X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?a=blobdiff_plain;f=src%2Flib_1_basic.4th;h=a5bb701d44396297c729c2e234546038dc6d7fea;hb=c52194127d604bd365f7222936b46f34f62a4814;hp=176472312f2bca7a80641eda60447b92e6c9ec8a;hpb=9da6dc7c0252fdc18aca602928feab518737cc8f;p=forth.jl.git diff --git a/src/lib_1_basic.4th b/src/lib_1_basic.4th index 1764723..a5bb701 100644 --- a/src/lib_1_basic.4th +++ b/src/lib_1_basic.4th @@ -36,14 +36,27 @@ : C@ @ ; : C, , ; +\ Retrieve stack depth : DEPTH PSP@ PSP0 - ; +\ Words for whitespace : '\n' 10 ; : BL 32 ; +: CR '\n' emit ; +: SPACE BL emit ; -: LITERAL IMMEDIATE ['] LIT , , ; - +\ CFA retrieval : ' BL WORD FIND DROP ; +: ['] IMMEDIATE + LIT LIT , ' , ; + +\ Compilation + +: [COMPILE] IMMEDIATE ' , ; +: COMPILE IMMEDIATE + LIT LIT , ' , LIT , , ; + +: LITERAL IMMEDIATE ['] LIT , , ; : CHAR BL WORD 1+ @ ; : [CHAR] IMMEDIATE @@ -51,18 +64,14 @@ ['] LIT , , ; -: CR '\n' emit ; -: SPACE BL emit ; - -: [COMPILE] IMMEDIATE - BL WORD \ get the next word - FIND DROP \ find it in the dictionary - , \ and compile that +\ Convert vocabulary CFA to link addr it contains +: VOCAB>LATEST + 1+ @ ; +\ Compile in recursive call to current word : RECURSE IMMEDIATE - LATEST @ \ LATEST points to the word being compiled at the moment - >CFA \ get the codeword + CURRENT @ VOCAB>LATEST + LINK> \ get the codeword , \ compile it ; -