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add support for string, boolean literals + identifiers

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2021-01-22 12:53:36 +01:00
parent 67a708b9d3
commit 1d4aa6aca2
1 changed files with 57 additions and 12 deletions
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69
src/main/java/codegen/CodeGenerator.java
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@ -25,9 +25,9 @@ public final class CodeGenerator {
map = Map.ofEntries( map = Map.ofEntries(
entry("assignment", gen.getDeclaredMethod("assign", ASTNode.class)), entry("assignment", gen.getDeclaredMethod("assign", ASTNode.class)),
entry("expr", gen.getDeclaredMethod("expr", ASTNode.class)), entry("expr", gen.getDeclaredMethod("expr", ASTNode.class)),
entry("INTEGER_LIT", gen.getDeclaredMethod("literal", ASTNode.class)), entry("INTEGER_LIT", gen.getDeclaredMethod("intLiteral", ASTNode.class)),
entry("BOOLEAN_LIT", gen.getDeclaredMethod("literal", ASTNode.class)), entry("BOOLEAN_LIT", gen.getDeclaredMethod("booleanLiteral", ASTNode.class)),
entry("STRING_LIT", gen.getDeclaredMethod("literal", ASTNode.class)), entry("STRING_LIT", gen.getDeclaredMethod("stringLiteral", ASTNode.class)),
entry("IDENTIFIER", gen.getDeclaredMethod("identifier", ASTNode.class)), entry("IDENTIFIER", gen.getDeclaredMethod("identifier", ASTNode.class)),
entry("print", gen.getDeclaredMethod("println", ASTNode.class)), entry("print", gen.getDeclaredMethod("println", ASTNode.class)),
entry("cond", gen.getDeclaredMethod("cond", ASTNode.class)) entry("cond", gen.getDeclaredMethod("cond", ASTNode.class))
@ -180,9 +180,16 @@ public final class CodeGenerator {
private void assign(ASTNode node) { private void assign(ASTNode node) {
this.generateNode(node.getChildren().get(0)); this.generateNode(node.getChildren().get(0));
log("assign(): " + node.getName() + ": " + node.getValue() + " => istore"); final String type = this.nodeTypeMap.get(node.getChildren().get(0));
final String inst = switch (type) {
case "INTEGER_TYPE", "BOOLEAN_TYPE" -> "istore ";
case "STRING_TYPE" -> "astore ";
default -> throw new IllegalStateException("Unexpected value: " + type);
};
this.jasmin.append("istore ") //!: Type dependant log("assign(): " + node.getName() + ": " + node.getValue() + " => " + inst);
this.jasmin.append(inst)
.append(this.varMap.get(node.getValue())) .append(this.varMap.get(node.getValue()))
.append("\n"); .append("\n");
} }
@ -225,19 +232,45 @@ public final class CodeGenerator {
// Leafs // Leafs
private void literal(ASTNode node) { private void intLiteral(ASTNode node) {
log("literal(): " + node.getName() + ": " + node.getValue() + " => ldc"); log("literal(): " + node.getName() + ": " + node.getValue() + " => ldc");
// bipush only pushes 1 byte as int // bipush only pushes 1 byte as int
this.jasmin.append("ldc ") //!: Type dependant this.jasmin.append("ldc ")
.append(node.getValue()) .append(node.getValue())
.append("\n"); .append("\n");
} }
private void identifier(ASTNode node) { private void stringLiteral(ASTNode node) {
log("identifier(): " + node.getName() + ": " + node.getValue() + " => iload"); log("literal(): " + node.getName() + ": " + node.getValue() + " => ldc");
this.jasmin.append("iload ") //!: Type dependent // bipush only pushes 1 byte as int
this.jasmin.append("ldc ")
.append(node.getValue())
.append("\n");
}
private void booleanLiteral(ASTNode node) {
log("booleanLiteral(): " + node.getName() + ": " + node.getValue() + " => ldc");
final String val = "true".equals(node.getValue()) ? "1" : "0";
this.jasmin.append("ldc ")
.append(val)
.append("\n");
}
private void identifier(ASTNode node) {
final String type = this.nodeTypeMap.get(node);
final String inst = switch (type) {
case "INTEGER_TYPE", "BOOLEAN_TYPE" -> "iload ";
case "STRING_TYPE" -> "aload ";
default -> throw new IllegalStateException("Unexpected value: " + type);
};
log("identifier(): " + node.getName() + ": " + node.getValue() + " => " + inst);
this.jasmin.append(inst)
.append(this.varMap.get(node.getValue())) .append(this.varMap.get(node.getValue()))
.append("\n"); .append("\n");
} }
@ -245,8 +278,20 @@ public final class CodeGenerator {
private void println(ASTNode node) { private void println(ASTNode node) {
this.jasmin.append("getstatic java/lang/System/out Ljava/io/PrintStream;\n"); // Push System.out to stack this.jasmin.append("getstatic java/lang/System/out Ljava/io/PrintStream;\n"); // Push System.out to stack
this.generateNode(node.getChildren().get(1).getChildren().get(1)); final ASTNode expr = node.getChildren().get(1).getChildren().get(1);
final String type = switch (this.nodeTypeMap.get(expr)) {
case "BOOLEAN_TYPE" -> "Z";
case "INTEGER_TYPE" -> "I";
case "STRING_TYPE" -> "Ljava/lang/String;";
default -> throw new IllegalStateException("Unexpected value: " + this.nodeTypeMap.get(expr));
};
this.jasmin.append("invokevirtual java/io/PrintStream/println(I)V\n"); //!: Type dependent this.generateNode(expr);
log("println(): " + expr.getName() + ": " + expr.getValue() + " => " + type);
this.jasmin.append("invokevirtual java/io/PrintStream/println(")
.append(type)
.append(")V\n");
} }
} }