trinocular:calculation_gen(tmp);break;
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case ast_break:break;
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case ast_continue:break;
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case ast_return:return_gen(tmp);break;
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}
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}
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return;
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}
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void nasal_codegen::return_gen(nasal_ast& ast)
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{
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if(ast.get_children().size())
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calculation_gen(ast.get_children()[0]);
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opcode op;
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op.op=op_return;
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exec_code.push_back(op);
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return;
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}
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void nasal_codegen::main_progress(nasal_ast& ast)
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{
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error=0;
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number_table.clear();
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string_table.clear();
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exec_code.clear();
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int size=ast.get_children().size();
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for(int i=0;i<size;++i)
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{
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nasal_ast& tmp=ast.get_children()[i];
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switch(tmp.get_type())
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{
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case ast_null:
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case ast_nil:
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case ast_number:
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case ast_string:
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case ast_function:break;
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case ast_definition:definition_gen(tmp);break;
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case ast_multi_assign:multi_assignment_gen(tmp);break;
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case ast_conditional:conditional_gen(tmp);break;
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case ast_while:
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case ast_for:
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case ast_forindex:
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case ast_foreach:loop_gen(tmp);break;
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case ast_identifier:
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case ast_vector:
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case ast_hash:
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case ast_call:
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case ast_equal:
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case ast_add_equal:
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case ast_sub_equal:
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case ast_mult_equal:
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case ast_div_equal:
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case ast_link_equal:
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case ast_unary_sub:
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case ast_unary_not:
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case ast_add:
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case ast_sub:
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case ast_mult:
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case ast_div:
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case ast_link:
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case ast_trinocular:calculation_gen(tmp);break;
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}
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}
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return;
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}
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void nasal_codegen::print_byte_code()
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{
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int size=exec_code.size();
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for(int i=0;i<size;++i)
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{
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int type=exec_code[i].op;
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for(int j=0;code_table[j].name;++j)
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if(code_table[j].type==type)
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{
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std::cout<<code_table[j].name<<' ';
|
|
break;
|
|
}
|
|
std::cout<<exec_code[i].index<<'\n';
|
|
}
|
|
return;
|
|
}
|
|
|
|
#endif |